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| // 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
| WORD $0xEC5320AF //risbg %r5,%r3,32,128+47,0
| BYTE $0x00
| BYTE $0x55
| MOVH $0x0, R1
| WORD $0xEC15001F //risbgn %r1,%r5,64-64+0,64-64+0+32-1,64-0-32
| BYTE $0x20
| BYTE $0x59
| 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)
| WORD $0xEC3239BC //risbg %r3,%r2,57,128+60,64-13
| BYTE $0x33
| BYTE $0x55
| ANDW $0xFFFF0000, R2
| WORD $0xEC12001F //risbgn %r1,%r2,64-64+0,64-64+0+32-1,64-0-32
| BYTE $0x20
| BYTE $0x59
| 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
| WORD $0xEC3339BC //risbg %r3,%r3,57,128+60,0
| BYTE $0x00
| BYTE $0x55
| 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:
| WORD $0xEC2328B7 //risbg %r2,%r3,40,128+55,64-8
| BYTE $0x38
| BYTE $0x55
| WORD $0xEC3339BC //risbg %r3,%r3,57,128+60,64-13
| BYTE $0x33
| BYTE $0x55
| 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
|
|
