config_targ2.cxx

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/*

  Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if 
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU General Public License along
  with this program; if not, write the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston MA 02111-1307, USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

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*/


/* ====================================================================
 * ====================================================================
 *
 *
 * Revision history:
 *  26-Feb-97 - Original Version, extracted from config.c.
 *
 * Description:
 *
 * Configure the -TARG group (included in config.c).
 * See config_targ2.h for usage conventions.
 * See config_targ.* for more general target configuration support.
 *
 * NOTE:  There is an approximate distinction between -TARG option
 * group flags and their configuration (in this file), and more generic
 * target configuration (in config_targ.c).  Note that the related
 * header file config_targ.h is included in config.h, and hence in most
 * source files, whereas config_targ2.h is only included directly, so
 * putting new -TARG option-related variables in here is to be
 * preferred to putting them in config_targ.[hc].
 *
 * ====================================================================
 * ====================================================================
 */

/* This file is included in config.c, so it doesn't need its own set of
 * standard includes -- only the following:
 */
#include "config_targ2.h"

/* ====================================================================
 * List of global variables that are set by the -TARG option group
 * ====================================================================
 */

/* General target control: */
char *ABI_Name = NULL;          /* -TARG:abi=xxx */
char *ISA_Name = NULL;          /* -TARG:isa=xxx */
char *Processor_Name = NULL;    /* -TARG:processor=xxx */
static char * Platform_Name = NULL;
INT16 Target_FPRs = 0;          /* -TARG:fp_regs=nn */
BOOL Pure_ABI = FALSE;          /* Avoid non-ABI constructs? */

/* Fault handling: */
BOOL Force_FP_Precise_Mode = FALSE;     /* Force precise FP traps? */
BOOL Force_Memory_Dismiss = FALSE;      /* Force mem fault dismissal? */
BOOL Force_Page_Zero = FALSE;           /* Force mapping page zero? */
BOOL Force_SMM = FALSE;                 /* Force sequential memory? */
char *FP_Excp_Max = NULL;               /* Max FP trap enables */
char *FP_Excp_Min = NULL;               /* Min FP trap enables */
BOOL Flush_To_Zero = FALSE;             /* suppress fp underflow */

/* Miscellaneous target instruction features: */
BOOL Madd_Allowed = TRUE;               /* Generate madd instructions? */
BOOL Force_Jalr = FALSE;        /* Force calls via address in register */
static BOOL Slow_CVTDL_Set = FALSE;

BOOL Itanium_a0_step = FALSE;
BOOL SYNC_Allowed = TRUE;
BOOL Slow_CVTDL = FALSE;

/* Target machine specification options.  This group defines the target
 * ABI, ISA, processor, and FPR count.  It should also be the home for
 * options like specifying processor revisions.
 */
static OPTION_DESC Options_TARG[] = {
  { OVK_NAME,   OV_VISIBLE,     FALSE, "abi",           "ab",
    0, 0, 0, &ABI_Name,         NULL,
    "Specify the ABI to follow" },
  { OVK_NAME,   OV_VISIBLE,     FALSE, "isa",           "is",
    0, 0, 0, &ISA_Name,         NULL,
    "Specify the instruction set architecture to use" },
#if 0
  { OVK_SELF,   OV_SHY,         FALSE, "mips1", NULL,
    0, 0, 0, &ISA_Name,         NULL,
    "Use the MIPS-I instruction set architecture" },
  { OVK_SELF,   OV_SHY,         FALSE, "mips2", NULL,
    0, 0, 0, &ISA_Name,         NULL,
    "Use the MIPS-II instruction set architecture" },
  { OVK_SELF,   OV_SHY,         FALSE, "mips3", NULL,
    0, 0, 0, &ISA_Name,         NULL,
    "Use the MIPS-III instruction set architecture" },
  { OVK_SELF,   OV_SHY,         FALSE, "mips4", NULL,
    0, 0, 0, &ISA_Name,         NULL,
    "Use the MIPS-IV instruction set architecture" },
  { OVK_SELF,   OV_SHY,         FALSE, "mips5", NULL,
    0, 0, 0, &ISA_Name,         NULL,
    "Use the MIPS-V instruction set architecture" },
  { OVK_SELF,   OV_SHY,         FALSE, "mips6", NULL,
    0, 0, 0, &ISA_Name,         NULL,
    "Use the MIPS-VI instruction set architecture" },
#endif
  { OVK_NAME,   OV_VISIBLE,     FALSE, "platform",      "pl",
    0, 0, 0, &Platform_Name,    NULL,
    "Specify the target platform" },
  { OVK_NAME,   OV_VISIBLE,     FALSE, "processor",     "pr",
    0, 0, 0, &Processor_Name,   NULL,
    "Specify the target microprocessor" },

