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Member "pcre-8.42/sljit/sljitNativeARM_T2_32.c" (13 Mar 2018, 72505 Bytes) of package /linux/misc/pcre-8.42.tar.bz2:


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    1 /*
    2  *    Stack-less Just-In-Time compiler
    3  *
    4  *    Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without modification, are
    7  * permitted provided that the following conditions are met:
    8  *
    9  *   1. Redistributions of source code must retain the above copyright notice, this list of
   10  *      conditions and the following disclaimer.
   11  *
   12  *   2. Redistributions in binary form must reproduce the above copyright notice, this list
   13  *      of conditions and the following disclaimer in the documentation and/or other materials
   14  *      provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
   17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
   19  * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
   21  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   22  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
   28 {
   29 #ifdef __SOFTFP__
   30     return "ARM-Thumb2" SLJIT_CPUINFO " ABI:softfp";
   31 #else
   32     return "ARM-Thumb2" SLJIT_CPUINFO " ABI:hardfp";
   33 #endif
   34 }
   35 
   36 /* Length of an instruction word. */
   37 typedef sljit_u32 sljit_ins;
   38 
   39 /* Last register + 1. */
   40 #define TMP_REG1    (SLJIT_NUMBER_OF_REGISTERS + 2)
   41 #define TMP_REG2    (SLJIT_NUMBER_OF_REGISTERS + 3)
   42 #define TMP_PC      (SLJIT_NUMBER_OF_REGISTERS + 4)
   43 
   44 #define TMP_FREG1   (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
   45 #define TMP_FREG2   (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 2)
   46 
   47 /* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
   48 static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 5] = {
   49     0, 0, 1, 2, 3, 11, 10, 9, 8, 7, 6, 5, 4, 13, 12, 14, 15
   50 };
   51 
   52 static const sljit_u8 freg_map[SLJIT_NUMBER_OF_FLOAT_REGISTERS + 3] = {
   53     0, 0, 1, 2, 3, 4, 5, 6, 7
   54 };
   55 
   56 #define COPY_BITS(src, from, to, bits) \
   57     ((from >= to ? (src >> (from - to)) : (src << (to - from))) & (((1 << bits) - 1) << to))
   58 
   59 /* Thumb16 encodings. */
   60 #define RD3(rd) (reg_map[rd])
   61 #define RN3(rn) (reg_map[rn] << 3)
   62 #define RM3(rm) (reg_map[rm] << 6)
   63 #define RDN3(rdn) (reg_map[rdn] << 8)
   64 #define IMM3(imm) (imm << 6)
   65 #define IMM8(imm) (imm)
   66 
   67 /* Thumb16 helpers. */
   68 #define SET_REGS44(rd, rn) \
   69     ((reg_map[rn] << 3) | (reg_map[rd] & 0x7) | ((reg_map[rd] & 0x8) << 4))
   70 #define IS_2_LO_REGS(reg1, reg2) \
   71     (reg_map[reg1] <= 7 && reg_map[reg2] <= 7)
   72 #define IS_3_LO_REGS(reg1, reg2, reg3) \
   73     (reg_map[reg1] <= 7 && reg_map[reg2] <= 7 && reg_map[reg3] <= 7)
   74 
   75 /* Thumb32 encodings. */
   76 #define RD4(rd) (reg_map[rd] << 8)
   77 #define RN4(rn) (reg_map[rn] << 16)
   78 #define RM4(rm) (reg_map[rm])
   79 #define RT4(rt) (reg_map[rt] << 12)
   80 #define DD4(dd) (freg_map[dd] << 12)
   81 #define DN4(dn) (freg_map[dn] << 16)
   82 #define DM4(dm) (freg_map[dm])
   83 #define IMM5(imm) \
   84     (COPY_BITS(imm, 2, 12, 3) | ((imm & 0x3) << 6))
   85 #define IMM12(imm) \
   86     (COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff))
   87 
   88 /* --------------------------------------------------------------------- */
   89 /*  Instrucion forms                                                     */
   90 /* --------------------------------------------------------------------- */
   91 
   92 /* dot '.' changed to _
   93    I immediate form (possibly followed by number of immediate bits). */
   94 #define ADCI        0xf1400000
   95 #define ADCS        0x4140
   96 #define ADC_W       0xeb400000
   97 #define ADD     0x4400
   98 #define ADDS        0x1800
   99 #define ADDSI3      0x1c00
  100 #define ADDSI8      0x3000
  101 #define ADD_W       0xeb000000
  102 #define ADDWI       0xf2000000
  103 #define ADD_SP      0xb000
  104 #define ADD_W       0xeb000000
  105 #define ADD_WI      0xf1000000
  106 #define ANDI        0xf0000000
  107 #define ANDS        0x4000
  108 #define AND_W       0xea000000
  109 #define ASRS        0x4100
  110 #define ASRSI       0x1000
  111 #define ASR_W       0xfa40f000
  112 #define ASR_WI      0xea4f0020
  113 #define BCC     0xd000
  114 #define BICI        0xf0200000
  115 #define BKPT        0xbe00
  116 #define BLX     0x4780
  117 #define BX      0x4700
  118 #define CLZ     0xfab0f080
  119 #define CMNI_W      0xf1100f00
  120 #define CMP     0x4280
  121 #define CMPI        0x2800
  122 #define CMPI_W      0xf1b00f00
  123 #define CMP_X       0x4500
  124 #define CMP_W       0xebb00f00
  125 #define EORI        0xf0800000
  126 #define EORS        0x4040
  127 #define EOR_W       0xea800000
  128 #define IT      0xbf00
  129 #define LDRI        0xf8500800
  130 #define LSLS        0x4080
  131 #define LSLSI       0x0000
  132 #define LSL_W       0xfa00f000
  133 #define LSL_WI      0xea4f0000
  134 #define LSRS        0x40c0
  135 #define LSRSI       0x0800
  136 #define LSR_W       0xfa20f000
  137 #define LSR_WI      0xea4f0010
  138 #define MOV     0x4600
  139 #define MOVS        0x0000
  140 #define MOVSI       0x2000
  141 #define MOVT        0xf2c00000
  142 #define MOVW        0xf2400000
  143 #define MOV_W       0xea4f0000
  144 #define MOV_WI      0xf04f0000
  145 #define MUL     0xfb00f000
  146 #define MVNS        0x43c0
  147 #define MVN_W       0xea6f0000
  148 #define MVN_WI      0xf06f0000
  149 #define NOP     0xbf00
  150 #define ORNI        0xf0600000
  151 #define ORRI        0xf0400000
  152 #define ORRS        0x4300
  153 #define ORR_W       0xea400000
  154 #define POP     0xbc00
  155 #define POP_W       0xe8bd0000
  156 #define PUSH        0xb400
  157 #define PUSH_W      0xe92d0000
  158 #define RSB_WI      0xf1c00000
  159 #define RSBSI       0x4240
  160 #define SBCI        0xf1600000
  161 #define SBCS        0x4180
  162 #define SBC_W       0xeb600000
  163 #define SDIV        0xfb90f0f0
  164 #define SMULL       0xfb800000
  165 #define STR_SP      0x9000
  166 #define SUBS        0x1a00
  167 #define SUBSI3      0x1e00
  168 #define SUBSI8      0x3800
  169 #define SUB_W       0xeba00000
  170 #define SUBWI       0xf2a00000
  171 #define SUB_SP      0xb080
  172 #define SUB_WI      0xf1a00000
  173 #define SXTB        0xb240
  174 #define SXTB_W      0xfa4ff080
  175 #define SXTH        0xb200
  176 #define SXTH_W      0xfa0ff080
  177 #define TST     0x4200
  178 #define UDIV        0xfbb0f0f0
  179 #define UMULL       0xfba00000
  180 #define UXTB        0xb2c0
  181 #define UXTB_W      0xfa5ff080
  182 #define UXTH        0xb280
  183 #define UXTH_W      0xfa1ff080
  184 #define VABS_F32    0xeeb00ac0
  185 #define VADD_F32    0xee300a00
  186 #define VCMP_F32    0xeeb40a40
  187 #define VCVT_F32_S32    0xeeb80ac0
  188 #define VCVT_F64_F32    0xeeb70ac0
  189 #define VCVT_S32_F32    0xeebd0ac0
  190 #define VDIV_F32    0xee800a00
  191 #define VMOV_F32    0xeeb00a40
  192 #define VMOV        0xee000a10
  193 #define VMOV2       0xec400a10
  194 #define VMRS        0xeef1fa10
  195 #define VMUL_F32    0xee200a00
  196 #define VNEG_F32    0xeeb10a40
  197 #define VSTR_F32    0xed000a00
  198 #define VSUB_F32    0xee300a40
  199 
  200 static sljit_s32 push_inst16(struct sljit_compiler *compiler, sljit_ins inst)
  201 {
  202     sljit_u16 *ptr;
  203     SLJIT_ASSERT(!(inst & 0xffff0000));
  204 
  205     ptr = (sljit_u16*)ensure_buf(compiler, sizeof(sljit_u16));
  206     FAIL_IF(!ptr);
  207     *ptr = inst;
  208     compiler->size++;
  209     return SLJIT_SUCCESS;
  210 }
  211 
  212 static sljit_s32 push_inst32(struct sljit_compiler *compiler, sljit_ins inst)
  213 {
  214     sljit_u16 *ptr = (sljit_u16*)ensure_buf(compiler, sizeof(sljit_ins));
  215     FAIL_IF(!ptr);
  216     *ptr++ = inst >> 16;
  217     *ptr = inst;
  218     compiler->size += 2;
  219     return SLJIT_SUCCESS;
  220 }
  221 
  222 static SLJIT_INLINE sljit_s32 emit_imm32_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
  223 {
  224     FAIL_IF(push_inst32(compiler, MOVW | RD4(dst)
  225         | COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
  226     return push_inst32(compiler, MOVT | RD4(dst)
  227         | COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
  228 }
  229 
  230 static SLJIT_INLINE void modify_imm32_const(sljit_u16 *inst, sljit_uw new_imm)
  231 {
  232     sljit_s32 dst = inst[1] & 0x0f00;
  233     SLJIT_ASSERT(((inst[0] & 0xfbf0) == (MOVW >> 16)) && ((inst[2] & 0xfbf0) == (MOVT >> 16)) && dst == (inst[3] & 0x0f00));
  234     inst[0] = (MOVW >> 16) | COPY_BITS(new_imm, 12, 0, 4) | COPY_BITS(new_imm, 11, 10, 1);
  235     inst[1] = dst | COPY_BITS(new_imm, 8, 12, 3) | (new_imm & 0xff);
  236     inst[2] = (MOVT >> 16) | COPY_BITS(new_imm, 12 + 16, 0, 4) | COPY_BITS(new_imm, 11 + 16, 10, 1);
  237     inst[3] = dst | COPY_BITS(new_imm, 8 + 16, 12, 3) | ((new_imm & 0xff0000) >> 16);
  238 }
  239 
  240 static SLJIT_INLINE sljit_s32 detect_jump_type(struct sljit_jump *jump, sljit_u16 *code_ptr, sljit_u16 *code, sljit_sw executable_offset)
  241 {
  242     sljit_sw diff;
  243 
  244     if (jump->flags & SLJIT_REWRITABLE_JUMP)
  245         return 0;
  246 
  247     if (jump->flags & JUMP_ADDR) {
  248         /* Branch to ARM code is not optimized yet. */
  249         if (!(jump->u.target & 0x1))
  250             return 0;
  251         diff = ((sljit_sw)jump->u.target - (sljit_sw)(code_ptr + 2) - executable_offset) >> 1;
  252     }
  253     else {
  254         SLJIT_ASSERT(jump->flags & JUMP_LABEL);
  255         diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)(code_ptr + 2)) >> 1;
  256     }
  257 
  258     if (jump->flags & IS_COND) {
  259         SLJIT_ASSERT(!(jump->flags & IS_BL));
  260         if (diff <= 127 && diff >= -128) {
  261             jump->flags |= PATCH_TYPE1;
  262             return 5;
  263         }
  264         if (diff <= 524287 && diff >= -524288) {
  265             jump->flags |= PATCH_TYPE2;
  266             return 4;
  267         }
  268         /* +1 comes from the prefix IT instruction. */
  269         diff--;
  270         if (diff <= 8388607 && diff >= -8388608) {
  271             jump->flags |= PATCH_TYPE3;
  272             return 3;
  273         }
  274     }
  275     else if (jump->flags & IS_BL) {
  276         if (diff <= 8388607 && diff >= -8388608) {
  277             jump->flags |= PATCH_BL;
  278             return 3;
  279         }
  280     }
  281     else {
  282         if (diff <= 1023 && diff >= -1024) {
  283             jump->flags |= PATCH_TYPE4;
  284             return 4;
  285         }
  286         if (diff <= 8388607 && diff >= -8388608) {
  287             jump->flags |= PATCH_TYPE5;
  288             return 3;
  289         }
  290     }
  291 
  292     return 0;
  293 }
  294 
