github.com/kdevb0x/go@v0.0.0-20180115030120-39687051e9e7/src/math/pow_s390x.s (about) 1 // Copyright 2017 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 #include "textflag.h" 6 7 #define PosInf 0x7FF0000000000000 8 #define NaN 0x7FF8000000000001 9 #define NegInf 0xFFF0000000000000 10 #define PosOne 0x3FF0000000000000 11 #define NegOne 0xBFF0000000000000 12 #define NegZero 0x8000000000000000 13 14 // Minimax polynomial approximation 15 DATA ·powrodataL51<> + 0(SB)/8, $-1.0 16 DATA ·powrodataL51<> + 8(SB)/8, $1.0 17 DATA ·powrodataL51<> + 16(SB)/8, $0.24022650695910110361E+00 18 DATA ·powrodataL51<> + 24(SB)/8, $0.69314718055994686185E+00 19 DATA ·powrodataL51<> + 32(SB)/8, $0.96181291057109484809E-02 20 DATA ·powrodataL51<> + 40(SB)/8, $0.15403814778342868389E-03 21 DATA ·powrodataL51<> + 48(SB)/8, $0.55504108652095235601E-01 22 DATA ·powrodataL51<> + 56(SB)/8, $0.13333818813168698658E-02 23 DATA ·powrodataL51<> + 64(SB)/8, $0.68205322933914439200E-12 24 DATA ·powrodataL51<> + 72(SB)/8, $-.18466496523378731640E-01 25 DATA ·powrodataL51<> + 80(SB)/8, $0.19697596291603973706E-02 26 DATA ·powrodataL51<> + 88(SB)/8, $0.23083120654155209200E+00 27 DATA ·powrodataL51<> + 96(SB)/8, $0.55324356012093416771E-06 28 DATA ·powrodataL51<> + 104(SB)/8, $-.40340677224649339048E-05 29 DATA ·powrodataL51<> + 112(SB)/8, $0.30255507904062541562E-04 30 DATA ·powrodataL51<> + 120(SB)/8, $-.77453979912413008787E-07 31 DATA ·powrodataL51<> + 128(SB)/8, $-.23637115549923464737E-03 32 DATA ·powrodataL51<> + 136(SB)/8, $0.11016119077267717198E-07 33 DATA ·powrodataL51<> + 144(SB)/8, $0.22608272174486123035E-09 34 DATA ·powrodataL51<> + 152(SB)/8, $-.15895808101370190382E-08 35 DATA ·powrodataL51<> + 160(SB)/8, $0x4540190000000000 36 GLOBL ·powrodataL51<> + 0(SB), RODATA, $168 37 38 // Constants 39 DATA ·pow_x001a<> + 0(SB)/8, $0x1a000000000000 40 GLOBL ·pow_x001a<> + 0(SB), RODATA, $8 41 DATA ·pow_xinf<> + 0(SB)/8, $0x7ff0000000000000 //+Inf 42 GLOBL ·pow_xinf<> + 0(SB), RODATA, $8 43 DATA ·pow_xnan<> + 0(SB)/8, $0x7ff8000000000000 //NaN 44 GLOBL ·pow_xnan<> + 0(SB), RODATA, $8 45 DATA ·pow_x434<> + 0(SB)/8, $0x4340000000000000 46 GLOBL ·pow_x434<> + 0(SB), RODATA, $8 47 DATA ·pow_x433<> + 0(SB)/8, $0x4330000000000000 48 GLOBL ·pow_x433<> + 0(SB), RODATA, $8 49 DATA ·pow_x43f<> + 0(SB)/8, $0x43f0000000000000 50 GLOBL ·pow_x43f<> + 0(SB), RODATA, $8 51 DATA ·pow_xadd<> + 0(SB)/8, $0xc2f0000100003fef 52 GLOBL ·pow_xadd<> + 