acrn-kernel/arch/powerpc/math-emu/lfs.c

38 lines
632 B
C

#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
#include "soft-fp.h"
#include "double.h"
#include "single.h"
int
lfs(void *frD, void *ea)
{
FP_DECL_D(R);
FP_DECL_S(A);
float f;
#ifdef DEBUG
printk("%s: D %p, ea %p\n", __FUNCTION__, frD, ea);
#endif
if (copy_from_user(&f, ea, sizeof(float)))
return -EFAULT;
__FP_UNPACK_S(A, &f);
#ifdef DEBUG
printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c,
*(unsigned long *)&f);
#endif
FP_CONV(D, S, 2, 1, R, A);
#ifdef DEBUG
printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
#endif
return __FP_PACK_D(frD, R);
}