  295 static SLJIT_INLINE void set_jump_instruction(struct sljit_jump *jump, sljit_sw executable_offset)
  296 {
  297     sljit_s32 type = (jump->flags >> 4) & 0xf;
  298     sljit_sw diff;
  299     sljit_u16 *jump_inst;
  300     sljit_s32 s, j1, j2;
  301 
  302     if (SLJIT_UNLIKELY(type == 0)) {
  303         modify_imm32_const((sljit_u16*)jump->addr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target);
  304         return;
  305     }
  306 
  307     if (jump->flags & JUMP_ADDR) {
  308         SLJIT_ASSERT(jump->u.target & 0x1);
  309         diff = ((sljit_sw)jump->u.target - (sljit_sw)(jump->addr + sizeof(sljit_u32)) - executable_offset) >> 1;
  310     }
  311     else {
  312         SLJIT_ASSERT(jump->u.label->addr & 0x1);
  313         diff = ((sljit_sw)(jump->u.label->addr) - (sljit_sw)(jump->addr + sizeof(sljit_u32)) - executable_offset) >> 1;
  314     }
  315     jump_inst = (sljit_u16*)jump->addr;
  316 
  317     switch (type) {
  318     case 1:
  319         /* Encoding T1 of 'B' instruction */
  320         SLJIT_ASSERT(diff <= 127 && diff >= -128 && (jump->flags & IS_COND));
  321         jump_inst[0] = 0xd000 | (jump->flags & 0xf00) | (diff & 0xff);
  322         return;
  323     case 2:
  324         /* Encoding T3 of 'B' instruction */
  325         SLJIT_ASSERT(diff <= 524287 && diff >= -524288 && (jump->flags & IS_COND));
  326         jump_inst[0] = 0xf000 | COPY_BITS(jump->flags, 8, 6, 4) | COPY_BITS(diff, 11, 0, 6) | COPY_BITS(diff, 19, 10, 1);
  327         jump_inst[1] = 0x8000 | COPY_BITS(diff, 17, 13, 1) | COPY_BITS(diff, 18, 11, 1) | (diff & 0x7ff);
  328         return;
  329     case 3:
  330         SLJIT_ASSERT(jump->flags & IS_COND);
  331         *jump_inst++ = IT | ((jump->flags >> 4) & 0xf0) | 0x8;
  332         diff--;
  333         type = 5;
  334         break;
  335     case 4:
  336         /* Encoding T2 of 'B' instruction */
  337         SLJIT_ASSERT(diff <= 1023 && diff >= -1024 && !(jump->flags & IS_COND));
  338         jump_inst[0] = 0xe000 | (diff & 0x7ff);
  339         return;
  340     }
  341 
  342     SLJIT_ASSERT(diff <= 8388607 && diff >= -8388608);
  343 
  344     /* Really complex instruction form for branches. */
  345     s = (diff >> 23) & 0x1;
  346     j1 = (~(diff >> 22) ^ s) & 0x1;
  347     j2 = (~(diff >> 21) ^ s) & 0x1;
  348     jump_inst[0] = 0xf000 | (s << 10) | COPY_BITS(diff, 11, 0, 10);
  349     jump_inst[1] = (j1 << 13) | (j2 << 11) | (diff & 0x7ff);
  350 
  351     /* The others have a common form. */
  352     if (type == 5) /* Encoding T4 of 'B' instruction */
  353         jump_inst[1] |= 0x9000;
  354     else if (type == 6) /* Encoding T1 of 'BL' instruction */
  355         jump_inst[1] |= 0xd000;
  356     else
  357         SLJIT_UNREACHABLE();
  358 }
  359 
  360 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
  361 {
  362     struct sljit_memory_fragment *buf;
  363     sljit_u16 *code;
  364     sljit_u16 *code_ptr;
  365     sljit_u16 *buf_ptr;
  366     sljit_u16 *buf_end;
  367     sljit_uw half_count;
  368     sljit_sw executable_offset;
  369 
  370     struct sljit_label *label;
  371     struct sljit_jump *jump;
  372     struct sljit_const *const_;
  373 
  374     CHECK_ERROR_PTR();
  375     CHECK_PTR(check_sljit_generate_code(compiler));
  376     reverse_buf(compiler);
  377 
  378     code = (sljit_u16*)SLJIT_MALLOC_EXEC(compiler->size * sizeof(sljit_u16));
  379     PTR_FAIL_WITH_EXEC_IF(code);
  380     buf = compiler->buf;
  381 
  382     code_ptr = code;
  383     half_count = 0;
  384     executable_offset = SLJIT_EXEC_OFFSET(code);
  385 
  386     label = compiler->labels;
  387     jump = compiler->jumps;
  388     const_ = compiler->consts;
  389 
  390     do {
  391         buf_ptr = (sljit_u16*)buf->memory;
  392         buf_end = buf_ptr + (buf->used_size >> 1);
  393         do {
  394             *code_ptr = *buf_ptr++;
  395             /* These structures are ordered by their address. */
  396             SLJIT_ASSERT(!label || label->size >= half_count);
  397             SLJIT_ASSERT(!jump || jump->addr >= half_count);
  398             SLJIT_ASSERT(!const_ || const_->addr >= half_count);
  399             if (label && label->size == half_count) {
  400                 label->addr = ((sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset)) | 0x1;
  401                 label->size = code_ptr - code;
  402                 label = label->next;
  403             }
  404             if (jump && jump->addr == half_count) {
  405                     jump->addr = (sljit_uw)code_ptr - ((jump->flags & IS_COND) ? 10 : 8);
  406                     code_ptr -= detect_jump_type(jump, code_ptr, code, executable_offset);
  407                     jump = jump->next;
  408             }
  409             if (const_ && const_->addr == half_count) {
  410                 const_->addr = (sljit_uw)code_ptr;
  411                 const_ = const_->next;
  412             }
  413             code_ptr ++;
  414             half_count ++;
  415         } while (buf_ptr < buf_end);
  416 
  417         buf = buf->next;
  418     } while (buf);
  419 
  420     if (label && label->size == half_count) {
  421         label->addr = ((sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset)) | 0x1;
  422         label->size = code_ptr - code;
  423         label = label->next;
  424     }
  425 
  426     SLJIT_ASSERT(!label);
  427     SLJIT_ASSERT(!jump);
  428     SLJIT_ASSERT(!const_);
  429     SLJIT_ASSERT(code_ptr - code <= (sljit_sw)compiler->size);
  430 
  431     jump = compiler->jumps;
  432     while (jump) {
  433         set_jump_instruction(jump, executable_offset);
  434         jump = jump->next;
  435     }
  436 
  437     compiler->error = SLJIT_ERR_COMPILED;
  438     compiler->executable_offset = executable_offset;
  439     compiler->executable_size = (code_ptr - code) * sizeof(sljit_u16);
  440 
  441     code = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
  442     code_ptr = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
  443 
  444     SLJIT_CACHE_FLUSH(code, code_ptr);
  445     /* Set thumb mode flag. */
  446     return (void*)((sljit_uw)code | 0x1);
  447 }
  448 
  449 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type)
  450 {
  451     switch (feature_type) {
  452     case SLJIT_HAS_FPU:
  453 #ifdef SLJIT_IS_FPU_AVAILABLE
  454         return SLJIT_IS_FPU_AVAILABLE;
  455 #else
  456         /* Available by default. */
  457         return 1;
  458 #endif
  459 
  460     case SLJIT_HAS_CLZ:
  461     case SLJIT_HAS_CMOV:
  462         return 1;
  463 
  464     default:
  465         return 0;
  466     }
  467 }
  468 
  469 /* --------------------------------------------------------------------- */
  470 /*  Core code generator functions.                                       */
  471 /* --------------------------------------------------------------------- */
  472 
  473 #define INVALID_IMM 0x80000000
  474 static sljit_uw get_imm(sljit_uw imm)
  475 {
  476     /* Thumb immediate form. */
  477     sljit_s32 counter;
  478 
  479     if (imm <= 0xff)
  480         return imm;
  481 
  482     if ((imm & 0xffff) == (imm >> 16)) {
  483         /* Some special cases. */
  484         if (!(imm & 0xff00))
  485             return (1 << 12) | (imm & 0xff);
  486         if (!(imm & 0xff))
  487             return (2 << 12) | ((imm >> 8) & 0xff);
  488         if ((imm & 0xff00) == ((imm & 0xff) << 8))
  489             return (3 << 12) | (imm & 0xff);
  490     }
  491 
  492     /* Assembly optimization: count leading zeroes? */
  493     counter = 8;
  494     if (!(imm & 0xffff0000)) {
  495         counter += 16;
  496         imm <<= 16;
  497     }
  498     if (!(imm & 0xff000000)) {
  499         counter += 8;
  500         imm <<= 8;
  501     }
  502     if (!(imm & 0xf0000000)) {
  503         counter += 4;
  504         imm <<= 4;
  505     }
  506     if (!(imm & 0xc0000000)) {
  507         counter += 2;
  508         imm <<= 2;
  509     }
  510     if (!(imm & 0x80000000)) {
  511         counter += 1;
  512         imm <<= 1;
  513     }
  514     /* Since imm >= 128, this must be true. */
  515     SLJIT_ASSERT(counter <= 31);
  516 
  517     if (imm & 0x00ffffff)
  518         return INVALID_IMM; /* Cannot be encoded. */
  519 
  520     return ((imm >> 24) & 0x7f) | COPY_BITS(counter, 4, 26, 1) | COPY_BITS(counter, 1, 12, 3) | COPY_BITS(counter, 0, 7, 1);
  521 }
  522 
  523 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
  524 {
  525     sljit_uw tmp;
  526 
  527     /* MOVS cannot be used since it destroy flags. */
  528 
  529     if (imm >= 0x10000) {
  530         tmp = get_imm(imm);
  531         if (tmp != INVALID_IMM)
  532             return push_inst32(compiler, MOV_WI | RD4(dst) | tmp);
  533         tmp = get_imm(~imm);
  534         if (tmp != INVALID_IMM)
  535             return push_inst32(compiler, MVN_WI | RD4(dst) | tmp);
  536     }
  537 
  538     /* set low 16 bits, set hi 16 bits to 0. */
  539     FAIL_IF(push_inst32(compiler, MOVW | RD4(dst)
  540         | COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
  541 
  542     /* set hi 16 bit if needed. */
  543     if (imm >= 0x10000)
  544         return push_inst32(compiler, MOVT | RD4(dst)
  545             | COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
  546     return SLJIT_SUCCESS;
  547 }
  548 
  549 #define ARG1_IMM    0x0010000
  550 #define ARG2_IMM    0x0020000
  551 /* SET_FLAGS must be 0x100000 as it is also the value of S bit (can be used for optimization). */
  552 #define SET_FLAGS   0x0100000
  553 #define UNUSED_RETURN   0x0200000
  554 
  555 static sljit_s32 emit_op_imm(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 dst, sljit_uw arg1, sljit_uw arg2)
  556 {
  557     /* dst must be register, TMP_REG1
  558        arg1 must be register, imm
  559        arg2 must be register, imm */
  560     sljit_s32 reg;
  561     sljit_uw imm, nimm;
  562 
  563     if (SLJIT_UNLIKELY((flags & (ARG1_IMM | ARG2_IMM)) == (ARG1_IMM | ARG2_IMM))) {
  564         /* Both are immediates, no temporaries are used. */
  565         flags &= ~ARG1_IMM;
  566         FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
  567         arg1 = TMP_REG1;
  568     }
  569 
  570     if (flags & (ARG1_IMM | ARG2_IMM)) {
  571         reg = (flags & ARG2_IMM) ? arg1 : arg2;
  572         imm = (flags & ARG2_IMM) ? arg2 : arg1;
  573 
  574         switch (flags & 0xffff) {
  575         case SLJIT_CLZ:
  576         case SLJIT_MUL:
  577             /* No form with immediate operand. */
  578             break;
  579         case SLJIT_MOV:
  580             SLJIT_ASSERT(!(flags & SET_FLAGS) && (flags & ARG2_IMM) && arg1 == TMP_REG2);
  581             return load_immediate(compiler, dst, imm);
  582         case SLJIT_NOT:
  583             if (!(flags & SET_FLAGS))
  584                 return load_immediate(compiler, dst, ~imm);
  585             /* Since the flags should be set, we just fallback to the register mode.
