/* Function logf vectorized with AVX-512. KNL and SKX versions.
Copyright (C) 2014-2018 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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include "svml_s_logf_data.h"
#include "svml_s_wrapper_impl.h"
.text
ENTRY (_ZGVeN16v_logf_knl)
#ifndef HAVE_AVX512DQ_ASM_SUPPORT
WRAPPER_IMPL_AVX512 _ZGVdN8v_logf
#else
/*
ALGORITHM DESCRIPTION:
log(x) = exponent_x*log(2) + log(mantissa_x), if mantissa_x<4/3
log(x) = (exponent_x+1)*log(2) + log(0.5*mantissa_x), if mantissa_x>4/3
R = mantissa_x - 1, if mantissa_x<4/3
R = 0.5*mantissa_x - 1, if mantissa_x>4/3
|R|< 1/3
log(1+R) is approximated as a polynomial: degree 9 for 1-ulp,
degree 7 for 4-ulp, degree 3 for half-precision. */
pushq %rbp
cfi_adjust_cfa_offset (8)
cfi_rel_offset (%rbp, 0)
movq %rsp, %rbp
cfi_def_cfa_register (%rbp)
andq $-64, %rsp
subq $1280, %rsp
movq __svml_slog_data@GOTPCREL(%rip), %rax
movl $-1, %ecx
/* reduction: compute r,n */
vpsubd _iBrkValue(%rax), %zmm0, %zmm2
vmovups _sPoly_7(%rax), %zmm7
vpandd _iOffExpoMask(%rax), %zmm2, %zmm3
/* exponent_x (mantissa_x<4/3) or exponent_x+1 (mantissa_x>4/3) */
vpsrad $23, %zmm2, %zmm4
/* check for working range,
set special argument mask (denormals/zero/Inf/NaN)
*/
vpaddd _iHiDelta(%rax), %zmm0, %zmm1
/* mantissa_x (mantissa_x<4/3), or 0.5*mantissa_x (mantissa_x>4/3) */
vpaddd _iBrkValue(%rax), %zmm3, %zmm6
vpcmpd $1, _iLoRange(%rax), %zmm1, %k1
vcvtdq2ps {rn-sae}, %zmm4, %zmm1
/* reduced argument R */
vsubps _sOne(%rax), %zmm6, %zmm8
vpbroadcastd %ecx, %zmm5{%k1}{z}
/* polynomial evaluation starts here */
vfmadd213ps _sPoly_6(%rax), %zmm8, %zmm7
vptestmd %zmm5, %zmm5, %k0
kmovw %k0, %ecx
vfmadd213ps _sPoly_5(%rax), %zmm8, %zmm7
vfmadd213ps _sPoly_4(%rax), %zmm8, %zmm7
vfmadd213ps _sPoly_3(%rax), %zmm8, %zmm7
vfmadd213ps _sPoly_2(%rax), %zmm8, %zmm7
vfmadd213ps _sPoly_1(%rax), %zmm8, %zmm7
vmulps %zmm8, %zmm7, %zmm9
/* polynomial evaluation end */
vfmadd213ps %zmm8, %zmm8, %zmm9
/*
final reconstruction:
add exponent_value*log2 to polynomial result
*/
vfmadd132ps _sLn2(%rax), %zmm9, %zmm1
testl %ecx, %ecx
jne .LBL_1_3
.LBL_1_2:
cfi_remember_state
vmovaps %zmm1, %zmm0
movq %rbp, %rsp
cfi_def_cfa_register (%rsp)
popq %rbp
cfi_adjust_cfa_offset (-8)
cfi_restore (%rbp)
ret
.LBL_1_3:
cfi_restore_state
vmovups %zmm0, 1152(%rsp)
vmovups %zmm1, 1216(%rsp)
je .LBL_1_2
xorb %dl, %dl
kmovw %k4, 1048(%rsp)
xorl %eax, %eax
kmovw %k5, 1040(%rsp)
kmovw %k6, 1032(%rsp)
kmovw %k7, 1024(%rsp)
vmovups %zmm16, 960(%rsp)
vmovups %zmm17, 896(%rsp)
vmovups %zmm18, 832(%rsp)
vmovups %zmm19, 768(%rsp)
vmovups %zmm20, 704(%rsp)
vmovups %zmm21, 640(%rsp)
vmovups %zmm22, 576(%rsp)
vmovups %zmm23, 512(%rsp)
vmovups %zmm24, 448(%rsp)
vmovups %zmm25, 384(%rsp)
vmovups %zmm26, 320(%rsp)
vmovups %zmm27, 256(%rsp)
vmovups %zmm28, 192(%rsp)
vmovups %zmm29, 128(%rsp)
vmovups %zmm30, 64(%rsp)
vmovups %zmm31, (%rsp)
movq %rsi, 1064(%rsp)
movq %rdi, 1056(%rsp)
movq %r12, 1096(%rsp)
cfi_offset_rel_rsp (12, 1096)
