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/x86/k6/mmx/com.asm | 103 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/x86/k6/mmx/com.asm

(limited to 'gmp-6.3.0/mpn/x86/k6/mmx/com.asm')

diff --git a/gmp-6.3.0/mpn/x86/k6/mmx/com.asm b/gmp-6.3.0/mpn/x86/k6/mmx/com.asm
new file mode 100644
index 0000000..b747454
--- /dev/null
+++ b/gmp-6.3.0/mpn/x86/k6/mmx/com.asm
@@ -0,0 +1,103 @@
+dnl  AMD K6-2 mpn_com -- mpn bitwise one's complement.
+
+dnl  Copyright 1999-2002 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')
+
+NAILS_SUPPORT(0-31)
+
+
+C    alignment dst/src, A=0mod8 N=4mod8
+C       A/A   A/N   N/A   N/N
+C K6-2  1.0   1.18  1.18  1.18  cycles/limb
+C K6    1.5   1.85  1.75  1.85
+
+
+C void mpn_com (mp_ptr dst, mp_srcptr src, mp_size_t size);
+C
+C Take the bitwise ones-complement of src,size and write it to dst,size.
+
+defframe(PARAM_SIZE,12)
+defframe(PARAM_SRC, 8)
+defframe(PARAM_DST, 4)
+
+	TEXT
+	ALIGN(16)
+PROLOGUE(mpn_com)
+deflit(`FRAME',0)
+
+	movl	PARAM_SIZE, %ecx
+	movl	PARAM_SRC, %eax
+	movl	PARAM_DST, %edx
+	shrl	%ecx
+	jnz	L(two_or_more)
+
+	movl	(%eax), %eax
+	notl_or_xorl_GMP_NUMB_MASK(	%eax)
+	movl	%eax, (%edx)
+	ret
+
+
+L(two_or_more):
+	pushl	%ebx	FRAME_pushl()
+	pcmpeqd	%mm7, %mm7		C all ones
+
+	movl	%ecx, %ebx
+ifelse(GMP_NAIL_BITS,0,,
+`	psrld	$GMP_NAIL_BITS, %mm7')	C clear nails
+
+
+
+	ALIGN(8)
+L(top):
+	C eax	src
+	C ebx	floor(size/2)
+	C ecx	counter
+	C edx	dst
+	C
+	C mm0	scratch
+	C mm7	mask
+
+	movq	-8(%eax,%ecx,8), %mm0
+	pxor	%mm7, %mm0
+	movq	%mm0, -8(%edx,%ecx,8)
+	loop	L(top)
+
+
+	jnc	L(no_extra)
+	movl	(%eax,%ebx,8), %eax
+	notl_or_xorl_GMP_NUMB_MASK(	%eax)
+	movl	%eax, (%edx,%ebx,8)
+L(no_extra):
+
+	popl	%ebx
+	emms_or_femms
+	ret
+
+EPILOGUE()
-- 
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