1 #include <linux/types.h> 2 #include <linux/errno.h> 3 #include <asm/uaccess.h> 4 5 #include <asm/sfp-machine.h> 6 #include <math-emu/soft-fp.h> 7 #include <math-emu/double.h> 8 9 int 10 fsub(void *frD, void *frA, void *frB) 11 { 12 FP_DECL_D(A); 13 FP_DECL_D(B); 14 FP_DECL_D(R); 15 FP_DECL_EX; 16 17 #ifdef DEBUG 18 printk("%s: %p %p %p\n", __func__, frD, frA, frB); 19 #endif 20 21 FP_UNPACK_DP(A, frA); 22 FP_UNPACK_DP(B, frB); 23 24 #ifdef DEBUG 25 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); 26 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); 27 #endif 28 29 if (B_c != FP_CLS_NAN) 30 B_s ^= 1; 31 32 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF) 33 FP_SET_EXCEPTION(EFLAG_VXISI); 34 35 FP_ADD_D(R, A, B); 36 37 #ifdef DEBUG 38 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 39 #endif 40 41 __FP_PACK_D(frD, R); 42 43 return FP_CUR_EXCEPTIONS; 44 } 45