0(SB), RODATA, $8 53 DATA ·pow_xa<> + 0(SB)/8, $0x4019000000000000 54 GLOBL ·pow_xa<> + 0(SB), RODATA, $8 55 56 // Scale correction tables 57 DATA powiadd<> + 0(SB)/8, $0xf000000000000000 58 DATA powiadd<> + 8(SB)/8, $0x1000000000000000 59 GLOBL powiadd<> + 0(SB), RODATA, $16 60 DATA powxscale<> + 0(SB)/8, $0x4ff0000000000000 61 DATA powxscale<> + 8(SB)/8, $0x2ff0000000000000 62 GLOBL powxscale<> + 0(SB), RODATA, $16 63 64 // Fractional powers of 2 table 65 DATA ·powtexp<> + 0(SB)/8, $0.442737824274138381E-01 66 DATA ·powtexp<> + 8(SB)/8, $0.263602189790660309E-01 67 DATA ·powtexp<> + 16(SB)/8, $0.122565642281703586E-01 68 DATA ·powtexp<> + 24(SB)/8, $0.143757052860721398E-02 69 DATA ·powtexp<> + 32(SB)/8, $-.651375034121276075E-02 70 DATA ·powtexp<> + 40(SB)/8, $-.119317678849450159E-01 71 DATA ·powtexp<> + 48(SB)/8, $-.150868749549871069E-01 72 DATA ·powtexp<> + 56(SB)/8, $-.161992609578469234E-01 73 DATA ·powtexp<> + 64(SB)/8, $-.154492360403337917E-01 74 DATA ·powtexp<> + 72(SB)/8, $-.129850717389178721E-01 75 DATA ·powtexp<> + 80(SB)/8, $-.892902649276657891E-02 76 DATA ·powtexp<> + 88(SB)/8, $-.338202636596794887E-02 77 DATA ·powtexp<> + 96(SB)/8, $0.357266307045684762E-02 78 DATA ·powtexp<> + 104(SB)/8, $0.118665304327406698E-01 79 DATA ·powtexp<> + 112(SB)/8, $0.214434994118118914E-01 80 DATA ·powtexp<> + 120(SB)/8, $0.322580645161290314E-01 81 GLOBL ·powtexp<> + 0(SB), RODATA, $128 82 83 // Log multiplier tables 84 DATA ·powtl<> + 0(SB)/8, $0xbdf9723a80db6a05 85 DATA ·powtl<> + 8(SB)/8, $0x3e0cfe4a0babe862 86 DATA ·powtl<> + 16(SB)/8, $0xbe163b42dd33dada 87 DATA ·powtl<> + 24(SB)/8, $0xbe0cdf9de2a8429c 88 DATA ·powtl<> + 32(SB)/8, $0xbde9723a80db6a05 89 DATA ·powtl<> + 40(SB)/8, $0xbdb37fcae081745e 90 DATA ·powtl<> + 48(SB)/8, $0xbdd8b2f901ac662c 91 DATA ·powtl<> + 56(SB)/8, $0xbde867dc68c36cc9 92 DATA ·powtl<> + 64(SB)/8, $0xbdd23e36b47256b7 93 DATA ·powtl<> + 72(SB)/8, $0xbde4c9b89fcc7933 94 DATA ·powtl<> + 80(SB)/8, $0xbdd16905cad7cf66 95 DATA ·powtl<> + 88(SB)/8, $0x3ddb417414aa5529 96 DATA ·powtl<> + 96(SB)/8, $0xbdce046f2889983c 97 DATA ·powtl<> + 104(SB)/8, $0x3dc2c3865d072897 98 DATA ·powtl<> + 112(SB)/8, $0x8000000000000000 99 DATA ·powtl<> + 120(SB)/8, $0x3dc1ca48817f8afe 100 DATA ·powtl<> + 128(SB)/8, $0xbdd703518a88bfb7 101 DATA ·powtl<> + 136(SB)/8, $0x3dc64afcc46942ce 102 DATA ·powtl<> + 144(SB)/8, $0xbd9d79191389891a 103 DATA ·powtl<> + 152(SB)/8, $0x3ddd563044da4fa0 104 DATA ·powtl<> + 