  586                Although some clever things could be done here, "NOT IMM" does not worth the efforts. */
  587             break;
  588         case SLJIT_ADD:
  589             nimm = -imm;
  590             if (IS_2_LO_REGS(reg, dst)) {
  591                 if (imm <= 0x7)
  592                     return push_inst16(compiler, ADDSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
  593                 if (nimm <= 0x7)
  594                     return push_inst16(compiler, SUBSI3 | IMM3(nimm) | RD3(dst) | RN3(reg));
  595                 if (reg == dst) {
  596                     if (imm <= 0xff)
  597                         return push_inst16(compiler, ADDSI8 | IMM8(imm) | RDN3(dst));
  598                     if (nimm <= 0xff)
  599                         return push_inst16(compiler, SUBSI8 | IMM8(nimm) | RDN3(dst));
  600                 }
  601             }
  602             if (!(flags & SET_FLAGS)) {
  603                 if (imm <= 0xfff)
  604                     return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(imm));
  605                 if (nimm <= 0xfff)
  606                     return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(nimm));
  607             }
  608             nimm = get_imm(imm);
  609             if (nimm != INVALID_IMM)
  610                 return push_inst32(compiler, ADD_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
  611             nimm = get_imm(-imm);
  612             if (nimm != INVALID_IMM)
  613                 return push_inst32(compiler, SUB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
  614             break;
  615         case SLJIT_ADDC:
  616             imm = get_imm(imm);
  617             if (imm != INVALID_IMM)
  618                 return push_inst32(compiler, ADCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
  619             break;
  620         case SLJIT_SUB:
  621             /* SUB operation can be replaced by ADD because of the negative carry flag. */
  622             if (flags & ARG1_IMM) {
  623                 if (imm == 0 && IS_2_LO_REGS(reg, dst))
  624                     return push_inst16(compiler, RSBSI | RD3(dst) | RN3(reg));
  625                 imm = get_imm(imm);
  626                 if (imm != INVALID_IMM)
  627                     return push_inst32(compiler, RSB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
  628                 break;
  629             }
  630             if (flags & UNUSED_RETURN) {
  631                 if (imm <= 0xff && reg_map[reg] <= 7)
  632                     return push_inst16(compiler, CMPI | IMM8(imm) | RDN3(reg));
  633                 nimm = get_imm(imm);
  634                 if (nimm != INVALID_IMM)
  635                     return push_inst32(compiler, CMPI_W | RN4(reg) | nimm);
  636                 nimm = get_imm(-imm);
  637                 if (nimm != INVALID_IMM)
  638                     return push_inst32(compiler, CMNI_W | RN4(reg) | nimm);
  639             }
  640             nimm = -imm;
  641             if (IS_2_LO_REGS(reg, dst)) {
  642                 if (imm <= 0x7)
  643                     return push_inst16(compiler, SUBSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
  644                 if (nimm <= 0x7)
  645                     return push_inst16(compiler, ADDSI3 | IMM3(nimm) | RD3(dst) | RN3(reg));
  646                 if (reg == dst) {
  647                     if (imm <= 0xff)
  648                         return push_inst16(compiler, SUBSI8 | IMM8(imm) | RDN3(dst));
  649                     if (nimm <= 0xff)
  650                         return push_inst16(compiler, ADDSI8 | IMM8(nimm) | RDN3(dst));
  651                 }
  652             }
  653             if (!(flags & SET_FLAGS)) {
  654                 if (imm <= 0xfff)
  655                     return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(imm));
  656                 if (nimm <= 0xfff)
  657                     return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(nimm));
  658             }
  659             nimm = get_imm(imm);
  660             if (nimm != INVALID_IMM)
  661                 return push_inst32(compiler, SUB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
  662             nimm = get_imm(-imm);
  663             if (nimm != INVALID_IMM)
  664                 return push_inst32(compiler, ADD_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
  665             break;
  666         case SLJIT_SUBC:
  667             if (flags & ARG1_IMM)
  668                 break;
  669             imm = get_imm(imm);
  670             if (imm != INVALID_IMM)
  671                 return push_inst32(compiler, SBCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
  672             break;
  673         case SLJIT_AND:
  674             nimm = get_imm(imm);
  675             if (nimm != INVALID_IMM)
  676                 return push_inst32(compiler, ANDI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
  677             imm = get_imm(imm);
  678             if (imm != INVALID_IMM)
  679                 return push_inst32(compiler, BICI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
  680             break;
  681         case SLJIT_OR:
  682             nimm = get_imm(imm);
  683             if (nimm != INVALID_IMM)
  684                 return push_inst32(compiler, ORRI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
  685             imm = get_imm(imm);
  686             if (imm != INVALID_IMM)
  687                 return push_inst32(compiler, ORNI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
  688             break;
  689         case SLJIT_XOR:
  690             imm = get_imm(imm);
  691             if (imm != INVALID_IMM)
  692                 return push_inst32(compiler, EORI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
  693             break;
  694         case SLJIT_SHL:
  695         case SLJIT_LSHR:
  696         case SLJIT_ASHR:
  697             if (flags & ARG1_IMM)
  698                 break;
  699             imm &= 0x1f;
  700             if (imm == 0) {
  701                 if (!(flags & SET_FLAGS))
  702                     return push_inst16(compiler, MOV | SET_REGS44(dst, reg));
  703                 if (IS_2_LO_REGS(dst, reg))
  704                     return push_inst16(compiler, MOVS | RD3(dst) | RN3(reg));
  705                 return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(dst) | RM4(reg));
  706             }
  707             switch (flags & 0xffff) {
  708             case SLJIT_SHL:
  709                 if (IS_2_LO_REGS(dst, reg))
  710                     return push_inst16(compiler, LSLSI | RD3(dst) | RN3(reg) | (imm << 6));
  711                 return push_inst32(compiler, LSL_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
  712             case SLJIT_LSHR:
  713                 if (IS_2_LO_REGS(dst, reg))
  714                     return push_inst16(compiler, LSRSI | RD3(dst) | RN3(reg) | (imm << 6));
  715                 return push_inst32(compiler, LSR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
  716             default: /* SLJIT_ASHR */
  717                 if (IS_2_LO_REGS(dst, reg))
  718                     return push_inst16(compiler, ASRSI | RD3(dst) | RN3(reg) | (imm << 6));
  719                 return push_inst32(compiler, ASR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
  720             }
  721         default:
  722             SLJIT_UNREACHABLE();
  723             break;
  724         }
  725 
  726         if (flags & ARG2_IMM) {
  727             imm = arg2;
  728             arg2 = (arg1 == TMP_REG1) ? TMP_REG2 : TMP_REG1;
  729             FAIL_IF(load_immediate(compiler, arg2, imm));
  730         }
  731         else {
  732             imm = arg1;
  733             arg1 = (arg2 == TMP_REG1) ? TMP_REG2 : TMP_REG1;
  734             FAIL_IF(load_immediate(compiler, arg1, imm));
  735         }
  736 
  737         SLJIT_ASSERT(arg1 != arg2);
  738     }
  739 
  740     /* Both arguments are registers. */
  741     switch (flags & 0xffff) {
  742     case SLJIT_MOV:
  743     case SLJIT_MOV_U32:
  744     case SLJIT_MOV_S32:
  745     case SLJIT_MOV_P:
  746         SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
  747         if (dst == arg2)
  748             return SLJIT_SUCCESS;
  749         return push_inst16(compiler, MOV | SET_REGS44(dst, arg2));
  750     case SLJIT_MOV_U8:
  751         SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
  752         if (IS_2_LO_REGS(dst, arg2))
  753             return push_inst16(compiler, UXTB | RD3(dst) | RN3(arg2));
  754         return push_inst32(compiler, UXTB_W | RD4(dst) | RM4(arg2));
  755     case SLJIT_MOV_S8:
  756         SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
  757         if (IS_2_LO_REGS(dst, arg2))
  758             return push_inst16(compiler, SXTB | RD3(dst) | RN3(arg2));
  759         return push_inst32(compiler, SXTB_W | RD4(dst) | RM4(arg2));
  760     case SLJIT_MOV_U16:
  761         SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
  762         if (IS_2_LO_REGS(dst, arg2))
  763             return push_inst16(compiler, UXTH | RD3(dst) | RN3(arg2));
  764         return push_inst32(compiler, UXTH_W | RD4(dst) | RM4(arg2));
  765     case SLJIT_MOV_S16:
  766         SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
  767         if (IS_2_LO_REGS(dst, arg2))
  768             return push_inst16(compiler, SXTH | RD3(dst) | RN3(arg2));
  769         return push_inst32(compiler, SXTH_W | RD4(dst) | RM4(arg2));
  770     case SLJIT_NOT:
  771         SLJIT_ASSERT(arg1 == TMP_REG2);
  772         if (IS_2_LO_REGS(dst, arg2))
  773             return push_inst16(compiler, MVNS | RD3(dst) | RN3(arg2));
  774         return push_inst32(compiler, MVN_W | (flags & SET_FLAGS) | RD4(dst) | RM4(arg2));
  775     case SLJIT_CLZ:
  776         SLJIT_ASSERT(arg1 == TMP_REG2);
  777         FAIL_IF(push_inst32(compiler, CLZ | RN4(arg2) | RD4(dst) | RM4(arg2)));
  778         return SLJIT_SUCCESS;
  779     case SLJIT_ADD:
  780         if (IS_3_LO_REGS(dst, arg1, arg2))
  781             return push_inst16(compiler, ADDS | RD3(dst) | RN3(arg1) | RM3(arg2));
  782         if (dst == arg1 && !(flags & SET_FLAGS))
  783             return push_inst16(compiler, ADD | SET_REGS44(dst, arg2));
  784         return push_inst32(compiler, ADD_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  785     case SLJIT_ADDC:
  786         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  787             return push_inst16(compiler, ADCS | RD3(dst) | RN3(arg2));
  788         return push_inst32(compiler, ADC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  789     case SLJIT_SUB:
  790         if (flags & UNUSED_RETURN) {
  791             if (IS_2_LO_REGS(arg1, arg2))
  792                 return push_inst16(compiler, CMP | RD3(arg1) | RN3(arg2));
  793             return push_inst16(compiler, CMP_X | SET_REGS44(arg1, arg2));
  794         }
  795         if (IS_3_LO_REGS(dst, arg1, arg2))
  796             return push_inst16(compiler, SUBS | RD3(dst) | RN3(arg1) | RM3(arg2));
  797         return push_inst32(compiler, SUB_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  798     case SLJIT_SUBC:
  799         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  800             return push_inst16(compiler, SBCS | RD3(dst) | RN3(arg2));
  801         return push_inst32(compiler, SBC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  802     case SLJIT_MUL:
  803         if (!(flags & SET_FLAGS))
  804             return push_inst32(compiler, MUL | RD4(dst) | RN4(arg1) | RM4(arg2));
