tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <linux/types.h>
2#include <linux/errno.h>
3#include <asm/uaccess.h>
4
5#include "soft-fp.h"
6
7int
8mcrfs(u32 *ccr, u32 crfD, u32 crfS)
9{
10 u32 value, clear;
11
12#ifdef DEBUG
13 printk("%s: %p (%08x) %d %d\n", __FUNCTION__, ccr, *ccr, crfD, crfS);
14#endif
15
16 clear = 15 << ((7 - crfS) << 2);
17 if (!crfS)
18 clear = 0x90000000;
19
20 value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
21 __FPU_FPSCR &= ~(clear);
22
23 *ccr &= ~(15 << ((7 - crfD) << 2));
24 *ccr |= (value << ((7 - crfD) << 2));
25
26#ifdef DEBUG
27 printk("CR: %08x\n", __FUNCTION__, *ccr);
28#endif
29
30 return 0;
31}