blob: a29239c05e3eecb13b47b193b9e54e4aa04696d2 [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
10fdiv(void *frD, void *frA, void *frB)
11{
12 FP_DECL_D(A);
13 FP_DECL_D(B);
14 FP_DECL_D(R);
Kumar Galad2b194e2008-06-04 02:59:29 -050015 FP_DECL_EX;
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110018 printk("%s: %p %p %p\n", __func__, frD, frA, frB);
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#endif
20
Kumar Galad2b194e2008-06-04 02:59:29 -050021 FP_UNPACK_DP(A, frA);
22 FP_UNPACK_DP(B, frB);
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
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 (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {
Liu Yu033b8a32008-10-28 11:50:20 +080030 FP_SET_EXCEPTION(EFLAG_VXZDZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110032 printk("%s: FPSCR_VXZDZ raised\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#endif
34 }
35 if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
Liu Yu033b8a32008-10-28 11:50:20 +080036 FP_SET_EXCEPTION(EFLAG_VXIDI);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110038 printk("%s: FPSCR_VXIDI raised\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#endif
40 }
41
42 if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
Liu Yu033b8a32008-10-28 11:50:20 +080043 FP_SET_EXCEPTION(EFLAG_DIVZERO);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 if (__FPU_TRAP_P(EFLAG_DIVZERO))
Liu Yu033b8a32008-10-28 11:50:20 +080045 return FP_CUR_EXCEPTIONS;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 }
47 FP_DIV_D(R, A, B);
48
49#ifdef DEBUG
50 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
51#endif
52
Kumar Galad2b194e2008-06-04 02:59:29 -050053 __FP_PACK_D(frD, R);
54
55 return FP_CUR_EXCEPTIONS;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}