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/* Function atan vectorized with AVX2.
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:
*
* For 0.0 <= x <= 7.0/16.0: atan(x) = atan(0.0) + atan(s), where s=(x-0.0)/(1.0+0.0*x)
* For 7.0/16.0 <= x <= 11.0/16.0: atan(x) = atan(0.5) + atan(s), where s=(x-0.5)/(1.0+0.5*x)
* For 11.0/16.0 <= x <= 19.0/16.0: atan(x) = atan(1.0) + atan(s), where s=(x-1.0)/(1.0+1.0*x)
* For 19.0/16.0 <= x <= 39.0/16.0: atan(x) = atan(1.5) + atan(s), where s=(x-1.5)/(1.0+1.5*x)
* For 39.0/16.0 <= x <= inf : atan(x) = atan(inf) + atan(s), where s=-1.0/x
* Where atan(s) ~= s+s^3*Poly11(s^2) on interval |s|<7.0/0.16.
*
*/
/* Offsets for data table __svml_datan_data_internal_avx512
*/
#define AbsMask 0
#define Shifter 32
#define MaxThreshold 64
#define MOne 96
#define One 128
#define LargeX 160
#define Zero 192
#define Tbl_H 224
#define Tbl_L 480
#define dIndexMed 736
#define Pi2 768
#define Pi2_low 800
#define coeff 832
#include <sysdep.h>
.section .text.avx2, "ax", @progbits
ENTRY(_ZGVdN4v_atan_avx2)
lea Tbl_H+128+__svml_datan_data_internal_avx512(%rip), %rdi
vmovupd Shifter+__svml_datan_data_internal_avx512(%rip), %ymm4
vmovupd One+__svml_datan_data_internal_avx512(%rip), %ymm9
/* saturate X range */
vmovupd LargeX+__svml_datan_data_internal_avx512(%rip), %ymm6
vandpd __svml_datan_data_internal_avx512(%rip), %ymm0, %ymm7
vaddpd %ymm4, %ymm7, %ymm2
vcmpge_oqpd MaxThreshold+__svml_datan_data_internal_avx512(%rip), %ymm7, %ymm3
vminpd %ymm7, %ymm6, %ymm10
vsubpd %ymm4, %ymm2, %ymm5
/*
* table lookup sequence
* VPERMUTE not available
*/
vpsllq $3, %ymm2, %ymm13
vsubpd %ymm5, %ymm7, %ymm8
vcmpge_oqpd dIndexMed+__svml_datan_data_internal_avx512(%rip), %ymm2, %ymm2
vfmadd231pd %ymm7, %ymm5, %ymm9
vpand .FLT_11(%rip), %ymm13, %ymm14
vblendvpd %ymm3, MOne+__svml_datan_data_internal_avx512(%rip), %ymm8, %ymm11
vblendvpd %ymm3, %ymm10, %ymm9, %ymm12
vxorpd %ymm0, %ymm7, %ymm1
/* R+Rl = DiffX/Y */
vdivpd %ymm12, %ymm11, %ymm0
vextractf128 $1, %ymm14, %xmm4
vmovd %xmm14, %eax
vmovd %xmm4, %ecx
movslq %eax, %rax
vpextrd $2, %xmm14, %edx
movslq %ecx, %rcx
vpextrd $2, %xmm4, %esi
movslq %edx, %rdx
movslq %esi, %rsi
vmovsd -128(%rax, %rdi), %xmm15
vmovsd (%rdi, %rax), %xmm7
vmovsd -128(%rcx, %rdi), %xmm5
vmovsd (%rdi, %rcx), %xmm9
vmovhpd -128(%rdx, %rdi), %xmm15, %xmm15
vmovhpd (%rdi, %rdx), %xmm7, %xmm8
vmovhpd -128(%rsi, %rdi), %xmm5, %xmm6
vmovhpd (%rdi, %rsi), %xmm9, %xmm10
/* polynomial evaluation */
vmulpd %ymm0, %ymm0, %ymm5
