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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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#include "single.h"
8
9int
10fmsubs(void *frD, void *frA, void *frB, void *frC)
11{
12 FP_DECL_D(R);
13 FP_DECL_D(A);
14 FP_DECL_D(B);
15 FP_DECL_D(C);
16 FP_DECL_D(T);
17 int ret = 0;
18
19#ifdef DEBUG
20 printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC);
21#endif
22
23 __FP_UNPACK_D(A, frA);
24 __FP_UNPACK_D(B, frB);
25 __FP_UNPACK_D(C, frC);
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 printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
31#endif
32
33 if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
34 (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
35 ret |= EFLAG_VXIMZ;
36
37 FP_MUL_D(T, A, C);
38
39 if (B_c != FP_CLS_NAN)
40 B_s ^= 1;
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#ifdef DEBUG
48 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
49#endif
50
51 return (ret | __FP_PACK_DS(frD, R));
52}