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https://github.com/reactos/reactos.git
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566 lines
16 KiB
NASM
566 lines
16 KiB
NASM
;
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; MIT License
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; -----------
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;
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; Copyright (c) 2002-2019 Advanced Micro Devices, Inc.
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this Software and associated documentaon files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in
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; all copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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; THE SOFTWARE.
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;
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; log10.asm
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;
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; An implementation of the log10 libm function.
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;
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; Prototype:
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;
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; double log10(double x);
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;
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;
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; Algorithm:
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; Similar to one presnted in log.asm
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;
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.const
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ALIGN 16
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__real_ninf DQ 0fff0000000000000h ; -inf
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DQ 0000000000000000h
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__real_inf DQ 7ff0000000000000h ; +inf
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DQ 0000000000000000h
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__real_neg_qnan DQ 0fff8000000000000h ; neg qNaN
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DQ 0000000000000000h
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__real_qnanbit DQ 0008000000000000h
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DQ 0000000000000000h
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__int_1023 DQ 00000000000003ffh
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DQ 0000000000000000h
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__mask_001 DQ 0000000000000001h
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DQ 0000000000000000h
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__mask_mant DQ 000FFFFFFFFFFFFFh ; mask for mantissa bits
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DQ 0000000000000000h
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__mask_mant_top8 DQ 000ff00000000000h ; mask for top 8 mantissa bits
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DQ 0000000000000000h
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__mask_mant9 DQ 0000080000000000h ; mask for 9th mantissa bit
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DQ 0000000000000000h
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__real_log10_e DQ 3fdbcb7b1526e50eh
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DQ 0000000000000000h
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__real_log10_e_lead DQ 3fdbcb7800000000h ; log10e_lead 4.34293746948242187500e-01
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DQ 0000000000000000h
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__real_log10_e_tail DQ 3ea8a93728719535h ; log10e_tail 7.3495500964015109100644e-7
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DQ 0000000000000000h
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__real_log10_2_lead DQ 3fd3441350000000h
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DQ 0000000000000000h
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__real_log10_2_tail DQ 3e03ef3fde623e25h
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DQ 0000000000000000h
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__real_two DQ 4000000000000000h ; 2
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DQ 0000000000000000h
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__real_one DQ 3ff0000000000000h ; 1
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DQ 0000000000000000h
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__real_half DQ 3fe0000000000000h ; 1/2
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DQ 0000000000000000h
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__mask_100 DQ 0000000000000100h
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DQ 0000000000000000h
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__real_1_over_512 DQ 3f60000000000000h
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DQ 0000000000000000h
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__real_1_over_2 DQ 3fe0000000000000h
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DQ 0000000000000000h
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__real_1_over_3 DQ 3fd5555555555555h
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DQ 0000000000000000h
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__real_1_over_4 DQ 3fd0000000000000h
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DQ 0000000000000000h
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__real_1_over_5 DQ 3fc999999999999ah
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DQ 0000000000000000h
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__real_1_over_6 DQ 3fc5555555555555h
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DQ 0000000000000000h
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__real_neg_1023 DQ 0c08ff80000000000h
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DQ 0000000000000000h
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__mask_2045 DQ 00000000000007fdh
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DQ 0000000000000000h
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__real_threshold DQ 3fb0000000000000h ; .0625
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DQ 0000000000000000h
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__real_near_one_lt DQ 3fee000000000000h ; .9375
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DQ 0000000000000000h
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__real_near_one_gt DQ 3ff1000000000000h ; 1.0625
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DQ 0000000000000000h
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__real_min_norm DQ 0010000000000000h
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DQ 0000000000000000h
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__real_notsign DQ 7ffFFFFFFFFFFFFFh ; ^sign bit
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DQ 0000000000000000h
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__real_ca1 DQ 3fb55555555554e6h ; 8.33333333333317923934e-02
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DQ 0000000000000000h
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__real_ca2 DQ 3f89999999bac6d4h ; 1.25000000037717509602e-02
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DQ 0000000000000000h
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__real_ca3 DQ 3f62492307f1519fh ; 2.23213998791944806202e-03
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DQ 0000000000000000h
