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/arm64/mul_1.asm | 128 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/arm64/mul_1.asm

(limited to 'gmp-6.3.0/mpn/arm64/mul_1.asm')

diff --git a/gmp-6.3.0/mpn/arm64/mul_1.asm b/gmp-6.3.0/mpn/arm64/mul_1.asm
new file mode 100644
index 0000000..fb965ef
--- /dev/null
+++ b/gmp-6.3.0/mpn/arm64/mul_1.asm
@@ -0,0 +1,128 @@
+dnl  ARM64 mpn_mul_1
+
+dnl  Contributed to the GNU project by Torbjörn Granlund.
+
+dnl  Copyright 2013, 2015, 2017 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 Cortex-A53	7.5-8
+C Cortex-A57	 7
+C Cortex-A72
+C X-Gene	 4
+C Apple M1	 1
+
+C TODO
+C  * Start first multiply earlier.
+
+changecom(blah)
+
+define(`rp', `x0')
+define(`up', `x1')
+define(`n',  `x2')
+define(`v0', `x3')
+
+
+PROLOGUE(mpn_mul_1c)
+	adds	xzr, xzr, xzr		C clear cy flag
+	b	L(com)
+EPILOGUE()
+
+PROLOGUE(mpn_mul_1)
+	adds	x4, xzr, xzr		C clear register and cy flag
+L(com):	lsr	x17, n, #2
+	tbnz	n, #0, L(bx1)
+
+L(bx0):	mov	x11, x4
+	tbz	n, #1, L(b00)
+
+L(b10):	ldp	x4, x5, [up]
+	mul	x8, x4, v0
+	umulh	x10, x4, v0
+	cbz	x17, L(2)
+	ldp	x6, x7, [up,#16]!
+	mul	x9, x5, v0
+	b	L(mid)-8
+
+L(2):	mul	x9, x5, v0
+	b	L(2e)
+
+L(bx1):	ldr	x7, [up],#8
+	mul	x9, x7, v0
+	umulh	x11, x7, v0
+	adds	x9, x9, x4
+	str	x9, [rp],#8
+	tbnz	n, #1, L(b10)
+
+L(b01):	cbz	x17, L(1)
+
+L(b00):	ldp	x6, x7, [up]
+	mul	x8, x6, v0
+	umulh	x10, x6, v0
+	ldp	x4, x5, [up,#16]
+	mul	x9, x7, v0
+	adcs	x12, x8, x11
+	umulh	x11, x7, v0
+	add	rp, rp, #16
+	sub	x17, x17, #1
+	cbz	x17, L(end)
+
+	ALIGN(16)
+L(top):	mul	x8, x4, v0
+	ldp	x6, x7, [up,#32]!
+	adcs	x13, x9, x10
+	umulh	x10, x4, v0
+	mul	x9, x5, v0
+	stp	x12, x13, [rp,#-16]
+	adcs	x12, x8, x11
+	umulh	x11, x5, v0
+L(mid):	mul	x8, x6, v0
+	ldp	x4, x5, [up,#16]
+	adcs	x13, x9, x10
+	umulh	x10, x6, v0
+	mul	x9, x7, v0
+	stp	x12, x13, [rp],#32
+	adcs	x12, x8, x11
+	umulh	x11, x7, v0
+	sub	x17, x17, #1
+	cbnz	x17, L(top)
+
+L(end):	mul	x8, x4, v0
+	adcs	x13, x9, x10
+	umulh	x10, x4, v0
+	mul	x9, x5, v0
+	stp	x12, x13, [rp,#-16]
+L(2e):	adcs	x12, x8, x11
+	umulh	x11, x5, v0
+	adcs	x13, x9, x10
+	stp	x12, x13, [rp]
+L(1):	adc	x0, x11, xzr
+	ret
+EPILOGUE()
-- 
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