diff options
Diffstat (limited to 'rts/gmp/mpn/powerpc32/mul_1.asm')
| -rw-r--r-- | rts/gmp/mpn/powerpc32/mul_1.asm | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/rts/gmp/mpn/powerpc32/mul_1.asm b/rts/gmp/mpn/powerpc32/mul_1.asm new file mode 100644 index 0000000000..ec878b54d5 --- /dev/null +++ b/rts/gmp/mpn/powerpc32/mul_1.asm @@ -0,0 +1,86 @@ +dnl PowerPC-32 mpn_mul_1 -- Multiply a limb vector with a limb and store +dnl the result in a second limb vector. + +dnl Copyright (C) 1995, 1997, 2000 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 by +dnl the Free Software Foundation; either version 2.1 of the License, or (at your +dnl 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; see the file COPYING.LIB. If not, write to +dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +dnl MA 02111-1307, USA. + + +dnl INPUT PARAMETERS +dnl res_ptr r3 +dnl s1_ptr r4 +dnl size r5 +dnl s2_limb r6 + +dnl This is optimized for the PPC604 but it runs decently even on PPC601. It +dnl has not been tested on a PPC603 since I don't have access to any such +dnl machines. + +include(`../config.m4') + +ASM_START() +PROLOGUE(mpn_mul_1) + mtctr r5 + addi r3,r3,-4 C adjust res_ptr, it's offset before it's used + li r12,0 C clear upper product reg + addic r0,r0,0 C clear cy +C Start software pipeline + lwz r8,0(r4) + bdz .Lend3 + stmw r30,-8(r1) C save registers we are supposed to preserve + lwzu r9,4(r4) + mullw r11,r8,r6 + mulhwu r0,r8,r6 + bdz .Lend1 +C Software pipelined main loop +.Loop: lwz r8,4(r4) + mullw r10,r9,r6 + adde r30,r11,r12 + mulhwu r12,r9,r6 + stw r30,4(r3) + bdz .Lend2 + lwzu r9,8(r4) + mullw r11,r8,r6 + adde r31,r10,r0 + mulhwu r0,r8,r6 + stwu r31,8(r3) + bdnz .Loop +C Finish software pipeline +.Lend1: mullw r10,r9,r6 + adde r30,r11,r12 + mulhwu r12,r9,r6 + stw r30,4(r3) + adde r31,r10,r0 + stwu r31,8(r3) + addze r3,r12 + lmw r30,-8(r1) C restore registers from stack + blr +.Lend2: mullw r11,r8,r6 + adde r31,r10,r0 + mulhwu r0,r8,r6 + stwu r31,8(r3) + adde r30,r11,r12 + stw r30,4(r3) + addze r3,r0 + lmw r30,-8(r1) C restore registers from stack + blr +.Lend3: mullw r11,r8,r6 + stw r11,4(r3) + mulhwu r3,r8,r6 + blr +EPILOGUE(mpn_mul_1) |