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dnl PowerPC-64 mpn_copyd
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dnl Copyright 2004, 2005 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C POWER3/PPC630 1
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C POWER4/PPC970 1
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C POWER5 ?
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C POWER6 ?
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C POWER7 1.4
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C INPUT PARAMETERS
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C rp r3
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C up r4
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C n r5
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ASM_START()
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PROLOGUE(mpn_copyd)
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rldic. r0, r5, 3, 59 C r0 = (r5 & 3) << 3; cr0 = (n == 4t)?
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cmpldi cr6, r0, 16 C cr6 = (n cmp 4t + 2)?
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ifdef(`HAVE_ABI_mode32',
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` rldic r6, r5, 3, 32', C byte count corresponding to n
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` rldicr r6, r5, 3, 60') C byte count corresponding to n
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addi r5, r5, 4 C compute...
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ifdef(`HAVE_ABI_mode32',
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` rldicl r5, r5, 62,34', C ...branch count
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` rldicl r5, r5, 62, 2') C ...branch count
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mtctr r5
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add r4, r4, r6
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add r3, r3, r6
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sub r4, r4, r0 C offset up
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sub r3, r3, r0 C offset rp
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beq cr0, L(L00)
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blt cr6, L(L01)
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beq cr6, L(L10)
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b L(L11)
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ALIGN(16)
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L(oop): ld r6, 24(r4)
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std r6, 24(r3)
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L(L11): ld r6, 16(r4)
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std r6, 16(r3)
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L(L10): ld r6, 8(r4)
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std r6, 8(r3)
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L(L01): ld r6, 0(r4)
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std r6, 0(r3)
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L(L00): addi r4, r4, -32
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addi r3, r3, -32
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bdnz L(oop)
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blr
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EPILOGUE()
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