1/*
2 * BK Id: SCCS/s.fnmadds.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
13fnmadds(void *frD, void *frA, void *frB, void *frC)
14{
15	FP_DECL_D(R);
16	FP_DECL_D(A);
17	FP_DECL_D(B);
18	FP_DECL_D(C);
19	FP_DECL_D(T);
20	int ret = 0;
21
22#ifdef DEBUG
23	printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC);
24#endif
25
26	__FP_UNPACK_D(A, frA);
27	__FP_UNPACK_D(B, frB);
28	__FP_UNPACK_D(C, frC);
29
30#ifdef DEBUG
31	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
32	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
33	printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
34#endif
35
36	if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
37	    (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
38                ret |= EFLAG_VXIMZ;
39
40	FP_MUL_D(T, A, C);
41
42	if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
43		ret |= EFLAG_VXISI;
44
45	FP_ADD_D(R, T, B);
46
47	if (R_c != FP_CLS_NAN)
48		R_s ^= 1;
49
50#ifdef DEBUG
51	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
52#endif
53
54	return (ret | __FP_PACK_DS(frD, R));
55}
56