57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <asm/sfp-machine.h>
|
|
#include <math-emu/soft-fp.h>
|
|
#include <math-emu/double.h>
|
|
#include <math-emu/single.h>
|
|
|
|
int
|
|
fnmadds(void *frD, void *frA, void *frB, void *frC)
|
|
{
|
|
FP_DECL_D(R);
|
|
FP_DECL_D(A);
|
|
FP_DECL_D(B);
|
|
FP_DECL_D(C);
|
|
FP_DECL_D(T);
|
|
FP_DECL_EX;
|
|
|
|
#ifdef DEBUG
|
|
printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
|
|
#endif
|
|
|
|
FP_UNPACK_DP(A, frA);
|
|
FP_UNPACK_DP(B, frB);
|
|
FP_UNPACK_DP(C, frC);
|
|
|
|
#ifdef DEBUG
|
|
printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
|
|
printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
|
|
printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c);
|
|
#endif
|
|
|
|
if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) ||
|
|
(A_c == FP_CLS_ZERO && C_c == FP_CLS_INF))
|
|
FP_SET_EXCEPTION(EFLAG_VXIMZ);
|
|
|
|
FP_MUL_D(T, A, C);
|
|
|
|
if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF)
|
|
FP_SET_EXCEPTION(EFLAG_VXISI);
|
|
|
|
FP_ADD_D(R, T, B);
|
|
|
|
if (R_c != FP_CLS_NAN)
|
|
R_s ^= 1;
|
|
|
|
#ifdef DEBUG
|
|
printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
|
|
#endif
|
|
|
|
__FP_PACK_DS(frD, R);
|
|
|
|
return FP_CUR_EXCEPTIONS;
|
|
}
|