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atanh_s390x.s
// Copyright 2017 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. #include "textflag.h" // Minimax polynomial coefficients and other constants DATA ·atanhrodataL10<> + 0(SB)/8, $.41375273347623353626 DATA ·atanhrodataL10<> + 8(SB)/8, $.51487302528619766235E+04 DATA ·atanhrodataL10<> + 16(SB)/8, $-1.67526912689208984375 DATA ·atanhrodataL10<> + 24(SB)/8, $0.181818181818181826E+00 DATA ·atanhrodataL10<> + 32(SB)/8, $-.165289256198351540E-01 DATA ·atanhrodataL10<> + 40(SB)/8, $0.200350613573012186E-02 DATA ·atanhrodataL10<> + 48(SB)/8, $0.397389654305194527E-04 DATA ·atanhrodataL10<> + 56(SB)/8, $-.273205381970859341E-03 DATA ·atanhrodataL10<> + 64(SB)/8, $0.938370938292558173E-06 DATA ·atanhrodataL10<> + 72(SB)/8, $-.148682720127920854E-06 DATA ·atanhrodataL10<> + 80(SB)/8, $ 0.212881813645679599E-07 DATA ·atanhrodataL10<> + 88(SB)/8, $-.602107458843052029E-05 DATA ·atanhrodataL10<> + 96(SB)/8, $-5.5 DATA ·atanhrodataL10<> + 104(SB)/8, $-0.5 DATA ·atanhrodataL10<> + 112(SB)/8, $0.0 DATA ·atanhrodataL10<> + 120(SB)/8, $0x7ff8000000000000 //Nan DATA ·atanhrodataL10<> + 128(SB)/8, $-1.0 DATA ·atanhrodataL10<> + 136(SB)/8, $1.0 DATA ·atanhrodataL10<> + 144(SB)/8, $1.0E-20 GLOBL ·atanhrodataL10<> + 0(SB), RODATA, $152 // Table of log correction terms DATA ·atanhtab2076<> + 0(SB)/8, $0.585235384085551248E-01 DATA ·atanhtab2076<> + 8(SB)/8, $0.412206153771168640E-01 DATA ·atanhtab2076<> + 16(SB)/8, $0.273839003221648339E-01 DATA ·atanhtab2076<> + 24(SB)/8, $0.166383778368856480E-01 DATA ·atanhtab2076<> + 32(SB)/8, $0.866678223433169637E-02 DATA ·atanhtab2076<> + 40(SB)/8, $0.319831684989627514E-02 DATA ·atanhtab2076<> + 48(SB)/8, $0.000000000000000000E+00 DATA ·atanhtab2076<> + 56(SB)/8, $-.113006378583725549E-02 DATA ·atanhtab2076<> + 64(SB)/8, $-.367979419636602491E-03 DATA ·atanhtab2076<> + 72(SB)/8, $0.213172484510484979E-02 DATA ·atanhtab2076<> + 80(SB)/8, $0.623271047682013536E-02 DATA ·atanhtab2076<> + 88(SB)/8, $0.118140812789696885E-01 DATA ·atanhtab2076<> + 96(SB)/8, $0.187681358930914206E-01 DATA ·atanhtab2076<> + 104(SB)/8, $0.269985148668178992E-01 DATA ·atanhtab2076<> + 112(SB)/8, $0.364186619761331328E-01 DATA ·atanhtab2076<> + 120(SB)/8, $0.469505379381388441E-01 GLOBL ·atanhtab2076<> + 0(SB), RODATA, $128 // Table of +/- .5 DATA ·atanhtabh2075<> + 