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Diffstat (limited to 'gcc/config/picochip/picochip.h')
| -rw-r--r-- | gcc/config/picochip/picochip.h | 749 |
1 files changed, 749 insertions, 0 deletions
diff --git a/gcc/config/picochip/picochip.h b/gcc/config/picochip/picochip.h new file mode 100644 index 00000000000..6c92fb48a69 --- /dev/null +++ b/gcc/config/picochip/picochip.h @@ -0,0 +1,749 @@ +/* Definitions of target machine for GNU compiler for picoChip + Copyright (C) 2001, 2008 Free Software Foundation, Inc. + + Contributed by picoChip Designs Ltd. (http://www.picochip.com) + Maintained by Daniel Towner (daniel.towner@picochip.com) and + Hariharan Sandanagobalane (hariharan@picochip.com). + +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 +<http://www.gnu.org/licenses/>. */ + +/* Which type of DFA scheduling to use - schedule for speed (VLIW), or + schedule for space. When scheduling for space, attempt to schedule + into stall cycles, but don't pack instructions. */ + +enum picochip_dfa_type +{ + DFA_TYPE_NONE, + DFA_TYPE_SPACE, + DFA_TYPE_SPEED +}; + +extern enum picochip_dfa_type picochip_schedule_type; + +/* Controlling the Compilation Driver */ + +/* Pass through the save-temps command option. */ +#define LINK_SPEC " %{save-temps:--save-temps}" + +/* This is an embedded processor, and only supports a cut-down version of + * the standard C library. */ +#define LIB_SPEC "-lpicoC" + +/* The start file is automatically provided by the linker. */ +#define STARTFILE_SPEC "" + +/* Run-time Target Specification */ + +/* Define some additional pre-processor macros. */ +#define TARGET_CPU_CPP_BUILTINS() \ + do \ + { \ + builtin_define ("NO_TRAMPOLINES"); \ + builtin_define ("PICOCHIP"); \ + builtin_define ("__PICOCHIP__"); \ + } \ + while (0) + +/* Translate requests for particular AEs into their respective ISA + options. Note that byte access is enabled by default. */ +#define TARGET_OPTION_TRANSLATE_TABLE \ + { "-mae=ANY", "-mmul-type=none -mno-byte-access" }, \ + { "-mae=ANY2", "-mmul-type=none -mno-byte-access" }, \ + { "-mae=ANY3", "-mmul-type=none" }, \ + { "-mae=STAN", "-mmul-type=none -mno-byte-access" }, \ + { "-mae=STAN2", "-mmul-type=mac -mno-byte-access" }, \ + { "-mae=STAN3", "-mmul-type=mac " }, \ + { "-mae=MAC", "-mmul-type=mac -mno-byte-access" }, \ + { "-mae=MUL", "-mmul-type=mul" }, \ + { "-mae=MEM", "-mmul-type=mul" }, \ + { "-mae=MEM2", "-mmul-type=mul" }, \ + { "-mae=CTRL", "-mmul-type=mul" }, \ + { "-mae=CTRL2", "-mmul-type=mul" } + +/* Specify the default options, so that the multilib build doesn't + need to provide special cases for the defaults. */ +#define MULTILIB_DEFAULTS \ + { "mmul-type=mul", "mbyte-access"} + +#define TARGET_HAS_BYTE_ACCESS (picochip_has_byte_access) +#define TARGET_HAS_MUL_UNIT (picochip_has_mul_unit) +#define TARGET_HAS_MAC_UNIT (picochip_has_mac_unit) +#define TARGET_HAS_MULTIPLY (picochip_has_mac_unit || picochip_has_mul_unit) + +/* Allow some options to be overriden. In particular, the 2nd + scheduling pass option is switched off, and a machine dependent + reorganisation ensures that it is run later on, after the second + jump optimisation. */ +#define OVERRIDE_OPTIONS picochip_override_options() + +#define CAN_DEBUG_WITHOUT_FP 1 + +#define TARGET_VERSION fprintf(stderr, "(picoChip)"); + +/* Storage Layout */ + +/* picoChip processors are 16-bit machines, little endian. */ + +#define BITS_BIG_ENDIAN 0 +#define BYTES_BIG_ENDIAN 0 +#define WORDS_BIG_ENDIAN 0 + +#define BITS_PER_UNIT 8 + +#define BITS_PER_WORD 16 +#define UNITS_PER_WORD (BITS_PER_WORD / BITS_PER_UNIT) + +#define POINTER_SIZE BITS_PER_WORD + +/* Promote those modes that are smaller than an int, to int mode. */ +#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ + ((GET_MODE_CLASS (MODE) == MODE_INT \ + && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ + ? (MODE) = HImode : 0) + +/* All parameters are at least this aligned. Parameters are passed + one-per-register. */ +#define PARM_BOUNDARY BITS_PER_WORD + +/* The main stack pointer is guaranteed to be aligned to the most + strict data alignment. */ +#define STACK_BOUNDARY 32 + +/* Function entry point is byte