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__real_ca4 DQ 3f3c8034c85dfff0h ; 4.34887777707614552256e-04
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DQ 0000000000000000h
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__mask_lower DQ 0ffffffff00000000h
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DQ 0000000000000000h
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; these codes and the ones in the corresponding .c file have to match
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__flag_x_zero DD 00000001
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__flag_x_neg DD 00000002
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__flag_x_nan DD 00000003
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EXTRN __log10_256_lead:QWORD
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EXTRN __log10_256_tail:QWORD
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EXTRN __log_F_inv_qword:QWORD
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EXTRN __use_fma3_lib:DWORD
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; local variable storage offsets
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save_xmm6 EQU 20h
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dummy_space EQU 30h
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stack_size EQU 058h
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include fm.inc
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fname TEXTEQU <log10>
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fname_special TEXTEQU <_log10_special>
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EXTERN fname_special:PROC
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.code
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ALIGN 16
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PUBLIC fname
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fname PROC FRAME
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StackAllocate stack_size
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SaveXmm xmm6, save_xmm6
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.ENDPROLOG
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cmp DWORD PTR __use_fma3_lib, 0
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jne Llog10_fma3
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Llog10_sse2:
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; compute exponent part
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movapd xmm3, xmm0
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movapd xmm4, xmm0
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psrlq xmm3, 52
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movd rax, xmm0
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psubq xmm3, XMMWORD PTR __int_1023 ; xmm3 <-- unbiased exponent
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; NaN or inf
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movapd xmm5, xmm0
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andpd xmm5, XMMWORD PTR __real_inf
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comisd xmm5, QWORD PTR __real_inf
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je Llog10_sse2_x_is_inf_or_nan
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movapd xmm2, xmm0
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cvtdq2pd xmm6, xmm3 ; xmm6 <-- unbiased exp as double
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pand xmm2, XMMWORD PTR __mask_mant
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subsd xmm4, QWORD PTR __real_one
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comisd xmm6, QWORD PTR __real_neg_1023
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je Llog10_sse2_denormal_adjust
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Llog10_sse2_continue_common:
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andpd xmm4, XMMWORD PTR __real_notsign
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; compute index into the log tables
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mov r9, rax
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and rax, QWORD PTR __mask_mant_top8
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and r9, QWORD PTR __mask_mant9
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shl r9, 1
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add rax, r9
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movd xmm1, rax
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; near one codepath
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comisd xmm4, QWORD PTR __real_threshold
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jb Llog10_sse2_near_one
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; F, Y
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shr rax, 44
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por xmm2, XMMWORD PTR __real_half
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por xmm1, XMMWORD PTR __real_half
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lea r9, QWORD PTR __log_F_inv_qword
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; check for negative numbers or zero
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xorpd xmm5, xmm5
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comisd xmm0, xmm5
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jbe Llog10_sse2_x_is_zero_or_neg
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; f = F - Y, r = f * inv
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subsd xmm1, xmm2
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mulsd xmm1, QWORD PTR [r9+rax*8]
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movapd xmm2, xmm1
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movapd xmm0, xmm1
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lea r9, QWORD PTR __log10_256_lead
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; poly
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movsd xmm3, QWORD PTR __real_1_over_6
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movsd xmm1, QWORD PTR __real_1_over_3
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mulsd xmm3, xmm2
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mulsd xmm1, xmm2
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mulsd xmm0, xmm2
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movapd xmm4, xmm0
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addsd xmm3, QWORD PTR __real_1_over_5
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addsd xmm1, QWORD PTR __real_1_over_2
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mulsd xmm4, xmm0
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mulsd xmm3, xmm2
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mulsd xmm1, xmm0
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addsd xmm3, QWORD PTR __real_1_over_4
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addsd xmm1, xmm2
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mulsd xmm3, xmm4
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addsd xmm1, xmm3
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movsd xmm5, QWORD PTR __real_log10_2_tail
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mulsd xmm1, QWORD PTR __real_log10_e
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; m*log(10) + log10(G) - poly
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mulsd xmm5, xmm6
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subsd xmm5, xmm1
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movsd xmm0, QWORD PTR [r9+rax*8]
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lea rdx, QWORD PTR __log10_256_tail