  805         SLJIT_ASSERT(dst != TMP_REG2);
  806         FAIL_IF(push_inst32(compiler, SMULL | RT4(dst) | RD4(TMP_REG2) | RN4(arg1) | RM4(arg2)));
  807         /* cmp TMP_REG2, dst asr #31. */
  808         return push_inst32(compiler, CMP_W | RN4(TMP_REG2) | 0x70e0 | RM4(dst));
  809     case SLJIT_AND:
  810         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  811             return push_inst16(compiler, ANDS | RD3(dst) | RN3(arg2));
  812         if ((flags & UNUSED_RETURN) && IS_2_LO_REGS(arg1, arg2))
  813             return push_inst16(compiler, TST | RD3(arg1) | RN3(arg2));
  814         return push_inst32(compiler, AND_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  815     case SLJIT_OR:
  816         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  817             return push_inst16(compiler, ORRS | RD3(dst) | RN3(arg2));
  818         return push_inst32(compiler, ORR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  819     case SLJIT_XOR:
  820         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  821             return push_inst16(compiler, EORS | RD3(dst) | RN3(arg2));
  822         return push_inst32(compiler, EOR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  823     case SLJIT_SHL:
  824         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  825             return push_inst16(compiler, LSLS | RD3(dst) | RN3(arg2));
  826         return push_inst32(compiler, LSL_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  827     case SLJIT_LSHR:
  828         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  829             return push_inst16(compiler, LSRS | RD3(dst) | RN3(arg2));
  830         return push_inst32(compiler, LSR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  831     case SLJIT_ASHR:
  832         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
  833             return push_inst16(compiler, ASRS | RD3(dst) | RN3(arg2));
  834         return push_inst32(compiler, ASR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
  835     }
  836 
  837     SLJIT_UNREACHABLE();
  838     return SLJIT_SUCCESS;
  839 }
  840 
  841 #define STORE       0x01
  842 #define SIGNED      0x02
  843 
  844 #define WORD_SIZE   0x00
  845 #define BYTE_SIZE   0x04
  846 #define HALF_SIZE   0x08
  847 #define PRELOAD     0x0c
  848 
  849 #define IS_WORD_SIZE(flags)     (!(flags & (BYTE_SIZE | HALF_SIZE)))
  850 #define OFFSET_CHECK(imm, shift)    (!(argw & ~(imm << shift)))
  851 
  852 /*
  853   1st letter:
  854   w = word
  855   b = byte
  856   h = half
  857 
  858   2nd letter:
  859   s = signed
  860   u = unsigned
  861 
  862   3rd letter:
  863   l = load
  864   s = store
  865 */
  866 
  867 static const sljit_ins sljit_mem16[12] = {
  868 /* w u l */ 0x5800 /* ldr */,
  869 /* w u s */ 0x5000 /* str */,
  870 /* w s l */ 0x5800 /* ldr */,
  871 /* w s s */ 0x5000 /* str */,
  872 
  873 /* b u l */ 0x5c00 /* ldrb */,
  874 /* b u s */ 0x5400 /* strb */,
  875 /* b s l */ 0x5600 /* ldrsb */,
  876 /* b s s */ 0x5400 /* strb */,
  877 
  878 /* h u l */ 0x5a00 /* ldrh */,
  879 /* h u s */ 0x5200 /* strh */,
  880 /* h s l */ 0x5e00 /* ldrsh */,
  881 /* h s s */ 0x5200 /* strh */,
  882 };
  883 
  884 static const sljit_ins sljit_mem16_imm5[12] = {
  885 /* w u l */ 0x6800 /* ldr imm5 */,
  886 /* w u s */ 0x6000 /* str imm5 */,
  887 /* w s l */ 0x6800 /* ldr imm5 */,
  888 /* w s s */ 0x6000 /* str imm5 */,
  889 
  890 /* b u l */ 0x7800 /* ldrb imm5 */,
  891 /* b u s */ 0x7000 /* strb imm5 */,
  892 /* b s l */ 0x0000 /* not allowed */,
  893 /* b s s */ 0x7000 /* strb imm5 */,
  894 
  895 /* h u l */ 0x8800 /* ldrh imm5 */,
  896 /* h u s */ 0x8000 /* strh imm5 */,
  897 /* h s l */ 0x0000 /* not allowed */,
  898 /* h s s */ 0x8000 /* strh imm5 */,
  899 };
  900 
  901 #define MEM_IMM8    0xc00
  902 #define MEM_IMM12   0x800000
  903 static const sljit_ins sljit_mem32[13] = {
  904 /* w u l */ 0xf8500000 /* ldr.w */,
  905 /* w u s */ 0xf8400000 /* str.w */,
  906 /* w s l */ 0xf8500000 /* ldr.w */,
  907 /* w s s */ 0xf8400000 /* str.w */,
  908 
  909 /* b u l */ 0xf8100000 /* ldrb.w */,
  910 /* b u s */ 0xf8000000 /* strb.w */,
  911 /* b s l */ 0xf9100000 /* ldrsb.w */,
  912 /* b s s */ 0xf8000000 /* strb.w */,
  913 
  914 /* h u l */ 0xf8300000 /* ldrh.w */,
  915 /* h u s */ 0xf8200000 /* strsh.w */,
  916 /* h s l */ 0xf9300000 /* ldrsh.w */,
  917 /* h s s */ 0xf8200000 /* strsh.w */,
  918 
  919 /* p u l */ 0xf8100000 /* pld */,
  920 };
  921 
  922 /* Helper function. Dst should be reg + value, using at most 1 instruction, flags does not set. */
  923 static sljit_s32 emit_set_delta(struct sljit_compiler *compiler, sljit_s32 dst, sljit_s32 reg, sljit_sw value)
  924 {
  925     if (value >= 0) {
  926         if (value <= 0xfff)
  927             return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(value));
  928         value = get_imm(value);
  929         if (value != INVALID_IMM)
  930             return push_inst32(compiler, ADD_WI | RD4(dst) | RN4(reg) | value);
  931     }
  932     else {
  933         value = -value;
  934         if (value <= 0xfff)
  935             return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(value));
  936         value = get_imm(value);
  937         if (value != INVALID_IMM)
  938             return push_inst32(compiler, SUB_WI | RD4(dst) | RN4(reg) | value);
  939     }
  940     return SLJIT_ERR_UNSUPPORTED;
  941 }
  942 
  943 static SLJIT_INLINE sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
  944     sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
  945 {
  946     sljit_s32 other_r;
  947     sljit_uw tmp;
  948 
  949     SLJIT_ASSERT(arg & SLJIT_MEM);
  950     SLJIT_ASSERT((arg & REG_MASK) != tmp_reg);
  951     arg &= ~SLJIT_MEM;
  952 
  953     if (SLJIT_UNLIKELY(!(arg & REG_MASK))) {
  954         tmp = get_imm(argw & ~0xfff);
  955         if (tmp != INVALID_IMM) {
  956             FAIL_IF(push_inst32(compiler, MOV_WI | RD4(tmp_reg) | tmp));
  957             return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(tmp_reg) | (argw & 0xfff));
  958         }
  959 
  960         FAIL_IF(load_immediate(compiler, tmp_reg, argw));
  961         if (IS_2_LO_REGS(reg, tmp_reg) && sljit_mem16_imm5[flags])
  962             return push_inst16(compiler, sljit_mem16_imm5[flags] | RD3(reg) | RN3(tmp_reg));
  963         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(tmp_reg));
  964     }
  965 
  966     if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
  967         argw &= 0x3;
  968         other_r = OFFS_REG(arg);
  969         arg &= 0xf;
  970 
  971         if (!argw && IS_3_LO_REGS(reg, arg, other_r))
  972             return push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(other_r));
  973         return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(other_r) | (argw << 4));
  974     }
  975 
  976     if (argw > 0xfff) {
  977         tmp = get_imm(argw & ~0xfff);
  978         if (tmp != INVALID_IMM) {
  979             push_inst32(compiler, ADD_WI | RD4(tmp_reg) | RN4(arg) | tmp);
  980             arg = tmp_reg;
  981             argw = argw & 0xfff;
  982         }
  983     }
  984     else if (argw < -0xff) {
  985         tmp = get_imm(-argw & ~0xff);
  986         if (tmp != INVALID_IMM) {
  987             push_inst32(compiler, SUB_WI | RD4(tmp_reg) | RN4(arg) | tmp);
  988             arg = tmp_reg;
  989             argw = -(-argw & 0xff);
  990         }
  991     }
  992 
  993     if (IS_2_LO_REGS(reg, arg) && sljit_mem16_imm5[flags]) {
  994         tmp = 3;
  995         if (IS_WORD_SIZE(flags)) {
  996             if (OFFSET_CHECK(0x1f, 2))
  997                 tmp = 2;
  998         }
  999         else if (flags & BYTE_SIZE)
 1000         {
 1001             if (OFFSET_CHECK(0x1f, 0))
 1002                 tmp = 0;
 1003         }
 1004         else {
 1005             SLJIT_ASSERT(flags & HALF_SIZE);
 1006             if (OFFSET_CHECK(0x1f, 1))
 1007                 tmp = 1;
 1008         }
 1009 
 1010         if (tmp < 3)
 1011             return push_inst16(compiler, sljit_mem16_imm5[flags] | RD3(reg) | RN3(arg) | (argw << (6 - tmp)));
 1012     }
 1013     else if (SLJIT_UNLIKELY(arg == SLJIT_SP) && IS_WORD_SIZE(flags) && OFFSET_CHECK(0xff, 2) && reg_map[reg] <= 7) {
 1014         /* SP based immediate. */
 1015         return push_inst16(compiler, STR_SP | ((flags & STORE) ? 0 : 0x800) | RDN3(reg) | (argw >> 2));
 1016     }
 1017 
 1018     if (argw >= 0 && argw <= 0xfff)
 1019         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(arg) | argw);
 1020     else if (argw < 0 && argw >= -0xff)
 1021         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(arg) | -argw);
 1022 
 1023     SLJIT_ASSERT(arg != tmp_reg);
 1024 
 1025     FAIL_IF(load_immediate(compiler, tmp_reg, argw));
 1026     if (IS_3_LO_REGS(reg, arg, tmp_reg))
 1027         return push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(tmp_reg));
 1028     return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(tmp_reg));
 1029 }
 1030 
 1031 /* --------------------------------------------------------------------- */
 1032 /*  Entry, exit                                                          */
 1033 /* --------------------------------------------------------------------- */
 1034 
 1035 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
 1036     sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
 1037     sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
 1038 {
 1039     sljit_s32 args, size, i, tmp;
 1040     sljit_ins push = 0;
 1041 #ifdef _WIN32
 1042     sljit_uw imm;
 1043 #endif
 1044 
 1045     CHECK_ERROR();
 1046     CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
 1047     set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
 1048 
 1049     tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
 1050     for (i = SLJIT_S0; i >= tmp; i--)
 1051         push |= 1 << reg_map[i];
 1052 
 1053     for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
 1054         push |= 1 << reg_map[i];
 1055 
 1056     FAIL_IF((push & 0xff00)
 1057         ? push_inst32(compiler, PUSH_W | (1 << 14) | push)
 1058         : push_inst16(compiler, PUSH | (1 << 8) | push));
 1059 
 1060     /* Stack must be aligned to 8 bytes: (LR, R4) */
 1061     size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
 1062     local_size = ((size + local_size + 7) & ~7) - size;
 1063     compiler->local_size = local_size;
 1064 
 1065 #ifdef _WIN32
 1066     if (local_size >= 256) {
 1067         if (local_size > 4096)
 1068             imm = get_imm(4096);
 1069         else
 1070             imm = get_imm(local_size & ~0xff);
 1071 
 1072         SLJIT_ASSERT(imm != INVALID_IMM);
 1073         FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(SLJIT_SP) | imm));
 1074     }
 1075 #else
 1076     if (local_size > 0) {
 1077         if (local_size <= (127 << 2))
 1078             FAIL_IF(push_inst16(compiler, SUB_SP | (local_size >> 2)));
 1079         else
 1080             FAIL_IF(emit_op_imm(compiler, SLJIT_SUB | ARG2_IMM, SLJIT_SP, SLJIT_SP, local_size));
 1081     }
 1082 #endif
 1083 
 1084     args = get_arg_count(arg_types);
 1085 
 1086     if (args >= 1)
 1087         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S0, SLJIT_R0)));
 1088     if (args >= 2)
 1089         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S1, SLJIT_R1)));
 1090     if (args >= 3)
 1091         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S2, SLJIT_R2)));
 1092 
 1093 #ifdef _WIN32
 1094     if (local_size >= 256) {
 1095         if (local_size > 4096) {
