ia64/linux-2.6.18-xen.hg

view arch/powerpc/math-emu/fsubs.c @ 0:831230e53067

Import 2.6.18 from kernel.org tarball.
author Ian Campbell <ian.campbell@xensource.com>
date Wed Apr 11 14:15:44 2007 +0100 (2007-04-11)
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1 #include <linux/types.h>
2 #include <linux/errno.h>
3 #include <asm/uaccess.h>
5 #include "soft-fp.h"
6 #include "double.h"
7 #include "single.h"
9 int
10 fsubs(void *frD, void *frA, void *frB)
11 {
12 FP_DECL_D(A);
13 FP_DECL_D(B);
14 FP_DECL_D(R);
15 int ret = 0;
17 #ifdef DEBUG
18 printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
19 #endif
21 __FP_UNPACK_D(A, frA);
22 __FP_UNPACK_D(B, frB);
24 #ifdef DEBUG
25 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
26 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
27 #endif
29 if (B_c != FP_CLS_NAN)
30 B_s ^= 1;
32 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
33 ret |= EFLAG_VXISI;
35 FP_ADD_D(R, A, B);
37 #ifdef DEBUG
38 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
39 #endif
41 return (ret | __FP_PACK_DS(frD, R));
42 }