sljitNativePPC_64.c revision 1.4
1/* $NetBSD: sljitNativePPC_64.c,v 1.4 2019/01/20 23:14:16 alnsn Exp $ */ 2 3/* 4 * Stack-less Just-In-Time compiler 5 * 6 * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without modification, are 9 * permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright notice, this list of 12 * conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 15 * of conditions and the following disclaimer in the documentation and/or other materials 16 * provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY 19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 21 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29/* ppc 64-bit arch dependent functions. */ 30 31#if defined(__GNUC__) || (defined(__IBM_GCC_ASM) && __IBM_GCC_ASM) 32#define ASM_SLJIT_CLZ(src, dst) \ 33 __asm__ volatile ( "cntlzd %0, %1" : "=r"(dst) : "r"(src) ) 34#elif defined(__xlc__) 35#error "Please enable GCC syntax for inline assembly statements" 36#else 37#error "Must implement count leading zeroes" 38#endif 39 40#define RLDI(dst, src, sh, mb, type) \ 41 (HI(30) | S(src) | A(dst) | ((type) << 2) | (((sh) & 0x1f) << 11) | (((sh) & 0x20) >> 4) | (((mb) & 0x1f) << 6) | ((mb) & 0x20)) 42 43#define PUSH_RLDICR(reg, shift) \ 44 push_inst(compiler, RLDI(reg, reg, 63 - shift, shift, 1)) 45 46static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm) 47{ 48 sljit_uw tmp; 49 sljit_uw shift; 50 sljit_uw tmp2; 51 sljit_uw shift2; 52 53 if (imm <= SIMM_MAX && imm >= SIMM_MIN) 54 return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm)); 55 56 if (!(imm & ~0xffff)) 57 return push_inst(compiler, ORI | S(TMP_ZERO) | A(reg) | IMM(imm)); 58 59 if (imm <= 0x7fffffffl && imm >= -0x80000000l) { 60 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16))); 61 return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS; 62 } 63 64 /* Count leading zeroes. */ 65 tmp = (imm >= 0) ? imm : ~imm; 66 ASM_SLJIT_CLZ(tmp, shift); 67 SLJIT_ASSERT(shift > 0); 68 shift--; 69 tmp = (imm << shift); 70 71 if ((tmp & ~0xffff000000000000ul) == 0) { 72 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 73 shift += 15; 74 return PUSH_RLDICR(reg, shift); 75 } 76 77 if ((tmp & ~0xffffffff00000000ul) == 0) { 78 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(tmp >> 48))); 79 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | IMM(tmp >> 32))); 80 shift += 31; 81 return PUSH_RLDICR(reg, shift); 82 } 83 84 /* Cut out the 16 bit from immediate. */ 85 shift += 15; 86 tmp2 = imm & ((1ul << (63 - shift)) - 1); 87 88 if (tmp2 <= 0xffff) { 89 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 90 FAIL_IF(PUSH_RLDICR(reg, shift)); 91 return push_inst(compiler, ORI | S(reg) | A(reg) | tmp2); 92 } 93 94 if (tmp2 <= 0xffffffff) { 95 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 96 FAIL_IF(PUSH_RLDICR(reg, shift)); 97 FAIL_IF(push_inst(compiler, ORIS | S(reg) | A(reg) | (tmp2 >> 16))); 98 return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(tmp2)) : SLJIT_SUCCESS; 99 } 100 101 ASM_SLJIT_CLZ(tmp2, shift2); 102 tmp2 <<= shift2; 103 104 if ((tmp2 & ~0xffff000000000000ul) == 0) { 105 FAIL_IF(push_inst(compiler, ADDI | D(reg) | A(0) | IMM(tmp >> 48))); 106 shift2 += 15; 107 shift += (63 - shift2); 108 FAIL_IF(PUSH_RLDICR(reg, shift)); 109 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | (tmp2 >> 48))); 110 return PUSH_RLDICR(reg, shift2); 111 } 112 113 /* The general version. */ 114 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 48))); 115 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm >> 32))); 116 FAIL_IF(PUSH_RLDICR(reg, 31)); 117 FAIL_IF(push_inst(compiler, ORIS | S(reg) | A(reg) | IMM(imm >> 16))); 118 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)); 119} 120 121/* Simplified mnemonics: clrldi. */ 122#define INS_CLEAR_LEFT(dst, src, from) \ 123 (RLDICL | S(src) | A(dst) | ((from) << 6) | (1 << 5)) 124 125/* Sign extension for integer operations. */ 126#define UN_EXTS() \ 127 if ((flags & (ALT_SIGN_EXT | REG2_SOURCE)) == (ALT_SIGN_EXT | REG2_SOURCE)) { \ 128 FAIL_IF(push_inst(compiler, EXTSW | S(src2) | A(TMP_REG2))); \ 129 src2 = TMP_REG2; \ 130 } 131 132#define BIN_EXTS() \ 133 if (flags & ALT_SIGN_EXT) { \ 134 if (flags & REG1_SOURCE) { \ 135 FAIL_IF(push_inst(compiler, EXTSW | S(src1) | A(TMP_REG1))); \ 136 src1 = TMP_REG1; \ 137 } \ 138 if (flags & REG2_SOURCE) { \ 139 FAIL_IF(push_inst(compiler, EXTSW | S(src2) | A(TMP_REG2))); \ 140 src2 = TMP_REG2; \ 141 } \ 142 } 143 144#define BIN_IMM_EXTS() \ 145 if ((flags & (ALT_SIGN_EXT | REG1_SOURCE)) == (ALT_SIGN_EXT | REG1_SOURCE)) { \ 146 FAIL_IF(push_inst(compiler, EXTSW | S(src1) | A(TMP_REG1))); \ 147 src1 = TMP_REG1; \ 148 } 149 150static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags, 151 sljit_s32 dst, sljit_s32 src1, sljit_s32 src2) 152{ 153 switch (op) { 154 case SLJIT_MOV: 155 case SLJIT_MOV_P: 156 SLJIT_ASSERT(src1 == TMP_REG1); 157 if (dst != src2) 158 return push_inst(compiler, OR | S(src2) | A(dst) | B(src2)); 159 return SLJIT_SUCCESS; 160 161 case SLJIT_MOV_U32: 162 case SLJIT_MOV_S32: 163 SLJIT_ASSERT(src1 == TMP_REG1); 164 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { 165 if (op == SLJIT_MOV_S32) 166 return push_inst(compiler, EXTSW | S(src2) | A(dst)); 167 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 0)); 168 } 169 else { 170 SLJIT_ASSERT(dst == src2); 171 } 172 return SLJIT_SUCCESS; 173 174 case SLJIT_MOV_U8: 175 case SLJIT_MOV_S8: 176 SLJIT_ASSERT(src1 == TMP_REG1); 177 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { 178 if (op == SLJIT_MOV_S8) 179 return push_inst(compiler, EXTSB | S(src2) | A(dst)); 180 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24)); 181 } 182 else if ((flags & REG_DEST) && op == SLJIT_MOV_S8) 183 return push_inst(compiler, EXTSB | S(src2) | A(dst)); 184 else { 185 SLJIT_ASSERT(dst == src2); 186 } 187 return SLJIT_SUCCESS; 188 189 case SLJIT_MOV_U16: 190 case SLJIT_MOV_S16: 191 SLJIT_ASSERT(src1 == TMP_REG1); 192 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { 193 if (op == SLJIT_MOV_S16) 194 return push_inst(compiler, EXTSH | S(src2) | A(dst)); 195 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16)); 196 } 197 else { 198 SLJIT_ASSERT(dst == src2); 199 } 200 return SLJIT_SUCCESS; 201 202 case SLJIT_NOT: 203 SLJIT_ASSERT(src1 == TMP_REG1); 204 UN_EXTS(); 205 return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2)); 206 207 case SLJIT_NEG: 208 SLJIT_ASSERT(src1 == TMP_REG1); 209 UN_EXTS(); 210 return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2)); 211 212 case SLJIT_CLZ: 213 SLJIT_ASSERT(src1 == TMP_REG1); 214 if (flags & ALT_FORM1) 215 return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst)); 216 return push_inst(compiler, CNTLZD | RC(flags) | S(src2) | A(dst)); 217 218 case SLJIT_ADD: 219 if (flags & ALT_FORM1) { 220 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 221 SLJIT_ASSERT(src2 == TMP_REG2); 222 return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm); 223 } 224 if (flags & ALT_FORM2) { 225 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 