 1096             imm = get_imm(4096);
 1097             SLJIT_ASSERT(imm != INVALID_IMM);
 1098 
 1099             if (local_size < 4 * 4096) {
 1100                 if (local_size > 2 * 4096) {
 1101                     FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
 1102                     FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
 1103                     local_size -= 4096;
 1104                 }
 1105 
 1106                 if (local_size > 2 * 4096) {
 1107                     FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
 1108                     FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
 1109                     local_size -= 4096;
 1110                 }
 1111 
 1112                 FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
 1113                 local_size -= 4096;
 1114 
 1115                 SLJIT_ASSERT(local_size > 0);
 1116             }
 1117             else {
 1118                 FAIL_IF(load_immediate(compiler, SLJIT_R3, (local_size >> 12) - 1));
 1119                 FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
 1120                 FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
 1121                 SLJIT_ASSERT(reg_map[SLJIT_R3] < 7);
 1122                 FAIL_IF(push_inst16(compiler, SUBSI8 | RDN3(SLJIT_R3) | 1));
 1123                 FAIL_IF(push_inst16(compiler, BCC | (0x1 << 8) /* not-equal */ | (-7 & 0xff)));
 1124 
 1125                 local_size &= 0xfff;
 1126 
 1127                 if (local_size != 0)
 1128                     FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
 1129             }
 1130 
 1131             if (local_size >= 256) {
 1132                 imm = get_imm(local_size & ~0xff);
 1133                 SLJIT_ASSERT(imm != INVALID_IMM);
 1134 
 1135                 FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
 1136             }
 1137         }
 1138 
 1139         local_size &= 0xff;
 1140         FAIL_IF(push_inst32(compiler, LDRI | 0x400 | (local_size > 0 ? 0x100 : 0) | RT4(TMP_REG2) | RN4(TMP_REG1) | local_size));
 1141 
 1142         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_SP, TMP_REG1)));
 1143     }
 1144     else if (local_size > 0)
 1145         FAIL_IF(push_inst32(compiler, LDRI | 0x500 | RT4(TMP_REG1) | RN4(SLJIT_SP) | local_size));
 1146 #endif
 1147 
 1148     return SLJIT_SUCCESS;
 1149 }
 1150 
 1151 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
 1152     sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
 1153     sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
 1154 {
 1155     sljit_s32 size;
 1156 
 1157     CHECK_ERROR();
 1158     CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
 1159     set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
 1160 
 1161     size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
 1162     compiler->local_size = ((size + local_size + 7) & ~7) - size;
 1163     return SLJIT_SUCCESS;
 1164 }
 1165 
 1166 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
 1167 {
 1168     sljit_s32 i, tmp;
 1169     sljit_ins pop = 0;
 1170 
 1171     CHECK_ERROR();
 1172     CHECK(check_sljit_emit_return(compiler, op, src, srcw));
 1173 
 1174     FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
 1175 
 1176     if (compiler->local_size > 0) {
 1177         if (compiler->local_size <= (127 << 2))
 1178             FAIL_IF(push_inst16(compiler, ADD_SP | (compiler->local_size >> 2)));
 1179         else
 1180             FAIL_IF(emit_op_imm(compiler, SLJIT_ADD | ARG2_IMM, SLJIT_SP, SLJIT_SP, compiler->local_size));
 1181     }
 1182 
 1183     tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
 1184     for (i = SLJIT_S0; i >= tmp; i--)
 1185         pop |= 1 << reg_map[i];
 1186 
 1187     for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
 1188         pop |= 1 << reg_map[i];
 1189 
 1190     return (pop & 0xff00)
 1191         ? push_inst32(compiler, POP_W | (1 << 15) | pop)
 1192         : push_inst16(compiler, POP | (1 << 8) | pop);
 1193 }
 1194 
 1195 /* --------------------------------------------------------------------- */
 1196 /*  Operators                                                            */
 1197 /* --------------------------------------------------------------------- */
 1198 
 1199 #if !(defined __ARM_FEATURE_IDIV) && !(defined __ARM_ARCH_EXT_IDIV__)
 1200 
 1201 #ifdef __cplusplus
 1202 extern "C" {
 1203 #endif
 1204 
 1205 #ifdef _WIN32
 1206 extern unsigned long long __rt_udiv(unsigned int denominator, unsigned int numerator);
 1207 extern long long __rt_sdiv(int denominator, int numerator);
 1208 #elif defined(__GNUC__)
 1209 extern unsigned int __aeabi_uidivmod(unsigned int numerator, int unsigned denominator);
 1210 extern int __aeabi_idivmod(int numerator, int denominator);
 1211 #else
 1212 #error "Software divmod functions are needed"
 1213 #endif
 1214 
 1215 #ifdef __cplusplus
 1216 }
 1217 #endif
 1218 
 1219 #endif /* !__ARM_FEATURE_IDIV && !__ARM_ARCH_EXT_IDIV__ */
 1220 
 1221 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
 1222 {
 1223 #if !(defined __ARM_FEATURE_IDIV) && !(defined __ARM_ARCH_EXT_IDIV__)
 1224     sljit_sw saved_reg_list[3];
 1225     sljit_sw saved_reg_count;
 1226 #endif
 1227 
 1228     CHECK_ERROR();
 1229     CHECK(check_sljit_emit_op0(compiler, op));
 1230 
 1231     op = GET_OPCODE(op);
 1232     switch (op) {
 1233     case SLJIT_BREAKPOINT:
 1234         return push_inst16(compiler, BKPT);
 1235     case SLJIT_NOP:
 1236         return push_inst16(compiler, NOP);
 1237     case SLJIT_LMUL_UW:
 1238     case SLJIT_LMUL_SW:
 1239         return push_inst32(compiler, (op == SLJIT_LMUL_UW ? UMULL : SMULL)
 1240             | (reg_map[SLJIT_R1] << 8)
 1241             | (reg_map[SLJIT_R0] << 12)
 1242             | (reg_map[SLJIT_R0] << 16)
 1243             | reg_map[SLJIT_R1]);
 1244 #if (defined __ARM_FEATURE_IDIV) || (defined __ARM_ARCH_EXT_IDIV__)
 1245     case SLJIT_DIVMOD_UW:
 1246     case SLJIT_DIVMOD_SW:
 1247         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG1, SLJIT_R0)));
 1248         FAIL_IF(push_inst32(compiler, (op == SLJIT_DIVMOD_UW ? UDIV : SDIV) | RD4(SLJIT_R0) | RN4(SLJIT_R0) | RM4(SLJIT_R1)));
 1249         FAIL_IF(push_inst32(compiler, MUL | RD4(SLJIT_R1) | RN4(SLJIT_R0) | RM4(SLJIT_R1)));
 1250         return push_inst32(compiler, SUB_W | RD4(SLJIT_R1) | RN4(TMP_REG1) | RM4(SLJIT_R1));
 1251     case SLJIT_DIV_UW:
 1252     case SLJIT_DIV_SW:
 1253         return push_inst32(compiler, (op == SLJIT_DIV_UW ? UDIV : SDIV) | RD4(SLJIT_R0) | RN4(SLJIT_R0) | RM4(SLJIT_R1));
 1254 #else /* !__ARM_FEATURE_IDIV && !__ARM_ARCH_EXT_IDIV__ */
 1255     case SLJIT_DIVMOD_UW:
 1256     case SLJIT_DIVMOD_SW:
 1257     case SLJIT_DIV_UW:
 1258     case SLJIT_DIV_SW:
 1259         SLJIT_COMPILE_ASSERT((SLJIT_DIVMOD_UW & 0x2) == 0 && SLJIT_DIV_UW - 0x2 == SLJIT_DIVMOD_UW, bad_div_opcode_assignments);
 1260         SLJIT_ASSERT(reg_map[2] == 1 && reg_map[3] == 2 && reg_map[4] == 3);
 1261 
 1262         saved_reg_count = 0;
 1263         if (compiler->scratches >= 4)
 1264             saved_reg_list[saved_reg_count++] = 3;
 1265         if (compiler->scratches >= 3)
 1266             saved_reg_list[saved_reg_count++] = 2;
 1267         if (op >= SLJIT_DIV_UW)
 1268             saved_reg_list[saved_reg_count++] = 1;
 1269 
 1270         if (saved_reg_count > 0) {
 1271             FAIL_IF(push_inst32(compiler, 0xf84d0d00 | (saved_reg_count >= 3 ? 16 : 8)
 1272                         | (saved_reg_list[0] << 12) /* str rX, [sp, #-8/-16]! */));
 1273             if (saved_reg_count >= 2) {
 1274                 SLJIT_ASSERT(saved_reg_list[1] < 8);
 1275                 FAIL_IF(push_inst16(compiler, 0x9001 | (saved_reg_list[1] << 8) /* str rX, [sp, #4] */));
 1276             }
 1277             if (saved_reg_count >= 3) {
 1278                 SLJIT_ASSERT(saved_reg_list[2] < 8);
 1279                 FAIL_IF(push_inst16(compiler, 0x9002 | (saved_reg_list[2] << 8) /* str rX, [sp, #8] */));
 1280             }
 1281         }
 1282 
 1283 #ifdef _WIN32
 1284         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG1, SLJIT_R0)));
 1285         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_R0, SLJIT_R1)));
 1286         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_R1, TMP_REG1)));
 1287         FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
 1288             ((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__rt_udiv) : SLJIT_FUNC_OFFSET(__rt_sdiv))));
 1289 #elif defined(__GNUC__)
 1290         FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
 1291             ((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
 1292 #else
 1293 #error "Software divmod functions are needed"
 1294 #endif
 1295 
 1296         if (saved_reg_count > 0) {
 1297             if (saved_reg_count >= 3) {
 1298                 SLJIT_ASSERT(saved_reg_list[2] < 8);
 1299                 FAIL_IF(push_inst16(compiler, 0x9802 | (saved_reg_list[2] << 8) /* ldr rX, [sp, #8] */));
 1300             }
 1301             if (saved_reg_count >= 2) {
 1302                 SLJIT_ASSERT(saved_reg_list[1] < 8);
 1303                 FAIL_IF(push_inst16(compiler, 0x9801 | (saved_reg_list[1] << 8) /* ldr rX, [sp, #4] */));
 1304             }
 1305             return push_inst32(compiler, 0xf85d0b00 | (saved_reg_count >= 3 ? 16 : 8)
 1306                         | (saved_reg_list[0] << 12) /* ldr rX, [sp], #8/16 */);
 1307         }
 1308         return SLJIT_SUCCESS;
 1309 #endif /* __ARM_FEATURE_IDIV || __ARM_ARCH_EXT_IDIV__ */
 1310     }
 1311 
 1312     return SLJIT_SUCCESS;
 1313 }
 1314 
 1315 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
 1316     sljit_s32 dst, sljit_sw dstw,
 1317     sljit_s32 src, sljit_sw srcw)
 1318 {
 1319     sljit_s32 dst_r, flags;
 1320     sljit_s32 op_flags = GET_ALL_FLAGS(op);
 1321 
 1322     CHECK_ERROR();
 1323     CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
 1324     ADJUST_LOCAL_OFFSET(dst, dstw);
 1325     ADJUST_LOCAL_OFFSET(src, srcw);
 1326 
 1327     if (dst == SLJIT_UNUSED && !HAS_FLAGS(op)) {
 1328         /* Since TMP_PC has index 15, IS_2_LO_REGS and IS_3_LO_REGS checks always fail. */
 1329         if (op <= SLJIT_MOV_P && (src & SLJIT_MEM))
 1330             return emit_op_mem(compiler, PRELOAD, TMP_PC, src, srcw, TMP_REG1);
 1331         return SLJIT_SUCCESS;
 1332     }
 1333 
 1334     dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG1;
 1335 
 1336     op = GET_OPCODE(op);
 1337     if (op >= SLJIT_MOV && op <= SLJIT_MOV_P) {
 1338         switch (op) {
 1339         case SLJIT_MOV:
 1340         case SLJIT_MOV_U32:
 1341         case SLJIT_MOV_S32:
 1342         case SLJIT_MOV_P:
 1343             flags = WORD_SIZE;
 1344             break;
 1345         case SLJIT_MOV_U8:
 1346             flags = BYTE_SIZE;
 1347             if (src & SLJIT_IMM)
 1348                 srcw = (sljit_u8)srcw;
 1349             break;
 1350         case SLJIT_MOV_S8:
 1351             flags = BYTE_SIZE | SIGNED;
 1352             if (src & SLJIT_IMM)
 1353                 srcw = (sljit_s8)srcw;
 1354             break;
 1355         case SLJIT_MOV_U16:
 1356             flags = HALF_SIZE;
 1357             if (src & SLJIT_IMM)
 1358                 srcw = (sljit_u16)srcw;
 1359             break;
 1360         case SLJIT_MOV_S16:
 1361             flags = HALF_SIZE | SIGNED;
 1362             if (src & SLJIT_IMM)
 1363                 srcw = (sljit_s16)srcw;
 1364             break;
 1365         default:
 1366             SLJIT_UNREACHABLE();
 1367             flags = 0;
 1368             break;
 1369         }
