/*
* Copyright ( c ) 2016 , 2021 , Intel Corporation . All rights reserved .
* Copyright ( C ) 2021 THL A29 Limited , a Tencent company . All rights reserved .
* Intel Math Library ( LIBM ) Source Code
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code 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 General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*
*/
#include "precompiled.hpp"
#include "asm/assembler.hpp"
#include "asm/assembler.inline.hpp"
#include "macroAssembler_x86.hpp"
#include "runtime/stubRoutines.hpp"
#include "utilities/globalDefinitions.hpp"
/******************************************************************************/
// ALGORITHM DESCRIPTION - EXP()
// ---------------------
//
// Description:
// Let K = 64 (table size).
// x x/log(2) n
// e = 2 = 2 * T[j] * (1 + P(y))
// where
// x = m*log(2)/K + y, y in [-log(2)/K..log(2)/K]
// m = n*K + j, m,n,j - signed integer, j in [-K/2..K/2]
// j/K
// values of 2 are tabulated as T[j] = T_hi[j] ( 1 + T_lo[j]).
//
// P(y) is a minimax polynomial approximation of exp(x)-1
// on small interval [-log(2)/K..log(2)/K] (were calculated by Maple V).
//
// To avoid problems with arithmetic overflow and underflow,
// n n1 n2
// value of 2 is safely computed as 2 * 2 where n1 in [-BIAS/2..BIAS/2]
// where BIAS is a value of exponent bias.
//
// Special cases:
// exp(NaN) = NaN
// exp(+INF) = +INF
// exp(-INF) = 0
// exp(x) = 1 for subnormals
// for finite argument, only exp(0)=1 is exact
// For IEEE double
// if x > 709.782712893383973096 then exp(x) overflow
// if x < -745.133219101941108420 then exp(x) underflow
//
/******************************************************************************/
// The 32 bit code is at most SSE2 compliant
ATTRIBUTE_ALIGNED(16 ) juint _static_const_table[] =
{
0 x00000000UL, 0 xfff00000UL, 0 x00000000UL, 0 xfff00000UL, 0 xffffffc0UL,
0 x00000000UL, 0 xffffffc0UL, 0 x00000000UL, 0 x0000ffc0UL, 0 x00000000UL,
0 x0000ffc0UL, 0 x00000000UL, 0 x00000000UL, 0 x43380000UL, 0 x00000000UL,
0 x43380000UL, 0 x652b82feUL, 0 x40571547UL, 0 x652b82feUL, 0 x40571547UL,
0 xfefa0000UL, 0 x3f862e42UL, 0 xfefa0000UL, 0 x3f862e42UL, 0 xbc9e3b3aUL,
0 x3d1cf79aUL, 0 xbc9e3b3aUL, 0 x3d1cf79aUL, 0 xfffffffeUL, 0 x3fdfffffUL,
0 xfffffffeUL, 0 x3fdfffffUL, 0 xe3289860UL, 0 x3f56c15cUL, 0 x555b9e25UL,
0 x3fa55555UL, 0 xc090cf0fUL, 0 x3f811115UL, 0 x55548ba1UL, 0 x3fc55555UL,
0 x00000000UL, 0 x00000000UL, 0 x00000000UL, 0 x00000000UL, 0 x0e03754dUL,