226 SLJIT_ASSERT(src2 == TMP_REG2); 227 return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm); 228 } 229 if (flags & ALT_FORM3) { 230 SLJIT_ASSERT(src2 == TMP_REG2); 231 BIN_IMM_EXTS(); 232 return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm); 233 } 234 if (flags & ALT_FORM4) { 235 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 236 FAIL_IF(push_inst(compiler, ADDI | D(dst) | A(src1) | (compiler->imm & 0xffff))); 237 return push_inst(compiler, ADDIS | D(dst) | A(dst) | (((compiler->imm >> 16) & 0xffff) + ((compiler->imm >> 15) & 0x1))); 238 } 239 if (!(flags & ALT_SET_FLAGS)) 240 return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2)); 241 BIN_EXTS(); 242 return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2)); 243 244 case SLJIT_ADDC: 245 BIN_EXTS(); 246 return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)); 247 248 case SLJIT_SUB: 249 if (flags & ALT_FORM1) { 250 /* Flags does not set: BIN_IMM_EXTS unnecessary. */ 251 SLJIT_ASSERT(src2 == TMP_REG2); 252 return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm); 253 } 254 if (flags & (ALT_FORM2 | ALT_FORM3)) { 255 SLJIT_ASSERT(src2 == TMP_REG2); 256 return push_inst(compiler, ((flags & ALT_FORM2) ? CMPI : CMPLI) | CRD(0 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | compiler->imm); 257 } 258 if (flags & (ALT_FORM4 | ALT_FORM5)) { 259 return push_inst(compiler, ((flags & ALT_FORM4) ? CMP : CMPL) | CRD(0 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | B(src2)); 260 } 261 if (flags & ALT_FORM6) { 262 SLJIT_ASSERT(src2 == TMP_REG2); 263 FAIL_IF(push_inst(compiler, CMPLI | CRD(0 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | compiler->imm)); 264 return push_inst(compiler, ADDI | D(dst) | A(src1) | (-compiler->imm & 0xffff)); 265 } 266 if (flags & ALT_FORM7) { 267 FAIL_IF(push_inst(compiler, CMPL | CRD(0 | ((flags & ALT_SIGN_EXT) ? 0 : 1)) | A(src1) | B(src2))); 268 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); 269 } 270 if (!(flags & ALT_SET_FLAGS)) 271 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); 272 BIN_EXTS(); 273 return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1)); 274 275 case SLJIT_SUBC: 276 BIN_EXTS(); 277 return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)); 278 279 case SLJIT_MUL: 280 if (flags & ALT_FORM1) { 281 SLJIT_ASSERT(src2 == TMP_REG2); 282 return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm); 283 } 284 BIN_EXTS(); 285 if (flags & ALT_FORM2) 286 return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1)); 287 return push_inst(compiler, MULLD | OERC(flags) | D(dst) | A(src2) | B(src1)); 288 289 case SLJIT_AND: 290 if (flags & ALT_FORM1) { 291 SLJIT_ASSERT(src2 == TMP_REG2); 292 return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm); 293 } 294 if (flags & ALT_FORM2) { 295 SLJIT_ASSERT(src2 == TMP_REG2); 296 return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm); 297 } 298 return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2)); 299 300 case SLJIT_OR: 301 if (flags & ALT_FORM1) { 302 SLJIT_ASSERT(src2 == TMP_REG2); 303 return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm); 304 } 305 if (flags & ALT_FORM2) { 306 SLJIT_ASSERT(src2 == TMP_REG2); 307 return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm); 308 } 309 if (flags & ALT_FORM3) { 310 SLJIT_ASSERT(src2 == TMP_REG2); 311 FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm))); 312 return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); 313 } 314 