1 files changed, 153 insertions, 0 deletions
diff --git a/arch/x86/math-emu/fpu_arith.c b/arch/x86/math-emu/fpu_arith.c
new file mode 100644
index 000000000..09006dc47
--- /dev/null
+++ b/arch/x86/math-emu/fpu_arith.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0
+/*---------------------------------------------------------------------------+
+ |  fpu_arith.c                                                              |
+ |                                                                           |
+ | Code to implement the FPU register/register arithmetic instructions       |
+ |                                                                           |
+ | Copyright (C) 1992,1993,1997                                              |
+ |                  W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
+ |                  E-mail   billm@suburbia.net                              |
+ |                                                                           |
+ |                                                                           |
+ +---------------------------------------------------------------------------*/
+
+#include "fpu_system.h"
+#include "fpu_emu.h"
+#include "control_w.h"
+#include "status_w.h"
+
+void fadd__(void)
+{
+	/* fadd st,st(i) */
+	int i = FPU_rm;
+	clear_C1();
+	FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
+}
+
+void fmul__(void)
+{
+	/* fmul st,st(i) */
+	int i = FPU_rm;
+	clear_C1();
+	FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
+}
+
+void fsub__(void)
+{
+	/* fsub st,st(i) */
+	clear_C1();
+	FPU_sub(0, FPU_rm, control_word);
+}
+
+void fsubr_(void)
+{
+	/* fsubr st,st(i) */
+	clear_C1();
+	FPU_sub(REV, FPU_rm, control_word);
+}
+
+void fdiv__(void)
+{
+	/* fdiv st,st(i) */
+	clear_C1();
+	FPU_div(0, FPU_rm, control_word);
+}
+
+void fdivr_(void)
+{
+	/* fdivr st,st(i) */
+	clear_C1();
+	FPU_div(REV, FPU_rm, control_word);
+}
+
+void fadd_i(void)
+{
+	/* fadd st(i),st */
+	int i = FPU_rm;
+	clear_C1();
+	FPU_add(&st(i), FPU_gettagi(i), i, control_word);
+}
+
+void fmul_i(void)
+{
+	/* fmul st(i),st */
+	clear_C1();
+	FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
+}
+
+void fsubri(void)
+{
+	/* fsubr st(i),st */
+	clear_C1();
+	FPU_sub(DEST_RM, FPU_rm, control_word);
+}
+
+void fsub_i(void)
+{
+	/* fsub st(i),st */
+	clear_C1();
+	FPU_sub(REV | DEST_RM, FPU_rm, control_word);
+}
+
+void fdivri(void)
+{
+	/* fdivr st(i),st */
+	clear_C1();
+	FPU_div(DEST_RM, FPU_rm, control_word);
+}
+
+void fdiv_i(void)
+{
+	/* fdiv st(i),st */
+	clear_C1();
+	FPU_div(REV | DEST_RM, FPU_rm, control_word);
+}
+
+void faddp_(void)
+{
+	/* faddp st(i),st */
+	int i = FPU_rm;
+	clear_C1();
+	if (FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0)
+		FPU_pop();
+}
+
+void fmulp_(void)
+{
+	/* fmulp st(i),st */
+	clear_C1();
+	if (FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0)
+		FPU_pop();
+}
+
+void fsubrp(void)
+{
+	/* fsubrp st(i),st */
+	clear_C1();
+	if (FPU_sub(DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
+}
+
+void fsubp_(void)
+{
+	/* fsubp st(i),st */
+	clear_C1();
+	if (FPU_sub(REV | DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
+}
+
+void fdivrp(void)
+{
+	/* fdivrp st(i),st */
+	clear_C1();
+	if (FPU_div(DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
+}
+
+void fdivp_(void)
+{
+	/* fdivp st(i),st */
+	clear_C1();
+	if (FPU_div(REV | DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
+}