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- /* Definitions of target machine for GNU compiler.
- Generic Tektronix 6000 series NS32000 version.
- See ns32k/tek6100.h and ns32k/tek6200.h, which include this file.
- Copyright (C) 1990 Free Software Foundation, Inc.
- Created by Snoopy (sopwith.uucp!snoopy).
- Based on work by Mark Mason (mason@reed.bitnet,
- pyramid!unify!mason@uunet.uu.net) and Keith Packard.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Generate syntax for the UTek assembler. */
- #ifndef UTEK_ASM
- #define UTEK_ASM
- #endif
-
- /* Two flags to control how addresses are printed in assembler insns. */
-
- /* The way PUT_ABSOLUTE_PREFIX in ns32k.h works, setting it to 0 will
- * turn it off. Define ABSOLUTE_PREFIX before including ns32k.h.
- */
- #define ABSOLUTE_PREFIX 0
- #define IMMEDIATE_PREFIX '$'
-
- #include "ns32k/ns32k.h"
-
- /* Define these after ns32k.c so we will notice if gcc tries to
- * output external mode addressing. UTek's as and ld do not support
- * external mode addressing, according to Daryl McDaniel (illian.uucp!darylm).
- * Hopefully the UTek assembler will complain if gcc feeds it this stuff.
- * They don't seem to do anything, I think that gcc is not actually
- * trying to generate external mode operands.
- */
- #undef PUT_EXTERNAL_PREFIX
- #define PUT_EXTERNAL_PREFIX(arg) fprintf(arg, " Should not be using external mode under UTek. ")
- #define EXTERNAL_PREFIX '%'
-
- /* Used in ns32k.c to control syntax. */
- #define NO_ABSOLUTE_PREFIX_IF_SYMBOLIC
- #define NO_IMMEDIATE_PREFIX_IF_SYMBOLIC
-
- /* Used in ns32k.md to specify syntax of bsr/jsr operand. */
- #define CALL_MEMREF_IMPLICIT
-
- /* #define PC_RELATIVE */ /* Seems to break things. */
- #define BASE_REG_NEEDED /* Seems to fix problem where external mode
- * syntax was being generated.
- */
-
- /* ------------ Debugging Support ----------------------------- */
-
- /* The sdb support does not yet work with UTek. Need to teach gcc
- * how to create sdb type stabs as well as dbx style stabs.
- */
- #define DBX_DEBUGGING_INFO
- /* #define SDB_DEBUGGING_INFO */
-
- /* Act the same as the UTek complier: -g for dbx, -go for sdb.
- * This is used in toplev.c.
- */
- #define PREFERRED_DEBUGGING_TYPE \
- ((len > 1 && !strncmp(str, "go", len)) ? SDB_DEBUG : DBX_DEBUG )
-
- /* Sequent has some changes in the format of DBX symbols. */
- #define DBX_NO_XREFS 1
-
- /* Don't split DBX symbols into continuations. */
- #define DBX_CONTIN_LENGTH 0
-
- /* ------------------------------------------- */
-
- #define TARGET_DEFAULT 1
-
- /* These control the C++ compiler somehow. */
- #define FASCIST_ASSEMBLER
- #define USE_COLLECT
-
- /* Print subsidiary information on the compiler version in use. */
- #undef TARGET_VERSION
- #define TARGET_VERSION fprintf (stderr, " (ns32k, UTek syntax)");
-
- /* The tek6100.h and tek6200.h files add stratos or merlin respectively. */
-
- #define CPP_PREDEFINES_Tek6000 \
- "-Dns16000 -Dns32000 -Dns32k -Dns32016 -DUTek -DUTEK -Dbsd -DBSD \
- -Asystem(unix) -Asystem(bsd) -Acpu(ns32k) -Amachine(ns32k)"
- #undef CPP_PREDEFINES
- #define CPP_PREDEFINES CPP_PREDEFINES_Tek6000
-
- /* This is how to align the code that follows an unconditional branch.
