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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/i386/mul_1.S
downloadglibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz
initial import
Diffstat (limited to 'sysdeps/i386/mul_1.S')
-rw-r--r--sysdeps/i386/mul_1.S74
1 files changed, 74 insertions, 0 deletions
diff --git a/sysdeps/i386/mul_1.S b/sysdeps/i386/mul_1.S
new file mode 100644
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+++ b/sysdeps/i386/mul_1.S
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+/* i80386 __mpn_mul_1 -- Multiply a limb vector with a limb and store
+ the result in 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_mul_1)
+C_SYMBOL_NAME(__mpn_mul_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(mov,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