1 /* 2 * Stack-less Just-In-Time compiler 3 * 4 * Copyright 2009-2012 Zoltan Herczeg (hzmester (at) 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 64-bit arch dependent functions. */ 28 29 #if defined(__GNUC__) || (defined(__IBM_GCC_ASM) && __IBM_GCC_ASM) 30 #define ASM_SLJIT_CLZ(src, dst) \ 31 __asm__ volatile ( "cntlzd %0, %1" : "=r"(dst) : "r"(src) ) 32 #elif defined(__xlc__) 33 #error "Please enable GCC syntax for inline assembly statements" 34 #else 35 #error "Must implement count leading zeroes" 36 #endif 37 38 #define RLDI(dst, src, sh, mb, type) \ 39 (HI(30) | S(src) | A(dst) | ((type) << 2) | (((sh) & 0x1f) << 11) | (((sh) & 0x20) >> 4) | (((mb) & 0x1f) << 6) | ((mb) & 0x20)) 40 41 #define PUSH_RLDICR(reg, shift) \ 42 push_inst(compiler, RLDI(reg, reg, 63 - shift, shift, 1)) 43 44 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm) 45 { 46 sljit_uw tmp; 47 sljit_uw shift; 48 sljit_uw tmp2; 49 sljit_uw shift2; 50 51 if (imm <= SIMM_MAX && imm >= SIMM_MIN) 52 return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm)); 53 54 if (!(imm & ~0xffff)) 55 return push_inst(compiler, ORI | S(TMP_ZERO) | A(reg) | IMM(imm)); 56 57 if (imm <= 0x7fffffffl && imm >= -0x80000000l) { 58 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16))); 59 return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS; 60 } 61 62 /* Count leading zeroes. */ 63 tmp = (imm >= 0) ? imm : ~imm; 64 ASM_SLJIT_CLZ(tmp, shift); 65 SLJIT_ASSERT(shift > 0); 66 shift--; 67 tmp = (imm << shift); 68 69 if ((tmp & ~0xffff000000000000ul) == 0) { 70 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 71 shift += 15; 72 return PUSH_RLDICR(reg, shift); 73 } 74 75 if ((tmp & ~0xffffffff00000000ul) == 0) { 76 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(tmp >> 48))); 77 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | IMM(tmp >> 32))); 78 shift += 31; 79 return PUSH_RLDICR(reg, shift); 80 } 81 82 /* Cut out the 16 bit from immediate. */ 83 shift += 15; 84 tmp2 = imm & ((1ul << (63 - shift)) - 1); 85 86 if (tmp2 <= 0xffff) { 87 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 88 FAIL_IF(PUSH_RLDICR(reg, shift)); 89 return push_inst(compiler, ORI | S(reg) | A(reg) | tmp2); 90 } 91 92 if (tmp2 <= 0xffffffff) { 93 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 94 FAIL_IF(PUSH_RLDICR(reg, shift)); 95 FAIL_IF(push_inst(compiler, ORIS | S(reg) | A(reg) | (tmp2 >> 16))); 96 return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(tmp2)) : SLJIT_SUCCESS; 97 } 98 99 ASM_SLJIT_CLZ(tmp2, shift2); 100 tmp2 <<= shift2; 101 102 if ((tmp2 & ~0xffff000000000000ul) == 0) { 103 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 104 shift2 += 15; 105 shift += (63 - shift2); 106 FAIL_IF(PUSH_RLDICR(reg, shift)); 107 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | (tmp2 >> 48))); 108 return PUSH_RLDICR(reg, shift2); 109 } 110 111 /* The general version. */ 112 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 48))); 113 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm >> 32))); 114 FAIL_IF(PUSH_RLDICR(reg, 31)); 115 FAIL_IF(push_inst(compiler, ORIS | S(reg) | A(reg) | IMM(imm >> 16))); 116 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)); 117 } 118 119 /* Simplified mnemonics: clrldi. */ 120 #define INS_CLEAR_LEFT(dst, src, from) \ 121 (RLDICL | S(src) | A(dst) | ((from) << 6) | (1 << 5)) 122 123 /* Sign extension for integer operations. */ 124 #define UN_EXTS() \ 125 if ((flags & (ALT_SIGN_EXT | REG2_SOURCE)) == (ALT_SIGN_EXT | REG2_SOURCE)) { \ 