diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_d_log2_core_sse4.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/svml_d_log2_core_sse4.S | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/svml_d_log2_core_sse4.S b/sysdeps/x86_64/fpu/multiarch/svml_d_log2_core_sse4.S deleted file mode 100644 index 7d4b3c8850..0000000000 --- a/sysdeps/x86_64/fpu/multiarch/svml_d_log2_core_sse4.S +++ /dev/null @@ -1,229 +0,0 @@ -/* Function log vectorized with SSE4. - Copyright (C) 2014-2017 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 - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include "svml_d_log_data.h" - - .text -ENTRY (_ZGVbN2v_log_sse4) -/* - ALGORITHM DESCRIPTION: - - log(x) = -log(Rcp) + log(Rcp*x), - where Rcp ~ 1/x (accuracy ~9 bits, obtained by rounding - HW approximation to 1+9 mantissa bits) - - Reduced argument R=Rcp*x-1 is used to approximate log(1+R) as polynomial - - log(Rcp) = exponent_Rcp*log(2) + log(mantissa_Rcp) - -log(mantissa_Rcp) is obtained from a lookup table, - accessed by a 9-bit index - */ - pushq %rbp - cfi_adjust_cfa_offset (8) - cfi_rel_offset (%rbp, 0) - movq %rsp, %rbp - cfi_def_cfa_register (%rbp) - andq $-64, %rsp - subq $320, %rsp - movaps %xmm0, %xmm6 - movq __svml_dlog_data@GOTPCREL(%rip), %r8 - movaps %xmm6, %xmm3 - movaps %xmm6, %xmm2 - -/* isolate exponent bits */ - movaps %xmm6, %xmm1 - psrlq $20, %xmm1 - movups _ExpMask(%r8), %xmm5 - -/* preserve mantissa, set input exponent to 2^(-10) */ - andps %xmm6, %xmm5 - orps _Two10(%r8), %xmm5 - -/* reciprocal approximation good to at least 11 bits */ - cvtpd2ps %xmm5, %xmm7 - cmpltpd _MinNorm(%r8), %xmm3 - cmpnlepd _MaxNorm(%r8), %xmm2 - movlhps %xmm7, %xmm7 - -/* combine and get argument value range mask */ - orps %xmm2, %xmm3 - rcpps %xmm7, %xmm0 - movmskpd %xmm3, %eax - movups _HalfMask(%r8), %xmm2 - -/* argument reduction started: R = Mantissa*Rcp - 1 */ - andps %xmm5, %xmm2 - cvtps2pd %xmm0, %xmm4 - subpd %xmm2, %xmm5 - -/* round reciprocal to nearest integer, will have 1+9 mantissa bits */ - roundpd $0, %xmm4, %xmm4 - mulpd %xmm4, %xmm2 - mulpd %xmm4, %xmm5 - subpd _One(%r8), %xmm2 - addpd %xmm2, %xmm5 - movups _Threshold(%r8), %xmm2 - -/* calculate index for table lookup */ - movaps %xmm4, %xmm3 - cmpltpd %xmm4, %xmm2 - pshufd $221, %xmm1, %xmm7 - psrlq $40, %xmm3 - -/* convert biased exponent to DP format */ - cvtdq2pd %xmm7, %xmm0 - movd %xmm3, %edx - movups _poly_coeff_1(%r8), %xmm4 - -/* polynomial computation */ - mulpd %xmm5, %xmm4 - andps _Bias(%r8), %xmm2 - orps _Bias1(%r8), %xmm2 - -/* - Table