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