target/m68k: add fmod/frem

Using a local m68k floatx80_mod()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

The quotient byte of the FPSR is updated with
the result of the operation.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180224201802.911-3-laurent@vivier.eu>

1 files changed, 26 insertions, 0 deletions

diff --git a/target/m68k/softfloat.h b/target/m68k/softfloat.h
new file mode 100644
index 0000000000..8d8ca0fc45
--- /dev/null
+++ b/target/m68k/softfloat.h
@@ -0,0 +1,26 @@
+/*
+ * Ported from a work by Andreas Grabher for Previous, NeXT Computer Emulator,
+ * derived from NetBSD M68040 FPSP functions,
+ * derived from release 2a of the SoftFloat IEC/IEEE Floating-point Arithmetic
+ * Package. Those parts of the code (and some later contributions) are
+ * provided under that license, as detailed below.
+ * It has subsequently been modified by contributors to the QEMU Project,
+ * so some portions are provided under:
+ *  the SoftFloat-2a license
+ *  the BSD license
+ *  GPL-v2-or-later
+ *
+ * Any future contributions to this file will be taken to be licensed under
+ * the Softfloat-2a license unless specifically indicated otherwise.
+ */
+
+/* Portions of this work are licensed under the terms of the GNU GPL,
+ * version 2 or later. See the COPYING file in the top-level directory.
+ */
+
+#ifndef TARGET_M68K_SOFTFLOAT_H
+#define TARGET_M68K_SOFTFLOAT_H
+#include "fpu/softfloat.h"
+
+floatx80 floatx80_mod(floatx80 a, floatx80 b, float_status *status);
+#endif