copyi.asm
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上传日期:2022-08-06
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- dnl PowerPC-64 mpn_copyi.
- dnl Copyright 2004, 2005 Free Software Foundation, 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 cycles/limb
- C POWER3/PPC630: 1
- C POWER4/PPC970: 1
- C INPUT PARAMETERS
- C rp r3
- C up r4
- C n r5
- ASM_START()
- PROLOGUE(mpn_copyi)
- rldic. r0, r5, 3, 59 C r0 = (r5 & 3) << 3; cr0 = (n == 4t)?
- cmpldi cr6, r0, 16 C cr6 = (n cmp 4t + 2)?
- addi r5, r5, 4 C compute...
- ifdef(`HAVE_ABI_mode32',
- ` rldicl r5, r5, 62,34', C ...branch count
- ` rldicl r5, r5, 62, 2') C ...branch count
- mtctr r5
- add r4, r4, r0 C offset up
- add r3, r3, r0 C offset rp
- beq cr0, L(L00)
- blt cr6, L(L01)
- beq cr6, L(L10)
- b L(L11)
- ALIGN(16)
- L(oop): ld r6, -32(r4)
- std r6, -32(r3)
- L(L11): ld r6, -24(r4)
- std r6, -24(r3)
- L(L10): ld r6, -16(r4)
- std r6, -16(r3)
- L(L01): ld r6, -8(r4)
- std r6, -8(r3)
- L(L00): addi r4, r4, 32
- addi r3, r3, 32
- bdnz L(oop)
- blr
- EPILOGUE()