/* Definitions of target machine for GNU compiler, Lattice Mico32 architecture. Contributed by Jon Beniston Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of GCC. GCC 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 3, or (at your option) any later version. GCC 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 GCC; see the file COPYING3. If not see . */ /*-------------------------------*/ /* Run-time Target Specification */ /*-------------------------------*/ /* Target CPU builtins. */ #define TARGET_CPU_CPP_BUILTINS() \ do \ { \ builtin_define ("__lm32__"); \ builtin_assert ("cpu=lm32"); \ builtin_assert ("machine=lm32"); \ if (TARGET_MULTIPLY_ENABLED) \ builtin_define ("__multiply_enabled__"); \ if (TARGET_DIVIDE_ENABLED) \ builtin_define ("__divide_enabled__"); \ if (TARGET_BARREL_SHIFT_ENABLED) \ builtin_define ("__barrel_shift_enabled__"); \ if (TARGET_SIGN_EXTEND_ENABLED) \ builtin_define ("__sign_extend_enabled__"); \ if (TARGET_USER_ENABLED) \ builtin_define ("__user_enabled__"); \ } \ while (0) #undef ASM_SPEC #define ASM_SPEC "\ %{mmultiply-enabled} \ %{mdivide-enabled} \ %{mbarrel-shift-enabled} \ %{msign-extend-enabled} \ %{muser-enabled} \ " /* Let link script define all link options. Default to using simulator link script. */ #undef STARTFILE_SPEC #define STARTFILE_SPEC "" #undef ENDFILE_SPEC #define ENDFILE_SPEC "" #undef LIB_SPEC #define LIB_SPEC "%{!T*:-T sim.ld}" #undef CC1_SPEC #define CC1_SPEC "%{G*}" /*---------------------------------*/ /* Target machine storage layout. */ /*---------------------------------*/ #define BITS_BIG_ENDIAN 0 #define BYTES_BIG_ENDIAN 1 #define WORDS_BIG_ENDIAN 1 #define BITS_PER_UNIT 8 #define BITS_PER_WORD 32 #define UNITS_PER_WORD 4 #define POINTER_SIZE 32 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ do { \ if (GET_MODE_CLASS (MODE) == MODE_INT \ && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ (MODE) = word_mode; \ } while (0) #define PARM_BOUNDARY 32 #define STACK_BOUNDARY 32 #define BIGGEST_ALIGNMENT 64 #define FUNCTION_BOUNDARY 32 #define EMPTY_FIELD_BOUNDARY 32 #define STRICT_ALIGNMENT 1 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT /* Make strings word-aligned so strcpy from constants will be faster. */ #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ (TREE_CODE (EXP) == STRING_CST \ && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) /* Make arrays and structures word-aligned to allow faster copying etc. */ #define DATA_ALIGNMENT(TYPE, ALIGN) \ ((((ALIGN) < BITS_PER_WORD) \ && (TREE_CODE (TYPE) == ARRAY_TYPE \ || TREE_CODE (TYPE) == UNION_TYPE \ || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) /* We need this for the same reason as DATA_ALIGNMENT, namely to cause character arrays to be word-aligned so that `strcpy' calls that copy constants to character arrays can be done inline, and 'strcmp' can be optimised to use word loads. */ #define LOCAL_ALIGNMENT(TYPE, ALIGN) \ DATA_ALIGNMENT (TYPE, ALIGN) /*----------------------------------------*/ /* Layout of source language data types. */ /*----------------------------------------*/ #define INT_TYPE_SIZE 32 #define SHORT_TYPE_SIZE 16 #define LONG_TYPE_SIZE 32 #define LONG_LONG_TYPE_SIZE 64 #define FLOAT_TYPE_SIZE 32 #define DOUBLE_TYPE_SIZE 64 #define LONG_DOUBLE_TYPE_SIZE 64 #define DEFAULT_SIGNED_CHAR 0 #define SIZE_TYPE "unsigned int" #define PTRDIFF_TYPE "int" /*---------------------------*/ /* Standard register usage. */ /*---------------------------*/ #define FIRST_PSEUDO_REGISTER 32 #define RV_REGNUM 1 #define GP_REGNUM 26 #define FP_REGNUM 27 #define SP_REGNUM 28 #define RA_REGNUM 29 #define G_REG_P(X) ((X)<32) #define FIXED_REGISTERS \ { 1, 0, 0, 0, 0, 0, 0, 0, \ 0, 0, 0, 0, 0, 0, 0, 0, \ 0, 0, 0, 0, 0, 0, 0, 0, \ 0, 0, 1, 0, 1, 0, 1, 1} #define CALL_USED_REGISTERS \ { 1, 1, 1, 1, 1, 1, 1, 1, \ 1, 1, 1, 0, 0, 0, 0, 0, \ 0, 0, 0, 0, 0, 0, 0, 0, \ 0, 0, 1, 0, 1, 0, 1, 1} #define HARD_REGNO_NREGS(REGNO, MODE) \ ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) #define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO) #define MODES_TIEABLE_P(MODE1, MODE2) \ ( GET_MODE_CLASS (MODE1) == MODE_INT \ && GET_MODE_CLASS (MODE2) == MODE_INT \ && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) #define