aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/math-emu/fadd.c
blob: fc8836488b64c13baf9d38a401b70a6f88b420c2 (plain)
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
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>

#include "soft-fp.h"
#include "double.h"

int
fadd(void *frD, void *frA, void *frB)
{
	FP_DECL_D(A);
	FP_DECL_D(B);
	FP_DECL_D(R);
	int ret = 0;

#ifdef DEBUG
	printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
#endif

	__FP_UNPACK_D(A, frA);
	__FP_UNPACK_D(B, frB);

#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);
#endif

	if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
		ret |= EFLAG_VXISI;

	FP_ADD_D(R, A, B);

#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));
}