diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_s_log1pf4_core_sse4.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/svml_s_log1pf4_core_sse4.S | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/svml_s_log1pf4_core_sse4.S b/sysdeps/x86_64/fpu/multiarch/svml_s_log1pf4_core_sse4.S new file mode 100644 index 0000000000..ef1bae58c0 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/svml_s_log1pf4_core_sse4.S @@ -0,0 +1,252 @@ +/* Function log1pf vectorized with SSE4. + 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_slog1p_data_internal + */ +#define SgnMask 0 +#define sOne 16 +#define sPoly 32 +#define iHiDelta 160 +#define iLoRange 176 +#define iBrkValue 192 +#define iOffExpoMask 208 +#define sLn2 224 + +#include <sysdep.h> + + .text + .section .text.sse4,"ax",@progbits +ENTRY(_ZGVbN4v_log1pf_sse4) + subq $72, %rsp + cfi_def_cfa_offset(80) + movups sOne+__svml_slog1p_data_internal(%rip), %xmm7 + +/* compute 1+x as high, low parts */ + movaps %xmm7, %xmm1 + movaps %xmm7, %xmm5 + maxps %xmm0, %xmm1 + minps %xmm0, %xmm5 + movaps %xmm1, %xmm4 + +/* check argument value ranges */ + movdqu iHiDelta+__svml_slog1p_data_internal(%rip), %xmm2 + addps %xmm5, %xmm4 + +/* reduction: compute r,n */ + movdqu iBrkValue+__svml_slog1p_data_internal(%rip), %xmm3 + paddd %xmm4, %xmm2 + movdqu iOffExpoMask+__svml_slog1p_data_internal(%rip), %xmm8 + subps %xmm4, %xmm1 + psubd %xmm3, %xmm4 + addps %xmm1, %xmm5 + pand %xmm4, %xmm8 + psrad $23, %xmm4 + cvtdq2ps %xmm4, %xmm10 + pslld $23, %xmm4 + movaps %xmm7, %xmm1 + paddd %xmm3, %xmm8 + psubd %xmm4, %xmm1 + mulps %xmm5, %xmm1 + +/* polynomial evaluation */ + subps %xmm7, %xmm8 + +/* final reconstruction */ + mulps sLn2+__svml_slog1p_data_internal(%rip), %xmm10 + addps %xmm8, %xmm1 + movups sPoly+112+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + movdqu iLoRange+__svml_slog1p_data_internal(%rip), %xmm6 + pcmpgtd %xmm2, %xmm6 + addps sPoly+96+__svml_slog1p_data_internal(%rip), %xmm9 + +/* combine and get argument value range mask */ + movmskps %xmm6, %edx + movups SgnMask+__svml_slog1p_data_internal(%rip), %xmm11 + mulps %xmm1, %xmm9 + andnps %xmm0, %xmm11 + addps sPoly+80+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + addps sPoly+64+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + addps sPoly+48+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + addps sPoly+32+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + addps sPoly+16+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + addps sPoly+__svml_slog1p_data_internal(%rip), %xmm9 + mulps %xmm1, %xmm9 + mulps %xmm1, %xmm9 + addps %xmm9, %xmm1 + addps %xmm10, %xmm1 + orps %xmm11, %xmm1 + testl %edx, %edx + +/* Go to special inputs processing branch */ + jne L(SPECIAL_VALUES_BRANCH) + # LOE rbx rbp r12 r13 r14 r15 edx xmm0 xmm1 + +/* Restore registers + * and exit the function + */ + +L(EXIT): + movaps %xmm1, %xmm0 + addq $72, %rsp + cfi_def_cfa_offset(8) + ret + cfi_def_cfa_offset(80) + +/* Branch to process + * special inputs + */ + +L(SPECIAL_VALUES_BRANCH): + movups %xmm0, 32(%rsp) + movups %xmm1, 48(%rsp) + # LOE rbx rbp r12 r13 r14 r15 edx + + xorl %eax, %eax + movq %r12, 16(%rsp) + cfi_offset(12, -64) + movl %eax, %r12d + movq %r13, 8(%rsp) + cfi_offset(13, -72) + movl %edx, %r13d + movq %r14, (%rsp) + cfi_offset(14, -80) + # LOE rbx rbp r15 r12d r13d + +/* Range mask + * bits check + */ + +L(RANGEMASK_CHECK): + btl %r12d, %r13d + +/* Call scalar math function */ + jc L(SCALAR_MATH_CALL) + # LOE rbx rbp r15 r12d r13d + +/* Special inputs + * processing loop + */ + +L(SPECIAL_VALUES_LOOP): + incl %r12d + cmpl $4, %r12d + +/* Check bits in range mask */ + jl L(RANGEMASK_CHECK) + # LOE rbx rbp r15 r12d r13d + + movq 16(%rsp), %r12 + cfi_restore(12) + movq 8(%rsp), %r13 + cfi_restore(13) + movq (%rsp), %r14 + cfi_restore(14) + movups 48(%rsp), %xmm1 + +/* Go to exit */ + jmp L(EXIT) + cfi_offset(12, -64) + cfi_offset(13, -72) + cfi_offset(14, -80) + # LOE rbx rbp r12 r13 r14 r15 xmm1 + +/* Scalar math fucntion call + * to process special input + */ + +L(SCALAR_MATH_CALL): + movl %r12d, %r14d + movss 32(%rsp,%r14,4), %xmm0 + call log1pf@PLT + # LOE rbx rbp r14 r15 r12d r13d xmm0 + + movss %xmm0, 48(%rsp,%r14,4) + +/* Process special inputs in loop */ + jmp L(SPECIAL_VALUES_LOOP) + # LOE rbx rbp r15 r12d r13d +END(_ZGVbN4v_log1pf_sse4) + + .section .rodata, "a" + .align 16 + +#ifdef __svml_slog1p_data_internal_typedef +typedef unsigned int VUINT32; +typedef struct { + __declspec(align(16)) VUINT32 SgnMask[4][1]; + __declspec(align(16)) VUINT32 sOne[4][1]; + __declspec(align(16)) VUINT32 sPoly[8][4][1]; + __declspec(align(16)) VUINT32 iHiDelta[4][1]; + __declspec(align(16)) VUINT32 iLoRange[4][1]; + __declspec(align(16)) VUINT32 iBrkValue[4][1]; + __declspec(align(16)) VUINT32 iOffExpoMask[4][1]; + __declspec(align(16)) VUINT32 sLn2[4][1]; +} __svml_slog1p_data_internal; +#endif +__svml_slog1p_data_internal: + /*== SgnMask ==*/ + .long 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff + /*== sOne = SP 1.0 ==*/ + .align 16 + .long 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000 + /*== sPoly[] = SP polynomial ==*/ + .align 16 + .long 0xbf000000, 0xbf000000, 0xbf000000, 0xbf000000 /* -5.0000000000000000000000000e-01 P0 */ + .long 0x3eaaaa94, 0x3eaaaa94, 0x3eaaaa94, 0x3eaaaa94 /* 3.3333265781402587890625000e-01 P1 */ + .long 0xbe80058e, 0xbe80058e, 0xbe80058e, 0xbe80058e /* -2.5004237890243530273437500e-01 P2 */ + .long 0x3e4ce190, 0x3e4ce190, 0x3e4ce190, 0x3e4ce190 /* 2.0007920265197753906250000e-01 P3 */ + .long 0xbe28ad37, 0xbe28ad37, 0xbe28ad37, 0xbe28ad37 /* -1.6472326219081878662109375e-01 P4 */ + .long 0x3e0fcb12, 0x3e0fcb12, 0x3e0fcb12, 0x3e0fcb12 /* 1.4042308926582336425781250e-01 P5 */ + .long 0xbe1ad9e3, 0xbe1ad9e3, 0xbe1ad9e3, 0xbe1ad9e3 /* -1.5122179687023162841796875e-01 P6 */ + .long 0x3e0d84ed, 0x3e0d84ed, 0x3e0d84ed, 0x3e0d84ed /* 1.3820238411426544189453125e-01 P7 */ + /*== iHiDelta = SP 80000000-7f000000 ==*/ + .align 16 + .long 0x01000000, 0x01000000, 0x01000000, 0x01000000 + /*== iLoRange = SP 00800000+iHiDelta ==*/ + .align 16 + .long 0x01800000, 0x01800000, 0x01800000, 0x01800000 + /*== iBrkValue = SP 2/3 ==*/ + .align 16 + .long 0x3f2aaaab, 0x3f2aaaab, 0x3f2aaaab, 0x3f2aaaab + /*== iOffExpoMask = SP significand mask ==*/ + .align 16 + .long 0x007fffff, 0x007fffff, 0x007fffff, 0x007fffff + /*== sLn2 = SP ln(2) ==*/ + .align 16 + .long 0x3f317218, 0x3f317218, 0x3f317218, 0x3f317218 + .align 16 + .type __svml_slog1p_data_internal,@object + .size __svml_slog1p_data_internal,.-__svml_slog1p_data_internal |