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/s390_64/invert_limb.asm | 94 +++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/s390_64/invert_limb.asm

(limited to 'gmp-6.3.0/mpn/s390_64/invert_limb.asm')

diff --git a/gmp-6.3.0/mpn/s390_64/invert_limb.asm b/gmp-6.3.0/mpn/s390_64/invert_limb.asm
new file mode 100644
index 0000000..edcebdd
--- /dev/null
+++ b/gmp-6.3.0/mpn/s390_64/invert_limb.asm
@@ -0,0 +1,94 @@
+dnl  S/390-64 mpn_invert_limb
+
+dnl  Contributed to the GNU project by Torbjorn Granlund.
+
+dnl  Copyright 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 z900	       142
+C z990          86
+C z9		 ?
+C z10	       120
+C z196		 ?
+
+ASM_START()
+	TEXT
+	ALIGN(16)
+PROLOGUE(mpn_invert_limb)
+	stg	%r9, 72(%r15)
+	srlg	%r9, %r2, 55
+	agr	%r9, %r9
+	larl	%r4, approx_tab-512
+	srlg	%r3, %r2, 24
+	aghi	%r3, 1
+	lghi	%r5, 1
+	llgh	%r4, 0(%r9, %r4)
+	sllg	%r9, %r4, 11
+	msgr	%r4, %r4
+	msgr	%r4, %r3
+	srlg	%r4, %r4, 40
+	aghi	%r9, -1
+	sgr	%r9, %r4
+	sllg	%r0, %r9, 60
+	sllg	%r1, %r9, 13
+	msgr	%r9, %r9
+	msgr	%r9, %r3
+	sgr	%r0, %r9
+	ngr	%r5, %r2
+	srlg	%r4, %r2, 1
+	srlg	%r3, %r0, 47
+	agr	%r3, %r1
+	agr	%r4, %r5
+	msgr	%r4, %r3
+	srlg	%r1, %r3, 1
+	lcgr	%r5, %r5
+	ngr	%r1, %r5
+	sgr	%r1, %r4
+	mlgr	%r0, %r3
+	srlg	%r9, %r0, 1
+	sllg	%r4, %r3, 31
+	agr	%r4, %r9
+	lgr	%r1, %r4
+	mlgr	%r0, %r2
+	algr	%r1, %r2
+	alcgr	%r0, %r2
+	lgr	%r2, %r4
+	sgr	%r2, %r0
+	lg	%r9, 72(%r15)
+	br	%r14
+EPILOGUE()
+	RODATA
+	ALIGN(2)
+approx_tab:
+forloop(i,256,512-1,dnl
+`	.word	eval(0x7fd00/i)
+')dnl
+ASM_END()
-- 
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