1#include <linux/types.h>
2#include <linux/errno.h>
3#include <asm/uaccess.h>
4
5#include "soft-fp.h"
6#include "double.h"
7
8int
9fnmsub(void *frD, void *frA, void *frB, void *frC)
10{
11	FP_DECL_D(R);
12	FP_DECL_D(A);
13	FP_DECL_D(B);
14	FP_DECL_D(C);
15	FP_DECL_D(T);
16	int ret = 0;
17
18#ifdef DEBUG
19	printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC);
20#endif
21
22	__FP_UNPACK_D(A, frA);
23	__FP_UNPACK_D(B, frB);
24	__FP_UNPACK_D(C, frC);
25
26#ifdef DEBUG
27	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
28	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
29	printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
30#endif
31
32	if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
33	    (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
34		ret |= EFLAG_VXIMZ;
35
36	FP_MUL_D(T, A, C);
37
38	if (B_c != FP_CLS_NAN)
39		B_s ^= 1;
40
41	if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
42		ret |= EFLAG_VXISI;
43
44	FP_ADD_D(R, T, B);
45
46	if (R_c != FP_CLS_NAN)
47		R_s ^= 1;
48
49#ifdef DEBUG
50	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
51#endif
52
53	return (ret | __FP_PACK_D(frD, R));
54}
55