This commit was manufactured by cvs2svn to create branch 'captive'.

[reactos.git] / ntoskrnl / rtl / i386 / allmul.s

diff --git a/ntoskrnl/rtl/i386/allmul.s b/ntoskrnl/rtl/i386/allmul.s
new file mode 100644 (file)
index 0000000..ab310d0
--- /dev/null
+++ b/ntoskrnl/rtl/i386/allmul.s
@@ -0,0 +1,54 @@
+/* $Id$
+ *
+ * COPYRIGHT:         See COPYING in the top level directory
+ * PROJECT:           ReactOS kernel
+ * PURPOSE:           Math support for IA-32
+ * FILE:              ntoskrnl/rtl/i386/allmul.s
+ * PROGRAMER:         Eric Kohl (ekohl@rz-online.de)
+ */
+
+/*
+ * long long
+ * __allmul(long long Multiplier, long long Multiplicand);
+ *
+ * Parameters:
+ *   [ESP+04h] - long long Multiplier
+ *   [ESP+0Ch] - long long Multiplicand
+ * Registers:
+ *   Unknown
+ * Returns:
+ *   EDX:EAX - long long product (Multiplier*Multiplicand)
+ * Notes:
+ *   Routine removes the arguments from the stack.
+ */
+.globl __allmul
+__allmul:
+       pushl   %ebp
+       movl    %esp, %ebp
+       pushl   %edi
+       pushl   %esi
+       pushl   %ebx
+       subl    $12, %esp
+       movl    16(%ebp), %ebx
+       movl    8(%ebp), %eax
+       mull    %ebx
+       movl    20(%ebp), %ecx
+       movl    %eax, -24(%ebp)
+       movl    8(%ebp), %eax
+       movl    %edx, %esi
+       imull   %ecx, %eax
+       addl    %eax, %esi
+       movl    12(%ebp), %eax
+       imull   %eax, %ebx
+       leal    (%ebx,%esi), %eax
+       movl    %eax, -20(%ebp)
+       movl    -24(%ebp), %eax
+       movl    -20(%ebp), %edx
+       addl    $12, %esp
+       popl    %ebx
+       popl    %esi
+       popl    %edi
+       popl    %ebp
+       ret             $0x10
+
+/* EOF */