return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2)); 315 316 case SLJIT_XOR: 317 if (flags & ALT_FORM1) { 318 SLJIT_ASSERT(src2 == TMP_REG2); 319 return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm); 320 } 321 if (flags & ALT_FORM2) { 322 SLJIT_ASSERT(src2 == TMP_REG2); 323 return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm); 324 } 325 if (flags & ALT_FORM3) { 326 SLJIT_ASSERT(src2 == TMP_REG2); 327 FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm))); 328 return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); 329 } 330 return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2)); 331 332 case SLJIT_SHL: 333 if (flags & ALT_FORM1) { 334 SLJIT_ASSERT(src2 == TMP_REG2); 335 if (flags & ALT_FORM2) { 336 compiler->imm &= 0x1f; 337 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1)); 338 } 339 compiler->imm &= 0x3f; 340 return push_inst(compiler, RLDI(dst, src1, compiler->imm, 63 - compiler->imm, 1) | RC(flags)); 341 } 342 return push_inst(compiler, ((flags & ALT_FORM2) ? SLW : SLD) | RC(flags) | S(src1) | A(dst) | B(src2)); 343 344 case SLJIT_LSHR: 345 if (flags & ALT_FORM1) { 346 SLJIT_ASSERT(src2 == TMP_REG2); 347 if (flags & ALT_FORM2) { 348 compiler->imm &= 0x1f; 349 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1)); 350 } 351 compiler->imm &= 0x3f; 352 return push_inst(compiler, RLDI(dst, src1, 64 - compiler->imm, compiler->imm, 0) | RC(flags)); 353 } 354 return push_inst(compiler, ((flags & ALT_FORM2) ? SRW : SRD) | RC(flags) | S(src1) | A(dst) | B(src2)); 355 356 case SLJIT_ASHR: 357 if (flags & ALT_FORM1) { 358 SLJIT_ASSERT(src2 == TMP_REG2); 359 if (flags & ALT_FORM2) { 360 compiler->imm &= 0x1f; 361 return push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11)); 362 } 363 compiler->imm &= 0x3f; 364 return push_inst(compiler, SRADI | RC(flags) | S(src1) | A(dst) | ((compiler->imm & 0x1f) << 11) | ((compiler->imm & 0x20) >> 4)); 365 } 366 return push_inst(compiler, ((flags & ALT_FORM2) ? SRAW : SRAD) | RC(flags) | S(src1) | A(dst) | B(src2)); 367 } 368 369 SLJIT_UNREACHABLE(); 370 return SLJIT_SUCCESS; 371} 372 373static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw init_value) 374{ 375 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 48))); 376 FAIL_IF(push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value >> 32))); 377 FAIL_IF(PUSH_RLDICR(reg, 31)); 378 FAIL_IF(push_inst(compiler, ORIS | S(reg) | A(reg) | IMM(init_value >> 16))); 379 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value)); 380} 381 382SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset) 383{ 384 sljit_ins *inst = (sljit_ins*)addr; 385 386 inst[0] = (inst[0] & 0xffff0000) | ((new_target >> 48) & 0xffff); 387 inst[1] = (inst[1] & 0xffff0000) | ((new_target >> 32) & 0xffff); 388 inst[3] = (inst[3] & 0xffff0000) | ((new_target >> 16) & 0xffff); 389 inst[4] = (inst[4] & 0xffff0000) | (new_target & 0xffff); 390 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset); 391 SLJIT_CACHE_FLUSH(inst, inst + 5); 392} 393 394SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset) 395{ 396 sljit_ins *inst = (sljit_ins*)addr; 397 398 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 48) & 0xffff); 399 inst[1] = (inst[1] & 0xffff0000) | ((new_constant >> 32) & 0xffff); 400 inst[3] = (inst[3] & 0xffff0000) | ((new_constant >> 16) & 0xffff); 401 inst[4] = (inst[4] & 0xffff0000) | (new_constant & 0xffff); 402 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset); 403 SLJIT_CACHE_FLUSH(inst, inst + 5); 404} 405