| // Copyright 2016 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 log10rodataL19<>+0(SB)/8, $0.000000000000000000E+00 |
| DATA log10rodataL19<>+8(SB)/8, $-1.0 |
| DATA log10rodataL19<>+16(SB)/8, $0x7FF8000000000000 //+NanN |
| DATA log10rodataL19<>+24(SB)/8, $.15375570329280596749 |
| DATA log10rodataL19<>+32(SB)/8, $.60171950900703668594E+04 |
| DATA log10rodataL19<>+40(SB)/8, $-1.9578460454940795898 |
| DATA log10rodataL19<>+48(SB)/8, $0.78962633073318517310E-01 |
| DATA log10rodataL19<>+56(SB)/8, $-.71784211884836937993E-02 |
| DATA log10rodataL19<>+64(SB)/8, $0.87011165920689940661E-03 |
| DATA log10rodataL19<>+72(SB)/8, $-.11865158981621437541E-03 |
| DATA log10rodataL19<>+80(SB)/8, $0.17258413403018680410E-04 |
| DATA log10rodataL19<>+88(SB)/8, $0.40752932047883484315E-06 |
| DATA log10rodataL19<>+96(SB)/8, $-.26149194688832680410E-05 |
| DATA log10rodataL19<>+104(SB)/8, $0.92453396963875026759E-08 |
| DATA log10rodataL19<>+112(SB)/8, $-.64572084905921579630E-07 |
| DATA log10rodataL19<>+120(SB)/8, $-5.5 |
| DATA log10rodataL19<>+128(SB)/8, $18446744073709551616. |
| GLOBL log10rodataL19<>+0(SB), RODATA, $136 |
| |
| // Table of log10 correction terms |
| DATA log10tab2074<>+0(SB)/8, $0.254164497922885069E-01 |
| DATA log10tab2074<>+8(SB)/8, $0.179018857989381839E-01 |
| DATA log10tab2074<>+16(SB)/8, $0.118926768029048674E-01 |
| DATA log10tab2074<>+24(SB)/8, $0.722595568238080033E-02 |
| DATA log10tab2074<>+32(SB)/8, $0.376393570022739135E-02 |
| DATA log10tab2074<>+40(SB)/8, $0.138901135928814326E-02 |
| DATA log10tab2074<>+48(SB)/8, $0 |
| DATA log10tab2074<>+56(SB)/8, $-0.490780466387818203E-03 |
| DATA log10tab2074<>+64(SB)/8, $-0.159811431402137571E-03 |
| DATA log10tab2074<>+72(SB)/8, $0.925796337165100494E-03 |
| DATA log10tab2074<>+80(SB)/8, $0.270683176738357035E-02 |
| DATA log10tab2074<>+88(SB)/8, $0.513079030821304758E-02 |
| DATA log10tab2074<>+96(SB)/8, $0.815089785397996303E-02 |
| DATA log10tab2074<>+104(SB)/8, $0.117253060262419215E-01 |
| DATA log10tab2074<>+112(SB)/8, $0.158164239345343963E-01 |
| DATA log10tab2074<>+120(SB)/8, $0.203903595489229786E-01 |
| GLOBL log10tab2074<>+0(SB), RODATA, $128 |
| |
| // Log10 returns the decimal logarithm of the argument. |
| // |
| // Special cases are: |
| // Log(+Inf) = +Inf |
| // Log(0) = -Inf |
| // Log(x < 0) = NaN |
| // Log(NaN) = NaN |
| // The algorithm used is minimax polynomial approximation |
| // with coefficients determined with a Remez exchange algorithm. |
