initial import

1 files changed, 75 insertions, 0 deletions

diff --git a/sysdeps/i386/submul_1.S b/sysdeps/i386/submul_1.S
new file mode 100644
index 0000000000..5ab78f6846
--- /dev/null
+++ b/sysdeps/i386/submul_1.S
@@ -0,0 +1,75 @@
+/* i80386 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
+   the result from a second limb vector.
+
+Copyright (C) 1992, 1994 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 Library General Public License as published by
+the Free Software Foundation; either version 2 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*
+   INPUT PARAMETERS
+   res_ptr	(sp + 4)
+   s1_ptr	(sp + 8)
+   size		(sp + 12)
+   s2_limb	(sp + 16)
+*/
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+#define res_ptr edi
+#define s1_ptr esi
+#define size ecx
+#define s2_limb ebp
+
+	TEXT
+	ALIGN (3)
+	GLOBL	C_SYMBOL_NAME(__mpn_submul_1)
+C_SYMBOL_NAME(__mpn_submul_1:)
+
+	INSN1(push,l	,R(edi))
+	INSN1(push,l	,R(esi))
+	INSN1(push,l	,R(ebx))
+	INSN1(push,l	,R(ebp))
+
+	INSN2(mov,l	,R(res_ptr),MEM_DISP(esp,20))
+	INSN2(mov,l	,R(s1_ptr),MEM_DISP(esp,24))
+	INSN2(mov,l	,R(size),MEM_DISP(esp,28))
+	INSN2(mov,l	,R(s2_limb),MEM_DISP(esp,32))
+
+	INSN2(lea,l	,R(res_ptr),MEM_INDEX(res_ptr,size,4))
+	INSN2(lea,l	,R(s1_ptr),MEM_INDEX(s1_ptr,size,4))
+	INSN1(neg,l	,R(size))
+	INSN2(xor,l	,R(ebx),R(ebx))
+	ALIGN (3)
+Loop:
+	INSN2(mov,l	,R(eax),MEM_INDEX(s1_ptr,size,4))
+	INSN1(mul,l	,R(s2_limb))
+	INSN2(add,l	,R(eax),R(ebx))
+	INSN2(adc,l	,R(edx),$0)
+	INSN2(sub,l	,MEM_INDEX(res_ptr,size,4),R(eax))
+	INSN2(adc,l	,R(edx),$0)
+	INSN2(mov,l	,R(ebx),R(edx))
+
+	INSN1(inc,l	,R(size))
+	INSN1(jnz,	,Loop)
+	INSN2(mov,l	,R(eax),R(ebx))
+
+	INSN1(pop,l	,R(ebp))
+	INSN1(pop,l	,R(ebx))
+	INSN1(pop,l	,R(esi))
+	INSN1(pop,l	,R(edi))
+	ret