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/* Function cos vectorized with AVX2.
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_d_trig_data.h"
.text
ENTRY (_ZGVdN4v_cos_avx2)
/* ALGORITHM DESCRIPTION:
( low accuracy ( < 4ulp ) or enhanced performance
( half of correct mantissa ) implementation )
Argument representation:
arg + Pi/2 = (N*Pi + R)
Result calculation:
cos(arg) = sin(arg+Pi/2) = sin(N*Pi + R) = (-1)^N * sin(R)
sin(R) is approximated by corresponding polynomial
*/
pushq %rbp
cfi_adjust_cfa_offset (8)
cfi_rel_offset (%rbp, 0)
movq %rsp, %rbp
cfi_def_cfa_register (%rbp)
andq $-64, %rsp
subq $448, %rsp
movq __svml_d_trig_data@GOTPCREL(%rip), %rax
vmovapd %ymm0, %ymm1
vmovupd __dInvPI(%rax), %ymm4
vmovupd __dRShifter(%rax), %ymm5
/*
ARGUMENT RANGE REDUCTION:
Add Pi/2 to argument: X' = X+Pi/2
*/
vaddpd __dHalfPI(%rax), %ymm1, %ymm7
/* Get absolute argument value: X' = |X'| */
vandpd __dAbsMask(%rax), %ymm7, %ymm2
/* Y = X'*InvPi + RS : right shifter add */
vfmadd213pd %ymm5, %ymm4, %ymm7
vmovupd __dC7(%rax), %ymm4
/* Check for large arguments path */
vcmpnle_uqpd __dRangeVal(%rax), %ymm2, %ymm3
/* N = Y - RS : right shifter sub */
vsubpd %ymm5, %ymm7, %ymm6
vmovupd __dPI1_FMA(%rax), %ymm2
/* SignRes = Y<<63 : shift LSB to MSB place for result sign */
vpsllq $63, %ymm7, %ymm7
/* N = N - 0.5 */
vsubpd __dOneHalf(%rax), %ymm6, %ymm0
vmovmskpd %ymm3, %ecx
/* R = X - N*Pi1 */
vmovapd %ymm1, %ymm3
vfnmadd231pd %ymm0, %ymm2, %ymm3
/* R = R - N*Pi2 */
vfnmadd231pd __dPI2_FMA(%rax), %ymm0, %ymm3
/* R = R - N*Pi3 */
vfnmadd132pd __dPI3_FMA(%rax), %ymm3, %ymm0
/* POLYNOMIAL APPROXIMATION: R2 = R*R */
vmulpd %ymm0, %ymm0, %ymm5
vfmadd213pd __dC6(%rax), %ymm5, %ymm4
vfmadd213pd __dC5(%rax), %ymm5, %ymm4
vfmadd213pd __dC4(%rax), %ymm5, %ymm4
/* Poly = C3+R2*(C4+R2*(C5+R2*(C6+R2*C7))) */
vfmadd213pd __dC3(%rax), %ymm5, %ymm4
/* Poly = R+R*(R2*(C1+R2*(C2+R2*Poly))) */
vfmadd213pd __dC2(%rax), %ymm5, %ymm4
vfmadd213pd __dC1(%rax), %ymm5, %ymm4
vmulpd %ymm5, %ymm4, %ymm6
vfmadd213pd %ymm0, %ymm0, %ymm6
/*
RECONSTRUCTION:
Final sign setting: Res = Poly^SignRes */
vxorpd %ymm7, %ymm6, %ymm0
testl %ecx, %ecx
jne .LBL_1_3
.LBL_1_2:
cfi_remember_state
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
vmovupd %ymm1, 320(%rsp)
vmovupd %ymm0, 384(%rsp)
je .LBL_1_2
xorb %dl, %dl
xorl %eax, %eax
vmovups %ymm8, 224(%rsp)
vmovups %ymm9, 192(%rsp)
vmovups %ymm10, 160(%rsp)
vmovups %ymm11, 128(%rsp)
vmovups %ymm12, 96(%rsp)
vmovups %ymm13, 64(%rsp)
vmovups %ymm14, 32(%rsp)
vmovups %ymm15, (%rsp)
movq %rsi, 264(%rsp)
movq %rdi, 256(%rsp)
movq %r12, 296(%rsp)
cfi_offset_rel_rsp (12, 296)
movb %dl, %r12b
movq %r13, 288(%rsp)
cfi_offset_rel_rsp (13, 288)
movl %ecx, %r13d
movq %r14, 280(%rsp)
cfi_offset_rel_rsp (14, 280)
movl %eax, %r14d
movq %r15, 272(%rsp)
cfi_offset_rel_rsp (15, 272)
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:
incb %r12b
addl $2, %r14d
cmpb $16, %r12b
jb .LBL_1_6
vmovups 224(%rsp), %ymm8
vmovups 192(%rsp), %ymm9
vmovups 160(%rsp), %ymm10
vmovups 128(%rsp), %ymm11
vmovups 96(%rsp), %ymm12
vmovups 64(%rsp), %ymm13
vmovups 32(%rsp), %ymm14
vmovups (%rsp), %ymm15
vmovupd 384(%rsp), %ymm0
movq 264(%rsp), %rsi
movq 256(%rsp), %rdi
movq 296(%rsp), %r12
cfi_restore (%r12)
movq 288(%rsp), %r13
cfi_restore (%r13)
movq 280(%rsp), %r14
cfi_restore (%r14)
movq 272(%rsp), %r15
cfi_restore (%r15)
jmp .LBL_1_2
.LBL_1_10:
cfi_restore_state
movzbl %r12b, %r15d
shlq $4, %r15
vmovsd 328(%rsp,%r15), %xmm0
vzeroupper
call JUMPTARGET(cos)
vmovsd %xmm0, 392(%rsp,%r15)
jmp .LBL_1_8
.LBL_1_12:
movzbl %r12b, %r15d
shlq $4, %r15
vmovsd 320(%rsp,%r15), %xmm0
vzeroupper
call JUMPTARGET(cos)
vmovsd %xmm0, 384(%rsp,%r15)
jmp .LBL_1_7
END (_ZGVdN4v_cos_avx2)
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