1/*
2 * BK Id: SCCS/s.fsubs.c 1.6 05/17/01 18:14:22 cort
3 */
4#include <linux/types.h>
5#include <linux/errno.h>
6#include <asm/uaccess.h>
7
8#include "soft-fp.h"
9#include "double.h"
10#include "single.h"
11
12int
13fsubs(void *frD, void *frA, void *frB)
14{
15	FP_DECL_D(A);
16	FP_DECL_D(B);
17	FP_DECL_D(R);
18	int ret = 0;
19
20#ifdef DEBUG
21	printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
22#endif
23
24	__FP_UNPACK_D(A, frA);
25	__FP_UNPACK_D(B, frB);
26
27#ifdef DEBUG
28	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
29	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
30#endif
31
32	if (B_c != FP_CLS_NAN)
33		B_s ^= 1;
34
35	if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
36		ret |= EFLAG_VXISI;
37
38	FP_ADD_D(R, A, B);
39
40#ifdef DEBUG
41	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
42#endif
43
44	return (ret | __FP_PACK_DS(frD, R));
45}
46