blob: b5dc4498cd71023dfdc237f79415b1043901f36b [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
10fcmpo(u32 *ccr, int crfD, void *frA, void *frB)
11{
12 FP_DECL_D(A);
13 FP_DECL_D(B);
Kumar Galad2b194e2008-06-04 02:59:29 -050014 FP_DECL_EX;
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
16 long cmp;
17 int ret = 0;
18
19#ifdef DEBUG
Harvey Harrisone48b1b42008-03-29 08:21:07 +110020 printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB);
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26#ifdef DEBUG
27 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
28 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
29#endif
30
31 if (A_c == FP_CLS_NAN || B_c == FP_CLS_NAN)
32 ret |= EFLAG_VXVC;
33
34 FP_CMP_D(cmp, A, B, 2);
35 cmp = code[(cmp + 1) & 3];
36
37 __FPU_FPSCR &= ~(0x1f000);
38 __FPU_FPSCR |= (cmp << 12);
39
40 *ccr &= ~(15 << ((7 - crfD) << 2));
41 *ccr |= (cmp << ((7 - crfD) << 2));
42
43#ifdef DEBUG
44 printk("CR: %08x\n", *ccr);
45#endif
46
47 return ret;
48}