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