movb %dl, %r12b
movq %r13, 1088(%rsp)
cfi_offset_rel_rsp (13, 1088)
movl %ecx, %r13d
movq %r14, 1080(%rsp)
cfi_offset_rel_rsp (14, 1080)
movl %eax, %r14d
movq %r15, 1072(%rsp)
cfi_offset_rel_rsp (15, 1072)
cfi_remember_state
.LBL_1_6:
btl %r14d, %r13d
jc .LBL_1_12
.LBL_1_7:
lea 1(%r14), %esi
btl %esi, %r13d
jc .LBL_1_10
.LBL_1_8:
addb $1, %r12b
addl $2, %r14d
cmpb $16, %r12b
jb .LBL_1_6
kmovw 1048(%rsp), %k4
movq 1064(%rsp), %rsi
kmovw 1040(%rsp), %k5
movq 1056(%rsp), %rdi
kmovw 1032(%rsp), %k6
movq 1096(%rsp), %r12
cfi_restore (%r12)
movq 1088(%rsp), %r13
cfi_restore (%r13)
kmovw 1024(%rsp), %k7
vmovups 960(%rsp), %zmm16
vmovups 896(%rsp), %zmm17
vmovups 832(%rsp), %zmm18
vmovups 768(%rsp), %zmm19
vmovups 704(%rsp), %zmm20
vmovups 640(%rsp), %zmm21
vmovups 576(%rsp), %zmm22
vmovups 512(%rsp), %zmm23
vmovups 448(%rsp), %zmm24
vmovups 384(%rsp), %zmm25
vmovups 320(%rsp), %zmm26
vmovups 256(%rsp), %zmm27
vmovups 192(%rsp), %zmm28
vmovups 128(%rsp), %zmm29
vmovups 64(%rsp), %zmm30
vmovups (%rsp), %zmm31
movq 1080(%rsp), %r14
cfi_restore (%r14)
movq 1072(%rsp), %r15
cfi_restore (%r15)
vmovups 1216(%rsp), %zmm1
jmp .LBL_1_2
.LBL_1_10:
cfi_restore_state
movzbl %r12b, %r15d
vmovss 1156(%rsp,%r15,8), %xmm0
call JUMPTARGET(__logf_finite)
vmovss %xmm0, 1220(%rsp,%r15,8)
jmp .LBL_1_8
.LBL_1_12:
movzbl %r12b, %r15d
vmovss 1152(%rsp,%r15,8), %xmm0
call JUMPTARGET(__logf_finite)
vmovss %xmm0, 1216(%rsp,%r15,8)
jmp .LBL_1_7
#endif
END (_ZGVeN16v_logf_knl)
ENTRY (_ZGVeN16v_logf_skx)
#ifndef HAVE_AVX512DQ_ASM_SUPPORT
WRAPPER_IMPL_AVX512 _ZGVdN8v_logf
#else
/*
ALGORITHM DESCRIPTION:
log(x) = exponent_x*log(2) + log(mantissa_x), if mantissa_x<4/3
log(x) = (exponent_x+1)*log(2) + log(0.5*mantissa_x), if mantissa_x>4/3
R = mantissa_x - 1, if mantissa_x<4/3
R = 0.5*mantissa_x - 1, if mantissa_x>4/3
|R|< 1/3
log(1+R) is approximated as a polynomial: degree 9 for 1-ulp,
degree 7 for 4-ulp, degree 3 for half-precision. */
pushq %rbp
cfi_adjust_cfa_offset (8)
cfi_rel_offset (%rbp, 0)
movq %rsp, %rbp
cfi_def_cfa_register (%rbp)
andq $-64, %rsp
subq $1280, %rsp
movq __svml_slog_data@GOTPCREL(%rip), %rax
vmovups .L_2il0floatpacket.7(%rip), %zmm6
vmovups _iBrkValue(%rax), %zmm4
vmovups _sPoly_7(%rax), %zmm8
/*
check for working range,
set special argument mask (denormals/zero/Inf/NaN)
*/
vpaddd _iHiDelta(%rax), %zmm0, %zmm1
/* reduction: compute r,n */
vpsubd %zmm4, %zmm0, %zmm2
vpcmpd $5, _iLoRange(%rax), %zmm1, %k1
/* exponent_x (mantissa_x<4/3) or exponent_x+1 (mantissa_x>4/3) */
vpsrad $23, %zmm2, %zmm5
vpandd _iOffExpoMask(%rax), %zmm2, %zmm3
/* mantissa_x (mantissa_x<4/3), or 0.5*mantissa_x (mantissa_x>4/3) */
vpaddd %zmm4, %zmm3, %zmm7
/* reduced argument R */
vsubps _sOne(%rax), %zmm7, %zmm9
/* polynomial evaluation starts here */
vfmadd213ps _sPoly_6(%rax), %zmm9, %zmm8
vfmadd213ps _sPoly_5(%rax), %zmm9, %zmm8
vfmadd213ps _sPoly_4(%rax), %zmm9, %zmm8
vfmadd213ps _sPoly_3(%rax), %zmm9, %zmm8
vfmadd213ps _sPoly_2(%rax), %zmm9, %zmm8
