fmsubs.c (1192B)
1// SPDX-License-Identifier: GPL-2.0 2#include <linux/types.h> 3#include <linux/errno.h> 4#include <linux/uaccess.h> 5 6#include <asm/sfp-machine.h> 7#include <math-emu/soft-fp.h> 8#include <math-emu/double.h> 9#include <math-emu/single.h> 10 11int 12fmsubs(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 FP_DECL_EX; 20 21#ifdef DEBUG 22 printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC); 23#endif 24 25 FP_UNPACK_DP(A, frA); 26 FP_UNPACK_DP(B, frB); 27 FP_UNPACK_DP(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 FP_SET_EXCEPTION(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 FP_SET_EXCEPTION(EFLAG_VXISI); 46 47 FP_ADD_D(R, T, B); 48 49#ifdef DEBUG 50 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 51#endif 52 53 __FP_PACK_DS(frD, R); 54 55 return FP_CUR_EXCEPTIONS; 56}