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regs.c
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regs.c
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/* regs.c - architected registers state routines */
/* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "host.h"
#include "misc.h"
#include "machine.h"
#include "loader.h"
#include "regs.h"
/* create a register file */
struct regs_t *
regs_create(void)
{
struct regs_t *regs;
regs = calloc(1, sizeof(struct regs_t));
if (!regs)
fatal("out of virtual memory");
return regs;
}
/* initialize architected register state */
void
regs_init(struct regs_t *regs) /* register file to initialize */
{
/* FIXME: assuming all entries should be zero... */
memset(regs, 0, sizeof(*regs));
/* regs->regs_R[MD_SP_INDEX] and regs->regs_PC initialized by loader... */
}
#if 0
/* floating point register file format */
union regs_FP_t {
md_gpr_t l[MD_NUM_FREGS]; /* integer word view */
md_SS_FLOAT_TYPE f[SS_NUM_REGS]; /* single-precision FP view */
SS_DOUBLE_TYPE d[SS_NUM_REGS/2]; /* double-precision FP view */
};
/* floating point register file */
extern union md_regs_FP_t regs_F;
/* (signed) hi register, holds mult/div results */
extern SS_WORD_TYPE regs_HI;
/* (signed) lo register, holds mult/div results */
extern SS_WORD_TYPE regs_LO;
/* floating point condition codes */
extern int regs_FCC;
/* program counter */
extern SS_ADDR_TYPE regs_PC;
/* dump all architected register state values to output stream STREAM */
void
regs_dump(FILE *stream) /* output stream */
{
int i;
/* stderr is the default output stream */
if (!stream)
stream = stderr;
/* dump processor register state */
fprintf(stream, "Processor state:\n");
fprintf(stream, " PC: 0x%08x\n", regs_PC);
for (i=0; i<SS_NUM_REGS; i += 2)
{
fprintf(stream, " R[%2d]: %12d/0x%08x",
i, regs_R[i], regs_R[i]);
fprintf(stream, " R[%2d]: %12d/0x%08x\n",
i+1, regs_R[i+1], regs_R[i+1]);
}
fprintf(stream, " HI: %10d/0x%08x LO: %10d/0x%08x\n",
regs_HI, regs_HI, regs_LO, regs_LO);
for (i=0; i<SS_NUM_REGS; i += 2)
{
fprintf(stream, " F[%2d]: %12d/0x%08x",
i, regs_F.l[i], regs_F.l[i]);
fprintf(stream, " F[%2d]: %12d/0x%08x\n",
i+1, regs_F.l[i+1], regs_F.l[i+1]);
}
fprintf(stream, " FCC: 0x%08x\n", regs_FCC);
}
/* (signed) integer register file */
SS_WORD_TYPE regs_R[SS_NUM_REGS];
/* floating point register file */
union regs_FP regs_F;
/* (signed) hi register, holds mult/div results */
SS_WORD_TYPE regs_HI;
/* (signed) lo register, holds mult/div results */
SS_WORD_TYPE regs_LO;
/* floating point condition codes */
int regs_FCC;
/* program counter */
SS_ADDR_TYPE regs_PC;
#endif