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8f856602 | 1 | /* Function log10f vectorized with AVX-512. |
6d7e8eda | 2 | Copyright (C) 2021-2023 Free Software Foundation, Inc. |
8f856602 SP |
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 | https://www.gnu.org/licenses/. */ | |
18 | ||
19 | /* | |
20 | * ALGORITHM DESCRIPTION: | |
21 | * | |
22 | * Get short reciprocal approximation Rcp ~ 1/mantissa(x) | |
23 | * R = Rcp*x - 1.0 | |
24 | * log10(x) = k*log10(2.0) - log10(Rcp) + poly_approximation(R) | |
25 | * log10(Rcp) is tabulated | |
26 | * | |
27 | * | |
28 | */ | |
29 | ||
30 | /* Offsets for data table __svml_slog10_data_internal_avx512 | |
31 | */ | |
602e584f SP |
32 | #define One 0 |
33 | #define coeff4 64 | |
34 | #define coeff3 128 | |
35 | #define coeff2 192 | |
36 | #define coeff1 256 | |
37 | #define L2 320 | |
8f856602 SP |
38 | |
39 | #include <sysdep.h> | |
40 | ||
95177b78 | 41 | .section .text.evex512, "ax", @progbits |
8f856602 | 42 | ENTRY(_ZGVeN16v_log10f_skx) |
602e584f SP |
43 | pushq %rbp |
44 | cfi_def_cfa_offset(16) | |
45 | movq %rsp, %rbp | |
46 | cfi_def_cfa(6, 16) | |
47 | cfi_offset(6, -16) | |
48 | andq $-64, %rsp | |
49 | subq $192, %rsp | |
50 | vgetmantps $11, {sae}, %zmm0, %zmm3 | |
51 | vmovups __svml_slog10_data_internal_avx512(%rip), %zmm1 | |
52 | vgetexpps {sae}, %zmm0, %zmm5 | |
53 | vmovups L2+__svml_slog10_data_internal_avx512(%rip), %zmm10 | |
54 | vpsrld $19, %zmm3, %zmm7 | |
55 | vgetexpps {sae}, %zmm3, %zmm6 | |
56 | vsubps {rn-sae}, %zmm1, %zmm3, %zmm11 | |
57 | vpermps coeff4+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm1 | |
58 | vpermps coeff3+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm2 | |
59 | vsubps {rn-sae}, %zmm6, %zmm5, %zmm9 | |
60 | vpermps coeff2+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm4 | |
61 | vpermps coeff1+__svml_slog10_data_internal_avx512(%rip), %zmm7, %zmm8 | |
62 | ||
63 | /* x<=0? */ | |
64 | vfpclassps $94, %zmm0, %k0 | |
65 | vfmadd213ps {rn-sae}, %zmm2, %zmm11, %zmm1 | |
66 | vmulps {rn-sae}, %zmm10, %zmm9, %zmm12 | |
67 | vfmadd213ps {rn-sae}, %zmm4, %zmm11, %zmm1 | |
68 | kmovw %k0, %edx | |
69 | vfmadd213ps {rn-sae}, %zmm8, %zmm11, %zmm1 | |
70 | vfmadd213ps {rn-sae}, %zmm12, %zmm11, %zmm1 | |
71 | testl %edx, %edx | |
72 | ||
73 | /* Go to special inputs processing branch */ | |
74 | jne L(SPECIAL_VALUES_BRANCH) | |
75 | # LOE rbx r12 r13 r14 r15 edx zmm0 zmm1 | |
76 | ||
77 | /* Restore registers | |
78 | * and exit the function | |
79 | */ | |
8f856602 SP |
80 | |
81 | L(EXIT): | |
602e584f SP |
82 | vmovaps %zmm1, %zmm0 |
83 | movq %rbp, %rsp | |
84 | popq %rbp | |
85 | cfi_def_cfa(7, 8) | |
86 | cfi_restore(6) | |
87 | ret | |
88 | cfi_def_cfa(6, 16) | |
89 | cfi_offset(6, -16) | |
90 | ||
91 | /* Branch to process | |
92 | * special inputs | |
