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regs.h
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regs.h
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/* regs.h - architected register state interfaces */
/* SimpleScalar(TM) Tool Suite
* Copyright (C) 1994-2003 by Todd M. Austin, Ph.D. and SimpleScalar, LLC.
* All Rights Reserved.
*
* THIS IS A LEGAL DOCUMENT, BY USING SIMPLESCALAR,
* YOU ARE AGREEING TO THESE TERMS AND CONDITIONS.
*
* No portion of this work may be used by any commercial entity, or for any
* commercial purpose, without the prior, written permission of SimpleScalar,
* LLC ([email protected]). Nonprofit and noncommercial use is permitted
* as described below.
*
* 1. SimpleScalar is provided AS IS, with no warranty of any kind, express
* or implied. The user of the program accepts full responsibility for the
* application of the program and the use of any results.
*
* 2. Nonprofit and noncommercial use is encouraged. SimpleScalar may be
* downloaded, compiled, executed, copied, and modified solely for nonprofit,
* educational, noncommercial research, and noncommercial scholarship
* purposes provided that this notice in its entirety accompanies all copies.
* Copies of the modified software can be delivered to persons who use it
* solely for nonprofit, educational, noncommercial research, and
* noncommercial scholarship purposes provided that this notice in its
* entirety accompanies all copies.
*
* 3. ALL COMMERCIAL USE, AND ALL USE BY FOR PROFIT ENTITIES, IS EXPRESSLY
* PROHIBITED WITHOUT A LICENSE FROM SIMPLESCALAR, LLC ([email protected]).
*
* 4. No nonprofit user may place any restrictions on the use of this software,
* including as modified by the user, by any other authorized user.
*
* 5. Noncommercial and nonprofit users may distribute copies of SimpleScalar
* in compiled or executable form as set forth in Section 2, provided that
* either: (A) it is accompanied by the corresponding machine-readable source
* code, or (B) it is accompanied by a written offer, with no time limit, to
* give anyone a machine-readable copy of the corresponding source code in
* return for reimbursement of the cost of distribution. This written offer
* must permit verbatim duplication by anyone, or (C) it is distributed by
* someone who received only the executable form, and is accompanied by a
* copy of the written offer of source code.
*
* 6. SimpleScalar was developed by Todd M. Austin, Ph.D. The tool suite is
* currently maintained by SimpleScalar LLC ([email protected]). US Mail:
* 2395 Timbercrest Court, Ann Arbor, MI 48105.
*
* Copyright (C) 1994-2003 by Todd M. Austin, Ph.D. and SimpleScalar, LLC.
*/
#ifndef REGS_H
#define REGS_H
#include "host.h"
#include "misc.h"
#include "machine.h"
/*
* This module implements the SimpleScalar architected register state, which
* includes integer and floating point registers and miscellaneous registers.
* The architected register state is as follows:
*
* Integer Register File: Miscellaneous Registers:
* (aka general-purpose registers, GPR's)
*
* +------------------+ +------------------+
* | $r0 (src/sink 0) | | PC | Program Counter
* +------------------+ +------------------+
* | $r1 | | HI | Mult/Div HI val
* +------------------+ +------------------+
* | . | | LO | Mult/Div LO val
* | . | +------------------+
* | . |
* +------------------+
* | $r31 |
* +------------------+
*
* Floating point Register File:
* single-precision: double-precision:
* +------------------+------------------+ +------------------+
* | $f0 | $f1 (for double) | | FCC | FP codes
* +------------------+------------------+ +------------------+
* | $f1 |
* +------------------+
* | . |
* | . |
* | . |
* +------------------+------------------+
* | $f30 | $f31 (for double)|
* +------------------+------------------+
* | $f31 |
* +------------------+
*
* The floating point register file can be viewed as either 32 single-precision
* (32-bit IEEE format) floating point values $f0 to $f31, or as 16
* double-precision (64-bit IEEE format) floating point values $f0 to $f30.
*/
struct regs_t {
md_gpr_t regs_R; /* (signed) integer register file */
md_fpr_t regs_F; /* floating point register file */
md_ctrl_t regs_C; /* control register file */
md_addr_t regs_PC; /* program counter */
md_addr_t regs_NPC; /* next-cycle program counter */
};
/* create a register file */
struct regs_t *regs_create(void);
/* initialize architected register state */
void
regs_init(struct regs_t *regs); /* register file to initialize */
/* dump all architected register state values to output stream STREAM */
void
regs_dump(struct regs_t *regs, /* register file to display */
FILE *stream); /* output stream */
/* destroy a register file */
void
regs_destroy(struct regs_t *regs); /* register file to release */
#endif /* REGS_H */