[deliverable/linux.git] / arch / powerpc / math-emu / mcrfs.c

#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>

#include <asm/sfp-machine.h>
#include <math-emu/soft-fp.h>

int
mcrfs(u32 *ccr, u32 crfD, u32 crfS)
{
	u32 value, clear;

#ifdef DEBUG
	printk("%s: %p (%08x) %d %d\n", __func__, ccr, *ccr, crfD, crfS);
#endif

	clear = 15 << ((7 - crfS) << 2);
	if (!crfS)
		clear = 0x90000000;

	value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
	__FPU_FPSCR &= ~(clear);

	*ccr &= ~(15 << ((7 - crfD) << 2));
	*ccr |= (value << ((7 - crfD) << 2));

#ifdef DEBUG
	printk("CR: %08x\n", __func__, *ccr);
#endif

	return 0;
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/types.h>
	2	#include <linux/errno.h>
	3	#include <asm/uaccess.h>
	4
d2b194ed KG	5	#include <asm/sfp-machine.h>
d2b194ed KG	6	#include <math-emu/soft-fp.h>
1da177e4 LT	7
	8	int
	9	mcrfs(u32 *ccr, u32 crfD, u32 crfS)
	10	{
	11	u32 value, clear;
	12
	13	#ifdef DEBUG
e48b1b45	14	printk("%s: %p (%08x) %d %d\n", __func__, ccr, *ccr, crfD, crfS);
1da177e4 LT	15	#endif
	16
	17	clear = 15 << ((7 - crfS) << 2);
	18	if (!crfS)
	19	clear = 0x90000000;
	20
	21	value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
	22	__FPU_FPSCR &= ~(clear);
	23
	24	*ccr &= ~(15 << ((7 - crfD) << 2));
	25	*ccr \|= (value << ((7 - crfD) << 2));
	26
	27	#ifdef DEBUG
e48b1b45	28	printk("CR: %08x\n", __func__, *ccr);
1da177e4 LT	29	#endif
	30
	31	return 0;
	32	}