1 files changed, 143 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/i586/sub_n.S b/REORG.TODO/sysdeps/i386/i586/sub_n.S
new file mode 100644
index 0000000000..21b5a2742c
--- /dev/null
+++ b/REORG.TODO/sysdeps/i386/i586/sub_n.S
@@ -0,0 +1,143 @@
+/* Pentium __mpn_sub_n -- Subtract two limb vectors of the same length > 0
+   and store difference in a third limb vector.
+   Copyright (C) 1992-2017 Free Software Foundation, Inc.
+   This file is part of the GNU MP Library.
+
+   The GNU MP Library is free software; you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or (at your
+   option) any later version.
+
+   The GNU MP Library is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+   License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with the GNU MP Library; see the file COPYING.LIB.  If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+#define PARMS	4+16		/* space for 4 saved regs */
+#define RES	PARMS
+#define S1	RES+4
+#define S2	S1+4
+#define SIZE	S2+4
+
+	.text
+ENTRY (__mpn_sub_n)
+
+	pushl	%edi
+	cfi_adjust_cfa_offset (4)
+	pushl	%esi
+	cfi_adjust_cfa_offset (4)
+	pushl	%ebp
+	cfi_adjust_cfa_offset (4)
+	pushl	%ebx
+	cfi_adjust_cfa_offset (4)
+
+	movl	RES(%esp),%edi
+	cfi_rel_offset (edi, 12)
+	movl	S1(%esp),%esi
+	cfi_rel_offset (esi, 8)
+	movl	S2(%esp),%ebx
+	cfi_rel_offset (ebx, 0)
+	movl	SIZE(%esp),%ecx
+	movl	(%ebx),%ebp
+	cfi_rel_offset (ebp, 4)
+
+	decl	%ecx
+	movl	%ecx,%edx
+	shrl	$3,%ecx
+	andl	$7,%edx
+	testl	%ecx,%ecx		/* zero carry flag */
+	jz	L(end)
+	pushl	%edx
+	cfi_adjust_cfa_offset (4)
+
+	ALIGN (3)
+L(oop):	movl	28(%edi),%eax		/* fetch destination cache line */
+	leal	32(%edi),%edi
+
+L(1):	movl	(%esi),%eax
+	movl	4(%esi),%edx
+	sbbl	%ebp,%eax
+	movl	4(%ebx),%ebp
+	sbbl	%ebp,%edx
+	movl	8(%ebx),%ebp
+	movl	%eax,-32(%edi)
+	movl	%edx,-28(%edi)
+
+L(2):	movl	8(%esi),%eax
+	movl	12(%esi),%edx
+	sbbl	%ebp,%eax
+	movl	12(%ebx),%ebp
+	sbbl	%ebp,%edx
+	movl	16(%ebx),%ebp
+	movl	%eax,-24(%edi)
+	movl	%edx,-20(%edi)
+
+L(3):	movl	16(%esi),%eax
+	movl	20(%esi),%edx
+	sbbl	%ebp,%eax
+	movl	20(%ebx),%ebp
+	sbbl	%ebp,%edx
+	movl	24(%ebx),%ebp
+	movl	%eax,-16(%edi)
+	movl	%edx,-12(%edi)
+
+L(4):	movl	24(%esi),%eax
+	movl	28(%esi),%edx
+	sbbl	%ebp,%eax
+	movl	28(%ebx),%ebp
+	sbbl	%ebp,%edx
+	movl	32(%ebx),%ebp
+	movl	%eax,-8(%edi)
+	movl	%edx,-4(%edi)
+
+	leal	32(%esi),%esi
+	leal	32(%ebx),%ebx
+	decl	%ecx
+	jnz	L(oop)
+
+	popl	%edx
+	cfi_adjust_cfa_offset (-4)
+L(end):
+	decl	%edx			/* test %edx w/o clobbering carry */
+	js	L(end2)
+	incl	%edx
+L(oop2):
+	leal	4(%edi),%edi
+	movl	(%esi),%eax
+	sbbl	%ebp,%eax
+	movl	4(%ebx),%ebp
+	movl	%eax,-4(%edi)
+	leal	4(%esi),%esi
+	leal	4(%ebx),%ebx
+	decl	%edx
+	jnz	L(oop2)
+L(end2):
+	movl	(%esi),%eax
+	sbbl	%ebp,%eax
+	movl	%eax,(%edi)
+
+	sbbl	%eax,%eax
+	negl	%eax
+
+	popl	%ebx
+	cfi_adjust_cfa_offset (-4)
+	cfi_restore (ebx)
+	popl	%ebp
+	cfi_adjust_cfa_offset (-4)
+	cfi_restore (ebp)
+	popl	%esi
+	cfi_adjust_cfa_offset (-4)
+	cfi_restore (esi)
+	popl	%edi
+	cfi_adjust_cfa_offset (-4)
+	cfi_restore (edi)
+
+	ret
+END (__mpn_sub_n)