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2a8c2c7b | 1 | /* Function sinf vectorized with AVX2. |
688903eb | 2 | Copyright (C) 2014-2018 Free Software Foundation, Inc. |
2a8c2c7b AS |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <sysdep.h> | |
36870482 | 20 | #include "svml_s_trig_data.h" |
2a8c2c7b AS |
21 | |
22 | .text | |
23 | ENTRY(_ZGVdN8v_sinf_avx2) | |
24 | /* | |
25 | ALGORITHM DESCRIPTION: | |
26 | ||
27 | 1) Range reduction to [-Pi/2; +Pi/2] interval | |
28 | a) Grab sign from source argument and save it. | |
29 | b) Remove sign using AND operation | |
30 | c) Getting octant Y by 1/Pi multiplication | |
31 | d) Add "Right Shifter" value | |
32 | e) Treat obtained value as integer for destination sign setting. | |
33 | Shift first bit of this value to the last (sign) position | |
34 | f) Change destination sign if source sign is negative | |
35 | using XOR operation. | |
36 | g) Subtract "Right Shifter" value | |
37 | h) Subtract Y*PI from X argument, where PI divided to 4 parts: | |
38 | X = X - Y*PI1 - Y*PI2 - Y*PI3 - Y*PI4; | |
39 | 2) Polynomial (minimax for sin within [-Pi/2; +Pi/2] interval) | |
40 | a) Calculate X^2 = X * X | |
41 | b) Calculate polynomial: | |
42 | R = X + X * X^2 * (A3 + x^2 * (A5 + ...... | |
43 | 3) Destination sign setting | |
44 | a) Set shifted destination sign using XOR operation: | |
45 | R = XOR( R, S ); | |
46 | */ | |
47 | pushq %rbp | |
48 | cfi_adjust_cfa_offset (8) | |
49 | cfi_rel_offset (%rbp, 0) | |
50 | movq %rsp, %rbp | |
51 | cfi_def_cfa_register (%rbp) | |
52 | andq $-64, %rsp | |
53 | subq $448, %rsp | |
36870482 | 54 | movq __svml_s_trig_data@GOTPCREL(%rip), %rax |
2a8c2c7b AS |
55 | vmovdqa %ymm0, %ymm5 |
56 | vmovups __sAbsMask(%rax), %ymm3 | |
57 | vmovups __sInvPI(%rax), %ymm7 | |
58 | vmovups __sRShifter(%rax), %ymm0 | |
59 | vmovups __sPI1_FMA(%rax), %ymm1 | |
60 | ||
61 | /* b) Remove sign using AND operation */ | |
62 | vandps %ymm3, %ymm5, %ymm4 | |
63 | ||
64 | /* | |
65 | c) Getting octant Y by 1/Pi multiplication | |
66 | d) Add "Right Shifter" value | |
67 | */ | |
68 | vfmadd213ps %ymm0, %ymm4, %ymm7 | |
69 | ||
70 | /* g) Subtract "Right Shifter" value */ | |
71 | vsubps %ymm0, %ymm7, %ymm2 | |
72 | ||
73 | /* | |
74 | e) Treat obtained value as integer for destination sign setting. | |
75 | Shift first bit of this value to the last (sign) position | |
76 | */ | |
77 | vpslld $31, %ymm7, %ymm6 | |
78 | ||
79 | /* | |
80 | h) Subtract Y*PI from X argument, where PI divided to 4 parts: | |
81 | X = X - Y*PI1 - Y*PI2 - Y*PI3; | |
82 | */ | |
83 | vmovdqa %ymm4, %ymm0 | |
84 | vfnmadd231ps %ymm2, %ymm1, %ymm0 | |
85 | ||
86 | /* Check for large and special values */ | |
87 | vcmpnle_uqps __sRangeReductionVal(%rax), %ymm4, %ymm4 | |
88 | vfnmadd231ps __sPI2_FMA(%rax), %ymm2, %ymm0 | |
89 | vfnmadd132ps __sPI3_FMA(%rax), %ymm0, %ymm2 | |
90 | ||
91 | /* | |
92 | 2) Polynomial (minimax for sin within [-Pi/2; +Pi/2] interval) | |
93 | a) Calculate X^2 = X * X | |
94 | b) Calculate polynomial: | |
95 | R = X + X * X^2 * (A3 + x^2 * (A5 + ...... | |
96 | */ | |
97 | vmulps %ymm2, %ymm2, %ymm1 | |
98 | ||
99 | /* | |
100 | f) Change destination sign if source sign is negative | |
101 | using XOR operation. | |
102 | */ | |
103 | vandnps %ymm5, %ymm3, %ymm0 | |
