1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <linux/errno.h>
4 #include <linux/uaccess.h>
5
6 #include <asm/sfp-machine.h>
7 #include <math-emu/soft-fp.h>
8 #include <math-emu/double.h>
9
10 int
11 fcmpo(u32 *ccr, int crfD, void *frA, void *frB)
12 {
13 FP_DECL_D(A);
14 FP_DECL_D(B);
15 FP_DECL_EX;
16 int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
17 long cmp;
18
19 #ifdef DEBUG
20 printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB);
21 #endif
22
23 FP_UNPACK_DP(A, frA);
24 FP_UNPACK_DP(B, frB);
25
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 FP_SET_EXCEPTION(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 FP_CUR_EXCEPTIONS;
48 }
49
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