From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001
From: Duncan Wilkie <antigravityd@gmail.com>
Date: Sat, 18 Nov 2023 06:11:09 -0600
Subject: Initial commit.

---
 gmp-6.3.0/mpn/powerpc64/mode64/p9/mul_1.asm | 126 ++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/powerpc64/mode64/p9/mul_1.asm

(limited to 'gmp-6.3.0/mpn/powerpc64/mode64/p9/mul_1.asm')

diff --git a/gmp-6.3.0/mpn/powerpc64/mode64/p9/mul_1.asm b/gmp-6.3.0/mpn/powerpc64/mode64/p9/mul_1.asm
new file mode 100644
index 0000000..363f095
--- /dev/null
+++ b/gmp-6.3.0/mpn/powerpc64/mode64/p9/mul_1.asm
@@ -0,0 +1,126 @@
+dnl  Power9 mpn_mul_1.
+
+dnl  Copyright 2017, 2018 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+dnl
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of either:
+dnl
+dnl    * the GNU Lesser General Public License as published by the Free
+dnl      Software Foundation; either version 3 of the License, or (at your
+dnl      option) any later version.
+dnl
+dnl  or
+dnl
+dnl    * the GNU General Public License as published by the Free Software
+dnl      Foundation; either version 2 of the License, or (at your option) any
+dnl      later version.
+dnl
+dnl  or both in parallel, as here.
+dnl
+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 General Public License
+dnl  for more details.
+dnl
+dnl  You should have received copies of the GNU General Public License and the
+dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
+dnl  see https://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C                   cycles/limb
+C POWER3/PPC630		 ?
+C POWER4/PPC970		 ?
+C POWER5		 ?
+C POWER6		 ?
+C POWER7		 ?
+C POWER8		 ?
+C POWER9		 2.47
+
+C TODO
+C  * Schedule for Power9 pipeline.
+C  * Unroll 4x if that proves beneficial.
+C  * This is marginally faster (but much smaller) than ../mul_1.asm.
+
+C INPUT PARAMETERS
+define(`rp', `r3')
+define(`up', `r4')
+define(`n',  `r5')
+define(`v0', `r6')
+
+ASM_START()
+PROLOGUE(mpn_mul_1c)
+	b	L(ent)
+EPILOGUE()
+PROLOGUE(mpn_mul_1)
+	li	r7, 0
+L(ent):	ld	r11, 0(up)
+	cmpdi	cr6, n, 2
+	addi	r0, n, -1	C FIXME: postpone
+	srdi	r0, r0, 1	C FIXME: postpone
+	mtctr	r0		C FIXME: postpone
+	rldicl.	r12, n, 0,63	C r0 = n & 3, set cr0
+	bne	cr0, L(b1)
+
+L(b0):	ld	r0, 8(up)
+	maddld(	r9, r11, v0, r7)
+	maddhdu(r7, r11, v0, r7)
+	ble	cr6, L(2)
+	ld	r12, 16(up)
+	mulld	r8, r0, v0
+	mulhdu	r5, r0, v0
+	addic	up, up, 16
+	addi	rp, rp, -8
+	b	L(mid)
+
+L(b1):	ld	r0, 0(up)
+	ble	cr6, L(1)
+	ld	r12, 8(up)
+	maddld(	r8, r11, v0, r7)
+	maddhdu(r5, r11, v0, r7)
+	ld	r0, 16(up)
+	mulld	r9, r12, v0
+	mulhdu	r7, r12, v0
+	addic	up, up, 24
+	bdz	L(end)
+
+	ALIGN(16)
+L(top):	ld	r12, 0(up)
+	std	r8, 0(rp)
+	adde	r9, r5, r9
+	mulld	r8, r0, v0
+	mulhdu	r5, r0, v0
+L(mid):	ld	r0, 8(up)
+	std	r9, 8(rp)
+	adde	r8, r7, r8
+	mulld	r9, r12, v0
+	mulhdu	r7, r12, v0
+	addi	rp, rp, 16
+	addi	up, up, 16
+	bdnz	L(top)
+
+L(end):	std	r8, 0(rp)
+	mulld	r8, r0, v0
+	adde	r9, r5, r9
+	mulhdu	r5, r0, v0
+	std	r9, 8(rp)
+	adde	r8, r7, r8
+	std	r8, 16(rp)
+	addze	r3, r5
+	blr
+
+L(2):	mulld	r8, r0, v0
+	mulhdu	r5, r0, v0
+	std	r9, 0(rp)
+	addc	r8, r7, r8
+	std	r8, 8(rp)
+	addze	r3, r5
+	blr
+
+L(1):	maddld(	r8,  r0, v0, r7)
+	std	r8, 0(rp)
+	maddhdu(r3, r0, v0, r7)
+	blr
+EPILOGUE()
-- 
cgit v1.2.3