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author | Sunil K Pandey <skpgkp2@gmail.com> | 2021-12-29 09:35:53 -0800 |
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committer | Sunil K Pandey <skpgkp2@gmail.com> | 2021-12-29 11:38:27 -0800 |
commit | 74265c16ab74d3df3c7520aed63e7820b6870d67 (patch) | |
tree | 5c5ce364a12b07dfe1f92eb85e12c661e06e2b3f /sysdeps/x86_64/fpu/multiarch/svml_d_log1p8_core_avx512.S | |
parent | 7e1722fec84c65bf95f249f9ad8d15ab12d8c853 (diff) | |
download | glibc-74265c16ab74d3df3c7520aed63e7820b6870d67.tar.gz glibc-74265c16ab74d3df3c7520aed63e7820b6870d67.tar.xz glibc-74265c16ab74d3df3c7520aed63e7820b6870d67.zip |
x86-64: Add vector log1p/log1pf implementation to libmvec
Implement vectorized log1p/log1pf containing SSE, AVX, AVX2 and AVX512 versions for libmvec as per vector ABI. It also contains accuracy and ABI tests for vector log1p/log1pf with regenerated ulps. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_d_log1p8_core_avx512.S')
-rw-r--r-- | sysdeps/x86_64/fpu/multiarch/svml_d_log1p8_core_avx512.S | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/svml_d_log1p8_core_avx512.S b/sysdeps/x86_64/fpu/multiarch/svml_d_log1p8_core_avx512.S new file mode 100644 index 0000000000..5e38ff8d39 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/svml_d_log1p8_core_avx512.S @@ -0,0 +1,317 @@ +/* Function log1p vectorized with AVX-512. + Copyright (C) 2021 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: + * + * 1+x = 2^k*(xh + xl) is computed in high-low parts; xh in [1,2) + * Get short reciprocal approximation Rcp ~ 1/xh + * R = (Rcp*xh - 1.0) + Rcp*xl + * log1p(x) = k*log(2.0) - log(Rcp) + poly(R) + * log(Rcp) is tabulated + * + * + */ + +/* Offsets for data table __svml_dlog1p_data_internal_avx512 + */ +#define Log_tbl 0 +#define One 128 +#define SgnMask 192 +#define C075 256 +#define poly_coeff9 320 +#define poly_coeff8 384 +#define poly_coeff7 448 +#define poly_coeff6 512 +#define poly_coeff5 576 +#define poly_coeff4 640 +#define poly_coeff3 704 +#define poly_coeff2 768 +#define L2 832 + +#include <sysdep.h> + + .text + .section .text.evex512,"ax",@progbits +ENTRY(_ZGVeN8v_log1p_skx) + pushq %rbp + cfi_def_cfa_offset(16) + movq %rsp, %rbp + cfi_def_cfa(6, 16) + cfi_offset(6, -16) + andq $-64, %rsp + subq $192, %rsp + vmovups One+__svml_dlog1p_data_internal_avx512(%rip), %zmm7 + vmovups SgnMask+__svml_dlog1p_data_internal_avx512(%rip), %zmm14 + vmovaps %zmm0, %zmm9 + vaddpd {rn-sae}, %zmm9, %zmm7, %zmm11 + vandpd %zmm14, %zmm9, %zmm8 + +/* compute 1+x as high, low parts */ + vmaxpd {sae}, %zmm9, %zmm7, %zmm10 + vminpd {sae}, %zmm9, %zmm7, %zmm12 + +/* GetMant(x), normalized to [1,2) for x>=0, NaN for x<0 */ + vgetmantpd $8, {sae}, %zmm11, %zmm6 + +/* GetExp(x) */ + vgetexppd {sae}, %zmm11, %zmm5 + vsubpd {rn-sae}, %zmm10, %zmm11, %zmm13 + +/* DblRcp ~ 1/Mantissa */ + vrcp14pd %zmm6, %zmm15 + +/* Start polynomial evaluation */ + vmovups poly_coeff9+__svml_dlog1p_data_internal_avx512(%rip), %zmm10 + vmovups poly_coeff7+__svml_dlog1p_data_internal_avx512(%rip), %zmm11 + +/* Xl */ + vsubpd {rn-sae}, %zmm13, %zmm12, %zmm2 + vxorpd %zmm14, %zmm5, %zmm3 + +/* round DblRcp to 4 fractional bits (RN mode, no Precision exception) */ + vrndscalepd $88, {sae}, %zmm15, %zmm4 + vmovups poly_coeff5+__svml_dlog1p_data_internal_avx512(%rip), %zmm12 + vmovups poly_coeff6+__svml_dlog1p_data_internal_avx512(%rip), %zmm14 + vmovups poly_coeff3+__svml_dlog1p_data_internal_avx512(%rip), %zmm13 + +/* Xl*2^(-Expon) */ + vscalefpd {rn-sae}, %zmm3, %zmm2, %zmm1 + +/* Reduced argument: