X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2Fgmp%2Fmpn%2Fpowerpc32%2Fmul_1.asm;fp=rts%2Fgmp%2Fmpn%2Fpowerpc32%2Fmul_1.asm;h=ec878b54d57d4d6e0d03f64ae0894eb3ff54fac8;hb=0065d5ab628975892cea1ec7303f968c3338cbe1;hp=0000000000000000000000000000000000000000;hpb=28a464a75e14cece5db40f2765a29348273ff2d2;p=ghc-hetmet.git

diff --git a/rts/gmp/mpn/powerpc32/mul_1.asm b/rts/gmp/mpn/powerpc32/mul_1.asm
new file mode 100644
index 0000000..ec878b5
--- /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)