160(SB)/8, $0x3e0f42b5e5f8f4b6 105 DATA ·powtl<> + 168(SB)/8, $0x3e0dfa2c2cbf6ead 106 DATA ·powtl<> + 176(SB)/8, $0x3e14e25e91661293 107 DATA ·powtl<> + 184(SB)/8, $0x3e0aac461509e20c 108 GLOBL ·powtl<> + 0(SB), RODATA, $192 109 110 DATA ·powtm<> + 0(SB)/8, $0x3da69e13 111 DATA ·powtm<> + 8(SB)/8, $0x100003d66fcb6 112 DATA ·powtm<> + 16(SB)/8, $0x200003d1538df 113 DATA ·powtm<> + 24(SB)/8, $0x300003cab729e 114 DATA ·powtm<> + 32(SB)/8, $0x400003c1a784c 115 DATA ·powtm<> + 40(SB)/8, $0x500003ac9b074 116 DATA ·powtm<> + 48(SB)/8, $0x60000bb498d22 117 DATA ·powtm<> + 56(SB)/8, $0x68000bb8b29a2 118 DATA ·powtm<> + 64(SB)/8, $0x70000bb9a32d4 119 DATA ·powtm<> + 72(SB)/8, $0x74000bb9946bb 120 DATA ·powtm<> + 80(SB)/8, $0x78000bb92e34b 121 DATA ·powtm<> + 88(SB)/8, $0x80000bb6c57dc 122 DATA ·powtm<> + 96(SB)/8, $0x84000bb4020f7 123 DATA ·powtm<> + 104(SB)/8, $0x8c000ba93832d 124 DATA ·powtm<> + 112(SB)/8, $0x9000080000000 125 DATA ·powtm<> + 120(SB)/8, $0x940003aa66c4c 126 DATA ·powtm<> + 128(SB)/8, $0x980003b2fb12a 127 DATA ·powtm<> + 136(SB)/8, $0xa00003bc1def6 128 DATA ·powtm<> + 144(SB)/8, $0xa80003c1eb0eb 129 DATA ·powtm<> + 152(SB)/8, $0xb00003c64dcec 130 DATA ·powtm<> + 160(SB)/8, $0xc00003cc49e4e 131 DATA ·powtm<> + 168(SB)/8, $0xd00003d12f1de 132 DATA ·powtm<> + 176(SB)/8, $0xe00003d4a9c6f 133 DATA ·powtm<> + 184(SB)/8, $0xf00003d846c66 134 GLOBL ·powtm<> + 0(SB), RODATA, $192 135 136 // Table of indeces into multiplier tables 137 // Adjusted from asm to remove offset and convert 138 DATA ·powtabi<> + 0(SB)/8, $0x1010101 139 DATA ·powtabi<> + 8(SB)/8, $0x101020202020203 140 DATA ·powtabi<> + 16(SB)/8, $0x303030404040405 141 DATA ·powtabi<> + 24(SB)/8, $0x505050606060708 142 DATA ·powtabi<> + 32(SB)/8, $0x90a0b0c0d0e0f10 143 DATA ·powtabi<> + 40(SB)/8, $0x1011111212121313 144 DATA ·powtabi<> + 48(SB)/8, $0x1314141414151515 145 DATA ·powtabi<> + 56(SB)/8, $0x1516161617171717 146 GLOBL ·powtabi<> + 0(SB), RODATA, $64 147 148 // Pow returns x**y, the base-x exponential of y. 149 // 150 // Special cases are (in order): 151 // Pow(x, ±0) = 1 for any x 152 // Pow(1, y) = 1 for any y 153 // Pow(x, 1) = x for any x 154 // Pow(NaN, y) = NaN 155 // Pow(x, NaN) = NaN 156 // Pow(±0, y) = ±Inf for y an odd integer < 0 157 // Pow(±0, -Inf) = +Inf 158 // Pow(±0, +Inf) = +0 159 // Pow(±0, y) = +Inf for finite y < 0 and not an odd integer 160 // Pow(±0, y) = ±0 for y an odd integer > 0 161 // Pow(±0, y) = +0 for