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