126 FAIL_IF(push_inst(compiler, EXTSW | S(src2) | A(TMP_REG2))); \ 127 src2 = TMP_REG2; \ 128 } 129 130 #define BIN_EXTS() \ 131 if (flags & ALT_SIGN_EXT) { \ 132 if (flags & REG1_SOURCE) { \ 133 FAIL_IF(push_inst(compiler, EXTSW | S(src1) | A(TMP_REG1))); \ 134 src1 = TMP_REG1; \ 135 } \ 136 if (flags & REG2_SOURCE) { \ 137 FAIL_IF(push_inst(compiler, EXTSW | S(src2) | A(TMP_REG2))); \ 138 src2 = TMP_REG2; \ 139 } \ 140 } 141 142 #define BIN_IMM_EXTS() \ 143 if ((flags & (ALT_SIGN_EXT | REG1_SOURCE)) == (ALT_SIGN_EXT | REG1_SOURCE)) { \ 144 FAIL_IF(push_inst(compiler, EXTSW | S(src1) | A(TMP_REG1))); \ 145 src1 = TMP_REG1; \ 146 } 147 148 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags, 149 sljit_s32 dst, sljit_s32 src1, sljit_s32 src2) 150 { 151 switch (op) { 152 case SLJIT_MOV: 153 case SLJIT_MOV_P: 154 SLJIT_ASSERT(src1 == TMP_REG1); 155 if (dst != src2) 156 return push_inst(compiler, OR | S(src2) | A(dst) | B(src2)); 157 return SLJIT_SUCCESS; 158 159 case SLJIT_MOV_U32: 160 case SLJIT_MOV_S32: 161 SLJIT_ASSERT(src1 == TMP_REG1); 162 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { 163 if (op == SLJIT_MOV_S32) 164 return push_inst(compiler, EXTSW | S(src2) | A(dst)); 165 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 0)); 166 } 167 else { 168 SLJIT_ASSERT(dst == src2); 169 } 170 return SLJIT_SUCCESS; 171 172 case SLJIT_MOV_U8: 173 case SLJIT_MOV_S8: 174 SLJIT_ASSERT(src1 == TMP_REG1); 175 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { 176 if (op == SLJIT_MOV_S8) 177 return push_inst(compiler, EXTSB | S(src2) | A(dst)); 178 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24)); 179 } 180 else if ((flags & REG_DEST) && op == SLJIT_MOV_S8) 181 return push_inst(compiler, EXTSB | S(src2) | A(dst)); 182 else { 183 SLJIT_ASSERT(dst == src2); 184 } 185 return SLJIT_SUCCESS; 186 187 case SLJIT_MOV_U16: 188 case SLJIT_MOV_S16: 189 SLJIT_ASSERT(src1 == TMP_REG1); 190 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { 191 if (op == SLJIT_MOV_S16) 192 return push_inst(compiler, EXTSH | S(src2) | A(dst)); 193 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16)); 194 } 195 else { 196 SLJIT_ASSERT(dst == src2); 197 } 198 return SLJIT_SUCCESS; 199 200 case SLJIT_NOT: 201 SLJIT_ASSERT(src1 == TMP_REG1); 202 UN_EXTS(); 203 return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2)); 204 205 case SLJIT_NEG: 206 SLJIT_ASSERT(src1 == TMP_REG1); 207 UN_EXTS(); 208 return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2)); 209 210 case SLJIT_CLZ: 211 SLJIT_ASSERT(src1 == TMP_REG1); 212 if (flags & ALT_FORM1) 213 return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst)); 214 return push_inst(compiler, CNTLZD | RC(flags) | S(src2) | A(dst)); 215 216 case SLJIT_ADD: 217 if (flags & ALT_FORM1) { 218 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 219 SLJIT_ASSERT(src2 == TMP_REG2); 220 return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm); 221 } 222 if (flags & ALT_FORM2) { 223 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 224 SLJIT_ASSERT(src2 == TMP_REG2); 225 return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm); 226 } 227 if (flags & ALT_FORM3) { 228 SLJIT_ASSERT(src2 == TMP_REG2); 229 BIN_IMM_EXTS(); 230 return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm); 231 } 232 if (flags & ALT_FORM4) { 233 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 234 FAIL_IF(push_inst(compiler, ADDI | D(dst) | A(src1) | (compiler->imm & 0xffff))); 235 return push_inst(compiler, ADDIS | D(dst) | A(dst) | (((compiler->imm >> 16) & 0xffff) + ((compiler->imm >> 15) & 0x1))); 236 } 237 if (!