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98 lines
1.9 KiB
ArmAsm
98 lines
1.9 KiB
ArmAsm
/* MIPS2 __mpn_lshift --
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Copyright (C) 1995-2020 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 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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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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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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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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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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*/
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#ifdef __PIC__
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.option pic2
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#endif
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ENTRY (__mpn_lshift)
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.set noreorder
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#ifdef __PIC__
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.cpload t9
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#endif
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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,L(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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L(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,L(Loop0)
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sw $8,0($4)
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L(L0): beq $6,$0,L(Lend)
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nop
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L(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,L(Loop)
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sw $8,0($4)
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L(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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