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