sljit/sljitNativePPC_32.c

   1 /*
   2  *    Stack-less Just-In-Time compiler
   3  *
   4  *    Copyright 2009-2012 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 /* ppc 32-bit arch dependent functions. */
  28
  29 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm)
  30 {
  31         if (imm <= SIMM_MAX && imm >= SIMM_MIN)
  32                 return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm));
  33
  34         if (!(imm & ~0xffff))
  35                 return push_inst(compiler, ORI | S(TMP_ZERO) | A(reg) | IMM(imm));
  36
  37         FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16)));
  38         return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS;
  39 }
  40
  41 #define INS_CLEAR_LEFT(dst, src, from) \
  42         (RLWINM | S(src) | A(dst) | ((from) << 6) | (31 << 1))
  43
  44 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
  45         sljit_s32 dst, sljit_s32 src1, sljit_s32 src2)
  46 {
  47         switch (op) {
  48         case SLJIT_MOV:
  49         case SLJIT_MOV_U32:
  50         case SLJIT_MOV_S32:
  51         case SLJIT_MOV_P:
  52                 SLJIT_ASSERT(src1 == TMP_REG1);
  53                 if (dst != src2)
  54                         return push_inst(compiler, OR | S(src2) | A(dst) | B(src2));
  55                 return SLJIT_SUCCESS;
  56
  57         case SLJIT_MOV_U8:
  58         case SLJIT_MOV_S8:
  59                 SLJIT_ASSERT(src1 == TMP_REG1);
  60                 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
  61                         if (op == SLJIT_MOV_S8)
  62                                 return push_inst(compiler, EXTSB | S(src2) | A(dst));
  63                         return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24));
  64                 }
  65                 else if ((flags & REG_DEST) && op == SLJIT_MOV_S8)
  66                         return push_inst(compiler, EXTSB | S(src2) | A(dst));
  67                 else {
  68                         SLJIT_ASSERT(dst == src2);
  69                 }
  70                 return SLJIT_SUCCESS;
  71
  72         case SLJIT_MOV_U16:
  73         case SLJIT_MOV_S16:
  74                 SLJIT_ASSERT(src1 == TMP_REG1);
  75                 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
  76                         if (op == SLJIT_MOV_S16)
  77                                 return push_inst(compiler, EXTSH | S(src2) | A(dst));
  78                         return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16));
  79                 }
  80                 else {
  81                         SLJIT_ASSERT(dst == src2);
  82                 }
  83                 return SLJIT_SUCCESS;
  84
  85         case SLJIT_NOT:
  86                 SLJIT_ASSERT(src1 == TMP_REG1);
  87                 return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2));
  88
  89         case SLJIT_NEG:
  90                 SLJIT_ASSERT(src1 == TMP_REG1);
  91                 return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2));
  92
  93         case SLJIT_CLZ:
  94                 SLJIT_ASSERT(src1 == TMP_REG1);
  95                 return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst));
  96
  97         case SLJIT_ADD:
  98                 if (flags & ALT_FORM1) {
  99                         /* Flags does not set: BIN_IMM_EXTS unnecessary. */
 100                         SLJIT_ASSERT(src2 == TMP_REG2);
 101                         return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm);
 102                 }
 103                 if (flags & ALT_FORM2) {
 104                         /* Flags does not set: BIN_IMM_EXTS unnecessary. */
 105                         SLJIT_ASSERT(src2 == TMP_REG2);
 106                         return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm);
 107                 }
 108                 if (flags & ALT_FORM3) {
 109                         SLJIT_ASSERT(src2 == TMP_REG2);
 110                         return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm);
 111                 }
 112                 if (flags & ALT_FORM4) {
 113                         /* Flags does not set: BIN_IMM_EXTS unnecessary. */
 114                         FAIL_IF(push_inst(compiler, ADDI | D(dst) | A(src1) | (compiler->imm & 0xffff)));
 115                         return push_inst(compiler, ADDIS | D(dst) | A(dst) | (((compiler->imm >> 16) & 0xffff) + ((compiler->imm >> 15) & 0x1)));
 116                 }
 117                 if (!(flags & ALT_SET_FLAGS))
 118                         return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2));
 119                 return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2));
 120
 121         case SLJIT_ADDC:
 122                 if (flags & ALT_FORM1) {
 123                         FAIL_IF(push_inst(compiler, MFXER | D(0)));
 124                         FAIL_IF(push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)));
 125                         return push_inst(compiler, MTXER | S(0));
 126                 }
 127                 return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2));
 128
 129         case SLJIT_SUB:
 130                 if (flags & ALT_FORM1) {
 131                         /* Flags does not set: BIN_IMM_EXTS unnecessary. */
 132                         SLJIT_ASSERT(src2 == TMP_REG2);
 133                         return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm);
 134                 }
 135                 if (flags & (ALT_FORM2 | ALT_FORM3)) {
 136                         SLJIT_ASSERT(src2 == TMP_REG2);
 137                         if (flags & ALT_FORM2)
 138                                 FAIL_IF(push_inst(compiler, CMPI | CRD(0) | A(src1) | compiler->imm));
 139                         if (flags & ALT_FORM3)
 140                                 return push_inst(compiler, CMPLI | CRD(4) | A(src1) | compiler->imm);
 141                         return SLJIT_SUCCESS;
 142                 }
 143                 if (flags & (ALT_FORM4 | ALT_FORM5)) {
 144                         if (flags & ALT_FORM4)