AVOID_CCMODE_COPIES /*----------------------------------*/ /* Register classes and constants. */ /*----------------------------------*/ enum reg_class { NO_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES }; #define N_REG_CLASSES (int) LIM_REG_CLASSES #define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" } #define REG_CLASS_CONTENTS \ { {0x00000000}, \ {0xffffffff}, \ {0xffffffff} \ } #define REGNO_REG_CLASS(REGNO) \ (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS) #define INDEX_REG_CLASS NO_REGS #define BASE_REG_CLASS GENERAL_REGS #define REGNO_OK_FOR_BASE_P(REGNO) \ (G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO])) #define REGNO_OK_FOR_INDEX_P(REGNO) 0 /*----------------------------------------*/ /* Stack Layout and Calling Conventions. */ /*----------------------------------------*/ #define STACK_GROWS_DOWNWARD 1 #define FRAME_GROWS_DOWNWARD 1 #define STACK_POINTER_OFFSET (UNITS_PER_WORD) #define STARTING_FRAME_OFFSET (UNITS_PER_WORD) #define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD) #define STACK_POINTER_REGNUM SP_REGNUM #define FRAME_POINTER_REGNUM FP_REGNUM #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RA_REGNUM) #define RETURN_ADDR_RTX(count, frame) \ lm32_return_addr_rtx (count, frame) /* FIXME - This is not yet supported. */ #define STATIC_CHAIN_REGNUM 9 #define ELIMINABLE_REGS \ {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ } #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO) /*-----------------------------*/ /* Function argument passing. */ /*-----------------------------*/ #define ACCUMULATE_OUTGOING_ARGS 1 /*--------------------------------*/ /* Passing Arguments in Registers */ /*--------------------------------*/ /* The first argument register. */ #define LM32_FIRST_ARG_REG 1 /* The number of (integer) argument register available. */ #define LM32_NUM_ARG_REGS 8 #define CUMULATIVE_ARGS int #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \ (CUM) = 0 #define FUNCTION_ARG_REGNO_P(r) \ (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS)) /*--------------------*/ /* Function results. */ /*--------------------*/ #define FUNCTION_VALUE(VALTYPE, FUNC) \ gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \ && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \ ? word_mode \ : TYPE_MODE (VALTYPE), \ RV_REGNUM) #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM) #define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM) #define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE) #define DEFAULT_PCC_STRUCT_RETURN 0 /* Convert from bytes to ints. */ #define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) /* The number of (integer) registers required to hold a quantity of type MODE. */ #define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE)) /* The number of (integer) registers required to hold a quantity of TYPE MODE. */ #define LM32_NUM_REGS2(MODE, TYPE) \ LM32_NUM_INTS ((MODE) == BLKmode ? \ int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) #define STRUCT_VALUE 0 /*---------------------------*/ /* Function entry and exit. */ /*---------------------------*/ /*-------------*/ /* Profiling. */ /*-------------*/ #define FUNCTION_PROFILER(FILE, LABELNO) /*---------------*/ /* Trampolines. */ /*---------------*/ #define TRAMPOLINE_SIZE 0 /*---------------------*/ /* Addressing Modes. */ /*---------------------*/ #define CONSTANT_ADDRESS_P(X) \ ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH \ || (GET_CODE (X) == CONST))) #define MAX_REGS_PER_ADDRESS 1 #define STRICT_REG_OK_FOR_BASE_P(X) \ (REGNO_OK_FOR_BASE_P (REGNO (X))) #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ (G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X))) #ifdef REG_OK_STRICT #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X) #else #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X) #endif /*-------------------------*/ /* Condition Code Status. */ /*-------------------------*/ #define REVERSIBLE_CC_MODE(MODE) 1 /*---------*/ /* Costs. */ /*---------*/ #define SLOW_BYTE_ACCESS 1 #define NO_FUNCTION_CSE #define BRANCH_COST(speed_p, predictable_p) 4 #define MOVE_RATIO(speed) (speed ? 