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File: [Development] / linux-2.6-xfs / arch / powerpc / math-emu / fsqrt.c (download)

Revision 1.2, Mon Aug 4 17:03:13 2008 UTC (9 years, 2 months ago) by lachlan.longdrop.melbourne.sgi.com
Branch: MAIN
CVS Tags: HEAD
Changes since 1.1: +1 -1 lines 

Merge up to 2.6.26
Merge of 2.6.x-xfs-melb:linux:31804b by kenmcd.

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

#include "soft-fp.h"
#include "double.h"

int
fsqrt(void *frD, void *frB)
{
	FP_DECL_D(B);
	FP_DECL_D(R);
	int ret = 0;

#ifdef DEBUG
	printk("%s: %p %p %p %p\n", __func__, frD, frB);
#endif

	__FP_UNPACK_D(B, frB);

#ifdef DEBUG
	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
#endif

	if (B_s && B_c != FP_CLS_ZERO)
		ret |= EFLAG_VXSQRT;
	if (B_c == FP_CLS_NAN)
		ret |= EFLAG_VXSNAN;

	FP_SQRT_D(R, B);

#ifdef DEBUG
	printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
#endif

	return (ret | __FP_PACK_D(frD, R));
}