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movsd xmm2, QWORD PTR [rdx+rax*8]
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movsd xmm4, QWORD PTR __real_log10_2_lead
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mulsd xmm4, xmm6
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addsd xmm0, xmm4
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addsd xmm2, xmm5
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addsd xmm0, xmm2
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RestoreXmm xmm6, save_xmm6
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StackDeallocate stack_size
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ret
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ALIGN 16
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Llog10_sse2_near_one:
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; r = x - 1.0
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movsd xmm2, QWORD PTR __real_two
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subsd xmm0, QWORD PTR __real_one ; r
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addsd xmm2, xmm0
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movapd xmm1, xmm0
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divsd xmm1, xmm2 ; r/(2+r) = u/2
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movsd xmm4, QWORD PTR __real_ca2
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movsd xmm5, QWORD PTR __real_ca4
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movapd xmm6, xmm0
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mulsd xmm6, xmm1 ; correction
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addsd xmm1, xmm1 ; u
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movapd xmm2, xmm1
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mulsd xmm2, xmm1 ; u^2
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mulsd xmm4, xmm2
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mulsd xmm5, xmm2
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addsd xmm4, QWORD PTR __real_ca1
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addsd xmm5, QWORD PTR __real_ca3
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mulsd xmm2, xmm1 ; u^3
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mulsd xmm4, xmm2
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mulsd xmm2, xmm2
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mulsd xmm2, xmm1 ; u^7
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mulsd xmm5, xmm2
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movsd xmm2, QWORD PTR __real_log10_e_tail
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addsd xmm4, xmm5
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subsd xmm4, xmm6
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movsd xmm6, QWORD PTR __real_log10_e_lead
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movapd xmm3, xmm0
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pand xmm3, XMMWORD PTR __mask_lower
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subsd xmm0, xmm3
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addsd xmm4, xmm0
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movapd xmm0, xmm3
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movapd xmm1, xmm4
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mulsd xmm4, xmm2
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mulsd xmm0, xmm2
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mulsd xmm1, xmm6
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mulsd xmm3, xmm6
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addsd xmm0, xmm4
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addsd xmm0, xmm1
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addsd xmm0, xmm3
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RestoreXmm xmm6, save_xmm6
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StackDeallocate stack_size
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ret
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Llog10_sse2_denormal_adjust:
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por xmm2, XMMWORD PTR __real_one
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subsd xmm2, QWORD PTR __real_one
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movsd xmm5, xmm2
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pand xmm2, XMMWORD PTR __mask_mant
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movd rax, xmm2
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psrlq xmm5, 52
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psubd xmm5, XMMWORD PTR __mask_2045
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cvtdq2pd xmm6, xmm5
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jmp Llog10_sse2_continue_common
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ALIGN 16
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Llog10_sse2_x_is_zero_or_neg:
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jne Llog10_sse2_x_is_neg
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movsd xmm1, QWORD PTR __real_ninf
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mov r8d, DWORD PTR __flag_x_zero
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call fname_special
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jmp Llog10_sse2_finish
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ALIGN 16
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Llog10_sse2_x_is_neg:
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movsd xmm1, QWORD PTR __real_neg_qnan
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mov r8d, DWORD PTR __flag_x_neg
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call fname_special
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jmp Llog10_sse2_finish
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ALIGN 16
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Llog10_sse2_x_is_inf_or_nan:
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cmp rax, QWORD PTR __real_inf
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je Llog10_sse2_finish
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cmp rax, QWORD PTR __real_ninf
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je Llog10_sse2_x_is_neg
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or rax, QWORD PTR __real_qnanbit
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movd xmm1, rax
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mov r8d, DWORD PTR __flag_x_nan
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call fname_special
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jmp Llog10_sse2_finish
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ALIGN 16
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Llog10_sse2_finish:
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RestoreXmm xmm6, save_xmm6
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StackDeallocate stack_size
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ret
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ALIGN 16
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Llog10_fma3:
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; compute exponent part
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xor rax,rax
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vpsrlq xmm3,xmm0,52
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vmovq rax,xmm0
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vpsubq xmm3,xmm3,QWORD PTR __int_1023
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vcvtdq2pd xmm6,xmm3 ; xmm6 <-- (double)xexp
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; NaN or Inf?