0 x3cad7bbfUL, 0 x3e778060UL, 0 x00002c9aUL, 0 x3567f613UL, 0 x3c8cd252UL,
0 xd3158574UL, 0 x000059b0UL, 0 x61e6c861UL, 0 x3c60f74eUL, 0 x18759bc8UL,
0 x00008745UL, 0 x5d837b6cUL, 0 x3c979aa6UL, 0 x6cf9890fUL, 0 x0000b558UL,
0 x702f9cd1UL, 0 x3c3ebe3dUL, 0 x32d3d1a2UL, 0 x0000e3ecUL, 0 x1e63bcd8UL,
0 x3ca3516eUL, 0 xd0125b50UL, 0 x00011301UL, 0 x26f0387bUL, 0 x3ca4c554UL,
0 xaea92ddfUL, 0 x0001429aUL, 0 x62523fb6UL, 0 x3ca95153UL, 0 x3c7d517aUL,
0 x000172b8UL, 0 x3f1353bfUL, 0 x3c8b898cUL, 0 xeb6fcb75UL, 0 x0001a35bUL,
0 x3e3a2f5fUL, 0 x3c9aecf7UL, 0 x3168b9aaUL, 0 x0001d487UL, 0 x44a6c38dUL,
0 x3c8a6f41UL, 0 x88628cd6UL, 0 x0002063bUL, 0 xe3a8a894UL, 0 x3c968efdUL,
0 x6e756238UL, 0 x0002387aUL, 0 x981fe7f2UL, 0 x3c80472bUL, 0 x65e27cddUL,
0 x00026b45UL, 0 x6d09ab31UL, 0 x3c82f7e1UL, 0 xf51fdee1UL, 0 x00029e9dUL,
0 x720c0ab3UL, 0 x3c8b3782UL, 0 xa6e4030bUL, 0 x0002d285UL, 0 x4db0abb6UL,
0 x3c834d75UL, 0 x0a31b715UL, 0 x000306feUL, 0 x5dd3f84aUL, 0 x3c8fdd39UL,
0 xb26416ffUL, 0 x00033c08UL, 0 xcc187d29UL, 0 x3ca12f8cUL, 0 x373aa9caUL,
0 x000371a7UL, 0 x738b5e8bUL, 0 x3ca7d229UL, 0 x34e59ff6UL, 0 x0003a7dbUL,
0 xa72a4c6dUL, 0 x3c859f48UL, 0 x4c123422UL, 0 x0003dea6UL, 0 x259d9205UL,
0 x3ca8b846UL, 0 x21f72e29UL, 0 x0004160aUL, 0 x60c2ac12UL, 0 x3c4363edUL,
0 x6061892dUL, 0 x00044e08UL, 0 xdaa10379UL, 0 x3c6ecce1UL, 0 xb5c13cd0UL,
0 x000486a2UL, 0 xbb7aafb0UL, 0 x3c7690ceUL, 0 xd5362a27UL, 0 x0004bfdaUL,
0 x9b282a09UL, 0 x3ca083ccUL, 0 x769d2ca6UL, 0 x0004f9b2UL, 0 xc1aae707UL,
0 x3ca509b0UL, 0 x569d4f81UL, 0 x0005342bUL, 0 x18fdd78eUL, 0 x3c933505UL,
0 x36b527daUL, 0 x00056f47UL, 0 xe21c5409UL, 0 x3c9063e1UL, 0 xdd485429UL,
0 x0005ab07UL, 0 x2b64c035UL, 0 x3c9432e6UL, 0 x15ad2148UL, 0 x0005e76fUL,
0 x99f08c0aUL, 0 x3ca01284UL, 0 xb03a5584UL, 0 x0006247eUL, 0 x0073dc06UL,
0 x3c99f087UL, 0 x82552224UL, 0 x00066238UL, 0 x0da05571UL, 0 x3c998d4dUL,
0 x667f3bccUL, 0 x0006a09eUL, 0 x86ce4786UL, 0 x3ca52bb9UL, 0 x3c651a2eUL,
0 x0006dfb2UL, 0 x206f0dabUL, 0 x3ca32092UL, 0 xe8ec5f73UL, 0 x00071f75UL,
0 x8e17a7a6UL, 0 x3ca06122UL, 0 x564267c8UL, 0 x00075febUL, 0 x461e9f86UL,
0 x3ca244acUL, 0 x73eb0186UL, 0 x0007a114UL, 0 xabd66c55UL, 0 x3c65ebe1UL,
0 x36cf4e62UL, 0 x0007e2f3UL, 0 xbbff67d0UL, 0 x3c96fe9fUL, 0 x994cce12UL,
0 x00082589UL, 0 x14c801dfUL, 0 x3c951f14UL, 0 x9b4492ecUL, 0 x000868d9UL,
0 xc1f0eab4UL, 0 x3c8db72fUL, 0 x422aa0dbUL, 0 x0008ace5UL, 0 x59f35f44UL,
