1 #include <linux/types.h> 2 #include <linux/errno.h> 3 #include <asm/uaccess.h> 4 5 #include "soft-fp.h" 6 #include "double.h" 7 8 int 9 fsub(void *frD, void *frA, void *frB) 10 { 11 FP_DECL_D(A); 12 FP_DECL_D(B); 13 FP_DECL_D(R); 14 int ret = 0; 15 16 #ifdef DEBUG 17 printk("%s: %p %p %p\n", __func__, frD, frA, frB); 18 #endif 19 20 __FP_UNPACK_D(A, frA); 21 __FP_UNPACK_D(B, frB); 22 23 #ifdef DEBUG 24 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); 25 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); 26 #endif 27 28 if (B_c != FP_CLS_NAN) 29 B_s ^= 1; 30 31 if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF) 32 ret |= EFLAG_VXISI; 33 34 FP_ADD_D(R, A, B); 35 36 #ifdef DEBUG 37 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 38 #endif 39 40 return (ret | __FP_PACK_D(frD, R)); 41 } 42