| /* 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) |
