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target/m68k: add fmod/frem

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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>
This commit is contained in:
Laurent Vivier 2018-02-24 21:18:00 +01:00
parent 88857aca93
commit 591596b77a
7 changed files with 176 additions and 2 deletions
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26
target/m68k/softfloat.h Normal file
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/*
* 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