diff options
Diffstat (limited to 'rts/gmp/mpn/powerpc64/addsub_n.asm')
| -rw-r--r-- | rts/gmp/mpn/powerpc64/addsub_n.asm | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/rts/gmp/mpn/powerpc64/addsub_n.asm b/rts/gmp/mpn/powerpc64/addsub_n.asm new file mode 100644 index 0000000000..4ed40d71ae --- /dev/null +++ b/rts/gmp/mpn/powerpc64/addsub_n.asm @@ -0,0 +1,107 @@ +# PowerPC-64 mpn_addsub_n -- Simultaneous add and sub. + +# Copyright (C) 1999, 2000 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; see the file COPYING.LIB. If not, write to +# the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +# MA 02111-1307, USA. + + +# INPUT PARAMETERS +# res_ptr r3 +# s1_ptr r4 +# s2_ptr r5 +# size r6 + +include(`asm-syntax.m4') + +define(SAVE_BORROW_RESTORE_CARRY, + `sldi $1,$1,63 + adde $1,$1,$1') +define(SAVE_CARRY_RESTORE_BORROW, + `sldi $1,$1,63 + adde $1,$1,$1') + +# 19991117 + +# This is just crafted for testing some ideas, and verifying that we can make +# it run fast. It runs at 2.55 cycles/limb on the 630, which is very good. +# We should play a little with the schedule. No time has been spent on that. + +# To finish this, the loop warm up and cool down code needs to be written, +# and the result need to be tested. Also, the proper calling sequence should +# be used. + +# r1p r2p s1p s2p n +# Use reg r0, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12 + +ASM_START() +PROLOGUE(mpn_addsub_n) + std r14,-64(1) + std r15,-56(1) + std r16,-48(1) + std r17,-40(1) + std r18,-32(1) + std r19,-24(1) + + srdi r7,r7,2 + mtctr r7 # copy size into CTR + addic r0,r0,0 # clear cy + addi r3,r3,-8 # offset res_ptr, it's updated before it's used + addi r4,r4,-8 # offset res_ptr, it's updated before it's used + +.Loop: + adde r12,r8,r9 + std r12,8(r3) + adde r12,r10,r11 + std r12,16(r3) + + SAVE_CARRY_RESTORE_BORROW(r0) + + subfe r12,r8,r9 + std r12,8(r4) + ld r8,8(r5) # s1 L 1 + ld r9,8(r6) # s2 L 1 + subfe r12,r10,r11 + std r12,16(r4) + ld r10,16(r5) # s1 L 2 + ld r11,16(r6) # s2 L 2 +# pair ------------------------- + subfe r12,r14,r15 + std r12,24(r4) + subfe r12,r16,r17 + stdu r12,32(r4) + + SAVE_BORROW_RESTORE_CARRY(r0) + + adde r12,r14,r15 + std r12,24(r3) + ld r14,24(r5) # s1 L 3 + ld r15,24(r6) # s2 L 3 + adde r12,r16,r17 + stdu r12,32(r3) + ldu r16,32(r5) # s1 L 4 + ldu r17,32(r6) # s2 L 4 + bdnz .Loop + + ld r14,-64(1) + ld r15,-56(1) + ld r16,-48(1) + ld r17,-40(1) + ld r18,-32(1) + ld r19,-24(1) + blr +EPILOGUE(mpn_addsub_n) |