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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | #include <linux/types.h> |
3 | #include <linux/errno.h> | |
7c0f6ba6 | 4 | #include <linux/uaccess.h> |
1da177e4 | 5 | |
d2b194ed KG |
6 | #include <asm/sfp-machine.h> |
7 | #include <math-emu/soft-fp.h> | |
8 | #include <math-emu/double.h> | |
1da177e4 LT |
9 | |
10 | int | |
11 | fcmpo(u32 *ccr, int crfD, void *frA, void *frB) | |
12 | { | |
13 | FP_DECL_D(A); | |
14 | FP_DECL_D(B); | |
d2b194ed | 15 | FP_DECL_EX; |
1da177e4 LT |
16 | int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) }; |
17 | long cmp; | |
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18 | |
19 | #ifdef DEBUG | |
e48b1b45 | 20 | printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB); |
1da177e4 LT |
21 | #endif |
22 | ||
d2b194ed KG |
23 | FP_UNPACK_DP(A, frA); |
24 | FP_UNPACK_DP(B, frB); | |
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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) | |
033b8a33 | 32 | FP_SET_EXCEPTION(EFLAG_VXVC); |
1da177e4 LT |
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 | ||
033b8a33 | 47 | return FP_CUR_EXCEPTIONS; |
1da177e4 | 48 | } |