From ac0e2db600593d5b30550453b78874bfa0611751 Mon Sep 17 00:00:00 2001
From: wkj <devnull@localhost>
Date: Wed, 21 Apr 2004 04:45:31 +0000
Subject: Add basic libmp support for the x86.

---
 src/libmp/386/mpdigdiv.s | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/libmp/386/mpdigdiv.s

(limited to 'src/libmp/386/mpdigdiv.s')

diff --git a/src/libmp/386/mpdigdiv.s b/src/libmp/386/mpdigdiv.s
new file mode 100644
index 00000000..f02e1616
--- /dev/null
+++ b/src/libmp/386/mpdigdiv.s
@@ -0,0 +1,39 @@
+.text
+
+.p2align 2,0x90
+.globl mpdigdiv
+	.type mpdigdiv, @function
+mpdigdiv:
+	/* Prelude */
+	pushl %ebp
+	movl %ebx, -4(%esp)		/* save on stack */
+
+	movl	8(%esp), %ebx
+	movl	(%ebx), %eax
+	movl	4(%ebx), %edx
+
+	movl	12(%esp), %ebx
+	movl	16(%esp), %ebp
+	xorl	%ecx, %ecx
+	cmpl	%ebx, %edx		/* dividend >= 2^32 * divisor */
+	jae	divovfl
+	cmpl	%ecx, %ebx		/* divisor == 1 */
+	je	divovfl
+	divl	%ebx		/* AX = DX:AX/BX */
+	movl	%eax, (%ebp)
+	jmp done
+
+	/* return all 1's */
+divovfl:
+	notl	%ecx
+	movl	%ecx, (%ebp)
+
+done:
+	/* Postlude */
+	movl -4(%esp), %ebx		/* restore from stack */
+	movl %esp, %ebp
+	leave
+	ret
+
+.endmpdigdiv:
+	.size mpdigdiv,.endmpdigdiv-mpdigdiv
-- 
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