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vpand xmm5,xmm0,__real_inf
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vcomisd xmm5,QWORD PTR __real_inf
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je Llog10_fma3_x_is_inf_or_nan
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; negative number or zero?
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vpxor xmm5,xmm5,xmm5
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vcomisd xmm0,xmm5
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jbe Llog10_fma3_x_is_zero_or_neg
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vpand xmm2,xmm0,__mask_mant
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vsubsd xmm4,xmm0,QWORD PTR __real_one
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; Subnormal?
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vcomisd xmm6,QWORD PTR __real_neg_1023
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je Llog10_fma3_denormal_adjust
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Llog10_fma3_continue_common:
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; compute index into the log tables
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vpand xmm1,xmm0,DWORD PTR __mask_mant_top8
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vpand xmm3,xmm0,DWORD PTR __mask_mant9
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vpsllq xmm3,xmm3,1
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vpaddq xmm1,xmm3,xmm1
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vmovq rax,xmm1
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; near one codepath
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vpand xmm4,xmm4,DWORD PTR __real_notsign
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vcomisd xmm4,QWORD PTR __real_threshold
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jb Llog10_fma3_near_one
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; F,Y
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shr rax,44
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vpor xmm2,xmm2,DWORD PTR __real_half
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vpor xmm1,xmm1,DWORD PTR __real_half
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lea r9,DWORD PTR __log_F_inv_qword
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; f = F - Y,r = f * inv
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vsubsd xmm1,xmm1,xmm2
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vmulsd xmm1,xmm1,QWORD PTR [r9 + rax * 8]
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lea r9,DWORD PTR __log10_256_lead
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; poly
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vmulsd xmm0,xmm1,xmm1 ; r*r
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vmovsd xmm3,QWORD PTR __real_1_over_6
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vmovsd xmm5,QWORD PTR __real_1_over_3
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vfmadd213sd xmm3,xmm1,QWORD PTR __real_1_over_5 ; r*1/6 + 1/5
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vfmadd213sd xmm5,xmm1,QWORD PTR __real_half ; 1/2+r*1/3
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movsd xmm4,xmm0 ; r*r
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vfmadd213sd xmm3 ,xmm1,QWORD PTR __real_1_over_4 ; 1/4+(1/5*r+r*r*1/6)
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vmulsd xmm4,xmm0,xmm0 ; r*r*r*r
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vfmadd231sd xmm1,xmm5,xmm0 ; r*r*(1/2+r*1/3) + r
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vfmadd231sd xmm1,xmm3,xmm4
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vmulsd xmm1,xmm1,QWORD PTR __real_log10_e
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; m*log(2) + log(G) - poly*log10_e
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vmovsd xmm5,QWORD PTR __real_log10_2_tail
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vfmsub213sd xmm5,xmm6,xmm1
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movsd xmm0,QWORD PTR [r9 + rax * 8]
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lea rdx,DWORD PTR __log10_256_tail