finite y > 0 and not an odd integer 162 // Pow(-1, ±Inf) = 1 163 // Pow(x, +Inf) = +Inf for |x| > 1 164 // Pow(x, -Inf) = +0 for |x| > 1 165 // Pow(x, +Inf) = +0 for |x| < 1 166 // Pow(x, -Inf) = +Inf for |x| < 1 167 // Pow(+Inf, y) = +Inf for y > 0 168 // Pow(+Inf, y) = +0 for y < 0 169 // Pow(-Inf, y) = Pow(-0, -y) 170 // Pow(x, y) = NaN for finite x < 0 and finite non-integer y 171 172 TEXT ·powAsm(SB), NOSPLIT, $0-24 173 // special case 174 MOVD x+0(FP), R1 175 MOVD y+8(FP), R2 176 177 // special case Pow(1, y) = 1 for any y 178 MOVD $PosOne, R3 179 CMPUBEQ R1, R3, xIsOne 180 181 // special case Pow(x, 1) = x for any x 182 MOVD $PosOne, R4 183 CMPUBEQ R2, R4, yIsOne 184 185 // special case Pow(x, NaN) = NaN for any x 186 MOVD $~(1<<63), R5 187 AND R2, R5 // y = |y| 188 MOVD $PosInf, R4 189 CMPUBLT R4, R5, yIsNan 190 191 MOVD $NegInf, R3 192 CMPUBEQ R1, R3, xIsNegInf 193 194 MOVD $NegOne, R3 195 CMPUBEQ R1, R3, xIsNegOne 196 197 MOVD $PosInf, R3 198 CMPUBEQ R1, R3, xIsPosInf 199 200 MOVD $NegZero, R3 201 CMPUBEQ R1, R3, xIsNegZero 202 203 MOVD $PosInf, R4 204 CMPUBEQ R2, R4, yIsPosInf 205 206 MOVD $0x0, R3 207 CMPUBEQ R1, R3, xIsPosZero 208 CMPBLT R1, R3, xLtZero 209 BR Normal 210 xIsPosInf: 211 // special case Pow(+Inf, y) = +Inf for y > 0 212 MOVD $0x0, R4 213 CMPBGT R2, R4, posInfGeZero 214 BR Normal 215 xIsNegInf: 216 //Pow(-Inf, y) = Pow(-0, -y) 217 FMOVD y+8(FP), F2 218 FNEG F2, F2 // y = -y 219 BR negZeroNegY // call Pow(-0, -y) 220 xIsNegOne: 221 // special case Pow(-1, ±Inf) = 1 222 MOVD $PosInf, R4 223 CMPUBEQ R2, R4, negOnePosInf 224 MOVD $NegInf, R4 225 CMPUBEQ R2, R4, negOneNegInf 226 BR Normal 227 xIsPosZero: 228 // special case Pow(+0, -Inf) = +Inf 229 MOVD $NegInf, R4 230 CMPUBEQ R2, R4, zeroNegInf 231 232 // special case Pow(+0, y < 0) = +Inf 233 FMOVD y+8(FP), F2 234 FMOVD $(0.0), F4 235 FCMPU F2, F4 236 BLT posZeroLtZero //y < 0.0 237 BR Normal 238 xIsNegZero: 239 // special case Pow(-0, -Inf) = +Inf 240 MOVD $NegInf, R4 241 CMPUBEQ R2, R4, zeroNegInf 242 FMOVD y+8(FP), F2 243 negZeroNegY: 244 // special case Pow(x, ±0) = 1 for any x 245 FMOVD $(0.0), F4 246 FCMPU F4, F2 247 BLT negZeroGtZero // y > 0.0 248 BEQ yIsZero // y = 0.0 249 250 FMOVD $(-0.0), F4 251 FCMPU F4, F2 252 BLT negZeroGtZero // y > -0.0 253 BEQ yIsZero // y = -0.0 254 255 // special case Pow(-0, y) = -Inf for y an odd integer < 0 256 // special case Pow(-0, y) = +Inf for finite y < 0 and not an odd integer 257 FIDBR $5, F2, F4 //F2 translate to integer F4 258 FCMPU F2, F4 259 BNE zeroNotOdd // y is not an (odd) integer and y < 0 260 FMOVD $(2.0), F4 261 FDIV F4, F2 // F2 = F2 / 2.0 262 FIDBR $5, F2, F4 //F2 translate to integer F4 263 FCMPU F2, F4 264 BNE negZeroOddInt // y is an odd integer and y < 0 265 BR zeroNotOdd // y is not an (odd) integer and y < 0 266 267 negZeroGtZero: 268 // special case Pow(-0, y) = -0 for y an odd integer > 0 269 // special case Pow(±0, y) = +0 for finite y > 0 and not an odd integer 270 FIDBR $5, F2, F4 //F2 translate to integer F4 271 FCMPU F2, F4 272 BNE zeroNotOddGtZero // y is not an (odd) integer and y > 0 273 FMOVD $(2.0), F4 274 FDIV F4, F2 // F2 = F2 / 2.0 275 FIDBR $5, F2, F4 //F2 translate to integer F4 276 FCMPU F2, F4 277 BNE negZeroOddIntGtZero // y is an odd integer and y > 0 278 BR zeroNotOddGtZero // y is not an (odd) integer 279 280 xLtZero: 281 // special case Pow(x, y) = NaN for finite x < 0 and finite non-integer y 282 FMOVD y+8(FP), F2 283 FIDBR $5, F2, F4 284 FCMPU F2, F4 285 BNE ltZeroInt 286 BR Normal 287 yIsPosInf: 288 // special case Pow(x, +Inf) = +Inf for |x| > 1 289 FMOVD x+0(FP), F1 290 FMOVD $(1.0), F3 291 FCMPU F1, F3 292 BGT gtOnePosInf 293 FMOVD $(-1.0), F3 294 FCMPU F1, F3 295 BLT ltNegOnePosInf 296 Normal: 297 FMOVD x+0(FP), F0 298 FMOVD y+8(FP), F2 299 MOVD $·powrodataL51<>+0(SB), R9 300 WORD $0xB3CD0030 //lgdr %r3,%f0 301 WORD $0xC0298009 //iilf %r2,2148095317 302 BYTE $0x55 303 BYTE $0x55 304 WORD $0xEC1320BF //risbgn %r1,%r3,64-32,128+63,64+0+32 305 BYTE $0x60 306 BYTE $0x59 307 SUBW R1, R2 308 WORD $0xEC323ABF //risbgn %r3,%r2,64-6,128+63,64+44+6 309 BYTE $0x72 310 BYTE $0x59 311 BYTE $0x18 //lr %r5,%r1 312 BYTE $0x51 313 MOVD $·powtabi<>+0(SB), R12 314 WORD $0xE303C000 //llgc %r0,0(%r3,%r12) 315 BYTE $0x00 316 BYTE $0x90 317 SUBW $0x1A0000, R5 318 SLD $3, R0, R3 319 MOVD $·powtm<>+0(SB), R4 320 MOVH $0x0, R8 321 ANDW $0x7FF00000, R2 322 ORW R5, R1 323 WORD $0x5A234000 //a %r2,0(%r3,%r4) 324 MOVD $0x3FF0000000000000, R5 325 WORD $0xEC3228BF //risbg %r3,%r2,64-24,128+63,64+32+24 326 BYTE $0x78 327 BYTE $0x55 328 WORD $0xEC82001F //risbgn %r8,%r2,64-64+0,64-64+0+32-1,64-0-32 329 BYTE $0x20 330 BYTE $0x59 331 ORW $0x45000000, R3 332 MOVW R1, R6 333 CMPBLT R6, $0, L42 334 FMOVD F0, F4 335 L2: 336 VLVGF $0, R3, V1 337 MOVD $·pow_xa<>+0(SB), R2 338 WORD $0xED3090A0 //lde %f3,.L52-.L51(%r9) 339 BYTE $0x00 340 BYTE $0x24 341 FMOVD 0(R2), F6 342 FSUBS