| // 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 ·cbrtrodataL9<> + 0(SB)/8, $-.00016272731015974436E+00 |
| DATA ·cbrtrodataL9<> + 8(SB)/8, $0.66639548758285293179E+00 |
| DATA ·cbrtrodataL9<> + 16(SB)/8, $0.55519402697349815993E+00 |
| DATA ·cbrtrodataL9<> + 24(SB)/8, $0.49338566048766782004E+00 |
| DATA ·cbrtrodataL9<> + 32(SB)/8, $0.45208160036325611486E+00 |
| DATA ·cbrtrodataL9<> + 40(SB)/8, $0.43099892837778637816E+00 |
| DATA ·cbrtrodataL9<> + 48(SB)/8, $1.000244140625 |
| DATA ·cbrtrodataL9<> + 56(SB)/8, $0.33333333333333333333E+00 |
| DATA ·cbrtrodataL9<> + 64(SB)/8, $79228162514264337593543950336. |
| GLOBL ·cbrtrodataL9<> + 0(SB), RODATA, $72 |
| |
| // Index tables |
| DATA ·cbrttab32069<> + 0(SB)/8, $0x404030303020202 |
| DATA ·cbrttab32069<> + 8(SB)/8, $0x101010101000000 |
| DATA ·cbrttab32069<> + 16(SB)/8, $0x808070706060605 |
| DATA ·cbrttab32069<> + 24(SB)/8, $0x505040404040303 |
| DATA ·cbrttab32069<> + 32(SB)/8, $0xe0d0c0c0b0b0b0a |
| DATA ·cbrttab32069<> + 40(SB)/8, $0xa09090908080808 |
| DATA ·cbrttab32069<> + 48(SB)/8, $0x11111010100f0f0f |
| DATA ·cbrttab32069<> + 56(SB)/8, $0xe0e0e0e0e0d0d0d |
| DATA ·cbrttab32069<> + 64(SB)/8, $0x1515141413131312 |
| DATA ·cbrttab32069<> + 72(SB)/8, $0x1212111111111010 |
| GLOBL ·cbrttab32069<> + 0(SB), RODATA, $80 |
| |
| DATA ·cbrttab22068<> + 0(SB)/8, $0x151015001420141 |
| DATA ·cbrttab22068<> + 8(SB)/8, $0x140013201310130 |
| DATA ·cbrttab22068<> + 16(SB)/8, $0x122012101200112 |
| DATA ·cbrttab22068<> + 24(SB)/8, $0x111011001020101 |
| DATA ·cbrttab22068<> + 32(SB)/8, $0x10000f200f100f0 |
| DATA ·cbrttab22068<> + 40(SB)/8, $0xe200e100e000d2 |
| DATA ·cbrttab22068<> + 48(SB)/8, $0xd100d000c200c1 |
| DATA ·cbrttab22068<> + 56(SB)/8, $0xc000b200b100b0 |
| DATA ·cbrttab22068<> + 64(SB)/8, $0xa200a100a00092 |
| DATA ·cbrttab22068<> + 72(SB)/8, $0x91009000820081 |
| DATA ·cbrttab22068<> + 80(SB)/8, $0x80007200710070 |
| DATA ·cbrttab22068<> + 88(SB)/8, $0x62006100600052 |
| DATA ·cbrttab22068<> + 96(SB)/8, $0x51005000420041 |
| DATA ·cbrttab22068<> + 104(SB)/8, $0x40003200310030 |
| DATA ·cbrttab22068<> + 112(SB)/8, $0x22002100200012 |
| DATA ·cbrttab22068<> + 120(SB)/8, $0x11001000020001 |
| GLOBL ·cbrttab22068<> + 0(SB), RODATA, $128 |
| |
| DATA ·cbrttab12067<> + 0(SB)/8, $0x53e1529051324fe1 |
| DATA ·cbrttab12067<> + 8(SB)/8, $0x4e904d324be14a90 |
| DATA ·cbrttab12067<> + 16(SB)/8, $0x493247e146904532 |
| DATA ·cbrttab12067<> + 24(SB)/8, $0x43e1429041323fe1 |
| DATA ·cbrttab12067<> + 32(SB)/8, $0x3e903d323be13a90 |
| DATA ·cbrttab12067<> + 40(SB)/8, $0x393237e136903532 |
| DATA ·cbrttab12067<> + 48(SB)/8, $0x33e1329031322fe1 |
