1#include <linux/types.h>
2#include <linux/errno.h>
3#include <asm/uaccess.h>
4
5#include <asm/sfp-machine.h>
6#include <math-emu/soft-fp.h>
7#include <math-emu/double.h>
8
9int
10fsub(void *frD, void *frA, void *frB)
11{
12	FP_DECL_D(A);
13	FP_DECL_D(B);
14	FP_DECL_D(R);
15	FP_DECL_EX;
16
17#ifdef DEBUG
18	printk("%s: %p %p %p\n", __func__, frD, frA, frB);
19#endif
20
21	FP_UNPACK_DP(A, frA);
22	FP_UNPACK_DP(B, frB);
23
24#ifdef DEBUG
25	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
26	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
27#endif
28
29	if (B_c != FP_CLS_NAN)
30		B_s ^= 1;
31
32	if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
33		FP_SET_EXCEPTION(EFLAG_VXISI);
34
35	FP_ADD_D(R, A, B);
36
37#ifdef DEBUG
38	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
39#endif
40
41	__FP_PACK_D(frD, R);
42
43	return FP_CUR_EXCEPTIONS;
44}
45