aboutsummaryrefslogtreecommitdiffstats
path: root/arch/i386/math-emu/polynom_Xsig.S
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:16:31 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:16:31 +0200
commitda957e111bb0c189a4a3bf8a00caaecb59ed94ca (patch)
tree6916075fdd3e28869dcd3dfa2cf160a74d1cb02e /arch/i386/math-emu/polynom_Xsig.S
parent2ec1df4130c60d1eb49dc0fa0ed15858fede6b05 (diff)
downloadkernel_samsung_smdk4412-da957e111bb0c189a4a3bf8a00caaecb59ed94ca.zip
kernel_samsung_smdk4412-da957e111bb0c189a4a3bf8a00caaecb59ed94ca.tar.gz
kernel_samsung_smdk4412-da957e111bb0c189a4a3bf8a00caaecb59ed94ca.tar.bz2
i386: move math-emu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/i386/math-emu/polynom_Xsig.S')
-rw-r--r--arch/i386/math-emu/polynom_Xsig.S135
1 files changed, 0 insertions, 135 deletions
diff --git a/arch/i386/math-emu/polynom_Xsig.S b/arch/i386/math-emu/polynom_Xsig.S
deleted file mode 100644
index 17315c8..0000000
--- a/arch/i386/math-emu/polynom_Xsig.S
+++ /dev/null
@@ -1,135 +0,0 @@
-/*---------------------------------------------------------------------------+
- | polynomial_Xsig.S |
- | |
- | Fixed point arithmetic polynomial evaluation. |
- | |
- | Copyright (C) 1992,1993,1994,1995 |
- | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
- | Australia. E-mail billm@jacobi.maths.monash.edu.au |
- | |
- | Call from C as: |
- | void polynomial_Xsig(Xsig *accum, unsigned long long x, |
- | unsigned long long terms[], int n) |
- | |
- | Computes: |
- | terms[0] + (terms[1] + (terms[2] + ... + (terms[n-1]*x)*x)*x)*x) ... )*x |
- | and adds the result to the 12 byte Xsig. |
- | The terms[] are each 8 bytes, but all computation is performed to 12 byte |
- | precision. |
- | |
- | This function must be used carefully: most overflow of intermediate |
- | results is controlled, but overflow of the result is not. |
- | |
- +---------------------------------------------------------------------------*/
- .file "polynomial_Xsig.S"
-
-#include "fpu_emu.h"
-
-
-#define TERM_SIZE $8
-#define SUM_MS -20(%ebp) /* sum ms long */
-#define SUM_MIDDLE -24(%ebp) /* sum middle long */
-#define SUM_LS -28(%ebp) /* sum ls long */
-#define ACCUM_MS -4(%ebp) /* accum ms long */
-#define ACCUM_MIDDLE -8(%ebp) /* accum middle long */
-#define ACCUM_LS -12(%ebp) /* accum ls long */
-#define OVERFLOWED -16(%ebp) /* addition overflow flag */
-
-.text
-ENTRY(polynomial_Xsig)
- pushl %ebp
- movl %esp,%ebp
- subl $32,%esp
- pushl %esi
- pushl %edi
- pushl %ebx
-
- movl PARAM2,%esi /* x */
- movl PARAM3,%edi /* terms */
-
- movl TERM_SIZE,%eax
- mull PARAM4 /* n */
- addl %eax,%edi
-
- movl 4(%edi),%edx /* terms[n] */
- movl %edx,SUM_MS
- movl (%edi),%edx /* terms[n] */
- movl %edx,SUM_MIDDLE
- xor %eax,%eax
- movl %eax,SUM_LS
- movb %al,OVERFLOWED
-
- subl TERM_SIZE,%edi
- decl PARAM4
- js L_accum_done
-
-L_accum_loop:
- xor %eax,%eax
- movl %eax,ACCUM_MS
- movl %eax,ACCUM_MIDDLE
-
- movl SUM_MIDDLE,%eax
- mull (%esi) /* x ls long */
- movl %edx,ACCUM_LS
-
- movl SUM_MIDDLE,%eax
- mull 4(%esi) /* x ms long */
- addl %eax,ACCUM_LS
- adcl %edx,ACCUM_MIDDLE
- adcl $0,ACCUM_MS
-
- movl SUM_MS,%eax
- mull (%esi) /* x ls long */
- addl %eax,ACCUM_LS
- adcl %edx,ACCUM_MIDDLE
- adcl $0,ACCUM_MS
-
- movl SUM_MS,%eax
- mull 4(%esi) /* x ms long */
- addl %eax,ACCUM_MIDDLE
- adcl %edx,ACCUM_MS
-
- testb $0xff,OVERFLOWED
- jz L_no_overflow
-
- movl (%esi),%eax
- addl %eax,ACCUM_MIDDLE
- movl 4(%esi),%eax
- adcl %eax,ACCUM_MS /* This could overflow too */
-
-L_no_overflow:
-
-/*
- * Now put the sum of next term and the accumulator
- * into the sum register
- */
- movl ACCUM_LS,%eax
- addl (%edi),%eax /* term ls long */
- movl %eax,SUM_LS
- movl ACCUM_MIDDLE,%eax
- adcl (%edi),%eax /* term ls long */
- movl %eax,SUM_MIDDLE
- movl ACCUM_MS,%eax
- adcl 4(%edi),%eax /* term ms long */
- movl %eax,SUM_MS
- sbbb %al,%al
- movb %al,OVERFLOWED /* Used in the next iteration */
-
- subl TERM_SIZE,%edi
- decl PARAM4
- jns L_accum_loop
-
-L_accum_done:
- movl PARAM1,%edi /* accum */
- movl SUM_LS,%eax
- addl %eax,(%edi)
- movl SUM_MIDDLE,%eax
- adcl %eax,4(%edi)
- movl SUM_MS,%eax
- adcl %eax,8(%edi)
-
- popl %ebx
- popl %edi
- popl %esi
- leave
- ret