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/* Function log10f vectorized with AVX-512.
Copyright (C) 2021-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
https://www.gnu.org/licenses/. */
/*
* ALGORITHM DESCRIPTION:
*
* Get short reciprocal approximation Rcp ~ 1/mantissa(x)
* R = Rcp*x - 1.0
* log10(x) = k*log10(2.0) - log10(Rcp) + poly_approximation(R)
* log10(Rcp) is tabulated
*
*
*/
/* Offsets for data table __svml_slog10_data_internal_avx512
*/
#define One 0
#define coeff4 64
#define coeff3 128
#define coeff2 192
#define coeff1 256
#define L2 320
#include <sysdep.h>
.text
.section .text.exex512,"ax",@progbits
ENTRY(_ZGVeN16v_log10f_skx)
pushq %rbp
cfi_def_cfa_offset(16)
movq %rsp, %rbp
cfi_def_cfa(6, 16)
cfi_offset(6, -16)
andq $-64, %rsp
subq $192, %rsp
vgetmantps $11, {sae}, %zmm0, %zmm3
vmovups __svml_slog10_data_internal_avx512(%rip), %zmm1
vgetexpps {sae}, %zmm0, %zmm5
vmovups L2+__svml_slog10_data_internal_avx512(%rip), %zmm10
vpsrld $19, %zmm3, %zmm7
vgetexpps {sae}, %zmm3, %zmm6
vsubps {rn-sae}, %zmm1, %zmm3, %zmm11
vpermps coeff4+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm1
vpermps coeff3+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm2
vsubps {rn-sae}, %zmm6, %zmm5, %zmm9
vpermps coeff2+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm4
vpermps coeff1+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm8
/* x<=0? */
vfpclassps $94, %zmm0, %k0
vfmadd213ps {rn-sae}, %zmm2, %zmm11, %zmm1
vmulps {rn-sae}, %zmm10, %zmm9, %zmm12
vfmadd213ps {rn-sae}, %zmm4, %zmm11, %zmm1
kmovw %k0, %edx
vfmadd213ps {rn-sae}, %zmm8, %zmm11, %zmm1
vfmadd213ps {rn-sae}, %zmm12, %zmm11, %zmm1
testl %edx, %edx
/* Go to special inputs processing branch */
jne L(SPECIAL_VALUES_BRANCH)
# LOE rbx r12 r13 r14 r15 edx zmm0 zmm1
/* Restore registers
* and exit the function
*/
L(EXIT):
vmovaps %zmm1, %zmm0
movq %rbp, %rsp
popq %rbp
cfi_def_cfa(7, 8)
cfi_restore(6)
ret
cfi_def_cfa(6, 16)
cfi_offset(6, -16)
/* Branch to process
* special inputs
*/
L(SPECIAL_VALUES_BRANCH):
vmovups %zmm0, 64(%rsp)
vmovups %zmm1, 128(%rsp)
# LOE rbx r12 r13 r14 r15 edx zmm1
xorl %eax, %eax
# LOE rbx r12 r13 r14 r15 eax edx
vzeroupper
movq %r12, 16(%rsp)
/* DW_CFA_expression: r12 (r12) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -176; DW_OP_plus) */
.cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 0xff, 0xff, 0xff, 0x22
movl %eax, %r12d
movq %r13, 8(%rsp)
/* DW_CFA_expression: r13 (r13) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -184; DW_OP_plus) */
.cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 0xff, 0xff, 0xff, 0x22
movl %edx, %r13d
movq %r14, (%rsp)
/* DW_CFA_expression: r14 (r14) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -192; DW_OP_plus) */
.cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22
# LOE rbx r15 r12d r13d
/* Range mask
* bits check
*/
L(RANGEMASK_CHECK):
btl %r12d, %r13d
/* Call scalar math function */
jc L(SCALAR_MATH_CALL)
# LOE rbx r15 r12d r13d
/* Special inputs
* processing loop