aligned. */ +#define FUNCTION_BOUNDARY 8 + +/* This is the biggest alignment that can be allowed on this machine. + Since the STANs have only 256 byte memory, it doesnt make sense + to have alignments greater than 32 bytes. Hence the value */ +#define MAX_OFILE_ALIGNMENT 32*8 + +/* The strictest data object alignment, which repesents a register pair. */ +#define BIGGEST_ALIGNMENT 32 + +/* The hardware doesn't allow unaligned memory access. */ +#define STRICT_ALIGNMENT 1 + +/* We want the 'unix' style bitfield packing algorithm. */ +#define PCC_BITFIELD_TYPE_MATTERS 1 + +/* Support up to 64-bit integers. */ +#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode) + +/* We don't support floating point, but give it a sensible definition. */ +#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT + +/* Layout of Source Language Data Types. */ + +#define INT_TYPE_SIZE BITS_PER_WORD + +/* The normal sizes for C scalar data. */ +#define CHAR_TYPE_SIZE 8 +#define SHORT_TYPE_SIZE 16 +#define LONG_TYPE_SIZE 32 +#define LONG_LONG_TYPE_SIZE 64 + +/* We don't support the following data types, but still give them + sensible values. */ +#define FLOAT_TYPE_SIZE 32 +#define DOUBLE_TYPE_SIZE 32 +#define LONG_DOUBLE_TYPE_SIZE 32 + +/* Plain `char' is a signed type, since the hardware sign-extends + bytes when loading them from memory into a register. */ +#define DEFAULT_SIGNED_CHAR 1 + +/* Note that the names of the types used in the following macros must + be precisely the same as those defined internally in gcc. For + example, `unsigned short' wouldn't work as a type string, since gcc + doesn't define any type with this exact string. The correct string + to use is `short unsigned int'. */ + +#define SIZE_TYPE "unsigned int" + +#define PTRDIFF_TYPE "int" + +#define WCHAR_TYPE "short unsigned int" +#define WCHAR_TYPE_SIZE 16 + +#define WINT_TYPE "unsigned int" + +/* Register Usage */ + +/* Picochip has 16 16-bit registers, a condition code register and an + (inaccessible) instruction pointer. One of these registers (r15) is + special, and is either used to load a constant anywhere a register + can normally be used, or is used to specify a dummy destination + (e.g., when setting condition flags). We also define some pseudo + registers to represent condition codes, the frame pointer and the + argument pointer. The latter two are eliminated wherever possible. + + Pairs of general registers may be combined to form 32-bit registers. + + The picoChip registers are as follows: + + 0..1 - function return value + 0..5 - first 6 function parameters + 6..11 - General purpose + 12 - link register + 13 - stack pointer + 14 - specialized pointer + 15 - long constant or /dev/null + (16) acc0 + (17) pseudo condition code + (18) pseudo frame pointer + (19) pseudo arg pointer + + Registers 0..6, 12, 13, 14, 15 are caller save + Registers 0..12, 14 are available to the register allocator. + + In addition, the DSP variant of the ISA allows extra accumulator + registers to be accessed. These are special purpose registers, + which are not currently used by the compiler. + + */ + +/* Basic Characteristics of Registers */ + +/* We have 16 hard registers plus 3 pseudo hard registers and an accumulator. */ +#define FIRST_PSEUDO_REGISTER 20 + +/* The first non-hard register. Only used internally by the picoChip port. */ +#define FIRST_NONHARD_REGISTER 18 + +/* Cannot use SP, CST, CC, FP, AP */ +#define FIXED_REGISTERS {0,0,0,0,0,0,0,0, 0,0,0,0,0,1,0,1, 1,1,1,1} + +/* Those that are clobbered by a function call (includes pseudo-regs) */ +#define CALL_USED_REGISTERS {1,1,1,1,1,1,0,0, 0,0,0,0,1,1,0,1, 1,1,1,1} +#define CALL_REALLY_USED_REGISTERS {1,1,1,1,1,1,0,0, 0,0,0,0,1,1,0,0, 0,1,0,0} + +/* Define the number of the picoChip link and condition psuedo registers. */ +#define LINK_REGNUM 12 +#define CC_REGNUM 17 +#define ACC_REGNUM 16 + +/* Order of Allocation of Registers */ + +/* The registers are allocated starting with the caller-clobbered + registers, in reverse order. The registers are then listed in an + order which means that they are efficiently saved in pairs (i.e., + one 32-bit store can be used instead of two 16-bit stores to save + the