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 10 int 11 fnmsub(void *frD, void *frA, void *frB, void *frC) 12 { 13 FP_DECL_D(R); 14 FP_DECL_D(A); 15 FP_DECL_D(B); 16 FP_DECL_D(C); 17 FP_DECL_D(T); 18 FP_DECL_EX; 19 20 #ifdef DEBUG 21 printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC); 22 #endif 23 24 FP_UNPACK_DP(A, frA); 25 FP_UNPACK_DP(B, frB); 26 FP_UNPACK_DP(C, frC); 27 28 #ifdef DEBUG 29 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); 30 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); 31 printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c); 32 #endif 33 34 if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) || 35 (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF)) 36 FP_SET_EXCEPTION(EFLAG_VXIMZ); 37 38 FP_MUL_D(T, A, C); 39 40 if (B_c != FP_CLS_NAN) 41 B_s ^= 1; 42 43 if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF) 44 FP_SET_EXCEPTION(EFLAG_VXISI); 45 46 FP_ADD_D(R, T, B); 47 48 if (R_c != FP_CLS_NAN) 49 R_s ^= 1; 50 51 #ifdef DEBUG 52 printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 53 #endif 54 55 __FP_PACK_D(frD, R); 56 57 return FP_CUR_EXCEPTIONS; 58 } 59