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author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
commit | e64ac02c24b43659048622714afdc92fedf561fa (patch) | |
tree | 37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/hppa/hppa1.1/addmul_1.S | |
parent | a20c2b3c87aebc7d4b090c622d36480263b80042 (diff) | |
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Move all files into ports/ subdirectory in preparation for merge with glibcglibc-2.16-ports-before-merge
Diffstat (limited to 'ports/sysdeps/hppa/hppa1.1/addmul_1.S')
-rw-r--r-- | ports/sysdeps/hppa/hppa1.1/addmul_1.S | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/ports/sysdeps/hppa/hppa1.1/addmul_1.S b/ports/sysdeps/hppa/hppa1.1/addmul_1.S new file mode 100644 index 0000000000..ce1137bb99 --- /dev/null +++ b/ports/sysdeps/hppa/hppa1.1/addmul_1.S @@ -0,0 +1,103 @@ +;! HP-PA-1.1 __mpn_addmul_1 -- Multiply a limb vector with a limb and +;! add the result to a second limb vector. + +;! Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc. + +;! This file is part of the GNU MP Library. + +;! The GNU MP Library is free software; you can redistribute it and/or modify +;! it under the terms of the GNU Lesser General Public License as published by +;! the Free Software Foundation; either version 2.1 of the License, or (at your +;! option) any later version. + +;! The GNU MP Library is distributed in the hope that it will be useful, but +;! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +;! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public +;! License for more details. + +;! You should have received a copy of the GNU Lesser General Public License +;! along with the GNU MP Library. If not, see +;! <http://www.gnu.org/licenses/>. + + +;! INPUT PARAMETERS +;! res_ptr r26 +;! s1_ptr r25 +;! size r24 +;! s2_limb r23 + +;! This runs at 11 cycles/limb on a PA7000. With the used instructions, it +;! can not become faster due to data cache contention after a store. On the +;! PA7100 it runs at 10 cycles/limb, and that can not be improved either, +;! since only the xmpyu does not need the integer pipeline, so the only +;! dual-issue we will get are addc+xmpyu. Unrolling could gain a cycle/limb +;! on the PA7100. + +;! There are some ideas described in mul_1.s that applies to this code too. + + .text + .export __mpn_addmul_1 +__mpn_addmul_1: + .proc + .callinfo frame=64,no_calls + .entry + + ldo 64(%r30),%r30 + fldws,ma 4(%r25),%fr5 + stw %r23,-16(%r30) ;! move s2_limb ... + addib,= -1,%r24,L$just_one_limb + fldws -16(%r30),%fr4 ;! ... into fr4 + add %r0,%r0,%r0 ;! clear carry + xmpyu %fr4,%fr5,%fr6 + fldws,ma 4(%r25),%fr7 + fstds %fr6,-16(%r30) + xmpyu %fr4,%fr7,%fr8 + ldw -12(%r30),%r20 ;! least significant limb in product + ldw -16(%r30),%r28 + + fstds %fr8,-16(%r30) + addib,= -1,%r24,L$end + ldw -12(%r30),%r1 + +;! Main loop +L$loop: + ldws 0(%r26),%r29 + fldws,ma 4(%r25),%fr5 + add %r29,%r20,%r20 + stws,ma %r20,4(%r26) + addc %r28,%r1,%r20 + xmpyu %fr4,%fr5,%fr6 + ldw -16(%r30),%r28 + fstds %fr6,-16(%r30) + addc %r0,%r28,%r28 + addib,<> -1,%r24,L$loop + ldw -12(%r30),%r1 + +L$end: + ldw 0(%r26),%r29 + add %r29,%r20,%r20 + stws,ma %r20,4(%r26) + addc %r28,%r1,%r20 + ldw -16(%r30),%r28 + ldws 0(%r26),%r29 + addc %r0,%r28,%r28 + add %r29,%r20,%r20 + stws,ma %r20,4(%r26) + addc %r0,%r28,%r28 + bv 0(%r2) + ldo -64(%r30),%r30 + +L$just_one_limb: + xmpyu %fr4,%fr5,%fr6 + ldw 0(%r26),%r29 + fstds %fr6,-16(%r30) + ldw -12(%r30),%r1 + ldw -16(%r30),%r28 + add %r29,%r1,%r20 + stw %r20,0(%r26) + addc %r0,%r28,%r28 + bv 0(%r2) + ldo -64(%r30),%r30 + + .exit + .procend |