- Don't define it, since it confuses the assembler (we hear). */
-
- #undef ASM_OUTPUT_ALIGN_CODE
-
- /* Assembler pseudo-op for shared data segment. */
- #define SHARED_SECTION_ASM_OP ".shdata"
-
- #ifdef UTEK_ASM
- #undef FUNCTION_PROLOGUE
-
- /* This differs from the one in ns32k.h in printing a bitmask
- rather than a register list in the enter or save instruction. */
-
- #define FUNCTION_PROLOGUE(FILE, SIZE) \
- { register int regno, g_regs_used = 0; \
- int used_regs_buf[8], *bufp = used_regs_buf; \
- int used_fregs_buf[8], *fbufp = used_fregs_buf; \
- extern char call_used_regs[]; \
- MAIN_FUNCTION_PROLOGUE; \
- for (regno = 0; regno < 8; regno++) \
- if (regs_ever_live[regno] \
- && ! call_used_regs[regno]) \
- { \
- *bufp++ = regno; g_regs_used++; \
- } \
- *bufp = -1; \
- for (; regno < 16; regno++) \
- if (regs_ever_live[regno] && !call_used_regs[regno]) { \
- *fbufp++ = regno; \
- } \
- *fbufp = -1; \
- bufp = used_regs_buf; \
- if (frame_pointer_needed) \
- fprintf (FILE, "\tenter "); \
- else if (g_regs_used) \
- fprintf (FILE, "\tsave "); \
- if (frame_pointer_needed || g_regs_used) \
- { \
- char mask = 0; \
- while (*bufp >= 0) \
- mask |= 1 << *bufp++; \
- fprintf (FILE, "$0x%x", (int) mask & 0xff); \
- } \
- if (frame_pointer_needed) \
- fprintf (FILE, ",$%d\n", SIZE); \
- else if (g_regs_used) \
- fprintf (FILE, "\n"); \
- fbufp = used_fregs_buf; \
- while (*fbufp >= 0) \
- { \
- if ((*fbufp & 1) || (fbufp[0] != fbufp[1] - 1)) \
- fprintf (FILE, "\tmovf f%d,tos\n", *fbufp++ - 8); \
- else \
- { \
- fprintf (FILE, "\tmovl f%d,tos\n", fbufp[0] - 8); \
- fbufp += 2; \
- } \
- } \
- }
-
- #undef FUNCTION_EPILOGUE
-
- /* This differs from the one in ns32k.h in printing a bitmask
- rather than a register list in the exit or restore instruction. */
-
- #define FUNCTION_EPILOGUE(FILE, SIZE) \
- { register int regno, g_regs_used = 0, f_regs_used = 0; \
- int used_regs_buf[8], *bufp = used_regs_buf; \
- int used_fregs_buf[8], *fbufp = used_fregs_buf; \
- extern char call_used_regs[]; \
- *fbufp++ = -2; \
- for (regno = 8; regno < 16; regno++) \
- if (regs_ever_live[regno] && !call_used_regs[regno]) { \
- *fbufp++ = regno; f_regs_used++; \
- } \
- fbufp--; \
- for (regno = 0; regno < 8; regno++) \
- if (regs_ever_live[regno] \
- && ! call_used_regs[regno]) \
- { \
- *bufp++ = regno; g_regs_used++; \
- } \
- while (fbufp > used_fregs_buf) \
- { \
- if ((*fbufp & 1) && fbufp[0] == fbufp[-1] + 1) \
- { \
- fprintf (FILE, "\tmovl tos,f%d\n", fbufp[-1] - 8); \
- fbufp -= 2; \
- } \
- else fprintf (FILE, "\tmovf tos,f%d\n", *fbufp-- - 8); \
- } \
- if (frame_pointer_needed) \
- fprintf (FILE, "\texit "); \
- else if (g_regs_used) \
- fprintf (FILE, "\trestore "); \
- if (g_regs_used || frame_pointer_needed) \
- { \
- char mask = 0; \
- \
- while (bufp > used_regs_buf) \
- { \
- /* Utek assembler takes care of reversing this */ \
- mask |= 1 << *--bufp; \
- } \
- fprintf (FILE, "$0x%x\n", (int) mask & 0xff); \
- } \
- if (current_function_pops_args) \
- fprintf (FILE, "\tret $%d\n", current_function_pops_args); \
- else fprintf (FILE, "\tret $0\n"); }
-
- /* UTek assembler needs "ret $0", not "ret 0". */
- #undef TRANSFER_FROM_TRAMPOLINE
- #define TRANSFER_FROM_TRAMPOLINE \
- void \
- __transfer_from_trampoline () \
- { \
- asm ("___trampoline:"); \
- asm ("movd 16(r2),tos"); \
- asm ("movd 12(r2),r2"); \
- asm ("ret $0"); \
- }
-
- #endif /* UTEK_ASM */
-
- #undef PRINT_OPERAND_ADDRESS
- #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address(FILE, ADDR)
-
- /* The UTek library supplies bcopy() and friends, not memcpy(). */
- #ifdef TARGET_MEM_FUNCTIONS
- #undef TARGET_MEM_FUNCTIONS
- #endif
-