104 | vxorps %ymm6, %ymm2, %ymm3 | |
105 | vmovups __sA9(%rax), %ymm2 | |
106 | vfmadd213ps __sA7(%rax), %ymm1, %ymm2 | |
107 | vfmadd213ps __sA5(%rax), %ymm1, %ymm2 | |
108 | vfmadd213ps __sA3(%rax), %ymm1, %ymm2 | |
109 | vmulps %ymm1, %ymm2, %ymm6 | |
110 | vfmadd213ps %ymm3, %ymm3, %ymm6 | |
111 | vmovmskps %ymm4, %ecx | |
112 | ||
113 | /* | |
114 | 3) Destination sign setting | |
115 | a) Set shifted destination sign using XOR operation: | |
116 | R = XOR( R, S ); | |
117 | */ | |
118 | vxorps %ymm0, %ymm6, %ymm0 | |
119 | testl %ecx, %ecx | |
120 | jne .LBL_1_3 | |
121 | ||
122 | .LBL_1_2: | |
123 | cfi_remember_state | |
124 | movq %rbp, %rsp | |
125 | cfi_def_cfa_register (%rsp) | |
126 | popq %rbp | |
127 | cfi_adjust_cfa_offset (-8) | |
128 | cfi_restore (%rbp) | |
129 | ret | |
130 | ||
131 | .LBL_1_3: | |
132 | cfi_restore_state | |
133 | vmovups %ymm5, 320(%rsp) | |
134 | vmovups %ymm0, 384(%rsp) | |
135 | je .LBL_1_2 | |
136 | ||
137 | xorb %dl, %dl | |
138 | xorl %eax, %eax | |
139 | vmovups %ymm8, 224(%rsp) | |
140 | vmovups %ymm9, 192(%rsp) | |
141 | vmovups %ymm10, 160(%rsp) | |
142 | vmovups %ymm11, 128(%rsp) | |
143 | vmovups %ymm12, 96(%rsp) | |
144 | vmovups %ymm13, 64(%rsp) | |
145 | vmovups %ymm14, 32(%rsp) | |
146 | vmovups %ymm15, (%rsp) | |
147 | movq %rsi, 264(%rsp) | |
148 | movq %rdi, 256(%rsp) | |
149 | movq %r12, 296(%rsp) | |
150 | cfi_offset_rel_rsp (12, 296) | |
151 | movb %dl, %r12b | |
152 | movq %r13, 288(%rsp) | |
153 | cfi_offset_rel_rsp (13, 288) | |
154 | movl %ecx, %r13d | |
155 | movq %r14, 280(%rsp) | |
156 | cfi_offset_rel_rsp (14, 280) | |
157 | movl %eax, %r14d | |
158 | movq %r15, 272(%rsp) | |
159 | cfi_offset_rel_rsp (15, 272) | |
160 | cfi_remember_state | |
161 | ||
162 | .LBL_1_6: | |
163 | btl %r14d, %r13d | |
164 | jc .LBL_1_12 | |
165 | ||
166 | .LBL_1_7: | |
167 | lea 1(%r14), %esi | |
168 | btl %esi, %r13d | |
169 | jc .LBL_1_10 | |
170 | ||
171 | .LBL_1_8: | |
172 | incb %r12b | |
173 | addl $2, %r14d | |
174 | cmpb $16, %r12b | |
175 | jb .LBL_1_6 | |
176 | ||
177 | vmovups 224(%rsp), %ymm8 | |
178 | vmovups 192(%rsp), %ymm9 | |
179 | vmovups 160(%rsp), %ymm10 | |
180 | vmovups 128(%rsp), %ymm11 | |
181 | vmovups 96(%rsp), %ymm12 | |
182 | vmovups 64(%rsp), %ymm13 | |
183 | vmovups 32(%rsp), %ymm14 | |
184 | vmovups (%rsp), %ymm15 | |
185 | vmovups 384(%rsp), %ymm0 | |
186 | movq 264(%rsp), %rsi | |
187 | movq 256(%rsp), %rdi | |
188 | movq 296(%rsp), %r12 | |
189 | cfi_restore (%r12) | |
190 | movq 288(%rsp), %r13 | |
191 | cfi_restore (%r13) | |
192 | movq 280(%rsp), %r14 | |
193 | cfi_restore (%r14) | |
194 | movq 272(%rsp), %r15 | |
195 | cfi_restore (%r15) | |
196 | jmp .LBL_1_2 | |
197 | ||
198 | .LBL_1_10: | |
199 | cfi_restore_state | |
200 | movzbl %r12b, %r15d | |
201 | vmovss 324(%rsp,%r15,8), %xmm0 | |
202 | vzeroupper | |
203 | ||
86ed8882 | 204 | call JUMPTARGET(sinf) |
2a8c2c7b AS |
205 | |
206 | vmovss %xmm0, 388(%rsp,%r15,8) | |
207 | jmp .LBL_1_8 | |
208 | ||
209 | .LBL_1_12: | |
210 | movzbl %r12b, %r15d | |
211 | vmovss 320(%rsp,%r15,8), %xmm0 | |
212 | vzeroupper | |
213 | ||
86ed8882 | 214 | call JUMPTARGET(sinf) |
2a8c2c7b AS |
215 | |
216 | vmovss %xmm0, 384(%rsp,%r15,8) | |
217 | jmp .LBL_1_7 | |
218 | ||
219 | END(_ZGVdN8v_sinf_avx2) |