vmulpd %ymm5, %ymm5, %ymm4
vinsertf128 $1, %xmm6, %ymm15, %ymm11
vinsertf128 $1, %xmm10, %ymm8, %ymm12
vblendvpd %ymm2, %ymm12, %ymm11, %ymm13
vmovupd coeff+__svml_datan_data_internal_avx512(%rip), %ymm8
vmovupd coeff+64+__svml_datan_data_internal_avx512(%rip), %ymm2
vmulpd %ymm5, %ymm0, %ymm6
vfmadd213pd coeff+32+__svml_datan_data_internal_avx512(%rip), %ymm5, %ymm8
vfmadd213pd coeff+96+__svml_datan_data_internal_avx512(%rip), %ymm5, %ymm2
/* set table value to Pi/2 for large X */
vblendvpd %ymm3, Pi2+__svml_datan_data_internal_avx512(%rip), %ymm13, %ymm7
vmovupd coeff+128+__svml_datan_data_internal_avx512(%rip), %ymm3
vfmadd213pd %ymm2, %ymm4, %ymm8
vfmadd213pd coeff+160+__svml_datan_data_internal_avx512(%rip), %ymm3, %ymm5
vfmadd213pd %ymm5, %ymm4, %ymm8
vfmadd213pd %ymm0, %ymm6, %ymm8
vaddpd %ymm8, %ymm7, %ymm0
vxorpd %ymm1, %ymm0, %ymm0
ret
END(_ZGVdN4v_atan_avx2)
.section .rodata, "a"
.align 32
.FLT_11:
.long 0x00000078, 0x00000000, 0x00000078, 0x00000000, 0x00000078, 0x00000000, 0x00000078, 0x00000000
.type .FLT_11, @object
.size .FLT_11, 32
.align 32
#ifdef __svml_datan_data_internal_avx512_typedef
typedef unsigned int VUINT32;
typedef struct {
__declspec(align(32)) VUINT32 AbsMask[4][2];
__declspec(align(32)) VUINT32 Shifter[4][2];
__declspec(align(32)) VUINT32 MaxThreshold[4][2];
__declspec(align(32)) VUINT32 MOne[4][2];
__declspec(align(32)) VUINT32 One[4][2];
__declspec(align(32)) VUINT32 LargeX[4][2];
__declspec(align(32)) VUINT32 Zero[4][2];
__declspec(align(32)) VUINT32 Tbl_H[32][2];
__declspec(align(32)) VUINT32 Tbl_L[32][2];
__declspec(align(32)) VUINT32 dIndexMed[4][2];
__declspec(align(32)) VUINT32 Pi2[4][2];
__declspec(align(32)) VUINT32 Pi2_low[4][2];
__declspec(align(32)) VUINT32 coeff[6][4][2];
} __svml_datan_data_internal_avx512;
#endif
__svml_datan_data_internal_avx512:
/* AbsMask */
.quad 0x7fffffffffffffff, 0x7fffffffffffffff, 0x7fffffffffffffff, 0x7fffffffffffffff
/* Shifter */
.align 32
.quad 0x4318000000000000, 0x4318000000000000, 0x4318000000000000, 0x4318000000000000
/* MaxThreshold */
.align 32
.quad 0x401f800000000000, 0x401f800000000000, 0x401f800000000000, 0x401f800000000000
/* MOne */
.align 32
.quad 0xbff0000000000000, 0xbff0000000000000, 0xbff0000000000000, 0xbff0000000000000
/* One */
.align 32
.quad 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000
/* LargeX */
.align 32
.quad 0x47f0000000000000, 0x47f0000000000000, 0x47f0000000000000, 0x47f0000000000000
/* Zero */
.align 32
.quad 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000
