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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
11fsubs(void *frD, void *frA, void *frB)
12{
13 FP_DECL_D(A);
14 FP_DECL_D(B);
15 FP_DECL_D(R);
Kumar Galad2b194e2008-06-04 02:59:29 -050016 FP_DECL_EX;
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110019 printk("%s: %p %p %p\n", __func__, frD, frA, frB);
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#endif
21
Kumar Galad2b194e2008-06-04 02:59:29 -050022 FP_UNPACK_DP(A, frA);
23 FP_UNPACK_DP(B, frB);
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25#ifdef DEBUG
26 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
27 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
28#endif
29
30 if (B_c != FP_CLS_NAN)
31 B_s ^= 1;
32
33 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
Liu Yu033b8a32008-10-28 11:50:20 +080034 FP_SET_EXCEPTION(EFLAG_VXISI);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36 FP_ADD_D(R, A, B);
37
38#ifdef DEBUG
39 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
40#endif
41
Kumar Galad2b194e2008-06-04 02:59:29 -050042 __FP_PACK_DS(frD, R);
43
44 return FP_CUR_EXCEPTIONS;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045}