 1370 
 1371         if (src & SLJIT_IMM)
 1372             FAIL_IF(emit_op_imm(compiler, SLJIT_MOV | ARG2_IMM, dst_r, TMP_REG2, srcw));
 1373         else if (src & SLJIT_MEM) {
 1374             FAIL_IF(emit_op_mem(compiler, flags, dst_r, src, srcw, TMP_REG1));
 1375         } else {
 1376             if (dst_r != TMP_REG1)
 1377                 return emit_op_imm(compiler, op, dst_r, TMP_REG2, src);
 1378             dst_r = src;
 1379         }
 1380 
 1381         if (!(dst & SLJIT_MEM))
 1382             return SLJIT_SUCCESS;
 1383 
 1384         return emit_op_mem(compiler, flags | STORE, dst_r, dst, dstw, TMP_REG2);
 1385     }
 1386 
 1387     if (op == SLJIT_NEG) {
 1388 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 1389             || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 1390         compiler->skip_checks = 1;
 1391 #endif
 1392         return sljit_emit_op2(compiler, SLJIT_SUB | op_flags, dst, dstw, SLJIT_IMM, 0, src, srcw);
 1393     }
 1394 
 1395     flags = HAS_FLAGS(op_flags) ? SET_FLAGS : 0;
 1396 
 1397     if (src & SLJIT_MEM) {
 1398         FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
 1399         src = TMP_REG1;
 1400     }
 1401 
 1402     emit_op_imm(compiler, flags | op, dst_r, TMP_REG2, src);
 1403 
 1404     if (SLJIT_UNLIKELY(dst & SLJIT_MEM))
 1405         return emit_op_mem(compiler, flags | STORE, dst_r, dst, dstw, TMP_REG2);
 1406     return SLJIT_SUCCESS;
 1407 }
 1408 
 1409 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
 1410     sljit_s32 dst, sljit_sw dstw,
 1411     sljit_s32 src1, sljit_sw src1w,
 1412     sljit_s32 src2, sljit_sw src2w)
 1413 {
 1414     sljit_s32 dst_reg, flags, src2_reg;
 1415 
 1416     CHECK_ERROR();
 1417     CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
 1418     ADJUST_LOCAL_OFFSET(dst, dstw);
 1419     ADJUST_LOCAL_OFFSET(src1, src1w);
 1420     ADJUST_LOCAL_OFFSET(src2, src2w);
 1421 
 1422     if (dst == SLJIT_UNUSED && !HAS_FLAGS(op))
 1423         return SLJIT_SUCCESS;
 1424 
 1425     dst_reg = SLOW_IS_REG(dst) ? dst : TMP_REG1;
 1426     flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
 1427 
 1428     if (src1 & SLJIT_IMM)
 1429         flags |= ARG1_IMM;
 1430     else if (src1 & SLJIT_MEM) {
 1431         emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src1, src1w, TMP_REG1);
 1432         src1w = TMP_REG1;
 1433     }
 1434     else
 1435         src1w = src1;
 1436 
 1437     if (src2 & SLJIT_IMM)
 1438         flags |= ARG2_IMM;
 1439     else if (src2 & SLJIT_MEM) {
 1440         src2_reg = (!(flags & ARG1_IMM) && (src1w == TMP_REG1)) ? TMP_REG2 : TMP_REG1;
 1441         emit_op_mem(compiler, WORD_SIZE, src2_reg, src2, src2w, src2_reg);
 1442         src2w = src2_reg;
 1443     }
 1444     else
 1445         src2w = src2;
 1446 
 1447     if (dst == SLJIT_UNUSED)
 1448         flags |= UNUSED_RETURN;
 1449 
 1450     emit_op_imm(compiler, flags | GET_OPCODE(op), dst_reg, src1w, src2w);
 1451 
 1452     if (!(dst & SLJIT_MEM))
 1453         return SLJIT_SUCCESS;
 1454     return emit_op_mem(compiler, WORD_SIZE | STORE, dst_reg, dst, dstw, TMP_REG2);
 1455 }
 1456 
 1457 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
 1458 {
 1459     CHECK_REG_INDEX(check_sljit_get_register_index(reg));
 1460     return reg_map[reg];
 1461 }
 1462 
 1463 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
 1464 {
 1465     CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
 1466     return (freg_map[reg] << 1);
 1467 }
 1468 
 1469 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
 1470     void *instruction, sljit_s32 size)
 1471 {
 1472     CHECK_ERROR();
 1473     CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
 1474 
 1475     if (size == 2)
 1476         return push_inst16(compiler, *(sljit_u16*)instruction);
 1477     return push_inst32(compiler, *(sljit_ins*)instruction);
 1478 }
 1479 
 1480 /* --------------------------------------------------------------------- */
 1481 /*  Floating point operators                                             */
 1482 /* --------------------------------------------------------------------- */
 1483 
 1484 #define FPU_LOAD (1 << 20)
 1485 
 1486 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
 1487 {
 1488     sljit_uw imm;
 1489     sljit_sw inst = VSTR_F32 | (flags & (SLJIT_F32_OP | FPU_LOAD));
 1490 
 1491     SLJIT_ASSERT(arg & SLJIT_MEM);
 1492 
 1493     /* Fast loads and stores. */
 1494     if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
 1495         FAIL_IF(push_inst32(compiler, ADD_W | RD4(TMP_REG1) | RN4(arg & REG_MASK) | RM4(OFFS_REG(arg)) | ((argw & 0x3) << 6)));
 1496         arg = SLJIT_MEM | TMP_REG1;
 1497         argw = 0;
 1498     }
 1499 
 1500     if ((arg & REG_MASK) && (argw & 0x3) == 0) {
 1501         if (!(argw & ~0x3fc))
 1502             return push_inst32(compiler, inst | 0x800000 | RN4(arg & REG_MASK) | DD4(reg) | (argw >> 2));
 1503         if (!(-argw & ~0x3fc))
 1504             return push_inst32(compiler, inst | RN4(arg & REG_MASK) | DD4(reg) | (-argw >> 2));
 1505     }
 1506 
 1507     if (arg & REG_MASK) {
 1508         if (emit_set_delta(compiler, TMP_REG1, arg & REG_MASK, argw) != SLJIT_ERR_UNSUPPORTED) {
 1509             FAIL_IF(compiler->error);
 1510             return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg));
 1511         }
 1512         imm = get_imm(argw & ~0x3fc);
 1513         if (imm != INVALID_IMM) {
 1514             FAIL_IF(push_inst32(compiler, ADD_WI | RD4(TMP_REG1) | RN4(arg & REG_MASK) | imm));
 1515             return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg) | ((argw & 0x3fc) >> 2));
 1516         }
 1517         imm = get_imm(-argw & ~0x3fc);
 1518         if (imm != INVALID_IMM) {
 1519             argw = -argw;
 1520             FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(arg & REG_MASK) | imm));
 1521             return push_inst32(compiler, inst | RN4(TMP_REG1) | DD4(reg) | ((argw & 0x3fc) >> 2));
 1522         }
 1523     }
 1524 
 1525     FAIL_IF(load_immediate(compiler, TMP_REG1, argw));
 1526     if (arg & REG_MASK)
 1527         FAIL_IF(push_inst16(compiler, ADD | SET_REGS44(TMP_REG1, (arg & REG_MASK))));
 1528     return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg));
 1529 }
 1530 
 1531 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
 1532     sljit_s32 dst, sljit_sw dstw,
 1533     sljit_s32 src, sljit_sw srcw)
 1534 {
 1535     op ^= SLJIT_F32_OP;
 1536 
 1537     if (src & SLJIT_MEM) {
 1538         FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
 1539         src = TMP_FREG1;
 1540     }
 1541 
 1542     FAIL_IF(push_inst32(compiler, VCVT_S32_F32 | (op & SLJIT_F32_OP) | DD4(TMP_FREG1) | DM4(src)));
 1543 
 1544     if (FAST_IS_REG(dst))
 1545         return push_inst32(compiler, VMOV | (1 << 20) | RT4(dst) | DN4(TMP_FREG1));
 1546 
 1547     /* Store the integer value from a VFP register. */
 1548     return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
 1549 }
 1550 
 1551 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
 1552     sljit_s32 dst, sljit_sw dstw,
 1553     sljit_s32 src, sljit_sw srcw)
 1554 {
 1555     sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
 1556 
 1557     op ^= SLJIT_F32_OP;
 1558 
 1559     if (FAST_IS_REG(src))
 1560         FAIL_IF(push_inst32(compiler, VMOV | RT4(src) | DN4(TMP_FREG1)));
 1561     else if (src & SLJIT_MEM) {
 1562         /* Load the integer value into a VFP register. */
 1563         FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
 1564     }
 1565     else {
 1566         FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
 1567         FAIL_IF(push_inst32(compiler, VMOV | RT4(TMP_REG1) | DN4(TMP_FREG1)));
 1568     }
 1569 
 1570     FAIL_IF(push_inst32(compiler, VCVT_F32_S32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(TMP_FREG1)));
 1571 
 1572     if (dst & SLJIT_MEM)
 1573         return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
 1574     return SLJIT_SUCCESS;
 1575 }
 1576 
 1577 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
 1578     sljit_s32 src1, sljit_sw src1w,
 1579     sljit_s32 src2, sljit_sw src2w)
 1580 {
 1581     op ^= SLJIT_F32_OP;
 1582 
 1583     if (src1 & SLJIT_MEM) {
 1584         emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w);
 1585         src1 = TMP_FREG1;
 1586     }
 1587 
 1588     if (src2 & SLJIT_MEM) {
 1589         emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w);
 1590         src2 = TMP_FREG2;
 1591     }
 1592 
 1593     FAIL_IF(push_inst32(compiler, VCMP_F32 | (op & SLJIT_F32_OP) | DD4(src1) | DM4(src2)));
 1594     return push_inst32(compiler, VMRS);
 1595 }
 1596 
 1597 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
 1598     sljit_s32 dst, sljit_sw dstw,
 1599     sljit_s32 src, sljit_sw srcw)
 1600 {
 1601     sljit_s32 dst_r;
 1602 
 1603     CHECK_ERROR();
 1604 
 1605     SLJIT_COMPILE_ASSERT((SLJIT_F32_OP == 0x100), float_transfer_bit_error);
 1606     SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
 1607 
 1608     dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
 1609 
 1610     if (GET_OPCODE(op) != SLJIT_CONV_F64_FROM_F32)
 1611         op ^= SLJIT_F32_OP;
 1612 
 1613     if (src & SLJIT_MEM) {
 1614         emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, dst_r, src, srcw);
 1615         src = dst_r;
 1616     }
 1617 
 1618     switch (GET_OPCODE(op)) {
 1619     case SLJIT_MOV_F64:
 1620         if (src != dst_r) {
 1621             if (dst_r != TMP_FREG1)
 1622                 FAIL_IF(push_inst32(compiler, VMOV_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
 1623             else
 1624                 dst_r = src;
 1625         }
 1626         break;
 1627     case SLJIT_NEG_F64:
 1628         FAIL_IF(push_inst32(compiler, VNEG_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
 1629         break;
 1630     case SLJIT_ABS_F64:
 1631         FAIL_IF(push_inst32(compiler, VABS_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
 1632         break;
 1633     case SLJIT_CONV_F64_FROM_F32:
 1634         FAIL_IF(push_inst32(compiler, VCVT_F64_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
 1635         op ^= SLJIT_F32_OP;
 1636         break;
 1637     }
 1638 
 1639     if (dst & SLJIT_MEM)
 1640         return emit_fop_mem(compiler, (op & SLJIT_F32_OP), dst_r, dst, dstw);
 1641     return SLJIT_SUCCESS;
 1642 }
 1643 
 1644 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
 1645     sljit_s32 dst, sljit_sw dstw,
 1646     sljit_s32 src1, sljit_sw src1w,
 1647     sljit_s32 src2, sljit_sw src2w)
 1648 {
 1649     sljit_s32 dst_r;
 1650 
 1651     CHECK_ERROR();
 1652     CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
 1653     ADJUST_LOCAL_OFFSET(dst, dstw);
 1654     ADJUST_LOCAL_OFFSET(src1, src1w);
 1655     ADJUST_LOCAL_OFFSET(src2, src2w);
 1656 
 1657     op ^= SLJIT_F32_OP;
 1658 
 1659     dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
 1660     if (src1 & SLJIT_MEM) {
 1661         emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w);
 1662         src1 = TMP_FREG1;
 1663     }
 1664     if (src2 & SLJIT_MEM) {
 1665         emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w);
 1666         src2 = TMP_FREG2;
 1667     }
 1668 
 1669     switch (GET_OPCODE(op)) {
 1670     case SLJIT_ADD_F64:
 1671         FAIL_IF(push_inst32(compiler, VADD_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
 1672         break;
 1673     case SLJIT_SUB_F64:
 1674         FAIL_IF(push_inst32(compiler, VSUB_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
 1675         break;
 1676     case SLJIT_MUL_F64:
