blob: 9021dacc03b8b2f1d5326cc03c75ff97eb19d3c8 [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>
8#include <math-emu/single.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10int
11fnmsubs(void *frD, void *frA, void *frB, void *frC)
12{
13 FP_DECL_D(R);
14 FP_DECL_D(A);
15 FP_DECL_D(B);
16 FP_DECL_D(C);
17 FP_DECL_D(T);
Kumar Galad2b194e2008-06-04 02:59:29 -050018 FP_DECL_EX;
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110021 printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#endif
23
Kumar Galad2b194e2008-06-04 02:59:29 -050024 FP_UNPACK_DP(A, frA);
25 FP_UNPACK_DP(B, frB);
26 FP_UNPACK_DP(C, frC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28#ifdef DEBUG
29 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
30 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
31 printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
32#endif
33
34 if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
35 (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
Liu Yu033b8a32008-10-28 11:50:20 +080036 FP_SET_EXCEPTION(EFLAG_VXIMZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38 FP_MUL_D(T, A, C);
39
40 if (B_c != FP_CLS_NAN)
41 B_s ^= 1;
42
43 if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
Liu Yu033b8a32008-10-28 11:50:20 +080044 FP_SET_EXCEPTION(EFLAG_VXISI);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46 FP_ADD_D(R, T, B);
47
48 if (R_c != FP_CLS_NAN)
49 R_s ^= 1;
50
51#ifdef DEBUG
52 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
53#endif
54
Kumar Galad2b194e2008-06-04 02:59:29 -050055 __FP_PACK_DS(frD, R);
56
57 return FP_CUR_EXCEPTIONS;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}