 145                                 FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
 146                         if (flags & ALT_FORM5)
 147                                 FAIL_IF(push_inst(compiler, CMP | CRD(0) | A(src1) | B(src2)));
 148                         return SLJIT_SUCCESS;
 149                 }
 150                 if (!(flags & ALT_SET_FLAGS))
 151                         return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1));
 152                 if (flags & ALT_FORM6)
 153                         FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
 154                 return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1));
 155
 156         case SLJIT_SUBC:
 157                 if (flags & ALT_FORM1) {
 158                         FAIL_IF(push_inst(compiler, MFXER | D(0)));
 159                         FAIL_IF(push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)));
 160                         return push_inst(compiler, MTXER | S(0));
 161                 }
 162                 return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1));
 163
 164         case SLJIT_MUL:
 165                 if (flags & ALT_FORM1) {
 166                         SLJIT_ASSERT(src2 == TMP_REG2);
 167                         return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm);
 168                 }
 169                 return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1));
 170
 171         case SLJIT_AND:
 172                 if (flags & ALT_FORM1) {
 173                         SLJIT_ASSERT(src2 == TMP_REG2);
 174                         return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm);
 175                 }
 176                 if (flags & ALT_FORM2) {
 177                         SLJIT_ASSERT(src2 == TMP_REG2);
 178                         return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm);
 179                 }
 180                 return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2));
 181
 182         case SLJIT_OR:
 183                 if (flags & ALT_FORM1) {
 184                         SLJIT_ASSERT(src2 == TMP_REG2);
 185                         return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm);
 186                 }
 187                 if (flags & ALT_FORM2) {
 188                         SLJIT_ASSERT(src2 == TMP_REG2);
 189                         return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm);
 190                 }
 191                 if (flags & ALT_FORM3) {
 192                         SLJIT_ASSERT(src2 == TMP_REG2);
 193                         FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm)));
 194                         return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
 195                 }
 196                 return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2));
 197
 198         case SLJIT_XOR:
 199                 if (flags & ALT_FORM1) {
 200                         SLJIT_ASSERT(src2 == TMP_REG2);
 201                         return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm);
 202                 }
 203                 if (flags & ALT_FORM2) {
 204                         SLJIT_ASSERT(src2 == TMP_REG2);
 205                         return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm);
 206                 }
 207                 if (flags & ALT_FORM3) {
 208                         SLJIT_ASSERT(src2 == TMP_REG2);
 209                         FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm)));
 210                         return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
 211                 }
 212                 return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2));
 213
 214         case SLJIT_SHL:
 215                 if (flags & ALT_FORM1) {
 216                         SLJIT_ASSERT(src2 == TMP_REG2);
 217                         compiler->imm &= 0x1f;
 218                         return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1));
 219                 }
 220                 return push_inst(compiler, SLW | RC(flags) | S(src1) | A(dst) | B(src2));
 221
 222         case SLJIT_LSHR:
 223                 if (flags & ALT_FORM1) {
 224                         SLJIT_ASSERT(src2 == TMP_REG2);
 225                         compiler->imm &= 0x1f;
 226                         return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1));
 227                 }
 228                 return push_inst(compiler, SRW | RC(flags) | S(src1) | A(dst) | B(src2));
 229
 230         case SLJIT_ASHR:
 231                 if (flags & ALT_FORM3)
 232                         FAIL_IF(push_inst(compiler, MFXER | D(0)));
 233                 if (flags & ALT_FORM1) {
 234                         SLJIT_ASSERT(src2 == TMP_REG2);
 235                         compiler->imm &= 0x1f;
 236                         FAIL_IF(push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11)));
 237                 }
 238                 else
 239                         FAIL_IF(push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2)));
 240                 return (flags & ALT_FORM3) ? push_inst(compiler, MTXER | S(0)) : SLJIT_SUCCESS;
 241         }
 242
 243         SLJIT_ASSERT_STOP();
 244         return SLJIT_SUCCESS;
 245 }
 246
 247 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw init_value)
 248 {
 249         FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 16)));
 250         return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value));
 251 }
 252
 253 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
 254 {
 255         sljit_ins *inst = (sljit_ins*)addr;
 256
 257         inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff);
 258         inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff);
 259         SLJIT_CACHE_FLUSH(inst, inst + 2);
 260 }
 261
 262 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
 263 {
 264         sljit_ins *inst = (sljit_ins*)addr;
 265
 266         inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
 267         inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
 268         SLJIT_CACHE_FLUSH(inst, inst + 2);
 269 }