24 : 3) /*------------*/ /* Sections. */ /*------------*/ #define TEXT_SECTION_ASM_OP "\t.section\t.text" #define DATA_SECTION_ASM_OP "\t.section\t.data" #define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\"" #define BSS_SECTION_ASM_OP "\t.section\t.bss" #define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\"" /*-------*/ /* PIC. */ /*-------*/ #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM) #define JUMP_TABLES_IN_TEXT_SECTION (flag_pic) #define LEGITIMATE_PIC_OPERAND_P(X) \ (!(nonpic_symbol_mentioned_p (X))) /*-------------*/ /* Assembler. */ /*-------------*/ #define ASM_COMMENT_START "#" #define ASM_APP_ON "#APP\n" #define ASM_APP_OFF "#NO_APP\n" #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ do { \ fputc ( '\t', FILE); \ assemble_name (FILE, LABEL1); \ fputs ( " = ", FILE); \ assemble_name (FILE, LABEL2); \ fputc ( '\n', FILE); \ } while (0) /* Override default implementation in elfos.h to support -G. */ #undef ASM_OUTPUT_ALIGNED_LOCAL #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ do { \ if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \ switch_to_section (sbss_section); \ else \ switch_to_section (bss_section); \ ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ if (!flag_inhibit_size_directive) \ ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ ASM_OUTPUT_LABEL(FILE, NAME); \ ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ } while (0) /* Override default implementation in elfos.h to support -G. */ #undef ASM_OUTPUT_ALIGNED_COMMON #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ do \ { \ if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \ { \ switch_to_section (sbss_section); \ (*targetm.asm_out.globalize_label) (FILE, NAME); \ ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ if (!flag_inhibit_size_directive) \ ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ ASM_OUTPUT_LABEL(FILE, NAME); \ ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ } \ else \ { \ switch_to_section (bss_section); \ fprintf ((FILE), "%s", COMMON_ASM_OP); \ assemble_name ((FILE), (NAME)); \ fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ (SIZE), (ALIGN) / BITS_PER_UNIT); \ } \ } \ while (0) #define ASM_OUTPUT_LABEL(FILE, NAME) \ do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0) #define ASM_OUTPUT_LABELREF(FILE,NAME) \ do { \ const char *xname = (NAME); \ if (xname[0] == '@') \ xname += 1; \ if (xname[0] == '*') \ xname += 1; \ fputs (xname, FILE); \ } while (0) #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \ do { \ assemble_name (STREAM, XSTR (SYMBOL, 0)); \ } while (0) #define GLOBAL_ASM_OP "\t.global\t" #define REGISTER_NAMES \ { \ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ "r24", "r25", "gp", "fp", "sp", "ra", "ea", "ba"} #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*')) #define PRINT_OPERAND(FILE, X, CODE) \ lm32_print_operand (FILE, X, CODE) #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ lm32_print_operand_address (FILE, ADDR) #ifndef LOCAL_LABEL_PREFIX #define LOCAL_LABEL_PREFIX "." #endif #define ASM_OUTPUT_ALIGN(FILE,LOG) \ do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0) #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ do { \ char label[64]; \ ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ fprintf (FILE, "\n\t.word\t"); \ assemble_name (FILE, label); \ fprintf (FILE, "\n"); \ } while (0) #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ do { \ char label[64]; \ fprintf (FILE, "\t.word\t("); \ ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ assemble_name (FILE, label); \ fprintf (FILE, "-"); \ ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ assemble_name (FILE, label); \ fprintf (FILE, ")\n"); \ } while (0) /*-------------*/ /* Debugging. */ /*-------------*/ #define DBX_REGISTER_NUMBER(REGNO) (REGNO) #define DEFAULT_GDB_EXTENSIONS 1 /*--------*/ /* Misc. */ /*--------*/ #define CASE_VECTOR_MODE Pmode #define WORD_REGISTER_OPERATIONS #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND #define SHORT_IMMEDIATES_SIGN_EXTEND #define MOVE_MAX UNITS_PER_WORD #define MAX_MOVE_MAX 4 #define SHIFT_COUNT_TRUNCATED 1 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 #define Pmode SImode #define FUNCTION_MODE SImode #ifndef NO_IMPLICIT_EXTERN_C #define NO_IMPLICIT_EXTERN_C #endif #define STORE_FLAG_VALUE 1