1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/types.h>
3*4882a593Smuzhiyun #include <linux/errno.h>
4*4882a593Smuzhiyun #include <linux/uaccess.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <asm/sfp-machine.h>
7*4882a593Smuzhiyun #include <math-emu/soft-fp.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun int
mcrfs(u32 * ccr,u32 crfD,u32 crfS)10*4882a593Smuzhiyun mcrfs(u32 *ccr, u32 crfD, u32 crfS)
11*4882a593Smuzhiyun {
12*4882a593Smuzhiyun u32 value, clear;
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #ifdef DEBUG
15*4882a593Smuzhiyun printk("%s: %p (%08x) %d %d\n", __func__, ccr, *ccr, crfD, crfS);
16*4882a593Smuzhiyun #endif
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun clear = 15 << ((7 - crfS) << 2);
19*4882a593Smuzhiyun if (!crfS)
20*4882a593Smuzhiyun clear = 0x90000000;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
23*4882a593Smuzhiyun __FPU_FPSCR &= ~(clear);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun *ccr &= ~(15 << ((7 - crfD) << 2));
26*4882a593Smuzhiyun *ccr |= (value << ((7 - crfD) << 2));
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #ifdef DEBUG
29*4882a593Smuzhiyun printk("CR: %08x\n", __func__, *ccr);
30*4882a593Smuzhiyun #endif
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return 0;
33*4882a593Smuzhiyun }
34