F1, F3 343 WORD $0xB3C10018 //ldgr %f1,%r8 344 WFMSDB V4, V1, V6, V4 345 FMOVD 152(R9), F6 346 WFMDB V4, V4, V7 347 FMOVD 144(R9), F1 348 FMOVD 136(R9), F5 349 WFMADB V4, V1, V6, V1 350 VLEG $0, 128(R9), V16 351 FMOVD 120(R9), F6 352 WFMADB V4, V5, V6, V5 353 FMOVD 112(R9), F6 354 WFMADB V1, V7, V5, V1 355 WFMADB V4, V6, V16, V16 356 SLD $3, R0, R2 357 FMOVD 104(R9), F5 358 WORD $0xED824004 //ldeb %f8,4(%r2,%r4) 359 BYTE $0x00 360 BYTE $0x04 361 LDEBR F3, F3 362 FMOVD 96(R9), F6 363 WFMADB V4, V6, V5, V6 364 FADD F8, F3 365 WFMADB V7, V6, V16, V6 366 FMUL F7, F7 367 FMOVD 88(R9), F5 368 FMADD F7, F1, F6 369 WFMADB V4, V5, V3, V16 370 FMOVD 80(R9), F1 371 WFSDB V16, V3, V3 372 MOVD $·powtl<>+0(SB), R3 373 WFMADB V4, V6, V1, V6 374 FMADD F5, F4, F3 375 FMOVD 72(R9), F1 376 WFMADB V4, V6, V1, V6 377 WORD $0xED323000 //adb %f3,0(%r2,%r3) 378 BYTE $0x00 379 BYTE $0x1A 380 FMOVD 64(R9), F1 381 WFMADB V4, V6, V1, V6 382 MOVD $·pow_xadd<>+0(SB), R2 383 WFMADB V4, V6, V3, V4 384 FMOVD 0(R2), F5 385 WFADB V4, V16, V3 386 VLEG $0, 56(R9), V20 387 WFMSDB V2, V3, V5, V3 388 VLEG $0, 48(R9), V18 389 WFADB V3, V5, V6 390 WORD $0xB3CD0023 //lgdr %r2,%f3 391 WFMSDB V2, V16, V6, V16 392 FMOVD 40(R9), F1 393 WFMADB V2, V4, V16, V4 394 FMOVD 32(R9), F7 395 WFMDB V4, V4, V3 396 WFMADB V4, V1, V20, V1 397 WFMADB V4, V7, V18, V7 398 VLEG $0, 24(R9), V16 399 WFMADB V1, V3, V7, V1 400 FMOVD 16(R9), F5 401 WFMADB V4, V5, V16, V5 402 WORD $0xEC4239BC //risbg %r4,%r2,57,128+60,3 403 BYTE $0x03 404 BYTE $0x55 405 WFMADB V3, V1, V5, V1 406 MOVD $·powtexp<>+0(SB), R3 407 WORD $0x68343000 //ld %f3,0(%r4,%r3) 408 FMADD F3, F4, F4 409 WORD $0xEC52000F //risbgn %r5,%r2,64-64+0,64-64+0+16-1,64-0-16 410 BYTE $0x30 411 BYTE $0x59 412 WFMADB V4, V1, V3, V4 413 WORD $0xB3CD0026 //lgdr %r2,%f6 414 WORD $0xB3C10015 //ldgr %f1,%r5 415 SRAD $48, R2, R2 416 FMADD F1, F4, F1 417 RLL $16, R2, R2 418 ANDW $0x7FFF0000, R2 419 WORD $0xC22B3F71 //alfi %r2,1064370176 420 BYTE $0x00 421 BYTE $0x00 422 ORW R2, R1, R3 423 MOVW R3, R6 424 CMPBLT R6, $0, L43 425 L1: 426 FMOVD F1, ret+16(FP) 427 RET 428 L43: 429 WORD $0xB3120000 //ltdbr %f0,%f0 430 BLTU L44 431 FMOVD F0, F3 432 L7: 433 MOVD $·pow_xinf<>+0(SB), R3 434 FMOVD 0(R3), F5 435 WFCEDBS V3, V5, V7 436 BVS L8 437 WFMDB V3, V2, V6 438 L8: 439 WFCEDBS V2, V2, V3 440 BVS L9 441 WORD $0xB3120022 //ltdbr %f2,%f2 442 BEQ L26 443 MOVW R1, R6 444 CMPBLT R6, $0, L45 445 L11: 446 WORD $0xC0190003 //iilf %r1,262143 