stores -log(0.5*mantissa) for larger mantissas, - adjust exponent accordingly - */ - subpd %xmm2, %xmm0 - addpd _poly_coeff_2(%r8), %xmm4 - -/* exponent*log(2.0) */ - mulpd _L2(%r8), %xmm0 - movaps %xmm5, %xmm2 - mulpd %xmm5, %xmm2 - movups _poly_coeff_3(%r8), %xmm7 - mulpd %xmm5, %xmm7 - mulpd %xmm2, %xmm4 - addpd _poly_coeff_4(%r8), %xmm7 - addpd %xmm4, %xmm7 - mulpd %xmm7, %xmm2 - movslq %edx, %rdx - pextrd $2, %xmm3, %ecx - -/* - reconstruction: - (exponent*log(2)) + (LogRcp + (R+poly)) - */ - addpd %xmm2, %xmm5 - movslq %ecx, %rcx - movsd _LogRcp_lookup(%r8,%rdx), %xmm1 - movhpd _LogRcp_lookup(%r8,%rcx), %xmm1 - addpd %xmm5, %xmm1 - addpd %xmm1, %xmm0 - testl %eax, %eax - jne .LBL_1_3 - -.LBL_1_2: - cfi_remember_state - movq %rbp, %rsp - cfi_def_cfa_register (%rsp) - popq %rbp - cfi_adjust_cfa_offset (-8) - cfi_restore (%rbp) - ret - -.LBL_1_3: - cfi_restore_state - movups %xmm6, 192(%rsp) - movups %xmm0, 256(%rsp) - je .LBL_1_2 - - xorb %cl, %cl - xorl %edx, %edx - movups %xmm8, 112(%rsp) - movups %xmm9, 96(%rsp) - movups %xmm10, 80(%rsp) - movups %xmm11, 64(%rsp) - movups %xmm12, 48(%rsp) - movups %xmm13, 32(%rsp) - movups %xmm14, 16(%rsp) - movups %xmm15, (%rsp) - movq %rsi, 136(%rsp) - movq %rdi, 128(%rsp) - movq %r12, 168(%rsp) - cfi_offset_rel_rsp (12, 168) - movb %cl, %r12b - movq %r13, 160(%rsp) - cfi_offset_rel_rsp (13, 160) - movl %eax, %r13d - movq %r14, 152(%rsp) - cfi_offset_rel_rsp (14, 152) - movl %edx, %r14d - movq %r15, 144(%rsp) - cfi_offset_rel_rsp (15, 144) - cfi_remember_state - -.LBL_1_6: - btl %r14d, %r13d - jc .LBL_1_12 - -.LBL_1_7: - lea 1(%r14), %esi - btl %esi, %r13d - jc .LBL_1_10 - -.LBL_1_8: - incb %r12b - addl $2, %r14d - cmpb $16, %r12b - jb .LBL_1_6 - - movups 112(%rsp), %xmm8 - movups 96(%rsp), %xmm9 - movups 80(%rsp), %xmm10 - movups 64(%rsp), %xmm11 - movups 48(%rsp), %xmm12 - movups 32(%rsp), %xmm13 - movups 16(%rsp), %xmm14 - movups (%rsp), %xmm15 - movq 136(%rsp), %rsi - movq 128(%rsp), %rdi - movq 168(%rsp), %r12 - cfi_restore (%r12) - movq 160(%rsp), %r13 - cfi_restore (%r13) - movq 152(%rsp), %r14 - cfi_restore (%r14) - movq 144(%rsp), %r15 - cfi_restore (%r15) - movups 256(%rsp), %xmm0 - jmp .LBL_1_2 - -.LBL_1_10: - cfi_restore_state - movzbl %r12b, %r15d - shlq $4, %r15 - movsd 200(%rsp,%r15), %xmm0 - - call JUMPTARGET(__log_finite) - - movsd %xmm0, 264(%rsp,%r15) - jmp .LBL_1_8 - -.LBL_1_12: - movzbl %r12b, %r15d - shlq $4, %r15 - movsd 192(%rsp,%r15), %xmm0 - - call JUMPTARGET(__log_finite) - - movsd %xmm0, 256(%rsp,%r15) - jmp .LBL_1_7 - -END (_ZGVbN2v_log_sse4) |