1/* 2 * BK Id: SCCS/s.fnmsub.c 1.6 05/17/01 18:14:22 cort 3 */ 4#include <linux/types.h> 5#include <linux/errno.h> 6#include <asm/uaccess.h> 7 8#include "soft-fp.h" 9#include "double.h" 10 11int 12fnmsub(void *frD, void *frA, void *frB, void *frC) 13{ 14 FP_DECL_D(R); 15 FP_DECL_D(A); 16 FP_DECL_D(B); 17 FP_DECL_D(C); 18 FP_DECL_D(T); 19 int ret = 0; 20 21#ifdef DEBUG 22 printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC); 23#endif 24 25 __FP_UNPACK_D(A, frA); 26 __FP_UNPACK_D(B, frB); 27 __FP_UNPACK_D(C, frC); 28 29#ifdef DEBUG 30 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); 31 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); 32 printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c); 33#endif 34 35 if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) || 36 (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF)) 37 ret |= EFLAG_VXIMZ; 38 39 FP_MUL_D(T, A, C); 40 41 if (B_c != FP_CLS_NAN) 42 B_s ^= 1; 43 44 if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF) 45 ret |= EFLAG_VXISI; 46 47 FP_ADD_D(R, T, B); 48 49 if (R_c != FP_CLS_NAN) 50 R_s ^= 1; 51 52#ifdef DEBUG 53 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 54#endif 55 56 return (ret | __FP_PACK_D(frD, R)); 57} 58