447 BYTE $0xFF 448 BYTE $0xFF 449 MOVW R2, R7 450 MOVW R1, R6 451 CMPBLE R7, R6, L34 452 WORD $0xEC1520BF //risbgn %r1,%r5,64-32,128+63,64+0+32 453 BYTE $0x60 454 BYTE $0x59 455 WORD $0xB3CD0026 //lgdr %r2,%f6 456 MOVD $powiadd<>+0(SB), R3 457 WORD $0xEC223CBC //risbg %r2,%r2,60,128+60,64-60 458 BYTE $0x04 459 BYTE $0x55 460 WORD $0x5A123000 //a %r1,0(%r2,%r3) 461 WORD $0xEC51001F //risbgn %r5,%r1,64-64+0,64-64+0+32-1,64-0-32 462 BYTE $0x20 463 BYTE $0x59 464 WORD $0xB3C10015 //ldgr %f1,%r5 465 FMADD F1, F4, F1 466 MOVD $powxscale<>+0(SB), R1 467 WORD $0xED121000 //mdb %f1,0(%r2,%r1) 468 BYTE $0x00 469 BYTE $0x1C 470 BR L1 471 L42: 472 WORD $0xB3120000 //ltdbr %f0,%f0 473 BLTU L46 474 FMOVD F0, F4 475 L3: 476 MOVD $·pow_x001a<>+0(SB), R2 477 WORD $0xED402000 //cdb %f4,0(%r2) 478 BYTE $0x00 479 BYTE $0x19 480 BGE L2 481 BVS L2 482 MOVD $·pow_x43f<>+0(SB), R2 483 WORD $0xED402000 //mdb %f4,0(%r2) 484 BYTE $0x00 485 BYTE $0x1C 486 WORD $0xC0298009 //iilf %r2,2148095317 487 BYTE $0x55 488 BYTE $0x55 489 WORD $0xB3CD0034 //lgdr %r3,%f4 490 WORD $0xEC3320BF //risbgn %r3,%r3,64-32,128+63,64+0+32 491 BYTE $0x60 492 BYTE $0x59 493 SUBW R3, R2, R3 494 WORD $0xEC2321AB //risbg %r2,%r3,33,128+43,0 495 BYTE $0x00 496 BYTE $0x55 497 WORD $0xEC333ABF //risbgn %r3,%r3,64-6,128+63,64+44+6 498 BYTE $0x72 499 BYTE $0x59 500 WORD $0xE303C000 //llgc %r0,0(%r3,%r12) 501 BYTE $0x00 502 BYTE $0x90 503 SLD $3, R0, R3 504 WORD $0x5A234000 //a %r2,0(%r3,%r4) 505 BYTE $0x18 //lr %r3,%r2 506 BYTE $0x32 507 WORD $0xEC83001F //risbgn %r8,%r3,64-64+0,64-64+0+32-1,64-0-32 508 BYTE $0x20 509 BYTE $0x59 510 ADDW $0x4000000, R3 511 BLEU L5 512 WORD $0xEC3328BF //risbg %r3,%r3,64-24,128+63,64+32+24 513 BYTE $0x78 514 BYTE $0x55 515 ORW $0x45000000, R3 516 BR L2 517 L9: 518 WFCEDBS V0, V0, V4 519 BVS L35 520 FMOVD F2, F1 521 BR L1 522 L46: 523 WORD $0xB3130040 //lcdbr %f4,%f0 524 BR L3 525 L44: 526 WORD $0xB3130030 //lcdbr %f3,%f0 527 BR L7 528 L35: 529 FMOVD F0, F1 530 BR L1 531 L26: 532 FMOVD 8(R9), F1 533 BR L1 534 L34: 535 FMOVD 8(R9), F4 536 L19: 537 WORD $0xB3120066 //ltdbr %f6,%f6 538 BLEU L47 539 L18: 540 WFMDB V4, V5, V1 541 BR L1 542 L5: 543 WORD $0xEC3321B2 //risbg %r3,%r3,33,128+50,64-1 544 BYTE $0x3F 545 BYTE $0x55 546 WORD $0xC23B4000 //alfi %r3,1073741824 547 BYTE $0x00 548 BYTE $0x00 549 RLL $24, R3, R3 550 ORW $0x45000000, R3 551 BR L2 552 L45: 553 WFCEDBS V0, V0, V4 554 BVS L35 555 WORD $0xB3120000 //ltdbr %f0,%f0 556 BLEU