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| // 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>
|
| int
| fmsub(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 (B_c != FP_CLS_NAN)
| B_s ^= 1;
|
| 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);
|
| #ifdef DEBUG
| printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
| #endif
|
| __FP_PACK_D(frD, R);
|
| return FP_CUR_EXCEPTIONS;
| }
|
|
