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