L48 557 FMOVD 8(R9), F4 558 L12: 559 MOVW R2, R6 560 CMPBLT R6, $0, L19 561 FMUL F4, F1 562 BR L1 563 L47: 564 BLT L40 565 WFCEDBS V0, V0, V2 566 BVS L49 567 L16: 568 MOVD ·pow_xnan<>+0(SB), R1 569 WORD $0xB3C10001 //ldgr %f0,%r1 570 WFMDB V4, V0, V1 571 BR L1 572 L48: 573 WORD $0xB3CD0030 //lgdr %r3,%f0 574 WORD $0xEC1320BF //risbgn %r1,%r3,64-32,128+63,64+0+32 575 BYTE $0x60 576 BYTE $0x59 577 MOVW R1, R6 578 CMPBEQ R6, $0, L29 579 WORD $0xB3120022 //ltdbr %f2,%f2 580 BLTU L50 581 FMOVD F2, F4 582 L14: 583 MOVD $·pow_x433<>+0(SB), R1 584 FMOVD 0(R1), F7 585 WFCHDBS V4, V7, V3 586 BEQ L15 587 WFADB V7, V4, V3 588 FSUB F7, F3 589 WFCEDBS V4, V3, V3 590 BEQ L15 591 WORD $0xB3120000 //ltdbr %f0,%f0 592 FMOVD 8(R9), F4 593 BNE L16 594 L13: 595 WORD $0xB3120022 //ltdbr %f2,%f2 596 BLT L18 597 L40: 598 FMOVD $0, F0 599 WFMDB V4, V0, V1 600 BR L1 601 L49: 602 WFMDB V0, V4, V1 603 BR L1 604 L29: 605 FMOVD 8(R9), F4 606 BR L13 607 L15: 608 MOVD $·pow_x434<>+0(SB), R1 609 FMOVD 0(R1), F7 610 WFCHDBS V4, V7, V3 611 BEQ L32 612 WFADB V7, V4, V3 613 FSUB F7, F3 614 WFCEDBS V4, V3, V4 615 BEQ L32 616 FMOVD 0(R9), F4 617 L17: 618 WORD $0xB3120000 //ltdbr %f0,%f0 619 BNE L12 620 BR L13 621 L32: 622 FMOVD 8(R9), F4 623 BR L17 624 L50: 625 WORD $0xB3130042 //lcdbr %f4,%f2 626 BR L14 627 xIsOne: // Pow(1, y) = 1 for any y 628 yIsOne: // Pow(x, 1) = x for any x 629 posInfGeZero: // Pow(+Inf, y) = +Inf for y > 0 630 MOVD R1, ret+16(FP) 631 RET 632 yIsNan: // Pow(NaN, y) = NaN 633 ltZeroInt: // Pow(x, y) = NaN for finite x < 0 and finite non-integer y 634 MOVD $NaN, R2 635 MOVD R2, ret+16(FP) 636 RET 637 negOnePosInf: // Pow(-1, ±Inf) = 1 638 negOneNegInf: 639 MOVD $PosOne, R3 640 MOVD R3, ret+16(FP) 641 RET 642 negZeroOddInt: 643 MOVD $NegInf, R3 644 MOVD R3, ret+16(FP) 645 RET 646 zeroNotOdd: // Pow(±0, y) = +Inf for finite y < 0 and not an odd integer 647 posZeroLtZero: // special case Pow(+0, y < 0) = +Inf 648 zeroNegInf: // Pow(±0, -Inf) = +Inf 649 MOVD $PosInf, R3 650 MOVD R3, ret+16(FP) 651 RET 652 gtOnePosInf: //Pow(x, +Inf) = +Inf for |x| > 1 653 ltNegOnePosInf: 654 MOVD R2, ret+16(FP) 655 RET 656 yIsZero: //Pow(x, ±0) = 1 for any x 657 MOVD $PosOne, R4 658 MOVD R4, ret+16(FP) 659 RET 660 negZeroOddIntGtZero: // Pow(-0, y) = -0 for y an odd integer > 0 661 MOVD $NegZero, R3 662 MOVD R3, ret+16(FP) 663 RET 664 zeroNotOddGtZero: // Pow(±0, y) = +0 for finite y > 0 and not an odd integer 665 MOVD $0, ret+16(FP) 666 RET