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cpu_fp_branch.h
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cpu_fp_branch.h
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/* ES40 emulator.
* Copyright (C) 2007-2008 by the ES40 Emulator Project
*
* WWW : http://sourceforge.net/projects/es40
* E-mail : [email protected]
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Although this is not required, the author would appreciate being notified of,
* and receiving any modifications you may make to the source code that might serve
* the general public.
*/
/**
* \file
* Contains code macros for the processor floating-point branch instructions.
* Based on ARM chapter 4.9.
*
* $Id: cpu_fp_branch.h,v 1.11 2008/02/27 12:04:32 iamcamiel Exp $
*
* X-1.11 Brian Wheeler 27-FEB-2008
* Avoid compiler warnings.
*
* X-1.10 Camiel Vanderhoeven 06-FEB-2008
* Check for FPEN in old floating point code.
*
* X-1.9 Camiel Vanderhoeven 05-FEB-2008
* Only use new floating-point code when HAVE_NEW_FP has been defined.
*
* X-1.8 Camiel Vanderhoeven 30-JAN-2008
* Always use set_pc or add_pc to change the program counter.
*
* X-1.7 Camiel Vanderhoeven 30-JAN-2008
* Remember number of instructions left in current memory page, so
* that the translation-buffer doens't need to be consulted on every
* instruction fetch when the Icache is disabled.
*
* X-1.6 Camiel Vanderhoeven 28-JAN-2008
* Better floating-point exception handling.
*
* X-1.5 Camiel Vanderhoeven 22-JAN-2008
* Implement new floating-point code.
*
* X-1.4 Camiel Vanderhoeven 11-APR-2007
* Moved all data that should be saved to a state file to a structure
* "state".
*
* X-1.3 Camiel Vanderhoeven 30-MAR-2007
* Added old changelog comments.
*
* X-1.2 Camiel Vanderhoeven 13-MAR-2007
* Basic floating point support added.
*
* X-1.1 Camiel Vanderhoeven 18-FEB-2007
* File created. Contains code previously found in AlphaCPU.h
**/
#if defined(HAVE_NEW_FP)
#define DO_FBEQ \
FPSTART; \
if ((state.f[FREG_1] & ~FPR_SIGN) == 0) /* +0 or - 0? */ \
add_pc(DISP_21 * 4);
#define DO_FBGE \
FPSTART; \
if (state.f[FREG_1] <= FPR_SIGN) /* +0 to + n? */ \
add_pc(DISP_21 * 4);
#define DO_FBGT \
FPSTART; \
if (!(state.f[FREG_1] & FPR_SIGN) && (state.f[FREG_1] != 0)) \
/* not - and not 0? */ \
add_pc(DISP_21 * 4);
#define DO_FBLE \
FPSTART; \
if ((state.f[FREG_1] & FPR_SIGN) || (state.f[FREG_1] == 0)) \
/* - or 0? */ \
add_pc(DISP_21 * 4);
#define DO_FBLT \
FPSTART; \
if (state.f[FREG_1] > FPR_SIGN) /* -0 to -n? */ \
add_pc(DISP_21 * 4);
#define DO_FBNE \
FPSTART; \
if ((state.f[FREG_1] & ~FPR_SIGN) != 0) /* not +0 or -0? */ \
add_pc(DISP_21 * 4);
#else
#define DO_FBEQ \
FPSTART; if (state.f[FREG_1] == X64(0000000000000000) || state.f[FREG_1] == X64(8000000000000000)) add_pc(DISP_21 * 4);
#define DO_FBGE \
FPSTART; if (!(state.f[FREG_1]& X64(8000000000000000)) || state.f[FREG_1] == X64(8000000000000000)) add_pc(DISP_21 * 4);
#define DO_FBGT \
FPSTART; if (!(state.f[FREG_1]& X64(8000000000000000)) && state.f[FREG_1] != X64(0000000000000000)) add_pc(DISP_21 * 4);
#define DO_FBLE \
FPSTART; if ((state.f[FREG_1]& X64(8000000000000000)) || state.f[FREG_1] == X64(0000000000000000)) add_pc(DISP_21 * 4);
#define DO_FBLT \
FPSTART; if ((state.f[FREG_1]& X64(8000000000000000)) && state.f[FREG_1] != X64(8000000000000000)) add_pc(DISP_21 * 4);
#define DO_FBNE \
FPSTART; if (state.f[FREG_1] != X64(0000000000000000) && state.f[FREG_1] != X64(8000000000000000)) add_pc(DISP_21 * 4);
#endif