0 x3c7bf683UL, 0 x99157736UL, 0 x0008f1aeUL, 0 x9c06283cUL, 0 x3ca360baUL,
0 xb0cdc5e4UL, 0 x00093737UL, 0 x20f962aaUL, 0 x3c95e8d1UL, 0 x9fde4e4fUL,
0 x00097d82UL, 0 x2b91ce27UL, 0 x3c71affcUL, 0 x82a3f090UL, 0 x0009c491UL,
0 x589a2ebdUL, 0 x3c9b6d34UL, 0 x7b5de564UL, 0 x000a0c66UL, 0 x9ab89880UL,
0 x3c95277cUL, 0 xb23e255cUL, 0 x000a5503UL, 0 x6e735ab3UL, 0 x3c846984UL,
0 x5579fdbfUL, 0 x000a9e6bUL, 0 x92cb3387UL, 0 x3c8c1a77UL, 0 x995ad3adUL,
0 x000ae89fUL, 0 xdc2d1d96UL, 0 x3ca22466UL, 0 xb84f15faUL, 0 x000b33a2UL,
0 xb19505aeUL, 0 x3ca1112eUL, 0 xf2fb5e46UL, 0 x000b7f76UL, 0 x0a5fddcdUL,
0 x3c74ffd7UL, 0 x904bc1d2UL, 0 x000bcc1eUL, 0 x30af0cb3UL, 0 x3c736eaeUL,
0 xdd85529cUL, 0 x000c199bUL, 0 xd10959acUL, 0 x3c84e08fUL, 0 x2e57d14bUL,
0 x000c67f1UL, 0 x6c921968UL, 0 x3c676b2cUL, 0 xdcef9069UL, 0 x000cb720UL,
0 x36df99b3UL, 0 x3c937009UL, 0 x4a07897bUL, 0 x000d072dUL, 0 xa63d07a7UL,
0 x3c74a385UL, 0 xdcfba487UL, 0 x000d5818UL, 0 xd5c192acUL, 0 x3c8e5a50UL,
0 x03db3285UL, 0 x000da9e6UL, 0 x1c4a9792UL, 0 x3c98bb73UL, 0 x337b9b5eUL,
0 x000dfc97UL, 0 x603a88d3UL, 0 x3c74b604UL, 0 xe78b3ff6UL, 0 x000e502eUL,
0 x92094926UL, 0 x3c916f27UL, 0 xa2a490d9UL, 0 x000ea4afUL, 0 x41aa2008UL,
0 x3c8ec3bcUL, 0 xee615a27UL, 0 x000efa1bUL, 0 x31d185eeUL, 0 x3c8a64a9UL,
0 x5b6e4540UL, 0 x000f5076UL, 0 x4d91cd9dUL, 0 x3c77893bUL, 0 x819e90d8UL,
0 x000fa7c1UL, 0 x00000000UL, 0 x3ff00000UL, 0 x00000000UL, 0 x7ff00000UL,
0 x00000000UL, 0 x00000000UL, 0 xffffffffUL, 0 x7fefffffUL, 0 x00000000UL,
0 x00100000UL
};
//registers,
// input: (rbp + 8)
// scratch: xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
// rax, rdx, rcx, rbx (tmp)
// Code generated by Intel C compiler for LIBM library
void MacroAssembler::fast_exp(XMMRegister xmm0, XMMRegister xmm1, XMMRegister xmm2, XMMRegister xmm3,
XMMRegister xmm4, XMMRegister xmm5, XMMRegister xmm6, XMMRegister xmm7,
Register eax, Register ecx, Register edx, Register tmp) {
Label L_2TAG_PACKET_0_0_2, L_2TAG_PACKET_1_0_2, L_2TAG_PACKET_2_0_2, L_2TAG_PACKET_3_0_2;
Label L_2TAG_PACKET_4_0_2, L_2TAG_PACKET_5_0_2, L_2TAG_PACKET_6_0_2, L_2TAG_PACKET_7_0_2;
Label L_2TAG_PACKET_8_0_2, L_2TAG_PACKET_9_0_2, L_2TAG_PACKET_10_0_2, L_2TAG_PACKET_11_0_2;
Label L_2TAG_PACKET_12_0_2;
assert_different_registers(tmp, eax, ecx, edx);
address static_const_table = (address)_static_const_table;
subl(rsp, 120 );
movl(Address(rsp, 64 ), tmp);
lea(tmp, ExternalAddress(static_const_table));
movsd(xmm0, Address(rsp, 128 ));
unpcklpd(xmm0, xmm0);
