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b58ddff026
* merged mpfr 3.0.0 and gmp 5.0.1 in buildtools trunk git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@37378 a95241bf-73f2-0310-859d-f6bbb57e9c96
75 lines
1.7 KiB
NASM
75 lines
1.7 KiB
NASM
dnl PowerPC-64 mpn_com.
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dnl Copyright 2003, 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 The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 3 of the License, or (at
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dnl your option) any later version.
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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 Lesser General Public
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dnl License for more details.
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with the GNU MP Library. If not, see http://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: 1.6
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C TODO
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C * 8-way unrolling brings timing down to about 1.3 cycles/limb.
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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_com)
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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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addi r5, r5, 3 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, r0 C offset up
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add 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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L(L00): addi r4, r4, 32
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addi r3, r3, 32
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ALIGN(16)
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L(oop): ld r6, -32(r4)
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nor r6, r6, r6
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std r6, -32(r3)
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L(L11): ld r6, -24(r4)
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nor r6, r6, r6
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std r6, -24(r3)
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L(L10): ld r6, -16(r4)
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nor r6, r6, r6
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std r6, -16(r3)
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L(L01): ld r6, -8(r4)
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nor r6, r6, r6
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addi r4, r4, 32
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std r6, -8(r3)
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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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