vfmadd213ps _sPoly_1(%rax), %zmm9, %zmm8
vmulps %zmm9, %zmm8, %zmm10
/* polynomial evaluation end */
vfmadd213ps %zmm9, %zmm9, %zmm10
vpandnd %zmm1, %zmm1, %zmm6{%k1}
vptestmd %zmm6, %zmm6, %k0
vcvtdq2ps {rn-sae}, %zmm5, %zmm1
kmovw %k0, %ecx
/*
final reconstruction:
add exponent_value*log2 to polynomial result
*/
vfmadd132ps _sLn2(%rax), %zmm10, %zmm1
testl %ecx, %ecx
jne .LBL_2_3
.LBL_2_2:
cfi_remember_state
vmovaps %zmm1, %zmm0
movq %rbp, %rsp
cfi_def_cfa_register (%rsp)
popq %rbp
cfi_adjust_cfa_offset (-8)
cfi_restore (%rbp)
ret
.LBL_2_3:
cfi_restore_state
vmovups %zmm0, 1152(%rsp)
vmovups %zmm1, 1216(%rsp)
je .LBL_2_2
xorb %dl, %dl
xorl %eax, %eax
kmovw %k4, 1048(%rsp)
kmovw %k5, 1040(%rsp)
kmovw %k6, 1032(%rsp)
kmovw %k7, 1024(%rsp)
vmovups %zmm16, 960(%rsp)
vmovups %zmm17, 896(%rsp)
vmovups %zmm18, 832(%rsp)
vmovups %zmm19, 768(%rsp)
vmovups %zmm20, 704(%rsp)
vmovups %zmm21, 640(%rsp)
vmovups %zmm22, 576(%rsp)
vmovups %zmm23, 512(%rsp)
vmovups %zmm24, 448(%rsp)
vmovups %zmm25, 384(%rsp)
vmovups %zmm26, 320(%rsp)
vmovups %zmm27, 256(%rsp)
vmovups %zmm28, 192(%rsp)
vmovups %zmm29, 128(%rsp)
vmovups %zmm30, 64(%rsp)
vmovups %zmm31, (%rsp)
movq %rsi, 1064(%rsp)
movq %rdi, 1056(%rsp)
movq %r12, 1096(%rsp)
cfi_offset_rel_rsp (12, 1096)
movb %dl, %r12b
movq %r13, 1088(%rsp)
cfi_offset_rel_rsp (13, 1088)
movl %ecx, %r13d
movq %r14, 1080(%rsp)
cfi_offset_rel_rsp (14, 1080)
movl %eax, %r14d
movq %r15, 1072(%rsp)
cfi_offset_rel_rsp (15, 1072)
cfi_remember_state
.LBL_2_6:
btl %r14d, %r13d
jc .LBL_2_12
.LBL_2_7:
lea 1(%r14), %esi
btl %esi, %r13d
jc .LBL_2_10
.LBL_2_8:
incb %r12b
addl $2, %r14d
cmpb $16, %r12b
jb .LBL_2_6
kmovw 1048(%rsp), %k4
kmovw 1040(%rsp), %k5
kmovw 1032(%rsp), %k6
kmovw 1024(%rsp), %k7
vmovups 960(%rsp), %zmm16
vmovups 896(%rsp), %zmm17
vmovups 832(%rsp), %zmm18
vmovups 768(%rsp), %zmm19
vmovups 704(%rsp), %zmm20
vmovups 640(%rsp), %zmm21
vmovups 576(%rsp), %zmm22
vmovups 512(%rsp), %zmm23
vmovups 448(%rsp), %zmm24
vmovups 384(%rsp), %zmm25
vmovups 320(%rsp), %zmm26
vmovups 256(%rsp), %zmm27
vmovups 192(%rsp), %zmm28
vmovups 128(%rsp), %zmm29
vmovups 64(%rsp), %zmm30
vmovups (%rsp), %zmm31
vmovups 1216(%rsp), %zmm1
movq 1064(%rsp), %rsi
movq 1056(%rsp), %rdi
movq 1096(%rsp), %r12
cfi_restore (%r12)
movq 1088(%rsp), %r13
cfi_restore (%r13)
movq 1080(%rsp), %r14
cfi_restore (%r14)
movq 1072(%rsp), %r15
cfi_restore (%r15)
jmp .LBL_2_2
.LBL_2_10:
cfi_restore_state
movzbl %r12b, %r15d
vmovss 1156(%rsp,%r15,8), %xmm0
vzeroupper
vmovss 1156(%rsp,%r15,8), %xmm0
call JUMPTARGET(__logf_finite)
vmovss %xmm0, 1220(%rsp,%r15,8)
jmp .LBL_2_8
.LBL_2_12:
movzbl %r12b, %r15d
vmovss 1152(%rsp,%r15,8), %xmm0
vzeroupper
vmovss 1152(%rsp,%r15,8), %xmm0
call JUMPTARGET(__logf_finite)
vmovss %xmm0, 1216(%rsp,%r15,8)
jmp .LBL_2_7
#endif
END (_ZGVeN16v_logf_skx)
.section .rodata, "a"
.L_2il0floatpacket.7:
.long 0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff,0xffffffff
.type .L_2il0floatpacket.7,@object