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movsd xmm2,QWORD PTR [rdx + rax * 8]
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vaddsd xmm2,xmm2,xmm5
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vfmadd231sd xmm0,xmm6,QWORD PTR __real_log10_2_lead
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vaddsd xmm0,xmm0,xmm2
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AVXRestoreXmm xmm6, save_xmm6
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StackDeallocate stack_size
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ret
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ALIGN 16
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Llog10_fma3_near_one:
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; r = x - 1.0
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vmovsd xmm2,QWORD PTR __real_two
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vsubsd xmm0,xmm0,QWORD PTR __real_one ; r
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vaddsd xmm2,xmm2,xmm0
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vdivsd xmm1,xmm0,xmm2 ; r/(2+r) = u/2
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vmovsd xmm4,QWORD PTR __real_ca2
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vmovsd xmm5,QWORD PTR __real_ca4
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vmulsd xmm6,xmm0,xmm1 ; correction
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vaddsd xmm1,xmm1,xmm1 ; u
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vmulsd xmm2,xmm1,xmm1 ; u^2
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vfmadd213sd xmm4,xmm2,QWORD PTR __real_ca1
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vfmadd213sd xmm5,xmm2,QWORD PTR __real_ca3
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vmulsd xmm2,xmm2,xmm1 ; u^3
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vmulsd xmm4,xmm4,xmm2
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vmulsd xmm2,xmm2,xmm2
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vmulsd xmm2,xmm2,xmm1 ; u^7
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vmulsd xmm5,xmm5,xmm2
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vaddsd xmm4,xmm4,xmm5
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vsubsd xmm4,xmm4,xmm6
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vpand xmm3,xmm0,QWORD PTR __mask_lower
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vsubsd xmm0,xmm0,xmm3
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vaddsd xmm4,xmm4,xmm0
|
|
|
|
vmulsd xmm1,xmm4,QWORD PTR __real_log10_e_lead
|
|
vmulsd xmm4,xmm4,QWORD PTR __real_log10_e_tail
|
|
vmulsd xmm0,xmm3,QWORD PTR __real_log10_e_tail
|
|
vmulsd xmm3,xmm3,QWORD PTR __real_log10_e_lead
|
|
|
|
vaddsd xmm0,xmm0,xmm4
|
|
vaddsd xmm0,xmm0,xmm1
|
|
vaddsd xmm0,xmm0,xmm3
|
|
|
|
AVXRestoreXmm xmm6, save_xmm6
|
|
StackDeallocate stack_size
|
|
ret
|
|
|
|
|
|
Llog10_fma3_denormal_adjust:
|
|
vpor xmm2,xmm2,QWORD PTR __real_one
|
|
vsubsd xmm2,xmm2,QWORD PTR __real_one
|
|
vpsrlq xmm5,xmm2,52
|
|
vpand xmm2,xmm2,QWORD PTR __mask_mant
|
|
vmovapd xmm0,xmm2
|
|
vpsubd xmm5,xmm5,DWORD PTR __mask_2045
|
|
vcvtdq2pd xmm6,xmm5
|
|
jmp Llog10_fma3_continue_common
|
|
|
|
ALIGN 16
|
|
Llog10_fma3_x_is_zero_or_neg:
|
|
jne Llog10_fma3_x_is_neg
|
|
vmovsd xmm1,QWORD PTR __real_ninf
|
|
mov r8d,DWORD PTR __flag_x_zero
|
|
call fname_special
|
|
|
|
AVXRestoreXmm xmm6, save_xmm6
|
|
StackDeallocate stack_size
|
|
ret
|
|
|
|
|
|
ALIGN 16
|
|
Llog10_fma3_x_is_neg:
|
|
|
|
vmovsd xmm1,QWORD PTR __real_neg_qnan
|
|
mov r8d,DWORD PTR __flag_x_neg
|
|
call fname_special
|
|
|
|
AVXRestoreXmm xmm6, save_xmm6
|
|
StackDeallocate stack_size
|
|
ret
|
|
|
|
|
|
ALIGN 16
|
|
Llog10_fma3_x_is_inf_or_nan:
|
|
|
|
cmp rax,QWORD PTR __real_inf
|
|
je Llog10_fma3_finish
|
|
|
|
cmp rax,QWORD PTR __real_ninf
|
|
je Llog10_fma3_x_is_neg
|
|
|
|
or rax,QWORD PTR __real_qnanbit
|
|
movd xmm1,rax
|
|
mov r8d,DWORD PTR __flag_x_nan
|
|
call fname_special
|
|
jmp Llog10_fma3_finish
|
|
|
|
ALIGN 16
|
|
Llog10_fma3_finish:
|
|
|
|
AVXRestoreXmm xmm6, save_xmm6
|
|
StackDeallocate stack_size
|
|
ret
|
|
fname endp
|
|
|
|
END
|
|
|