1995-10-16 01:18:40 +00:00
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# MIPS2 __mpn_lshift --
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# Copyright (C) 1995 Free Software Foundation, Inc.
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# This file is part of the GNU MP Library.
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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 Library General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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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 Library General Public
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# License for more details.
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# You should have received a copy of the GNU Library General Public License
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# along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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1996-05-07 21:04:45 +00:00
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# the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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# MA 02111-1307, USA.
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1995-10-16 01:18:40 +00:00
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# INPUT PARAMETERS
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# res_ptr $4
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# src_ptr $5
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# size $6
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# cnt $7
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.text
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.align 2
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.globl __mpn_lshift
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.ent __mpn_lshift
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__mpn_lshift:
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.set noreorder
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.set nomacro
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sll $2,$6,2
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addu $5,$5,$2 # make r5 point at end of src
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lw $10,-4($5) # load first limb
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subu $13,$0,$7
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addu $4,$4,$2 # make r4 point at end of res
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addiu $6,$6,-1
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and $9,$6,4-1 # number of limbs in first loop
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beq $9,$0,.L0 # if multiple of 4 limbs, skip first loop
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srl $2,$10,$13 # compute function result
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subu $6,$6,$9
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.Loop0: lw $3,-8($5)
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addiu $4,$4,-4
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addiu $5,$5,-4
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addiu $9,$9,-1
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sll $11,$10,$7
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srl $12,$3,$13
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move $10,$3
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or $8,$11,$12
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bne $9,$0,.Loop0
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sw $8,0($4)
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.L0: beq $6,$0,.Lend
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nop
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.Loop: lw $3,-8($5)
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addiu $4,$4,-16
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addiu $6,$6,-4
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sll $11,$10,$7
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srl $12,$3,$13
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lw $10,-12($5)
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sll $14,$3,$7
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or $8,$11,$12
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sw $8,12($4)
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srl $9,$10,$13
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lw $3,-16($5)
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sll $11,$10,$7
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or $8,$14,$9
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sw $8,8($4)
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srl $12,$3,$13
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lw $10,-20($5)
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sll $14,$3,$7
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or $8,$11,$12
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sw $8,4($4)
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srl $9,$10,$13
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addiu $5,$5,-16
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or $8,$14,$9
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bgtz $6,.Loop
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sw $8,0($4)
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.Lend: sll $8,$10,$7
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j $31
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sw $8,-4($4)
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.end __mpn_lshift
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