1 #include <linux/types.h> 2 #include <linux/errno.h> 3 #include <linux/uaccess.h> 4 5 #include <asm/sfp-machine.h> 6 #include <math-emu/soft-fp.h> 7 #include <math-emu/double.h> 8 #include <math-emu/single.h> 9 10 int 11 lfs(void *frD, void *ea) 12 { 13 FP_DECL_D(R); 14 FP_DECL_S(A); 15 FP_DECL_EX; 16 float f; 17 18 #ifdef DEBUG 19 printk("%s: D %p, ea %p\n", __func__, frD, ea); 20 #endif 21 22 if (copy_from_user(&f, ea, sizeof(float))) 23 return -EFAULT; 24 25 FP_UNPACK_S(A, f); 26 27 #ifdef DEBUG 28 printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c, 29 *(unsigned long *)&f); 30 #endif 31 32 FP_CONV(D, S, 2, 1, R, A); 33 34 #ifdef DEBUG 35 printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 36 #endif 37 38 if (R_c == FP_CLS_NAN) { 39 R_e = _FP_EXPMAX_D; 40 _FP_PACK_RAW_2_P(D, frD, R); 41 } else { 42 __FP_PACK_D(frD, R); 43 } 44 45 return 0; 46 } 47