diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core_avx2.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core_avx2.S | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core_avx2.S b/sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core_avx2.S new file mode 100644 index 0000000000..6c25e145d6 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/svml_s_cosf8_core_avx2.S @@ -0,0 +1,215 @@ +/* Function cosf vectorized with AVX2. + Copyright (C) 2014-2015 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_cosf_data.h" + + .text +ENTRY (_ZGVdN8v_cosf_avx2) +/* + ALGORITHM DESCRIPTION: + + 1) Range reduction to [-Pi/2; +Pi/2] interval + a) We remove sign using AND operation + b) Add Pi/2 value to argument X for Cos to Sin transformation + c) Getting octant Y by 1/Pi multiplication + d) Add "Right Shifter" value + e) Treat obtained value as integer for destination sign setting. + Shift first bit of this value to the last (sign) position + f) Subtract "Right Shifter" value + g) Subtract 0.5 from result for octant correction + h) Subtract Y*PI from X argument, where PI divided to 4 parts: + X = X - Y*PI1 - Y*PI2 - Y*PI3 - Y*PI4; + 2) Polynomial (minimax for sin within [-Pi/2; +Pi/2] interval) + a) Calculate X^2 = X * X + b) Calculate polynomial: + R = X + X * X^2 * (A3 + x^2 * (A5 + ..... + 3) Destination sign setting + a) Set shifted destination sign using XOR operation: + R = XOR( R, S ); + */ + 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_scos_data@GOTPCREL(%rip), %rax + vmovaps %ymm0, %ymm2 + vmovups __sRShifter(%rax), %ymm5 + vmovups __sPI1_FMA(%rax), %ymm7 + +/* b) Add Pi/2 value to argument X for Cos to Sin transformation */ + vaddps __sHalfPI(%rax), %ymm2, %ymm4 + +/* + 1) Range reduction to [-Pi/2; +Pi/2] interval + c) Getting octant Y by 1/Pi multiplication + d) Add "Right Shifter" (0x4B000000) value + */ + vfmadd132ps __sInvPI(%rax), %ymm5, %ymm4 + +/* f) Subtract "Right Shifter" (0x4B000000) value */ + vsubps %ymm5, %ymm4, %ymm6 + +/* + e) Treat obtained value as integer for destination sign setting. + Shift first bit of this value to the last (sign) position (S << 31) + */ + vpslld $31, %ymm4, %ymm0 + +/* g) Subtract 0.5 from result for octant correction */ + vsubps __sOneHalf(%rax), %ymm6, %ymm4 + +/* Check for large and special arguments */ + vandps __sAbsMask(%rax), %ymm2, %ymm3 + vcmpnle_uqps __sRangeReductionVal(%rax), %ymm3, %ymm1 + +/* + h) Subtract Y*PI from X argument, where PI divided to 4 parts: + X = X - Y*PI1 - Y*PI2 - Y*PI3 + */ + vmovaps %ymm2, %ymm3 + vfnmadd231ps %ymm4, %ymm7, %ymm3 + vfnmadd231ps __sPI2_FMA(%rax), %ymm4, %ymm3 + vfnmadd132ps __sPI3_FMA(%rax), %ymm3, %ymm4 + +/* a) Calculate X^2 = X * X */ + vmulps %ymm4, %ymm4, %ymm5 + +/* + 3) Destination sign setting + a) Set shifted destination sign using XOR operation: + R = XOR( R, S ); + */ + vxorps %ymm0, %ymm4, %ymm6 + vmovups __sA9_FMA(%rax), %ymm0 + +/* + b) Calculate polynomial: + R = X + X * X^2 * (A3 + x^2 * (A5 + x^2 * (A7 + x^2 * (A9)))) + */ + vfmadd213ps __sA7_FMA(%rax), %ymm5, %ymm0 + vfmadd213ps __sA5_FMA(%rax), %ymm5, %ymm0 + vfmadd213ps __sA3(%rax), %ymm5, %ymm0 + vmulps %ymm5, %ymm0, %ymm0 + vmovmskps %ymm1, %ecx + vfmadd213ps %ymm6, %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 + vmovups %ymm2, 320(%rsp) + vmovups %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 + vmovups 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 + vmovss 324(%rsp,%r15,8), %xmm0 + vzeroupper + + call cosf@PLT + + vmovss %xmm0, 388(%rsp,%r15,8) + jmp .LBL_1_8 + +.LBL_1_12: + movzbl %r12b, %r15d + vmovss 320(%rsp,%r15,8), %xmm0 + vzeroupper + + call cosf@PLT + + vmovss %xmm0, 384(%rsp,%r15,8) + jmp .LBL_1_7 + +END (_ZGVdN8v_cosf_avx2) |