 1677         FAIL_IF(push_inst32(compiler, VMUL_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
 1678         break;
 1679     case SLJIT_DIV_F64:
 1680         FAIL_IF(push_inst32(compiler, VDIV_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
 1681         break;
 1682     }
 1683 
 1684     if (!(dst & SLJIT_MEM))
 1685         return SLJIT_SUCCESS;
 1686     return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
 1687 }
 1688 
 1689 #undef FPU_LOAD
 1690 
 1691 /* --------------------------------------------------------------------- */
 1692 /*  Other instructions                                                   */
 1693 /* --------------------------------------------------------------------- */
 1694 
 1695 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
 1696 {
 1697     CHECK_ERROR();
 1698     CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
 1699     ADJUST_LOCAL_OFFSET(dst, dstw);
 1700 
 1701     SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
 1702 
 1703     if (FAST_IS_REG(dst))
 1704         return push_inst16(compiler, MOV | SET_REGS44(dst, TMP_REG2));
 1705 
 1706     /* Memory. */
 1707     return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw, TMP_REG1);
 1708 }
 1709 
 1710 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
 1711 {
 1712     CHECK_ERROR();
 1713     CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
 1714     ADJUST_LOCAL_OFFSET(src, srcw);
 1715 
 1716     SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
 1717 
 1718     if (FAST_IS_REG(src))
 1719         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG2, src)));
 1720     else
 1721         FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, src, srcw, TMP_REG2));
 1722 
 1723     return push_inst16(compiler, BX | RN3(TMP_REG2));
 1724 }
 1725 
 1726 /* --------------------------------------------------------------------- */
 1727 /*  Conditional instructions                                             */
 1728 /* --------------------------------------------------------------------- */
 1729 
 1730 static sljit_uw get_cc(sljit_s32 type)
 1731 {
 1732     switch (type) {
 1733     case SLJIT_EQUAL:
 1734     case SLJIT_MUL_NOT_OVERFLOW:
 1735     case SLJIT_EQUAL_F64:
 1736         return 0x0;
 1737 
 1738     case SLJIT_NOT_EQUAL:
 1739     case SLJIT_MUL_OVERFLOW:
 1740     case SLJIT_NOT_EQUAL_F64:
 1741         return 0x1;
 1742 
 1743     case SLJIT_LESS:
 1744     case SLJIT_LESS_F64:
 1745         return 0x3;
 1746 
 1747     case SLJIT_GREATER_EQUAL:
 1748     case SLJIT_GREATER_EQUAL_F64:
 1749         return 0x2;
 1750 
 1751     case SLJIT_GREATER:
 1752     case SLJIT_GREATER_F64:
 1753         return 0x8;
 1754 
 1755     case SLJIT_LESS_EQUAL:
 1756     case SLJIT_LESS_EQUAL_F64:
 1757         return 0x9;
 1758 
 1759     case SLJIT_SIG_LESS:
 1760         return 0xb;
 1761 
 1762     case SLJIT_SIG_GREATER_EQUAL:
 1763         return 0xa;
 1764 
 1765     case SLJIT_SIG_GREATER:
 1766         return 0xc;
 1767 
 1768     case SLJIT_SIG_LESS_EQUAL:
 1769         return 0xd;
 1770 
 1771     case SLJIT_OVERFLOW:
 1772     case SLJIT_UNORDERED_F64:
 1773         return 0x6;
 1774 
 1775     case SLJIT_NOT_OVERFLOW:
 1776     case SLJIT_ORDERED_F64:
 1777         return 0x7;
 1778 
 1779     default: /* SLJIT_JUMP */
 1780         SLJIT_UNREACHABLE();
 1781         return 0xe;
 1782     }
 1783 }
 1784 
 1785 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
 1786 {
 1787     struct sljit_label *label;
 1788 
 1789     CHECK_ERROR_PTR();
 1790     CHECK_PTR(check_sljit_emit_label(compiler));
 1791 
 1792     if (compiler->last_label && compiler->last_label->size == compiler->size)
 1793         return compiler->last_label;
 1794 
 1795     label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
 1796     PTR_FAIL_IF(!label);
 1797     set_label(label, compiler);
 1798     return label;
 1799 }
 1800 
 1801 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
 1802 {
 1803     struct sljit_jump *jump;
 1804     sljit_ins cc;
 1805 
 1806     CHECK_ERROR_PTR();
 1807     CHECK_PTR(check_sljit_emit_jump(compiler, type));
 1808 
 1809     jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
 1810     PTR_FAIL_IF(!jump);
 1811     set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
 1812     type &= 0xff;
 1813 
 1814     PTR_FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
 1815     if (type < SLJIT_JUMP) {
 1816         jump->flags |= IS_COND;
 1817         cc = get_cc(type);
 1818         jump->flags |= cc << 8;
 1819         PTR_FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
 1820     }
 1821 
 1822     jump->addr = compiler->size;
 1823     if (type <= SLJIT_JUMP)
 1824         PTR_FAIL_IF(push_inst16(compiler, BX | RN3(TMP_REG1)));
 1825     else {
 1826         jump->flags |= IS_BL;
 1827         PTR_FAIL_IF(push_inst16(compiler, BLX | RN3(TMP_REG1)));
 1828     }
 1829 
 1830     return jump;
 1831 }
 1832 
 1833 #ifdef __SOFTFP__
 1834 
 1835 static sljit_s32 softfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src)
 1836 {
 1837     sljit_s32 stack_offset = 0;
 1838     sljit_s32 arg_count = 0;
 1839     sljit_s32 word_arg_offset = 0;
 1840     sljit_s32 float_arg_count = 0;
 1841     sljit_s32 types = 0;
 1842     sljit_s32 src_offset = 4 * sizeof(sljit_sw);
 1843     sljit_u8 offsets[4];
 1844 
 1845     if (src && FAST_IS_REG(*src))
 1846         src_offset = reg_map[*src] * sizeof(sljit_sw);
 1847 
 1848     arg_types >>= SLJIT_DEF_SHIFT;
 1849 
 1850     while (arg_types) {
 1851         types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
 1852 
 1853         switch (arg_types & SLJIT_DEF_MASK) {
 1854         case SLJIT_ARG_TYPE_F32:
 1855             offsets[arg_count] = (sljit_u8)stack_offset;
 1856             stack_offset += sizeof(sljit_f32);
 1857             arg_count++;
 1858             float_arg_count++;
 1859             break;
 1860         case SLJIT_ARG_TYPE_F64:
 1861             if (stack_offset & 0x7)
 1862                 stack_offset += sizeof(sljit_sw);
 1863             offsets[arg_count] = (sljit_u8)stack_offset;
 1864             stack_offset += sizeof(sljit_f64);
 1865             arg_count++;
 1866             float_arg_count++;
 1867             break;
 1868         default:
 1869             offsets[arg_count] = (sljit_u8)stack_offset;
 1870             stack_offset += sizeof(sljit_sw);
 1871             arg_count++;
 1872             word_arg_offset += sizeof(sljit_sw);
 1873             break;
 1874         }
 1875 
 1876         arg_types >>= SLJIT_DEF_SHIFT;
 1877     }
 1878 
 1879     if (stack_offset > 16)
 1880         FAIL_IF(push_inst16(compiler, SUB_SP | (((stack_offset - 16) + 0x7) & ~0x7) >> 2));
 1881 
 1882     SLJIT_ASSERT(reg_map[TMP_REG1] == 12);
 1883 
 1884     /* Process arguments in reversed direction. */
 1885     while (types) {
 1886         switch (types & SLJIT_DEF_MASK) {
 1887         case SLJIT_ARG_TYPE_F32:
 1888             arg_count--;
 1889             float_arg_count--;
 1890             stack_offset = offsets[arg_count];
 1891 
 1892             if (stack_offset < 16) {
 1893                 if (src_offset == stack_offset) {
 1894                     FAIL_IF(push_inst16(compiler, MOV | (src_offset << 1) | 4 | (1 << 7)));
 1895                     *src = TMP_REG1;
 1896                 }
 1897                 FAIL_IF(push_inst32(compiler, VMOV | 0x100000 | (float_arg_count << 16) | (stack_offset << 10)));
 1898             } else
 1899                 FAIL_IF(push_inst32(compiler, VSTR_F32 | 0x800000 | RN4(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
 1900             break;
 1901         case SLJIT_ARG_TYPE_F64:
 1902             arg_count--;
 1903             float_arg_count--;
 1904             stack_offset = offsets[arg_count];
 1905 
 1906             SLJIT_ASSERT((stack_offset & 0x7) == 0);
 1907 
 1908             if (stack_offset < 16) {
 1909                 if (src_offset == stack_offset || src_offset == stack_offset + sizeof(sljit_sw)) {
 1910                     FAIL_IF(push_inst16(compiler, MOV | (src_offset << 1) | 4 | (1 << 7)));
 1911                     *src = TMP_REG1;
 1912                 }
 1913                 FAIL_IF(push_inst32(compiler, VMOV2 | 0x100000 | (stack_offset << 10) | ((stack_offset + sizeof(sljit_sw)) << 14) | float_arg_count));
 1914             } else
 1915                 FAIL_IF(push_inst32(compiler, VSTR_F32 | 0x800100 | RN4(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
 1916             break;
 1917         default:
 1918             arg_count--;
 1919             word_arg_offset -= sizeof(sljit_sw);
 1920             stack_offset = offsets[arg_count];
 1921 
 1922             SLJIT_ASSERT(stack_offset >= word_arg_offset);
 1923 
 1924             if (stack_offset != word_arg_offset) {
 1925                 if (stack_offset < 16) {
 1926                     if (src_offset == stack_offset) {
 1927                         FAIL_IF(push_inst16(compiler, MOV | (src_offset << 1) | 4 | (1 << 7)));
 1928                         *src = TMP_REG1;
 1929                     }
 1930                     else if (src_offset == word_arg_offset) {
 1931                         *src = 1 + (stack_offset >> 2);
 1932                         src_offset = stack_offset;
 1933                     }
 1934                     FAIL_IF(push_inst16(compiler, MOV | (stack_offset >> 2) | (word_arg_offset << 1)));
 1935                 } else
 1936                     FAIL_IF(push_inst16(compiler, STR_SP | (word_arg_offset << 6) | ((stack_offset - 16) >> 2)));
 1937             }
 1938             break;
 1939         }
 1940 
 1941         types >>= SLJIT_DEF_SHIFT;
 1942     }
 1943 
 1944     return SLJIT_SUCCESS;
 1945 }
 1946 
 1947 static sljit_s32 softfloat_post_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
 1948 {
 1949     sljit_s32 stack_size = 0;
 1950 
 1951     if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32)
 1952         FAIL_IF(push_inst32(compiler, VMOV | (0 << 16) | (0 << 12)));
 1953     if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64)
 1954         FAIL_IF(push_inst32(compiler, VMOV2 | (1 << 16) | (0 << 12) | 0));
 1955 
 1956     arg_types >>= SLJIT_DEF_SHIFT;
 1957 
 1958     while (arg_types) {
 1959         switch (arg_types & SLJIT_DEF_MASK) {
 1960         case SLJIT_ARG_TYPE_F32:
 1961             stack_size += sizeof(sljit_f32);
 1962             break;
 1963         case SLJIT_ARG_TYPE_F64:
 1964             if (stack_size & 0x7)
 1965                 stack_size += sizeof(sljit_sw);
 1966             stack_size += sizeof(sljit_f64);
 1967             break;
 1968         default:
 1969             stack_size += sizeof(sljit_sw);
 1970             break;
 1971         }
 1972 
 1973         arg_types >>= SLJIT_DEF_SHIFT;
 1974     }
 1975 
 1976     if (stack_size <= 16)
 1977         return SLJIT_SUCCESS;
 1978 
 1979     return push_inst16(compiler, ADD_SP | ((((stack_size - 16) + 0x7) & ~0x7) >> 2));
 1980 }
 1981 
 1982 #else
 1983 
 1984 static sljit_s32 hardfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
 1985 {
 1986     sljit_u32 remap = 0;
 1987     sljit_u32 offset = 0;
 1988     sljit_u32 new_offset, mask;
 1989 
 1990     /* Remove return value. */
 1991     arg_types >>= SLJIT_DEF_SHIFT;
 1992 
 1993     while (arg_types) {
 1994         if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32) {
 1995             new_offset = 0;
 1996             mask = 1;
 1997 
 1998             while (remap & mask) {
 1999                 new_offset++;
 2000                 mask <<= 1;
 2001             }
 2002             remap |= mask;