| DATA ·cbrttab12067<> + 56(SB)/8, $0x2e902d322be12a90 |
| DATA ·cbrttab12067<> + 64(SB)/8, $0xd3e1d290d132cfe1 |
| DATA ·cbrttab12067<> + 72(SB)/8, $0xce90cd32cbe1ca90 |
| DATA ·cbrttab12067<> + 80(SB)/8, $0xc932c7e1c690c532 |
| DATA ·cbrttab12067<> + 88(SB)/8, $0xc3e1c290c132bfe1 |
| DATA ·cbrttab12067<> + 96(SB)/8, $0xbe90bd32bbe1ba90 |
| DATA ·cbrttab12067<> + 104(SB)/8, $0xb932b7e1b690b532 |
| DATA ·cbrttab12067<> + 112(SB)/8, $0xb3e1b290b132afe1 |
| DATA ·cbrttab12067<> + 120(SB)/8, $0xae90ad32abe1aa90 |
| GLOBL ·cbrttab12067<> + 0(SB), RODATA, $128 |
| |
| // Cbrt returns the cube root of the argument. |
| // |
| // Special cases are: |
| // Cbrt(±0) = ±0 |
| // Cbrt(±Inf) = ±Inf |
| // Cbrt(NaN) = NaN |
| // The algorithm used is minimax polynomial approximation |
| // with coefficients determined with a Remez exchange algorithm. |
| |
| TEXT ·cbrtAsm(SB), NOSPLIT, $0-16 |
| FMOVD x+0(FP), F0 |
| MOVD $·cbrtrodataL9<>+0(SB), R9 |
| LGDR F0, R2 |
| WORD $0xC039000F //iilf %r3,1048575 |
| BYTE $0xFF |
| BYTE $0xFF |
| SRAD $32, R2 |
| WORD $0xB9170012 //llgtr %r1,%r2 |
| MOVW R1, R6 |
| MOVW R3, R7 |
| CMPBLE R6, R7, L2 |
| WORD $0xC0397FEF //iilf %r3,2146435071 |
| BYTE $0xFF |
| BYTE $0xFF |
| MOVW R3, R7 |
| CMPBLE R6, R7, L8 |
| L1: |
| FMOVD F0, ret+8(FP) |
| RET |
| L3: |
| L2: |
| LTDBR F0, F0 |
| BEQ L1 |
| FMOVD F0, F2 |
| WORD $0xED209040 //mdb %f2,.L10-.L9(%r9) |
| BYTE $0x00 |
| BYTE $0x1C |
| MOVH $0x200, R4 |
| LGDR F2, R2 |
| SRAD $32, R2 |
| L4: |
| RISBGZ $57, $62, $39, R2, R3 |
| MOVD $·cbrttab12067<>+0(SB), R1 |
| WORD $0x48131000 //lh %r1,0(%r3,%r1) |
| RISBGZ $57, $62, $45, R2, R3 |
| MOVD $·cbrttab22068<>+0(SB), R5 |
| RISBGNZ $60, $63, $48, R2, R2 |
| WORD $0x4A135000 //ah %r1,0(%r3,%r5) |
| BYTE $0x18 //lr %r3,%r1 |
| BYTE $0x31 |
| MOVD $·cbrttab32069<>+0(SB), R1 |
| FMOVD 56(R9), F1 |
| FMOVD 48(R9), F5 |
| WORD $0xEC23393B //rosbg %r2,%r3,57,59,4 |
| BYTE $0x04 |
| BYTE $0x56 |
| WORD $0xE3121000 //llc %r1,0(%r2,%r1) |
| BYTE $0x00 |
| BYTE $0x94 |
| ADDW R3, R1 |
| ADDW R4, R1 |
| SLW $16, R1, R1 |
| SLD $32, R1, R1 |
| LDGR R1, F2 |
| WFMDB V2, V2, V4 |
| WFMDB V4, V0, V6 |
| WFMSDB V4, V6, V2, V4 |
| FMOVD 40(R9), F6 |
| FMSUB F1, F4, F2 |
| FMOVD 32(R9), F4 |
| WFMDB V2, V2, V3 |
| FMOVD 24(R9), F1 |
| FMUL F3, F0 |
| FMOVD 16(R9), F3 |
| WFMADB V2, V0, V5, V2 |
| FMOVD 8(R9), F5 |
| FMADD F6, F2, F4 |
| WFMADB V2, V1, V3, V1 |
| WFMDB V2, V2, V6 |
| FMOVD 0(R9), F3 |
| WFMADB V4, V6, V1, V4 |
| WFMADB V2, V5, V3, V2 |
| FMADD F4, F6, F2 |
| FMADD F2, F0, F0 |
| FMOVD F0, ret+8(FP) |
| RET |
| L8: |
| MOVH $0x0, R4 |
| BR L4 |
