| Index: gcc/gmp/mpn/powerpc32/mod_34lsub1.asm
|
| diff --git a/gcc/gmp/mpn/powerpc32/mod_34lsub1.asm b/gcc/gmp/mpn/powerpc32/mod_34lsub1.asm
|
| deleted file mode 100644
|
| index fa0f0139ee5067edeac70abb360cc199b1c82ecd..0000000000000000000000000000000000000000
|
| --- a/gcc/gmp/mpn/powerpc32/mod_34lsub1.asm
|
| +++ /dev/null
|
| @@ -1,134 +0,0 @@
|
| -dnl PowerPC-32 mpn_mod_34lsub1 -- mpn remainder mod 2^24-1.
|
| -
|
| -dnl Copyright 2002, 2003, 2005 Free Software Foundation, Inc.
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| -
|
| -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')
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| -
|
| -
|
| -C cycles/limb
|
| -C 603e: ?
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| -C 604e: 3
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| -C 75x (G3): 3
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| -C 7400,7410 (G4): 3
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| -C 744x,745x (G4+): 3
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| -C power4/ppc970: 2.5
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| -C power5: 2.5
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| -
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| -C mp_limb_t mpn_mod_34lsub1 (mp_srcptr src, mp_size_t size)
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| -C
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| -C There seems no need to schedule the loads back, the code is still 3.0 c/l
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| -C on 750/7400 no matter where they're placed.
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| -C
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| -C Alternatives:
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| -C
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| -C Fetching half words would allow add instead for accumulating, instead of
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| -C adde and its serialization. An outer loop would be required though, since
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| -C 2^16 halfwords can overflow. lhz+add would be 2.0 c/l, but if there's
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| -C also a bdz or bdnz for each and a pointer update say every three limbs
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| -C then the total would be 2.67 c/l which isn't much faster than the current
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| -C simpler code.
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| -
|
| -ASM_START()
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| -PROLOGUE(mpn_mod_34lsub1)
|
| -
|
| - C r3 src
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| - C r4 size
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| -
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| - mtctr r4
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| - addic r6, r3, 8 C &src[2], and clear CA
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| -
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| - lwz r3, 0(r3) C acc0 = src[0]
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| - bdz L(done)
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| -
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| - lwz r4, -4(r6) C acc1 = src[1]
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| - bdz L(two)
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| -
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| - lwz r5, 0(r6) C acc2 = src[2]
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| - lis r7, 0 C no carry if just three limbs
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| -
|
| - bdz L(three)
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| - lis r7, 1 C 0x10000 carry pos
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| -
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| -L(top):
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| - C r3 acc0
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| - C r4 acc1
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| - C r5 acc2
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| - C r6 src, incrementing
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| - C r7 carry pos
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| -
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| - lwz r0, 4(r6)
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| - adde r3, r3, r0
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| - bdz L(end0)
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| -
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| - lwz r0, 8(r6)
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| - adde r4, r4, r0
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| - bdz L(end1)
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| -
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| - lwzu r0, 12(r6)
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| - adde r5, r5, r0
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| - bdnz L(top)
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| -
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| -
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| - srwi r7, r7, 8
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| -L(end0):
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| - srwi r7, r7, 8
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| -L(end1):
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| - subfe r0, r0, r0 C -1 if not CA
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| -
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| - andc r7, r7, r0 C final carry, 0x10000, 0x100, 1 or 0
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| -L(three):
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| - rlwinm r6, r3, 0,8,31 C acc0 low
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| -
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| - add r7, r7, r6
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| - rlwinm r6, r3, 8,24,31 C acc0 high
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| -
|
| - add r7, r7, r6
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| - rlwinm r6, r4, 8,8,23 C acc1 low
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| -
|
| - add r7, r7, r6
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| - rlwinm r6, r4, 16,16,31 C acc1 high
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| -
|
| - add r7, r7, r6
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| - rlwinm r6, r5, 16,8,15 C acc2 low
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| -
|
| - add r7, r7, r6
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| - rlwinm r6, r5, 24,8,31 C acc2 high
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| -
|
| - add r3, r7, r6
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| -
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| -L(done):
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| - blr
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| -
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| -L(two):
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| - C r3 acc0
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| - C r4 acc1
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| -
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| - rlwinm r5, r3, 8,24,31 C acc0 high
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| - rlwinm r3, r3, 0,8,31 C acc0 low
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| -
|
| - add r3, r3, r5 C acc0 high + low
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| - rlwinm r5, r4, 16,16,31 C acc1 high
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| -
|
| - add r3, r3, r5 C add acc1 high
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| - rlwinm r5, r4, 8,8,23 C acc1 low
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| -
|
| - add r3, r3, r5 C add acc1 low
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| -
|
| - blr
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| -
|
| -EPILOGUE()
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|
|