blob: f65979fa770eac810e07762874c2c206f38cd602 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/types.h>
2#include <linux/errno.h>
3#include <asm/uaccess.h>
4
Kumar Galad2b194e2008-06-04 02:59:29 -05005#include <asm/sfp-machine.h>
6#include <math-emu/soft-fp.h>
7#include <math-emu/double.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
9int
10fnmsub(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);
Kumar Galad2b194e2008-06-04 02:59:29 -050017 FP_DECL_EX;
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110020 printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#endif
22
Kumar Galad2b194e2008-06-04 02:59:29 -050023 FP_UNPACK_DP(A, frA);
24 FP_UNPACK_DP(B, frB);
25 FP_UNPACK_DP(C, frC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
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))
Liu Yu033b8a32008-10-28 11:50:20 +080035 FP_SET_EXCEPTION(EFLAG_VXIMZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
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)
Liu Yu033b8a32008-10-28 11:50:20 +080043 FP_SET_EXCEPTION(EFLAG_VXISI);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 FP_ADD_D(R, T, B);
46
47 if (R_c != FP_CLS_NAN)
48 R_s ^= 1;
49
50#ifdef DEBUG
51 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
52#endif
53
Kumar Galad2b194e2008-06-04 02:59:29 -050054 __FP_PACK_D(frD, R);
55
56 return FP_CUR_EXCEPTIONS;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057}