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