  /* Miscellaneous features: */
  { OVK_BOOL,   OV_VISIBLE,     FALSE, "dismiss_mem_faults",    "dis",
    0, 0, 0,    &Force_Memory_Dismiss, NULL,
    "Force kernel to ignore memory faults (SIGSEGV/SIGBUS)" },
  { OVK_NAME,   OV_VISIBLE,     FALSE, "exc_max",       "exc_ma",
    0, 0, 0,    &FP_Excp_Max,   NULL,
    "Specify the only floating point exceptions which may be trapped" },
  { OVK_NAME,   OV_VISIBLE,     FALSE, "exc_min",       "exc_mi",
    0, 0, 0,    &FP_Excp_Min,   NULL,
    "Specify any floating point exceptions which must be trapped" },
  { OVK_BOOL,   OV_SHY,         FALSE, "force_jalr",    "",
    0, 0, 0,    &Force_Jalr,    NULL,
    "Force use of JALR instruction for all subprogram calls" },
  { OVK_BOOL,   OV_VISIBLE,     FALSE, "flush_to_zero", "",
    0, 0, 0,    &Flush_To_Zero, NULL,
    "Suppress floating point underflow exceptions" },
  { OVK_BOOL,   OV_VISIBLE,     FALSE, "fp_precise",    "fp_p",
    0, 0, 0,    &Force_FP_Precise_Mode, NULL,
    "Force the processor into precise floating point mode" },
  { OVK_INT32,  OV_INTERNAL,    FALSE, "fp_regs",       "fp_r",
    32, 16, 32, &Target_FPRs,   NULL,
    "Specify number of FP registers to use (16 or 32)" },
  { OVK_BOOL,   OV_VISIBLE,     FALSE, "madd",          "",
    0, 0, 0,    &Madd_Allowed,  NULL,
    "Specify whether to generate MADD instructions" },
  { OVK_BOOL,   OV_SHY,         FALSE, "page_zero",     "",
    0, 0, 0,    &Force_Page_Zero, NULL,
    "Force the kernel to map page zero into address space" },
  { OVK_BOOL,   OV_INTERNAL,    FALSE, "slow_cvtdl", "",
    0, 0, 0,    &Slow_CVTDL,    &Slow_CVTDL_Set,
    "" },
  { OVK_BOOL,   OV_SHY,         FALSE, "seq_memory",    "seq",
    0, 0, 0,    &Force_SMM,     NULL,
    "Force the processor into sequential memory mode" },
  { OVK_BOOL,   OV_VISIBLE,     FALSE, "sync", "",
    0, 0, 0,    &SYNC_Allowed,  NULL,
    "Specify whether to generate SYNC instructions" },
  { OVK_BOOL,   OV_INTERNAL,    FALSE, "pure",  "pu",
    0, 0, 0,    &Pure_ABI,      NULL,
    "Generate pure ABI-compliant code" },

  { OVK_BOOL,   OV_INTERNAL,    FALSE, "ma0_step", "",
    0, 0, 0,    &Itanium_a0_step, NULL,
    "" },

  /* Unimplemented options: */
  /* Obsolete options: */

  { OVK_COUNT }         /* List terminator -- must be last */
};


/* ====================================================================
 *
 * Configure_Source_TARG
 *
 * Same as Configure_Source except here we handle target specifics.
 *
 * ====================================================================
 */
static void
Configure_Source_TARG ( char *filename )
{
}