PageRenderTime 12ms CodeModel.GetById 2ms app.highlight 7ms RepoModel.GetById 1ms app.codeStats 0ms

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

https://bitbucket.org/evzijst/gittest
C | 52 lines | 40 code | 12 blank | 0 comment | 15 complexity | f3504728f5b75aff143cef1708ab85b9 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
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}