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2ad7600be7
I've moved the MIPS port from ports to the main sysdeps hierarchy. Beyond the README update, the move of the files was simply git mv ports/sysdeps/mips sysdeps/mips git mv ports/sysdeps/unix/mips sysdeps/unix/mips git mv ports/sysdeps/unix/sysv/linux/mips sysdeps/unix/sysv/linux/mips and in addition to the ChangeLog entries here, I put a note at the top of ports/ChangeLog.mips similar to those in other files. Tested that disassembly of installed shared libraries for mips is the same before and after this patch (except for ld.so where paths in assertions are involved, as for arm). * sysdeps/mips: Move directory from ports/sysdeps/mips. * sysdeps/unix/mips: Move directory from ports/sysdeps/unix/mips. * sysdeps/unix/sysv/linux/mips: Move directory from ports/sysdeps/unix/sysv/linux/mips. * README: Update listing for mips-*-linux-gnu and mips64-*-linux-gnu. * sysdeps/mips: Move directory to ../sysdeps/mips. * sysdeps/unix/mips: Move directory to ../sysdeps/unix/mips. * sysdeps/unix/sysv/linux/mips: Move directory to ../sysdeps/unix/sysv/linux/mips.
103 lines
2.3 KiB
ArmAsm
103 lines
2.3 KiB
ArmAsm
/* MIPS3 __mpn_submul_1 -- Multiply a limb vector with a single limb and
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* subtract the product from a second limb vector.
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*
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* Copyright (C) 1992-2014 Free Software Foundation, Inc.
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*
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* This file is part of the GNU MP Library.
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*
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* 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
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* The GNU MP Library is distributed in the hope that it will be useful, but
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* 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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*
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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
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* <http://www.gnu.org/licenses/>.
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*/
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#include <sysdep.h>
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#include <sys/asm.h>
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/* INPUT PARAMETERS
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* res_ptr $4
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* s1_ptr $5
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* size $6
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* s2_limb $7
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*/
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#ifdef __PIC__
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.option pic2
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#endif
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ENTRY (__mpn_submul_1)
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#ifdef __PIC__
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SETUP_GP /* ??? unused */
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#endif
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.set noreorder
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.set nomacro
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# warm up phase 0
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ld $8,0($5)
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# warm up phase 1
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daddiu $5,$5,8
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dmultu $8,$7
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daddiu $6,$6,-1
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beq $6,$0,L(LC0)
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move $2,$0 # zero cy2
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daddiu $6,$6,-1
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beq $6,$0,L(LC1)
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ld $8,0($5) # load new s1 limb as early as possible
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L(Loop): ld $10,0($4)
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mflo $3
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mfhi $9
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daddiu $5,$5,8
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daddu $3,$3,$2 # add old carry limb to low product limb
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dmultu $8,$7
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ld $8,0($5) # load new s1 limb as early as possible
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daddiu $6,$6,-1 # decrement loop counter
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sltu $2,$3,$2 # carry from previous addition -> $2
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dsubu $3,$10,$3
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sgtu $10,$3,$10
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daddu $2,$2,$10
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sd $3,0($4)
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daddiu $4,$4,8
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bne $6,$0,L(Loop)
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daddu $2,$9,$2 # add high product limb and carry from addition
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# cool down phase 1
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L(LC1): ld $10,0($4)
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mflo $3
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mfhi $9
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daddu $3,$3,$2
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sltu $2,$3,$2
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dmultu $8,$7
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dsubu $3,$10,$3
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sgtu $10,$3,$10
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daddu $2,$2,$10
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sd $3,0($4)
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daddiu $4,$4,8
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daddu $2,$9,$2 # add high product limb and carry from addition
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# cool down phase 0
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L(LC0): ld $10,0($4)
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mflo $3
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mfhi $9
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daddu $3,$3,$2
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sltu $2,$3,$2
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dsubu $3,$10,$3
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sgtu $10,$3,$10
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daddu $2,$2,$10
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sd $3,0($4)
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j $31
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daddu $2,$9,$2 # add high product limb and carry from addition
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END (__mpn_submul_1)
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