(flags & ALT_SET_FLAGS)) 238 return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2)); 239 BIN_EXTS(); 240 return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2)); 241 242 case SLJIT_ADDC: 243 if (flags & ALT_FORM1) { 244 FAIL_IF(push_inst(compiler, MFXER | D(0))); 245 FAIL_IF(push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2))); 246 return push_inst(compiler, MTXER | S(0)); 247 } 248 BIN_EXTS(); 249 return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)); 250 251 case SLJIT_SUB: 252 if (flags & ALT_FORM1) { 253 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 254 SLJIT_ASSERT(src2 == TMP_REG2); 255 return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm); 256 } 257 if (flags & (ALT_FORM2 | ALT_FORM3)) { 258 SLJIT_ASSERT(src2 == TMP_REG2); 259 if (flags & ALT_FORM2) 260 FAIL_IF(push_inst(compiler, CMPI | CRD(0 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | compiler->imm)); 261 if (flags & ALT_FORM3) 262 return push_inst(compiler, CMPLI | CRD(4 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | compiler->imm); 263 return SLJIT_SUCCESS; 264 } 265 if (flags & (ALT_FORM4 | ALT_FORM5)) { 266 if (flags & ALT_FORM4) 267 FAIL_IF(push_inst(compiler, CMPL | CRD(4 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | B(src2))); 268 if (flags & ALT_FORM5) 269 return push_inst(compiler, CMP | CRD(0 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | B(src2)); 270 return SLJIT_SUCCESS; 271 } 272 if (!(flags & ALT_SET_FLAGS)) 273 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); 274 BIN_EXTS(); 275 if (flags & ALT_FORM6) 276 FAIL_IF(push_inst(compiler, CMPL | CRD(4 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | B(src2))); 277 return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1)); 278 279 case SLJIT_SUBC: 280 if (flags & ALT_FORM1) { 281 FAIL_IF(push_inst(compiler, MFXER | D(0))); 282 FAIL_IF(push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1))); 283 return push_inst(compiler, MTXER | S(0)); 284 } 285 BIN_EXTS(); 286 return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)); 287 288 case SLJIT_MUL: 289 if (flags & ALT_FORM1) { 290 SLJIT_ASSERT(src2 == TMP_REG2); 291 return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm); 292 } 293 BIN_EXTS(); 294 if (flags & ALT_FORM2) 295 return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1)); 296 return push_inst(compiler, MULLD | OERC(flags) | D(dst) | A(src2) | B(src1)); 297 298 case SLJIT_AND: 299 if (flags & ALT_FORM1) { 300 SLJIT_ASSERT(src2 == TMP_REG2); 301 return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm); 302 } 303 if (flags & ALT_FORM2) { 304 SLJIT_ASSERT(src2 == TMP_REG2); 305 return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm); 306 } 307 return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2)); 308 309 case SLJIT_OR: 310 if (flags & ALT_FORM1) { 311 SLJIT_ASSERT(src2 == TMP_REG2); 312 return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm); 313 } 314 if (flags & ALT_FORM2) { 315 SLJIT_ASSERT(src2 == TMP_REG2); 316 return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm); 317 } 318 if (flags & ALT_FORM3) { 319 SLJIT_ASSERT(src2 == TMP_REG2); 320 FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm))); 321 return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); 322 } 323 return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2)); 324 325 case SLJIT_XOR: 326 if (flags & ALT_FORM1) { 327 SLJIT_ASSERT(src2 == TMP_REG2); 328 return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm); 329 } 330 if (flags & ALT_FORM2) { 331 SLJIT_ASSERT(src2 == TMP_REG2); 332 return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm); 333 } 334 if (flags & ALT_FORM3) { 335 SLJIT_ASSERT(src2 == TMP_REG2); 336 FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm))); 337 return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); 338 } 339 return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2)); 340 341 case SLJIT_SHL: 342 if (flags & ALT_FORM1) { 343 SLJIT_ASSERT(src2 == TMP_REG2); 344 if (flags & ALT_FORM2) { 345 compiler->imm &= 0x1f; 346 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1)); 347 } 348 else { 349 compiler->imm &= 0x3f; 350 return push_inst(compiler, RLDI(dst, src1, compiler->imm, 63 - compiler->imm, 1) | RC(flags)); 351 } 352 } 353 return push_inst(compiler, ((flags & ALT_FORM2) ? SLW : SLD) | RC(flags) | S(src1) | A(dst) | B(src2)); 354 355 case SLJIT_LSHR: 356 if (flags & ALT_FORM1) { 357 SLJIT_ASSERT(src2 == TMP_REG2); 358 if (flags & ALT_FORM2) { 359 compiler->imm &= 0x1f; 360 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1)); 361 } 362 else { 363 compiler->imm &= 0x3f; 364 return push_inst(compiler, RLDI(dst, src1, 64 - compiler->imm, compiler->imm, 0) | RC(flags)); 365 } 366 } 367 return push_inst(compiler, ((flags & ALT_FORM2) ? SRW : SRD) | RC(flags) | S(src1) | A(dst) | B(src2)); 368 369 case SLJIT_ASHR: 370 if (flags & ALT_FORM3) 371 FAIL_IF(push_inst(compiler, MFXER | D(0))); 372 if (flags & ALT_FORM1) { 373 SLJIT_ASSERT(src2 == TMP_REG2); 374 if (flags & ALT_FORM2) { 375 compiler->imm &= 0x1f; 376 FAIL_IF(push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11))); 377 } 378 else { 379 compiler->imm &= 0x3f; 380 FAIL_IF(push_inst(compiler, SRADI | RC(flags) | S(src1) | A(dst) | ((compiler->imm & 0x1f) << 11) | ((compiler->imm & 0x20) >> 4))); 381 } 382 } 383 else 384 FAIL_IF(push_inst(compiler, ((flags & ALT_FORM2) ? SRAW : SRAD) | RC(flags) | S(src1) | A(dst) | B(src2))); 385 return (flags & ALT_FORM3) ? push_inst(compiler, MTXER | S(0)) : SLJIT_SUCCESS; 386 } 387 388 SLJIT_ASSERT_STOP(); 389 return SLJIT_SUCCESS; 390 } 391 392 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw init_value) 393 { 394 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 48))); 395 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value >> 32))); 396 FAIL_IF(PUSH_RLDICR(reg, 31)); 397 FAIL_IF(push_inst(compiler, ORIS | S(reg) | A(reg) | IMM(init_value >> 16))); 398 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value)); 399 } 400 401 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr) 402 { 403 sljit_ins *inst = (sljit_ins*)addr; 404 405 inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 48) & 0xffff); 406 inst[1] = (inst[1] & 0xffff0000) | ((new_addr >> 32) & 0xffff); 407 inst[3] = (inst[3] & 0xffff0000) | ((new_addr >> 16) & 0xffff); 408 inst[4] = (inst[4] & 0xffff0000) | (new_addr & 0xffff); 409 SLJIT_CACHE_FLUSH(inst, inst + 5); 410 } 411 412 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant) 413 { 414 sljit_ins *inst = (sljit_ins*)addr; 415 416 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 48) & 0xffff); 417 inst[1] = (inst[1] & 0xffff0000) | ((new_constant >> 32) & 0xffff); 418 inst[3] = (inst[3] & 0xffff0000) | ((new_constant >> 16) & 0xffff); 419 inst[4] = (inst[4] & 0xffff0000) | (new_constant & 0xffff); 420 SLJIT_CACHE_FLUSH(inst, inst + 5); 421 } 422