R = DblRcp*(Mantissa+Xl) - 1 */ + vfmsub213pd {rn-sae}, %zmm7, %zmm4, %zmm6 + vmovups __svml_dlog1p_data_internal_avx512(%rip), %zmm3 + +/* + * Table lookup + * Prepare exponent correction: DblRcp<0.75? + */ + vmovups C075+__svml_dlog1p_data_internal_avx512(%rip), %zmm2 + +/* Prepare table index */ + vpsrlq $48, %zmm4, %zmm0 + vfmadd231pd {rn-sae}, %zmm4, %zmm1, %zmm6 + vmovups poly_coeff8+__svml_dlog1p_data_internal_avx512(%rip), %zmm1 + vcmppd $17, {sae}, %zmm2, %zmm4, %k1 + vcmppd $4, {sae}, %zmm6, %zmm6, %k0 + vfmadd231pd {rn-sae}, %zmm6, %zmm10, %zmm1 + vmovups poly_coeff4+__svml_dlog1p_data_internal_avx512(%rip), %zmm10 + vfmadd231pd {rn-sae}, %zmm6, %zmm11, %zmm14 + vmovups L2+__svml_dlog1p_data_internal_avx512(%rip), %zmm4 + vpermt2pd Log_tbl+64+__svml_dlog1p_data_internal_avx512(%rip), %zmm0, %zmm3 + +/* add 1 to Expon if DblRcp<0.75 */ + vaddpd {rn-sae}, %zmm7, %zmm5, %zmm5{%k1} + +/* R^2 */ + vmulpd {rn-sae}, %zmm6, %zmm6, %zmm0 + vfmadd231pd {rn-sae}, %zmm6, %zmm12, %zmm10 + vmovups poly_coeff2+__svml_dlog1p_data_internal_avx512(%rip), %zmm12 + vmulpd {rn-sae}, %zmm0, %zmm0, %zmm15 + vfmadd231pd {rn-sae}, %zmm6, %zmm13, %zmm12 + vfmadd213pd {rn-sae}, %zmm14, %zmm0, %zmm1 + kmovw %k0, %edx + vfmadd213pd {rn-sae}, %zmm12, %zmm0, %zmm10 + +/* polynomial */ + vfmadd213pd {rn-sae}, %zmm10, %zmm15, %zmm1 + vfmadd213pd {rn-sae}, %zmm6, %zmm0, %zmm1 + vaddpd {rn-sae}, %zmm1, %zmm3, %zmm6 + vfmadd213pd {rn-sae}, %zmm6, %zmm4, %zmm5 + vorpd %zmm8, %zmm5, %zmm0 + testl %edx, %edx + +/* Go to special inputs processing branch */ + jne L(SPECIAL_VALUES_BRANCH) + # LOE rbx r12 r13 r14 r15 edx zmm0 zmm9 + +/* Restore registers + * and exit the function + */ + +L(EXIT): + movq %rbp, %rsp + popq %rbp + cfi_def_cfa(7, 8) + cfi_restore(6) + ret + cfi_def_cfa(6, 16) + cfi_offset(6, -16) + +/* Branch to process + * special inputs + */ + +L(SPECIAL_VALUES_BRANCH): + vmovups %zmm9, 64(%rsp) + vmovups %zmm0, 128(%rsp) + # LOE rbx r12 r13 r14 r15 edx zmm0 + + xorl %eax, %eax + # LOE rbx r12 r13 r14 r15 eax edx + + vzeroupper + movq %r12, 16(%rsp) + /* 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) */ + .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 0xff, 0xff, 0xff, 0x22 + movl %eax, %r12d + movq %r13, 8(%rsp) + /* 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) */ + .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 0xff, 0xff, 0xff, 0x22 + movl %edx, %r13d + movq %r14, (%rsp) + /* 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) */ + .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22 + # LOE rbx r15 r12d r13d + +/* Range mask + * bits check + */ + +L(RANGEMASK_CHECK): + btl %r12d, %r13d + +/* Call scalar math function */ + jc L(SCALAR_MATH_CALL) + # LOE rbx r15 r12d r13d + +/* Special inputs + * processing loop + */ + +L(SPECIAL_VALUES_LOOP): + incl %r12d + cmpl $8, %r12d + +/* Check bits in range mask */ + jl L(RANGEMASK_CHECK) + # LOE rbx r15 r12d r13d + + movq 16(%rsp), %r12 + cfi_restore(12) + movq 8(%rsp), %r13 + cfi_restore(13) + movq (%rsp), %r14 + cfi_restore(14) + vmovups 128(%rsp), %zmm0 + +/* Go to exit */ + jmp L(EXIT) + /* 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) */ + .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 0xff, 0xff, 0xff, 0x22 + /* 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) */ + .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 0xff, 0xff, 0xff, 0x22 + /* 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) */ + .