movdqu(xmm1, Address(tmp, 64 )); // 0x652b82feUL, 0x40571547UL, 0x652b82feUL, 0x40571547UL
movdqu(xmm6, Address(tmp, 48 )); // 0x00000000UL, 0x43380000UL, 0x00000000UL, 0x43380000UL
movdqu(xmm2, Address(tmp, 80 )); // 0xfefa0000UL, 0x3f862e42UL, 0xfefa0000UL, 0x3f862e42UL
movdqu(xmm3, Address(tmp, 96 )); // 0xbc9e3b3aUL, 0x3d1cf79aUL, 0xbc9e3b3aUL, 0x3d1cf79aUL
pextrw(eax, xmm0, 3 );
andl(eax, 32767 );
movl(edx, 16527 );
subl(edx, eax);
subl(eax, 15504 );
orl(edx, eax);
cmpl(edx, INT_MIN);
jcc(Assembler::aboveEqual, L_2TAG_PACKET_0_0_2);
mulpd(xmm1, xmm0);
addpd(xmm1, xmm6);
movapd(xmm7, xmm1);
subpd(xmm1, xmm6);
mulpd(xmm2, xmm1);
movdqu(xmm4, Address(tmp, 128 )); // 0xe3289860UL, 0x3f56c15cUL, 0x555b9e25UL, 0x3fa55555UL
mulpd(xmm3, xmm1);
movdqu(xmm5, Address(tmp, 144 )); // 0xc090cf0fUL, 0x3f811115UL, 0x55548ba1UL, 0x3fc55555UL
subpd(xmm0, xmm2);
movdl(eax, xmm7);
movl(ecx, eax);
andl(ecx, 63 );
shll(ecx, 4 );
sarl(eax, 6 );
movl(edx, eax);
movdqu(xmm6, Address(tmp, 16 )); // 0xffffffc0UL, 0x00000000UL, 0xffffffc0UL, 0x00000000UL
pand(xmm7, xmm6);
movdqu(xmm6, Address(tmp, 32 )); // 0x0000ffc0UL, 0x00000000UL, 0x0000ffc0UL, 0x00000000UL
paddq(xmm7, xmm6);
psllq(xmm7, 46 );
subpd(xmm0, xmm3);
movdqu(xmm2, Address(tmp, ecx, Address::times_1, 160 ));
mulpd(xmm4, xmm0);
movapd(xmm6, xmm0);
movapd(xmm1, xmm0);
mulpd(xmm6, xmm6);
mulpd(xmm0, xmm6);
addpd(xmm5, xmm4);
mulsd(xmm0, xmm6);
mulpd(xmm6, Address(tmp, 112 )); // 0xfffffffeUL, 0x3fdfffffUL, 0xfffffffeUL, 0x3fdfffffUL
addsd(xmm1, xmm2);
unpckhpd(xmm2, xmm2);
mulpd(xmm0, xmm5);
addsd(xmm1, xmm0);
por(xmm2, xmm7);
unpckhpd(xmm0, xmm0);
addsd(xmm0, xmm1);
addsd(xmm0, xmm6);
addl(edx, 894 );
cmpl(edx, 1916 );
jcc(Assembler::above, L_2TAG_PACKET_1_0_2);
mulsd(xmm0, xmm2);
addsd(xmm0, xmm2);
jmp(L_2TAG_PACKET_2_0_2);
bind(L_2TAG_PACKET_1_0_2);
fnstcw(Address(rsp, 24 ));
movzwl(edx, Address(rsp, 24 ));
orl(edx, 768 );
movw(Address(rsp, 28 ), edx);
fldcw(Address(rsp, 28 ));
movl(edx, eax);
sarl(eax, 1 );
subl(edx, eax);
movdqu(xmm6, Address(tmp, 0 )); // 0x00000000UL, 0xfff00000UL, 0x00000000UL, 0xfff00000UL
pandn(xmm6, xmm2);
addl(eax, 1023 );
movdl(xmm3, eax);
psllq(xmm3, 52 );
por(xmm6, xmm3);
addl(edx, 1023 );
movdl(xmm4, edx);
psllq(xmm4, 52 );
movsd(Address(rsp, 8 ), xmm0);
fld_d(Address(rsp, 8 ));
movsd(Address(rsp, 16 ), xmm6);
fld_d(Address(rsp, 16 ));
fmula(1 );
faddp(1 );
movsd(Address(rsp, 8 ), xmm4);
fld_d(Address(rsp, 8 ));
fmulp(1 );
