blob: 65631fa5dc3945b38ebae7e2447746dc7c8f1029 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#include <linux/types.h>
3#include <linux/errno.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -08004#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005
Kumar Galad2b194e2008-06-04 02:59:29 -05006#include <asm/sfp-machine.h>
7#include <math-emu/soft-fp.h>
8#include <math-emu/double.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10int
11fcmpu(u32 *ccr, int crfD, void *frA, void *frB)
12{
13 FP_DECL_D(A);
14 FP_DECL_D(B);
Kumar Galad2b194e2008-06-04 02:59:29 -050015 FP_DECL_EX;
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
17 long cmp;
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 FP_CMP_D(cmp, A, B, 2);
32 cmp = code[(cmp + 1) & 3];
33
34 __FPU_FPSCR &= ~(0x1f000);
35 __FPU_FPSCR |= (cmp << 12);
36
37 *ccr &= ~(15 << ((7 - crfD) << 2));
38 *ccr |= (cmp << ((7 - crfD) << 2));
39
40#ifdef DEBUG
41 printk("CR: %08x\n", *ccr);
42#endif
43
44 return 0;
45}