| |
| TEXT ·log10Asm(SB),NOSPLIT,$8-16 |
| FMOVD x+0(FP), F0 |
| MOVD $log10rodataL19<>+0(SB), R9 |
| FMOVD F0, x-8(SP) |
| WORD $0xC0298006 //iilf %r2,2147909631 |
| BYTE $0x7F |
| BYTE $0xFF |
| WORD $0x5840F008 //l %r4, 8(%r15) |
| SUBW R4, R2, R3 |
| RISBGZ $32, $47, $0, R3, R5 |
| MOVH $0x0, R1 |
| RISBGN $0, $31, $32, R5, R1 |
| WORD $0xC0590016 //iilf %r5,1507327 |
| BYTE $0xFF |
| BYTE $0xFF |
| MOVW R4, R10 |
| MOVW R5, R11 |
| CMPBLE R10, R11, L2 |
| WORD $0xC0297FEF //iilf %r2,2146435071 |
| BYTE $0xFF |
| BYTE $0xFF |
| MOVW R4, R10 |
| MOVW R2, R11 |
| CMPBLE R10, R11, L16 |
| L3: |
| L1: |
| FMOVD F0, ret+8(FP) |
| RET |
| |
| L2: |
| LTDBR F0, F0 |
| BLEU L13 |
| WORD $0xED009080 //mdb %f0,.L20-.L19(%r9) |
| BYTE $0x00 |
| BYTE $0x1C |
| FMOVD F0, x-8(SP) |
| WORD $0x5B20F008 //s %r2, 8(%r15) |
| RISBGZ $57, $60, $51, R2, R3 |
| ANDW $0xFFFF0000, R2 |
| RISBGN $0, $31, $32, R2, R1 |
| ADDW $0x4000000, R2 |
| BLEU L17 |
| L8: |
| SRW $8, R2, R2 |
| ORW $0x45000000, R2 |
| L4: |
| FMOVD log10rodataL19<>+120(SB), F2 |
| LDGR R1, F4 |
| WFMADB V4, V0, V2, V0 |
| FMOVD log10rodataL19<>+112(SB), F4 |
| FMOVD log10rodataL19<>+104(SB), F6 |
| WFMADB V0, V6, V4, V6 |
| FMOVD log10rodataL19<>+96(SB), F4 |
| FMOVD log10rodataL19<>+88(SB), F1 |
| WFMADB V0, V1, V4, V1 |
| WFMDB V0, V0, V4 |
| FMOVD log10rodataL19<>+80(SB), F2 |
| WFMADB V6, V4, V1, V6 |
| FMOVD log10rodataL19<>+72(SB), F1 |
| WFMADB V0, V2, V1, V2 |
| FMOVD log10rodataL19<>+64(SB), F1 |
| RISBGZ $57, $60, $0, R3, R3 |
| WFMADB V4, V6, V2, V6 |
| FMOVD log10rodataL19<>+56(SB), F2 |
| WFMADB V0, V1, V2, V1 |
| VLVGF $0, R2, V2 |
| WFMADB V4, V6, V1, V4 |
| LDEBR F2, F2 |
| FMOVD log10rodataL19<>+48(SB), F6 |
| WFMADB V0, V4, V6, V4 |
| FMOVD log10rodataL19<>+40(SB), F1 |
| FMOVD log10rodataL19<>+32(SB), F6 |
| MOVD $log10tab2074<>+0(SB), R1 |
| WFMADB V2, V1, V6, V2 |
| WORD $0x68331000 //ld %f3,0(%r3,%r1) |
| WFMADB V0, V4, V3, V0 |
| FMOVD log10rodataL19<>+24(SB), F4 |
| FMADD F4, F2, F0 |
| FMOVD F0, ret+8(FP) |
| RET |
| |
| L16: |
| RISBGZ $40, $55, $56, R3, R2 |
| RISBGZ $57, $60, $51, R3, R3 |
| ORW $0x45000000, R2 |
| BR L4 |
| L13: |
| BGE L18 //jnl .L18 |
| BVS L18 |
| FMOVD log10rodataL19<>+16(SB), F0 |
| BR L1 |
| L17: |
| SRAW $1, R2, R2 |
| SUBW $0x40000000, R2 |
| BR L8 |
| L18: |
| FMOVD log10rodataL19<>+8(SB), F0 |
| WORD $0xED009000 //ddb %f0,.L36-.L19(%r9) |
| BYTE $0x00 |
| BYTE $0x1D |
| BR L1 |
