glibc/sysdeps/mips/mips64/mul_1.S

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/* MIPS3 __mpn_mul_1 -- Multiply a limb vector with a single limb and
* store the product in a second limb vector.
*
* Copyright (C) 1992-2020 Free Software Foundation, Inc.
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*
* This file is part of the GNU MP Library.
*
* The GNU MP Library is free software; you can redistribute it and/or modify
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* 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
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* option) any later version.
*
* The GNU MP Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the GNU MP Library. If not, see
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
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* <https://www.gnu.org/licenses/>.
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*/
#include <sysdep.h>
#include <sys/asm.h>
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/* INPUT PARAMETERS
* res_ptr $4
* s1_ptr $5
* size $6
* s2_limb $7
*/
#ifdef __PIC__
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.option pic2
#endif
ENTRY (__mpn_mul_1)
#ifdef __PIC__
SETUP_GP /* ??? unused */
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#endif
.set noreorder
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.set nomacro
# warm up phase 0
ld $8,0($5)
# warm up phase 1
daddiu $5,$5,8
#if __mips_isa_rev < 6
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dmultu $8,$7
#else
dmulu $11,$8,$7
dmuhu $12,$8,$7
#endif
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daddiu $6,$6,-1
beq $6,$0,L(LC0)
move $2,$0 # zero cy2
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daddiu $6,$6,-1
beq $6,$0,L(LC1)
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ld $8,0($5) # load new s1 limb as early as possible
#if __mips_isa_rev < 6
L(Loop): mflo $10
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mfhi $9
#else
L(Loop): move $10,$11
move $9,$12
#endif
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daddiu $5,$5,8
daddu $10,$10,$2 # add old carry limb to low product limb
#if __mips_isa_rev < 6
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dmultu $8,$7
#else
dmulu $11,$8,$7
dmuhu $12,$8,$7
#endif
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ld $8,0($5) # load new s1 limb as early as possible
daddiu $6,$6,-1 # decrement loop counter
sltu $2,$10,$2 # carry from previous addition -> $2
sd $10,0($4)
daddiu $4,$4,8
bne $6,$0,L(Loop)
daddu $2,$9,$2 # add high product limb and carry from addition
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# cool down phase 1
#if __mips_isa_rev < 6
L(LC1): mflo $10
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mfhi $9
#else
L(LC1): move $10,$11
move $9,$12
#endif
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daddu $10,$10,$2
sltu $2,$10,$2
#if __mips_isa_rev < 6
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dmultu $8,$7
#else
dmulu $11,$8,$7
dmuhu $12,$8,$7
#endif
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sd $10,0($4)
daddiu $4,$4,8
daddu $2,$9,$2 # add high product limb and carry from addition
# cool down phase 0
#if __mips_isa_rev < 6
L(LC0): mflo $10
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mfhi $9
#else
L(LC0): move $10,$11
move $9,$12
#endif
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daddu $10,$10,$2
sltu $2,$10,$2
sd $10,0($4)
j $31
daddu $2,$9,$2 # add high product limb and carry from addition
END (__mpn_mul_1)