93 | */ | |
8f856602 SP |
94 | |
95 | L(SPECIAL_VALUES_BRANCH): | |
602e584f SP |
96 | vmovups %zmm0, 64(%rsp) |
97 | vmovups %zmm1, 128(%rsp) | |
98 | # LOE rbx r12 r13 r14 r15 edx zmm1 | |
99 | ||
100 | xorl %eax, %eax | |
101 | # LOE rbx r12 r13 r14 r15 eax edx | |
102 | ||
103 | vzeroupper | |
104 | movq %r12, 16(%rsp) | |
105 | /* DW_CFA_expression: r12 (r12) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -176; DW_OP_plus) */ | |
106 | .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 0xff, 0xff, 0xff, 0x22 | |
107 | movl %eax, %r12d | |
108 | movq %r13, 8(%rsp) | |
109 | /* DW_CFA_expression: r13 (r13) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -184; DW_OP_plus) */ | |
110 | .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 0xff, 0xff, 0xff, 0x22 | |
111 | movl %edx, %r13d | |
112 | movq %r14, (%rsp) | |
113 | /* DW_CFA_expression: r14 (r14) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -192; DW_OP_plus) */ | |
114 | .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22 | |
115 | # LOE rbx r15 r12d r13d | |
116 | ||
117 | /* Range mask | |
118 | * bits check | |
119 | */ | |
8f856602 SP |
120 | |
121 | L(RANGEMASK_CHECK): | |
602e584f | 122 | btl %r12d, %r13d |
8f856602 | 123 | |
602e584f SP |
124 | /* Call scalar math function */ |
125 | jc L(SCALAR_MATH_CALL) | |
126 | # LOE rbx r15 r12d r13d | |
8f856602 | 127 | |
602e584f SP |
128 | /* Special inputs |
129 | * processing loop | |
130 | */ | |
8f856602 SP |
131 | |
132 | L(SPECIAL_VALUES_LOOP): | |
602e584f SP |
133 | incl %r12d |
134 | cmpl $16, %r12d | |
135 | ||
136 | /* Check bits in range mask */ | |
137 | jl L(RANGEMASK_CHECK) | |
138 | # LOE rbx r15 r12d r13d | |
139 | ||
140 | movq 16(%rsp), %r12 | |
141 | cfi_restore(12) | |
142 | movq 8(%rsp), %r13 | |
143 | cfi_restore(13) | |
144 | movq (%rsp), %r14 | |
145 | cfi_restore(14) | |
146 | vmovups 128(%rsp), %zmm1 | |
147 | ||
148 | /* Go to exit */ | |
149 | jmp L(EXIT) | |
150 | /* DW_CFA_expression: r12 (r12) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -176; DW_OP_plus) */ | |
151 | .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 0xff, 0xff, 0xff, 0x22 | |
152 | /* DW_CFA_expression: r13 (r13) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -184; DW_OP_plus) */ | |
153 | .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 0xff, 0xff, 0xff, 0x22 | |
154 | /* DW_CFA_expression: r14 (r14) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -192; DW_OP_plus) */ | |
155 | .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22 | |
156 | # LOE rbx r12 r13 r14 r15 zmm1 | |
157 | ||
158 | /* Scalar math fucntion call | |
159 | * to process special input | |
160 | */ | |
8f856602 SP |
161 | |
162 | L(SCALAR_MATH_CALL): | |
602e584f | 163 | movl %r12d, %r14d |
3079f652 | 164 | vmovss 64(%rsp, %r14, 4), %xmm0 |