fstp_d(Address(rsp, 8 ));
movsd(xmm0, Address(rsp, 8 ));
fldcw(Address(rsp, 24 ));
pextrw(ecx, xmm0, 3 );
andl(ecx, 32752 );
cmpl(ecx, 32752 );
jcc(Assembler::aboveEqual, L_2TAG_PACKET_3_0_2);
cmpl(ecx, 0 );
jcc(Assembler::equal, L_2TAG_PACKET_4_0_2);
jmp(L_2TAG_PACKET_2_0_2);
cmpl(ecx, INT_MIN);
jcc(Assembler::below, L_2TAG_PACKET_3_0_2);
cmpl(ecx, -1064950997 );
jcc(Assembler::below, L_2TAG_PACKET_2_0_2);
jcc(Assembler::above, L_2TAG_PACKET_4_0_2);
movl(edx, Address(rsp, 128 ));
cmpl(edx, -17155601 );
jcc(Assembler::below, L_2TAG_PACKET_2_0_2);
jmp(L_2TAG_PACKET_4_0_2);
bind(L_2TAG_PACKET_3_0_2);
movl(edx, 14 );
jmp(L_2TAG_PACKET_5_0_2);
bind(L_2TAG_PACKET_4_0_2);
movl(edx, 15 );
bind(L_2TAG_PACKET_5_0_2);
movsd(Address(rsp, 0 ), xmm0);
movsd(xmm0, Address(rsp, 128 ));
fld_d(Address(rsp, 0 ));
jmp(L_2TAG_PACKET_6_0_2);
bind(L_2TAG_PACKET_7_0_2);
cmpl(eax, 2146435072 );
jcc(Assembler::aboveEqual, L_2TAG_PACKET_8_0_2);
movl(eax, Address(rsp, 132 ));
cmpl(eax, INT_MIN);
jcc(Assembler::aboveEqual, L_2TAG_PACKET_9_0_2);
movsd(xmm0, Address(tmp, 1208 )); // 0xffffffffUL, 0x7fefffffUL
mulsd(xmm0, xmm0);
movl(edx, 14 );
jmp(L_2TAG_PACKET_5_0_2);
bind(L_2TAG_PACKET_9_0_2);
movsd(xmm0, Address(tmp, 1216 ));
mulsd(xmm0, xmm0);
movl(edx, 15 );
jmp(L_2TAG_PACKET_5_0_2);
bind(L_2TAG_PACKET_8_0_2);
movl(edx, Address(rsp, 128 ));
cmpl(eax, 2146435072 );
jcc(Assembler::above, L_2TAG_PACKET_10_0_2);
cmpl(edx, 0 );
jcc(Assembler::notEqual, L_2TAG_PACKET_10_0_2);
movl(eax, Address(rsp, 132 ));
cmpl(eax, 2146435072 );
jcc(Assembler::notEqual, L_2TAG_PACKET_11_0_2);
movsd(xmm0, Address(tmp, 1192 )); // 0x00000000UL, 0x7ff00000UL
jmp(L_2TAG_PACKET_2_0_2);
bind(L_2TAG_PACKET_11_0_2);
movsd(xmm0, Address(tmp, 1200 )); // 0x00000000UL, 0x00000000UL
jmp(L_2TAG_PACKET_2_0_2);
bind(L_2TAG_PACKET_10_0_2);
movsd(xmm0, Address(rsp, 128 ));
addsd(xmm0, xmm0);
jmp(L_2TAG_PACKET_2_0_2);
bind(L_2TAG_PACKET_0_0_2);
movl(eax, Address(rsp, 132 ));
andl(eax, 2147483647 );
cmpl(eax, 1083179008 );
jcc(Assembler::aboveEqual, L_2TAG_PACKET_7_0_2);
movsd(xmm0, Address(rsp, 128 ));
addsd(xmm0, Address(tmp, 1184 )); // 0x00000000UL, 0x3ff00000UL
jmp(L_2TAG_PACKET_2_0_2);
bind(L_2TAG_PACKET_2_0_2);
movsd(Address(rsp, 48 ), xmm0);
fld_d(Address(rsp, 48 ));
bind(L_2TAG_PACKET_6_0_2);
movl(tmp, Address(rsp, 64 ));
}
Messung V0.5 in Prozent C=92 H=99 G=95
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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