*/
L(SPECIAL_VALUES_LOOP):
incl %r12d
cmpl $16, %r12d
/* Check bits in range mask */
jl L(RANGEMASK_CHECK)
# LOE rbx r15 r12d r13d
movq 16(%rsp), %r12
cfi_restore(12)
movq 8(%rsp), %r13
cfi_restore(13)
movq (%rsp), %r14
cfi_restore(14)
vmovups 128(%rsp), %zmm1
/* Go to exit */
jmp L(EXIT)
/* DW_CFA_expression: r12 (r12) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -176; DW_OP_plus) */
.cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 0xff, 0xff, 0xff, 0x22
/* DW_CFA_expression: r13 (r13) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -184; DW_OP_plus) */
.cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 0xff, 0xff, 0xff, 0x22
/* DW_CFA_expression: r14 (r14) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -192; DW_OP_plus) */
.cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22
# LOE rbx r12 r13 r14 r15 zmm1
/* Scalar math fucntion call
* to process special input
*/
L(SCALAR_MATH_CALL):
movl %r12d, %r14d
movss 64(%rsp,%r14,4), %xmm0
call log10f@PLT
# LOE rbx r14 r15 r12d r13d xmm0
movss %xmm0, 128(%rsp,%r14,4)
/* Process special inputs in loop */
jmp L(SPECIAL_VALUES_LOOP)
# LOE rbx r15 r12d r13d
END(_ZGVeN16v_log10f_skx)
.section .rodata, "a"
.align 64
#ifdef __svml_slog10_data_internal_avx512_typedef
typedef unsigned int VUINT32;
typedef struct {
__declspec(align(64)) VUINT32 One[16][1];
__declspec(align(64)) VUINT32 coeff4[16][1];
__declspec(align(64)) VUINT32 coeff3[16][1];
__declspec(align(64)) VUINT32 coeff2[16][1];
__declspec(align(64)) VUINT32 coeff1[16][1];
__declspec(align(64)) VUINT32 L2[16][1];
} __svml_slog10_data_internal_avx512;
#endif
__svml_slog10_data_internal_avx512:
/*== One ==*/
.long 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000
// c4
.align 64
.long 0xbdc9ae9b, 0xbda6fcf4
.long 0xbd8bac76, 0xbd6bca30
.long 0xbd48a99b, 0xbd2c0a9f
.long 0xbd1480db, 0xbd00faf2
.long 0xbe823aa9, 0xbe656348
.long 0xbe4afbb9, 0xbe346895
.long 0xbe20ffff, 0xbe103a0b
.long 0xbe01a91c, 0xbde9e84e
// c3
.align 64
.long 0x3e13d888, 0x3e10a87c
.long 0x3e0b95c3, 0x3e057f0b
.long 0x3dfde038, 0x3df080d9
.long 0x3de34c1e, 0x3dd68333
.long 0x3dac6e8e, 0x3dd54a51
.long 0x3df30f40, 0x3e04235d
.long 0x3e0b7033, 0x3e102c90
.long 0x3e12ebad, 0x3e141ff8
// c2
.align 64
.long 0xbe5e5a9b, 0xbe5e2677
.long 0xbe5d83f5, 0xbe5c6016
.long 0xbe5abd0b, 0xbe58a6fd
.long 0xbe562e02, 0xbe5362f8
.long 0xbe68e27c, 0xbe646747
.long 0xbe619a73, 0xbe5ff05a
.long 0xbe5f0570, 0xbe5e92d0
.long 0xbe5e662b, 0xbe5e5c08
// c1
.align 64
.long 0x3ede5bd8, 0x3ede5b45
.long 0x3ede57d8, 0x3ede4eb1
.long 0x3ede3d37, 0x3ede2166
.long 0x3eddf9d9, 0x3eddc5bb
.long 0x3ede08ed, 0x3ede32e7
.long 0x3ede4967, 0x3ede5490
.long 0x3ede597f, 0x3ede5b50
.long 0x3ede5bca, 0x3ede5bd9
/*== L2 ==*/
.align 64
.long 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b
.align 64
.type __svml_slog10_data_internal_avx512,@object
.size __svml_slog10_data_internal_avx512,.-__svml_slog10_data_internal_avx512
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