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/arch/ppc/math-emu/fsubs.c

https://bitbucket.org/evzijst/gittest
C | 42 lines | 32 code | 10 blank | 0 comment | 8 complexity | 7e1584acae85e07e0f1bfc8e0a746526 MD5 | raw file
 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#include "single.h"
 8
 9int
10fsubs(void *frD, void *frA, void *frB)
11{
12	FP_DECL_D(A);
13	FP_DECL_D(B);
14	FP_DECL_D(R);
15	int ret = 0;
16
17#ifdef DEBUG
18	printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
19#endif
20
21	__FP_UNPACK_D(A, frA);
22	__FP_UNPACK_D(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		ret |= 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	return (ret | __FP_PACK_DS(frD, R));
42}