lshift.asm
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上传日期:2022-08-06
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文件大小:2k
- dnl HP-PA mpn_lshift -- Shift a number left.
- dnl Optimized for the PA7100, where is runs at 3.25 cycles/limb.
- dnl Copyright 1992, 1994, 2000, 2001, 2002, 2003 Free Software Foundation,
- dnl Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C INPUT PARAMETERS
- C res_ptr r26
- C s_ptr r25
- C size r24
- C cnt r23
- ASM_START()
- PROLOGUE(mpn_lshift)
- sh2add %r24,%r25,%r25
- sh2add %r24,%r26,%r26
- ldws,mb -4(0,%r25),%r22
- subi 32,%r23,%r1
- mtsar %r1
- addib,= -1,%r24,L(0004)
- vshd %r0,%r22,%r28 C compute carry out limb
- ldws,mb -4(0,%r25),%r29
- addib,<= -5,%r24,L(rest)
- vshd %r22,%r29,%r20
- LDEF(loop)
- ldws,mb -4(0,%r25),%r22
- stws,mb %r20,-4(0,%r26)
- vshd %r29,%r22,%r20
- ldws,mb -4(0,%r25),%r29
- stws,mb %r20,-4(0,%r26)
- vshd %r22,%r29,%r20
- ldws,mb -4(0,%r25),%r22
- stws,mb %r20,-4(0,%r26)
- vshd %r29,%r22,%r20
- ldws,mb -4(0,%r25),%r29
- stws,mb %r20,-4(0,%r26)
- addib,> -4,%r24,L(loop)
- vshd %r22,%r29,%r20
- LDEF(rest)
- addib,= 4,%r24,L(end1)
- nop
- LDEF(eloop)
- ldws,mb -4(0,%r25),%r22
- stws,mb %r20,-4(0,%r26)
- addib,<= -1,%r24,L(end2)
- vshd %r29,%r22,%r20
- ldws,mb -4(0,%r25),%r29
- stws,mb %r20,-4(0,%r26)
- addib,> -1,%r24,L(eloop)
- vshd %r22,%r29,%r20
- LDEF(end1)
- stws,mb %r20,-4(0,%r26)
- vshd %r29,%r0,%r20
- bv 0(%r2)
- stw %r20,-4(0,%r26)
- LDEF(end2)
- stws,mb %r20,-4(0,%r26)
- LDEF(0004)
- vshd %r22,%r0,%r20
- bv 0(%r2)
- stw %r20,-4(0,%r26)
- EPILOGUE()