602e584f SP |
165 | call log10f@PLT |
166 | # LOE rbx r14 r15 r12d r13d xmm0 | |
8f856602 | 167 | |
3079f652 | 168 | vmovss %xmm0, 128(%rsp, %r14, 4) |
8f856602 | 169 | |
602e584f SP |
170 | /* Process special inputs in loop */ |
171 | jmp L(SPECIAL_VALUES_LOOP) | |
172 | # LOE rbx r15 r12d r13d | |
8f856602 SP |
173 | END(_ZGVeN16v_log10f_skx) |
174 | ||
602e584f SP |
175 | .section .rodata, "a" |
176 | .align 64 | |
8f856602 SP |
177 | |
178 | #ifdef __svml_slog10_data_internal_avx512_typedef | |
179 | typedef unsigned int VUINT32; | |
180 | typedef struct { | |
602e584f SP |
181 | __declspec(align(64)) VUINT32 One[16][1]; |
182 | __declspec(align(64)) VUINT32 coeff4[16][1]; | |
183 | __declspec(align(64)) VUINT32 coeff3[16][1]; | |
184 | __declspec(align(64)) VUINT32 coeff2[16][1]; | |
185 | __declspec(align(64)) VUINT32 coeff1[16][1]; | |
186 | __declspec(align(64)) VUINT32 L2[16][1]; | |
187 | } __svml_slog10_data_internal_avx512; | |
8f856602 SP |
188 | #endif |
189 | __svml_slog10_data_internal_avx512: | |
602e584f SP |
190 | /* One */ |
191 | .long 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000 | |
192 | // c4 | |
193 | .align 64 | |
194 | .long 0xbdc9ae9b, 0xbda6fcf4 | |
195 | .long 0xbd8bac76, 0xbd6bca30 | |
196 | .long 0xbd48a99b, 0xbd2c0a9f | |
197 | .long 0xbd1480db, 0xbd00faf2 | |
198 | .long 0xbe823aa9, 0xbe656348 | |
199 | .long 0xbe4afbb9, 0xbe346895 | |
200 | .long 0xbe20ffff, 0xbe103a0b | |
201 | .long 0xbe01a91c, 0xbde9e84e | |
202 | // c3 | |
203 | .align 64 | |
204 | .long 0x3e13d888, 0x3e10a87c | |
205 | .long 0x3e0b95c3, 0x3e057f0b | |
206 | .long 0x3dfde038, 0x3df080d9 | |
207 | .long 0x3de34c1e, 0x3dd68333 | |
208 | .long 0x3dac6e8e, 0x3dd54a51 | |
209 | .long 0x3df30f40, 0x3e04235d | |
210 | .long 0x3e0b7033, 0x3e102c90 | |
211 | .long 0x3e12ebad, 0x3e141ff8 | |
212 | // c2 | |
213 | .align 64 | |
214 | .long 0xbe5e5a9b, 0xbe5e2677 | |
215 | .long 0xbe5d83f5, 0xbe5c6016 | |
216 | .long 0xbe5abd0b, 0xbe58a6fd | |
217 | .long 0xbe562e02, 0xbe5362f8 | |
218 | .long 0xbe68e27c, 0xbe646747 | |
219 | .long 0xbe619a73, 0xbe5ff05a | |
220 | .long 0xbe5f0570, 0xbe5e92d0 | |
221 | .long 0xbe5e662b, 0xbe5e5c08 | |
222 | // c1 | |
223 | .align 64 | |
224 | .long 0x3ede5bd8, 0x3ede5b45 | |
225 | .long 0x3ede57d8, 0x3ede4eb1 | |
226 | .long 0x3ede3d37, 0x3ede2166 | |
227 | .long 0x3eddf9d9, 0x3eddc5bb | |
228 | .long 0x3ede08ed, 0x3ede32e7 | |
229 | .long 0x3ede4967, 0x3ede5490 | |
230 | .long 0x3ede597f, 0x3ede5b50 | |
231 | .long 0x3ede5bca, 0x3ede5bd9 | |
232 | /* L2 */ | |
233 | .align 64 | |
234 | .long 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b, 0x3e9a209b | |
235 | .align 64 | |
236 | .type __svml_slog10_data_internal_avx512, @object | |
237 | .size __svml_slog10_data_internal_avx512, .-__svml_slog10_data_internal_avx512 |