stfs.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * BK Id: SCCS/s.stfs.c 1.6 05/17/01 18:14:23 cort
- */
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <asm/uaccess.h>
- #include "soft-fp.h"
- #include "double.h"
- #include "single.h"
- int
- stfs(void *frS, void *ea)
- {
- FP_DECL_D(A);
- FP_DECL_S(R);
- float f;
- int err;
- #ifdef DEBUG
- printk("%s: S %p, ea %pn", __FUNCTION__, frS, ea);
- #endif
- __FP_UNPACK_D(A, frS);
- #ifdef DEBUG
- printk("A: %ld %lu %lu %ld (%ld)n", A_s, A_f1, A_f0, A_e, A_c);
- #endif
- FP_CONV(S, D, 1, 2, R, A);
- #ifdef DEBUG
- printk("R: %ld %lu %ld (%ld)n", R_s, R_f, R_e, R_c);
- #endif
- err = _FP_PACK_CANONICAL(S, 1, R);
- if (!err || !__FPU_TRAP_P(err)) {
- __FP_PACK_RAW_1(S, &f, R);
- if (copy_to_user(ea, &f, sizeof(float)))
- return -EFAULT;
- }
- return err;
- }