i386: move math-emu

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 176 insertions, 0 deletions

diff --git a/arch/x86/math-emu/mul_Xsig.S b/arch/x86/math-emu/mul_Xsig.S
new file mode 100644
index 000000000000..717785a53eb4
--- /dev/null
+++ b/arch/x86/math-emu/mul_Xsig.S
@@ -0,0 +1,176 @@
+/*---------------------------------------------------------------------------+
+ |  mul_Xsig.S                                                               |
+ |                                                                           |
+ | Multiply a 12 byte fixed point number by another fixed point number.      |
+ |                                                                           |
+ | Copyright (C) 1992,1994,1995                                              |
+ |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
+ |                       Australia.  E-mail billm@jacobi.maths.monash.edu.au |
+ |                                                                           |
+ | Call from C as:                                                           |
+ |   void mul32_Xsig(Xsig *x, unsigned b)                                    |
+ |                                                                           |
+ |   void mul64_Xsig(Xsig *x, unsigned long long *b)                         |
+ |                                                                           |
+ |   void mul_Xsig_Xsig(Xsig *x, unsigned *b)                                |
+ |                                                                           |
+ | The result is neither rounded nor normalized, and the ls bit or so may    |
+ | be wrong.                                                                 |
+ |                                                                           |
+ +---------------------------------------------------------------------------*/
+        .file   "mul_Xsig.S"
+
+
+#include "fpu_emu.h"
+
+.text
+ENTRY(mul32_Xsig)
+        pushl %ebp
+        movl %esp,%ebp
+        subl $16,%esp
+        pushl %esi
+
+        movl PARAM1,%esi
+        movl PARAM2,%ecx
+
+        xor %eax,%eax
+        movl %eax,-4(%ebp)
+        movl %eax,-8(%ebp)
+
+        movl (%esi),%eax        /* lsl of Xsig */
+        mull %ecx               /* msl of b */
+        movl %edx,-12(%ebp)
+
+        movl 4(%esi),%eax       /* midl of Xsig */
+        mull %ecx               /* msl of b */
+        addl %eax,-12(%ebp)
+        adcl %edx,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 8(%esi),%eax       /* msl of Xsig */
+        mull %ecx               /* msl of b */
+        addl %eax,-8(%ebp)
+        adcl %edx,-4(%ebp)
+
+        movl -12(%ebp),%eax
+        movl %eax,(%esi)
+        movl -8(%ebp),%eax
+        movl %eax,4(%esi)
+        movl -4(%ebp),%eax
+        movl %eax,8(%esi)
+
+        popl %esi
+        leave
+        ret
+
+
+ENTRY(mul64_Xsig)
+        pushl %ebp
+        movl %esp,%ebp
+        subl $16,%esp
+        pushl %esi
+
+        movl PARAM1,%esi
+        movl PARAM2,%ecx
+
+        xor %eax,%eax
+        movl %eax,-4(%ebp)
+        movl %eax,-8(%ebp)
+
+        movl (%esi),%eax        /* lsl of Xsig */
+        mull 4(%ecx)            /* msl of b */
+        movl %edx,-12(%ebp)
+
+        movl 4(%esi),%eax       /* midl of Xsig */
+        mull (%ecx)             /* lsl of b */
+        addl %edx,-12(%ebp)
+        adcl $0,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 4(%esi),%eax       /* midl of Xsig */
+        mull 4(%ecx)            /* msl of b */
+        addl %eax,-12(%ebp)
+        adcl %edx,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 8(%esi),%eax       /* msl of Xsig */
+        mull (%ecx)             /* lsl of b */
+        addl %eax,-12(%ebp)
+        adcl %edx,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 8(%esi),%eax       /* msl of Xsig */
+        mull 4(%ecx)            /* msl of b */
+        addl %eax,-8(%ebp)
+        adcl %edx,-4(%ebp)
+
+        movl -12(%ebp),%eax
+        movl %eax,(%esi)
+        movl -8(%ebp),%eax
+        movl %eax,4(%esi)
+        movl -4(%ebp),%eax
+        movl %eax,8(%esi)
+
+        popl %esi
+        leave
+        ret
+
+
+
+ENTRY(mul_Xsig_Xsig)
+        pushl %ebp
+        movl %esp,%ebp
+        subl $16,%esp
+        pushl %esi
+
+        movl PARAM1,%esi
+        movl PARAM2,%ecx
+
+        xor %eax,%eax
+        movl %eax,-4(%ebp)
+        movl %eax,-8(%ebp)
+
+        movl (%esi),%eax        /* lsl of Xsig */
+        mull 8(%ecx)            /* msl of b */
+        movl %edx,-12(%ebp)
+
+        movl 4(%esi),%eax       /* midl of Xsig */
+        mull 4(%ecx)            /* midl of b */
+        addl %edx,-12(%ebp)
+        adcl $0,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 8(%esi),%eax       /* msl of Xsig */
+        mull (%ecx)             /* lsl of b */
+        addl %edx,-12(%ebp)
+        adcl $0,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 4(%esi),%eax       /* midl of Xsig */
+        mull 8(%ecx)            /* msl of b */
+        addl %eax,-12(%ebp)
+        adcl %edx,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 8(%esi),%eax       /* msl of Xsig */
+        mull 4(%ecx)            /* midl of b */
+        addl %eax,-12(%ebp)
+        adcl %edx,-8(%ebp)
+        adcl $0,-4(%ebp)
+
+        movl 8(%esi),%eax       /* msl of Xsig */
+        mull 8(%ecx)            /* msl of b */
+        addl %eax,-8(%ebp)
+        adcl %edx,-4(%ebp)
+
+        movl -12(%ebp),%edx
+        movl %edx,(%esi)
+        movl -8(%ebp),%edx
+        movl %edx,4(%esi)
+        movl -4(%ebp),%edx
+        movl %edx,8(%esi)
+
+        popl %esi
+        leave
+        ret
+