 2003 
 2004             if (offset != new_offset)
 2005                 FAIL_IF(push_inst32(compiler, VMOV_F32 | DD4((new_offset >> 1) + 1)
 2006                     | ((new_offset & 0x1) ? 0x400000 : 0) | DM4((offset >> 1) + 1)));
 2007 
 2008             offset += 2;
 2009         }
 2010         else if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64) {
 2011             new_offset = 0;
 2012             mask = 3;
 2013 
 2014             while (remap & mask) {
 2015                 new_offset += 2;
 2016                 mask <<= 2;
 2017             }
 2018             remap |= mask;
 2019 
 2020             if (offset != new_offset)
 2021                 FAIL_IF(push_inst32(compiler, VMOV_F32 | SLJIT_F32_OP | DD4((new_offset >> 1) + 1) | DM4((offset >> 1) + 1)));
 2022 
 2023             offset += 2;
 2024         }
 2025         arg_types >>= SLJIT_DEF_SHIFT;
 2026     }
 2027 
 2028     return SLJIT_SUCCESS;
 2029 }
 2030 
 2031 #endif
 2032 
 2033 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
 2034     sljit_s32 arg_types)
 2035 {
 2036 #ifdef __SOFTFP__
 2037     struct sljit_jump *jump;
 2038 #endif
 2039 
 2040     CHECK_ERROR_PTR();
 2041     CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
 2042 
 2043 #ifdef __SOFTFP__
 2044     PTR_FAIL_IF(softfloat_call_with_args(compiler, arg_types, NULL));
 2045 
 2046 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 2047         || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 2048     compiler->skip_checks = 1;
 2049 #endif
 2050 
 2051     jump = sljit_emit_jump(compiler, type);
 2052     PTR_FAIL_IF(jump == NULL);
 2053 
 2054     PTR_FAIL_IF(softfloat_post_call_with_args(compiler, arg_types));
 2055     return jump;
 2056 #else
 2057     PTR_FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
 2058 
 2059 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 2060         || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 2061     compiler->skip_checks = 1;
 2062 #endif
 2063 
 2064     return sljit_emit_jump(compiler, type);
 2065 #endif
 2066 }
 2067 
 2068 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
 2069 {
 2070     struct sljit_jump *jump;
 2071 
 2072     CHECK_ERROR();
 2073     CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
 2074     ADJUST_LOCAL_OFFSET(src, srcw);
 2075 
 2076     SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
 2077 
 2078     if (!(src & SLJIT_IMM)) {
 2079         if (FAST_IS_REG(src)) {
 2080             SLJIT_ASSERT(reg_map[src] != 14);
 2081             return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(src));
 2082         }
 2083 
 2084         FAIL_IF(emit_op_mem(compiler, WORD_SIZE, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, src, srcw, TMP_REG1));
 2085         if (type >= SLJIT_FAST_CALL)
 2086             return push_inst16(compiler, BLX | RN3(TMP_REG1));
 2087     }
 2088 
 2089     /* These jumps are converted to jump/call instructions when possible. */
 2090     jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
 2091     FAIL_IF(!jump);
 2092     set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
 2093     jump->u.target = srcw;
 2094 
 2095     FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
 2096     jump->addr = compiler->size;
 2097     return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(TMP_REG1));
 2098 }
 2099 
 2100 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
 2101     sljit_s32 arg_types,
 2102     sljit_s32 src, sljit_sw srcw)
 2103 {
 2104     CHECK_ERROR();
 2105     CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
 2106 
 2107 #ifdef __SOFTFP__
 2108     if (src & SLJIT_MEM) {
 2109         FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
 2110         src = TMP_REG1;
 2111     }
 2112 
 2113     FAIL_IF(softfloat_call_with_args(compiler, arg_types, &src));
 2114 
 2115 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 2116         || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 2117     compiler->skip_checks = 1;
 2118 #endif
 2119 
 2120     FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
 2121 
 2122     return softfloat_post_call_with_args(compiler, arg_types);
 2123 #else /* !__SOFTFP__ */
 2124     FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
 2125 
 2126 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 2127         || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 2128     compiler->skip_checks = 1;
 2129 #endif
 2130 
 2131     return sljit_emit_ijump(compiler, type, src, srcw);
 2132 #endif /* __SOFTFP__ */
 2133 }
 2134 
 2135 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
 2136     sljit_s32 dst, sljit_sw dstw,
 2137     sljit_s32 type)
 2138 {
 2139     sljit_s32 dst_r, flags = GET_ALL_FLAGS(op);
 2140     sljit_ins cc;
 2141 
 2142     CHECK_ERROR();
 2143     CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, type));
 2144     ADJUST_LOCAL_OFFSET(dst, dstw);
 2145 
 2146     op = GET_OPCODE(op);
 2147     cc = get_cc(type & 0xff);
 2148     dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
 2149 
 2150     if (op < SLJIT_ADD) {
 2151         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
 2152         if (reg_map[dst_r] > 7) {
 2153             FAIL_IF(push_inst32(compiler, MOV_WI | RD4(dst_r) | 1));
 2154             FAIL_IF(push_inst32(compiler, MOV_WI | RD4(dst_r) | 0));
 2155         } else {
 2156             /* The movsi (immediate) instruction does not set flags in IT block. */
 2157             FAIL_IF(push_inst16(compiler, MOVSI | RDN3(dst_r) | 1));
 2158             FAIL_IF(push_inst16(compiler, MOVSI | RDN3(dst_r) | 0));
 2159         }
 2160         if (!(dst & SLJIT_MEM))
 2161             return SLJIT_SUCCESS;
 2162         return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG1, dst, dstw, TMP_REG2);
 2163     }
 2164 
 2165     if (dst & SLJIT_MEM)
 2166         FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2));
 2167 
 2168     if (op == SLJIT_AND) {
 2169         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
 2170         FAIL_IF(push_inst32(compiler, ANDI | RN4(dst_r) | RD4(dst_r) | 1));
 2171         FAIL_IF(push_inst32(compiler, ANDI | RN4(dst_r) | RD4(dst_r) | 0));
 2172     }
 2173     else {
 2174         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
 2175         FAIL_IF(push_inst32(compiler, ((op == SLJIT_OR) ? ORRI : EORI) | RN4(dst_r) | RD4(dst_r) | 1));
 2176     }
 2177 
 2178     if (dst & SLJIT_MEM)
 2179         FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG1, dst, dstw, TMP_REG2));
 2180 
 2181     if (!(flags & SLJIT_SET_Z))
 2182         return SLJIT_SUCCESS;
 2183 
 2184     /* The condition must always be set, even if the ORR/EORI is not executed above. */
 2185     return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(TMP_REG1) | RM4(dst_r));
 2186 }
 2187 
 2188 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type,
 2189     sljit_s32 dst_reg,
 2190     sljit_s32 src, sljit_sw srcw)
 2191 {
 2192     sljit_uw cc, tmp;
 2193 
 2194     CHECK_ERROR();
 2195     CHECK(check_sljit_emit_cmov(compiler, type, dst_reg, src, srcw));
 2196 
 2197     dst_reg &= ~SLJIT_I32_OP;
 2198 
 2199     cc = get_cc(type & 0xff);
 2200 
 2201     if (!(src & SLJIT_IMM)) {
 2202         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
 2203         return push_inst16(compiler, MOV | SET_REGS44(dst_reg, src));
 2204     }
 2205 
 2206     tmp = (sljit_uw) srcw;
 2207 
 2208     if (tmp < 0x10000) {
 2209         /* set low 16 bits, set hi 16 bits to 0. */
 2210         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
 2211         return push_inst32(compiler, MOVW | RD4(dst_reg)
 2212             | COPY_BITS(tmp, 12, 16, 4) | COPY_BITS(tmp, 11, 26, 1) | COPY_BITS(tmp, 8, 12, 3) | (tmp & 0xff));
 2213     }
 2214 
 2215     tmp = get_imm(srcw);
 2216     if (tmp != INVALID_IMM) {
 2217         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
 2218         return push_inst32(compiler, MOV_WI | RD4(dst_reg) | tmp);
 2219     }
 2220 
 2221     tmp = get_imm(~srcw);
 2222     if (tmp != INVALID_IMM) {
 2223         FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
 2224         return push_inst32(compiler, MVN_WI | RD4(dst_reg) | tmp);
 2225     }
 2226 
 2227     FAIL_IF(push_inst16(compiler, IT | (cc << 4) | ((cc & 0x1) << 3) | 0x4));
 2228 
 2229     tmp = (sljit_uw) srcw;
 2230     FAIL_IF(push_inst32(compiler, MOVW | RD4(dst_reg)
 2231         | COPY_BITS(tmp, 12, 16, 4) | COPY_BITS(tmp, 11, 26, 1) | COPY_BITS(tmp, 8, 12, 3) | (tmp & 0xff)));
 2232     return push_inst32(compiler, MOVT | RD4(dst_reg)
 2233         | COPY_BITS(tmp, 12 + 16, 16, 4) | COPY_BITS(tmp, 11 + 16, 26, 1) | COPY_BITS(tmp, 8 + 16, 12, 3) | ((tmp & 0xff0000) >> 16));
 2234 }
 2235 
 2236 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type,
 2237     sljit_s32 reg,
 2238     sljit_s32 mem, sljit_sw memw)
 2239 {
 2240     sljit_s32 flags;
 2241     sljit_ins inst;
 2242 
 2243     CHECK_ERROR();
 2244     CHECK(check_sljit_emit_mem(compiler, type, reg, mem, memw));
 2245 
 2246     if ((mem & OFFS_REG_MASK) || (memw > 255 && memw < -255))
 2247         return SLJIT_ERR_UNSUPPORTED;
 2248 
 2249     if (type & SLJIT_MEM_SUPP)
 2250         return SLJIT_SUCCESS;
 2251 
 2252     switch (type & 0xff) {
 2253     case SLJIT_MOV:
 2254     case SLJIT_MOV_U32:
 2255     case SLJIT_MOV_S32:
 2256     case SLJIT_MOV_P:
 2257         flags = WORD_SIZE;
 2258         break;
 2259     case SLJIT_MOV_U8:
 2260         flags = BYTE_SIZE;
 2261         break;
 2262     case SLJIT_MOV_S8:
 2263         flags = BYTE_SIZE | SIGNED;
 2264         break;
 2265     case SLJIT_MOV_U16:
 2266         flags = HALF_SIZE;
 2267         break;
 2268     case SLJIT_MOV_S16:
 2269         flags = HALF_SIZE | SIGNED;
 2270         break;
 2271     default:
 2272         SLJIT_UNREACHABLE();
 2273         flags = WORD_SIZE;
 2274         break;
 2275     }
 2276 
 2277     if (type & SLJIT_MEM_STORE)
 2278         flags |= STORE;
 2279 
 2280     inst = sljit_mem32[flags] | 0x900;
 2281 
 2282     if (type & SLJIT_MEM_PRE)
 2283         inst |= 0x400;
 2284 
 2285     if (memw >= 0)
 2286         inst |= 0x200;
 2287     else
 2288         memw = -memw;
 2289 
 2290     return push_inst32(compiler, inst | RT4(reg) | RN4(mem & REG_MASK) | memw);
 2291 }
 2292 
 2293 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
 2294 {
 2295     struct sljit_const *const_;
 2296     sljit_s32 dst_r;
 2297 
 2298     CHECK_ERROR_PTR();
 2299     CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
 2300     ADJUST_LOCAL_OFFSET(dst, dstw);
 2301 
 2302     const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
 2303     PTR_FAIL_IF(!const_);
 2304     set_const(const_, compiler);
 2305 
 2306     dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
 2307     PTR_FAIL_IF(emit_imm32_const(compiler, dst_r, init_value));
 2308 
 2309     if (dst & SLJIT_MEM)
 2310         PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, dst_r, dst, dstw, TMP_REG2));
 2311     return const_;
 2312 }
 2313 
 2314 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
 2315 {
 2316     sljit_u16 *inst = (sljit_u16*)addr;
 2317     modify_imm32_const(inst, new_target);
 2318     inst = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
 2319     SLJIT_CACHE_FLUSH(inst, inst + 4);
 2320 }
 2321 
 2322 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
 2323 {
 2324     sljit_u16 *inst = (sljit_u16*)addr;
 2325     modify_imm32_const(inst, new_constant);
 2326     inst = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
 2327     SLJIT_CACHE_FLUSH(inst, inst + 4);
 2328 }