0(SB)/8, $0.5 DATA ·atanhtabh2075<> + 8(SB)/8, $-.5 GLOBL ·atanhtabh2075<> + 0(SB), RODATA, $16 // Atanh returns the inverse hyperbolic tangent of the argument. // // Special cases are: // Atanh(1) = +Inf // Atanh(±0) = ±0 // Atanh(-1) = -Inf // Atanh(x) = NaN if x < -1 or x > 1 // Atanh(NaN) = NaN // The algorithm used is minimax polynomial approximation // with coefficients determined with a Remez exchange algorithm. TEXT ·atanhAsm(SB), NOSPLIT, $0-16 FMOVD x+0(FP), F0 MOVD $·atanhrodataL10<>+0(SB), R5 LGDR F0, R1 WORD $0xC0393FEF //iilf %r3,1072693247 BYTE $0xFF BYTE $0xFF SRAD $32, R1 WORD $0xB9170021 //llgtr %r2,%r1 MOVW R2, R6 MOVW R3, R7 CMPBGT R6, R7, L2 WORD $0xC0392FFF //iilf %r3,805306367 BYTE $0xFF BYTE $0xFF MOVW R2, R6 MOVW R3, R7 CMPBGT R6, R7, L9 L3: FMOVD 144(R5), F2 FMADD F2, F0, F0 L1: FMOVD F0, ret+8(FP) RET L2: WORD $0xED005088 //cdb %f0,.L12-.L10(%r5) BYTE $0x00 BYTE $0x19 BEQ L5 WORD $0xED005080 //cdb %f0,.L13-.L10(%r5) BYTE $0x00 BYTE $0x19 BEQ L5 WFCEDBS V0, V0, V2 BVS L1 FMOVD 120(R5), F0 BR L1 L5: WORD $0xED005070 //ddb %f0,.L15-.L10(%r5) BYTE $0x00 BYTE $0x1D FMOVD F0, ret+8(FP) RET L9: FMOVD F0, F2 MOVD $·atanhtabh2075<>+0(SB), R2 SRW $31, R1, R1 FMOVD 104(R5), F4 MOVW R1, R1 SLD $3, R1, R1 WORD $0x68012000 //ld %f0,0(%r1,%r2) WFMADB V2, V4, V0, V4 VLEG $0, 96(R5), V16 FDIV F4, F2 WORD $0xC0298006 //iilf %r2,2147909631 BYTE $0x7F BYTE $0xFF FMOVD 88(R5), F6 FMOVD 80(R5), F1 FMOVD 72(R5), F7 FMOVD 64(R5), F5 FMOVD F2, F4 WORD $0xED405088 //adb %f4,.L12-.L10(%r5) BYTE $0x00 BYTE $0x1A LGDR F4, R4 SRAD $32, R4 FMOVD F4, F3 WORD $0xED305088 //sdb %f3,.L12-.L10(%r5) BYTE $0x00 BYTE $0x1B SUBW R4, R2 WFSDB V3, V2, V3 RISBGZ $32, $47, $0, R2, R1 SLD $32, R1, R1 LDGR R1, F2 WFMADB V4, V2, V16, V4 SRAW $8, R2, R1 WFMADB V4, V5, V6, V5 WFMDB V4, V4, V6 WFMADB V4, V1, V7, V1 WFMADB V2, V3, V4, V2 WFMADB V1, V6, V5, V1 FMOVD 56(R5), F3 FMOVD 48(R5), F5 WFMADB V4, V5, V3, V4 FMOVD 40(R5), F3 FMADD F1, F6, F4 FMOVD 32(R5), F1 FMADD F3, F2, F1 ANDW $0xFFFFFF00, R1 WFMADB V6, V4, V1, V6 FMOVD 24(R5), F3 ORW $0x45000000, R1 WFMADB V2, V6, V3, V6 VLVGF $0, R1, V4 LDEBR F4, F4 RISBGZ $57, $60, $51, R2, R2 MOVD $·atanhtab2076<>+0(SB), R1 FMOVD 16(R5), F3 WORD $0x68521000 //ld %f5,0(%r2,%r1) FMOVD 8(R5), F1 WFMADB V2, V6, V5, V2 WFMADB V4, V3, V1, V4 FMOVD 0(R5), F6 FMADD F6, F4, F2 FMUL F2, F0 FMOVD F0, ret+8(FP) RET
SIMPAN
BATAL