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22 + # LOE rbx r12 r13 r14 r15 zmm0 + +/* Scalar math fucntion call + * to process special input + */ + +L(SCALAR_MATH_CALL): + movl %r12d, %r14d + movsd 64(%rsp,%r14,8), %xmm0 + call log1p@PLT + # LOE rbx r14 r15 r12d r13d xmm0 + + movsd %xmm0, 128(%rsp,%r14,8) + +/* Process special inputs in loop */ + jmp L(SPECIAL_VALUES_LOOP) + # LOE rbx r15 r12d r13d +END(_ZGVeN8v_log1p_skx) + + .section .rodata, "a" + .align 64 + +#ifdef __svml_dlog1p_data_internal_avx512_typedef +typedef unsigned int VUINT32; +typedef struct { + __declspec(align(64)) VUINT32 Log_tbl[16][2]; + __declspec(align(64)) VUINT32 One[8][2]; + __declspec(align(64)) VUINT32 SgnMask[8][2]; + __declspec(align(64)) VUINT32 C075[8][2]; + __declspec(align(64)) VUINT32 poly_coeff9[8][2]; + __declspec(align(64)) VUINT32 poly_coeff8[8][2]; + __declspec(align(64)) VUINT32 poly_coeff7[8][2]; + __declspec(align(64)) VUINT32 poly_coeff6[8][2]; + __declspec(align(64)) VUINT32 poly_coeff5[8][2]; + __declspec(align(64)) VUINT32 poly_coeff4[8][2]; + __declspec(align(64)) VUINT32 poly_coeff3[8][2]; + __declspec(align(64)) VUINT32 poly_coeff2[8][2]; + __declspec(align(64)) VUINT32 L2[8][2]; + } __svml_dlog1p_data_internal_avx512; +#endif +__svml_dlog1p_data_internal_avx512: + /*== Log_tbl ==*/ + .quad 0x0000000000000000 + .quad 0xbfaf0a30c01162a6 + .quad 0xbfbe27076e2af2e6 + .quad 0xbfc5ff3070a793d4 + .quad 0xbfcc8ff7c79a9a22 + .quad 0xbfd1675cababa60e + .quad 0xbfd4618bc21c5ec2 + .quad 0xbfd739d7f6bbd007 + .quad 0x3fd269621134db92 + .quad 0x3fcf991c6cb3b379 + .quad 0x3fca93ed3c8ad9e3 + .quad 0x3fc5bf406b543db2 + .quad 0x3fc1178e8227e47c + .quad 0x3fb9335e5d594989 + .quad 0x3fb08598b59e3a07 + .quad 0x3fa0415d89e74444 + /*== One ==*/ + .align 64 + .quad 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000 + /*== SgnMask ==*/ + .align 64 + .quad 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x8000000000000000 + /*== C075 0.75 ==*/ + .align 64 + .quad 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000 + /*== poly_coeff9 ==*/ + .align 64 + .quad 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70, 0x3fbC81CD309D7C70 + /*== poly_coeff8 ==*/ + .align 64 + .quad 0xbfc007357E93AF62, 0xbfc007357E93AF62, 0xbfc007357E93AF62, 0xbfc007357E93AF62, 0xbfc007357E93AF62, 0xbfc007357E93AF62, 0xbfc007357E93AF62, 0xbfc007357E93AF62 + /*== poly_coeff7 ==*/ + .align 64 + .quad 0x3fc249229CEE81EF, 0x3fc249229CEE81EF, 0x3fc249229CEE81EF, 0x3fc249229CEE81EF, 0x3fc249229CEE81EF, 0x3fc249229CEE81EF, 0x3fc249229CEE81EF, 0x3fc249229CEE81EF + /*== poly_coeff6 ==*/ + .align 64 + .quad 0xbfc55553FB28DB06, 0xbfc55553FB28DB06, 0xbfc55553FB28DB06, 0xbfc55553FB28DB06, 0xbfc55553FB28DB06, 0xbfc55553FB28DB06, 0xbfc55553FB28DB06, 0xbfc55553FB28DB06 + /*== poly_coeff5 ==*/ + .align 64 + .quad 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C, 0x3fc9999999CC9F5C + /*== poly_coeff4 ==*/ + .align 64 + .quad 0xbfd00000000C05BD, 0xbfd00000000C05BD, 0xbfd00000000C05BD, 0xbfd00000000C05BD, 0xbfd00000000C05BD, 0xbfd00000000C05BD, 0xbfd00000000C05BD, 0xbfd00000000C05BD + /*== poly_coeff3 ==*/ + .align 64 + .quad 0x3fd5555555555466, 0x3fd5555555555466, 0x3fd5555555555466, 0x3fd5555555555466, 0x3fd5555555555466, 0x3fd5555555555466, 0x3fd5555555555466, 0x3fd5555555555466 + /*== poly_coeff2 ==*/ + .align 64 + .quad 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6, 0xbfdFFFFFFFFFFFC6 + /*== L2 = log(2) ==*/ + .align 64 + .quad 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF, 0x3fe62E42FEFA39EF + .align 64 + .type __svml_dlog1p_data_internal_avx512,@object + .size __svml_dlog1p_data_internal_avx512,.-__svml_dlog1p_data_internal_avx512 |