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/alpha/invert_limb.asm | 95 +++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/alpha/invert_limb.asm

(limited to 'gmp-6.3.0/mpn/alpha/invert_limb.asm')

diff --git a/gmp-6.3.0/mpn/alpha/invert_limb.asm b/gmp-6.3.0/mpn/alpha/invert_limb.asm
new file mode 100644
index 0000000..afc010f
--- /dev/null
+++ b/gmp-6.3.0/mpn/alpha/invert_limb.asm
@@ -0,0 +1,95 @@
+dnl  Alpha mpn_invert_limb -- Invert a normalized limb.
+
+dnl  Copyright 1996, 2000-2003, 2007, 2011, 2013 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 EV4:     ?
+C EV5:   137/140  (with BWX/without BWX)
+C EV6:    71/72   (with BWX/without BWX)
+
+C This was compiler generated, with minimal manual edits.  Surely several
+C cycles could be cut with some thought.
+
+ASM_START()
+PROLOGUE(mpn_invert_limb,gp)
+	LEA(	r2, approx_tab)
+	srl	r16, 54, r1
+	srl	r16, 24, r4
+	and	r16, 1, r5
+	bic	r1, 1, r7
+	lda	r4, 1(r4)
+	srl	r16, 1, r3
+	addq	r7, r2, r1
+ifelse(bwx_available_p,1,`
+	ldwu	r0, -512(r1)
+',`
+	ldq_u	r0, -512(r1)
+	extwl	r0, r7, r0
+')
+	addq	r3, r5, r3
+	mull	r0, r0, r1
+	sll	r0, 11, r0
+	mulq	r1, r4, r1
+	srl	r1, 40, r1
+	subq	r0, r1, r0
+	lda	r0, -1(r0)
+	mulq	r0, r0, r2
+	sll	r0, 60, r1
+	sll	r0, 13, r0
+	mulq	r2, r4, r2
+	subq	r1, r2, r1
+	srl	r1, 47, r1
+	addq	r0, r1, r0
+	mulq	r0, r3, r3
+	srl	r0, 1, r1
+	cmoveq	r5, 0, r1
+	subq	r1, r3, r1
+	umulh	r1, r0, r3
+	sll	r0, 31, r0
+	srl	r3, 1, r1
+	addq	r0, r1, r0
+	mulq	r0, r16, r2
+	umulh	r0, r16, r3
+	addq	r2, r16, r1
+	addq	r3, r16, r16
+	cmpult	r1, r2, r1
+	addq	r16, r1, r3
+	subq	r0, r3, r0
+	ret	r31, (r26), 1
+EPILOGUE()
+DATASTART(approx_tab,8)
+forloop(i,256,512-1,dnl
+`	.word	eval(0x7fd00/i)
+')dnl
+	SIZE(approx_tab, 512)
+	TYPE(approx_tab, object)
+DATAEND()
+ASM_END()
-- 
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