/* Tbl_H */
.align 32
.quad 0x0000000000000000, 0x3fcf5b75f92c80dd
.quad 0x3fddac670561bb4f, 0x3fe4978fa3269ee1
.quad 0x3fe921fb54442d18, 0x3fecac7c57846f9e
.quad 0x3fef730bd281f69b, 0x3ff0d38f2c5ba09f
.quad 0x3ff1b6e192ebbe44, 0x3ff270ef55a53a25
.quad 0x3ff30b6d796a4da8, 0x3ff38d6a6ce13353
.quad 0x3ff3fc176b7a8560, 0x3ff45b54837351a0
.quad 0x3ff4ae10fc6589a5, 0x3ff4f68dea672617
.quad 0x3ff5368c951e9cfd, 0x3ff56f6f33a3e6a7
.quad 0x3ff5a25052114e60, 0x3ff5d013c41adabd
.quad 0x3ff5f97315254857, 0x3ff61f06c6a92b89
.quad 0x3ff6414d44094c7c, 0x3ff660b02c736a06
.quad 0x3ff67d8863bc99bd, 0x3ff698213a9d5053
.quad 0x3ff6b0bae830c070, 0x3ff6c78c7edeb195
.quad 0x3ff6dcc57bb565fd, 0x3ff6f08f07435fec
.quad 0x3ff7030cf9403197, 0x3ff7145eac2088a4
/* Tbl_L */
.align 32
.quad 0x0000000000000000, 0x3c68ab6e3cf7afbd
.quad 0x3c7a2b7f222f65e2, 0x3c72419a87f2a458
.quad 0x3c81a62633145c07, 0x3c80dae13ad18a6b
.quad 0x3c7007887af0cbbd, 0xbc9bd0dc231bfd70
.quad 0x3c9b1b466a88828e, 0xbc9a66b1af5f84fb
.quad 0x3c96254cb03bb199, 0xbc812c77e8a80f5c
.quad 0xbc4441a3bd3f1084, 0x3c79e4a72eedacc4
.quad 0xbc93b03e8a27f555, 0x3c9934f9f2b0020e
.quad 0xbc996f47948a99f1, 0xbc7df6edd6f1ec3b
.quad 0x3c78c2d0c89de218, 0x3c9f82bba194dd5d
.quad 0xbc831151a43b51ca, 0xbc8487d50bceb1a5
.quad 0xbc9c5f60a65c7397, 0xbc7acb6afb332a0f
.quad 0xbc99b7bd2e1e8c9c, 0xbc9b9839085189e3
.quad 0xbc97d1ab82ffb70b, 0x3c99239ad620ffe2
.quad 0xbc929c86447928e7, 0xbc8957a7170df016
.quad 0xbc7cbe1896221608, 0xbc9fda5797b32a0b
/* dIndexMed */
.align 32
.quad 0x4318000000000010, 0x4318000000000010, 0x4318000000000010, 0x4318000000000010
/* Pi2 */
.align 32
.quad 0x3ff921fb54442d18, 0x3ff921fb54442d18, 0x3ff921fb54442d18, 0x3ff921fb54442d18
/* Pi2_low */
.align 32
.quad 0x3c91a62633145c07, 0x3c91a62633145c07, 0x3c91a62633145c07, 0x3c91a62633145c07
/* coeff6 */
.align 32
.quad 0x3fb2e9b9f5c4fe97, 0x3fb2e9b9f5c4fe97, 0x3fb2e9b9f5c4fe97, 0x3fb2e9b9f5c4fe97
.quad 0xbfb74257c46790cc, 0xbfb74257c46790cc, 0xbfb74257c46790cc, 0xbfb74257c46790cc
.quad 0x3fbc71bfeff916a0, 0x3fbc71bfeff916a0, 0x3fbc71bfeff916a0, 0x3fbc71bfeff916a0
.quad 0xbfc249248eef04da, 0xbfc249248eef04da, 0xbfc249248eef04da, 0xbfc249248eef04da
.quad 0x3fc999999998741e, 0x3fc999999998741e, 0x3fc999999998741e, 0x3fc999999998741e
.quad 0xbfd555555555554d, 0xbfd555555555554d, 0xbfd555555555554d, 0xbfd555555555554d
.align 32
.type __svml_datan_data_internal_avx512, @object
.size __svml_datan_data_internal_avx512, .-__svml_datan_data_internal_avx512
|
