ia64/linux-2.6.18-xen.hg

view arch/powerpc/math-emu/fsub.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"
8 int
9 fsub(void *frD, void *frA, void *frB)
10 {
11 FP_DECL_D(A);
12 FP_DECL_D(B);
13 FP_DECL_D(R);
14 int ret = 0;
16 #ifdef DEBUG
17 printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
18 #endif
20 __FP_UNPACK_D(A, frA);
21 __FP_UNPACK_D(B, frB);
23 #ifdef DEBUG
24 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
25 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
26 #endif
28 if (B_c != FP_CLS_NAN)
29 B_s ^= 1;
31 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
32 ret |= EFLAG_VXISI;
34 FP_ADD_D(R, A, B);
36 #ifdef DEBUG
37 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
38 #endif
40 return (ret | __FP_PACK_D(frD, R));
41 }