registers into the stack). The exception to this is the use of + r14 (AP) register, which also appears early on. This is because the + AP register can be used to encode memory operations more + efficiently than other registers. Some code can be made more + compact as a result. */ + /* My current feeling is that r14 should go to the end and maybe even r12. + It seems like the overhead of store/load that will occur since we cant + pair anything up with r14 will be higher than the advantage of smaller + encoding. + Also r12 is put towards the end for leaf functions. Since leaf functions + do not have any calls, the prologue/epilogue for them wouldnt save up/ + restore its value. So, it doesnt make sense for us to use it in the middle, + if we can avoid it. */ +#define REG_ALLOC_ORDER {5,4,3,2,1,0,12,6,7,8,9,10,11,14,16,0,0,0,0,0} +#define LEAF_REG_ALLOC_ORDER {5,4,3,2,1,0,6,7,8,9,10,11,14,12,16,0,0,0,0,0} + +/* We can dynamically change the REG_ALLOC_ORDER using the following hook. + It would be desirable to change it for leaf functions so we can put + r12 at the end of this list.*/ +#define ORDER_REGS_FOR_LOCAL_ALLOC picochip_order_regs_for_local_alloc () + +/* How Values Fit in Registers */ + +/* Number of consecutive hard regs needed starting at reg REGNO + to hold something of mode MODE. */ +#define HARD_REGNO_NREGS(REGNO, MODE) picochip_regno_nregs((REGNO), (MODE)) + +/* Is it ok to place MODE in REGNO? Require that the register number + be aligned. */ +#define HARD_REGNO_MODE_OK(REGNO, MODE) picochip_hard_regno_mode_ok(REGNO, MODE) + +#define MODES_TIEABLE_P(MODE1,MODE2) 1 + +/* Don't copy the cc register ('cos you can't put it back). */ +#define AVOID_CCMODE_COPIES 1 + +/* Register Classes */ + +enum reg_class +{ + NO_REGS, /* no registers in set */ + FRAME_REGS, /* registers with a long offset */ + PTR_REGS, /* registers without an offset */ + CONST_REGS, /* registers for long constants */ + NULL_REGS, /* registers which ignore writes */ + CC_REGS, /* condition code registers */ + ACC_REGS, /* Accumulator registers */ + TWIN_REGS, /* registers which can be paired */ + GR_REGS, /* general purpose registers */ + ALL_REGS, /* all registers */ + LIM_REG_CLASSES, /* max value + 1 */ + + /* Some aliases */ + GENERAL_REGS = GR_REGS +}; + +#define N_REG_CLASSES (int) LIM_REG_CLASSES + +/* The following macro defines cover classes for Integrated Register + Allocator. Cover classes is a set of non-intersected register + classes covering all hard registers used for register allocation + purpose. Any move between two registers of a cover class should be + cheaper than load or store of the registers. The macro value is + array of register classes with LIM_REG_CLASSES used as the end + marker. */ + +#define IRA_COVER_CLASSES \ +{ \ + GR_REGS, LIM_REG_CLASSES \ +} + + +/* The names of the register classes */ +#define REG_CLASS_NAMES \ +{ \ + "NO_REGS", \ + "FRAME_REGS", \ + "PTR_REGS", \ + "CONST_REGS", \ + "NULL_REGS", \ + "CC_REGS", \ + "ACC_REGS", \ + "TWIN_REGS", \ + "GR_REGS", \ + "ALL_REGS" \ +} + +/* Each reg class is an array of 32-bit integers. Each array must be + long enough to store one bit for every pseudo register. Thus in the + following code, each array only stores one 32-bit value. */ +#define REG_CLASS_CONTENTS \ +{ \ + {0x00000000}, /* no registers */ \ + {0x00002000}, /* frame */ \ + {0x00004000}, /* pointer */ \ + {0x00008000}, /* const */ \ + {0x00008000}, /* null */ \ + {0x00020000}, /* cc */ \ + {0x00010000}, /* acc0 */ \ + {0x00000FFF}, /* twin */ \ + {0x000CFFFF}, /* general registers - includes pseudo-arg */ \ + {0x000FFFFF} /* all registers - includes pseudo-arg */ \ +} + +/* The earliest register class containing the given register. */ +extern const enum reg_class picochip_regno_reg_class[FIRST_PSEUDO_REGISTER]; +#define REGNO_REG_CLASS(REGNO) picochip_regno_reg_class[REGNO] + +/* Any register can be a base pointer. */ +#define BASE_REG_CLASS GR_REGS + +/* Any register can be an index. */ +#define INDEX_REG_CLASS GR_REGS + +#define REGNO_OK_FOR_BASE_P(REGNO) \ + (REGNO_REG_CLASS (REGNO) != CC_REGS && REGNO_REG_CLASS (REGNO) != ACC_REGS) + +#define REGNO_OK_FOR_INDEX_P(REGNO) 0 + +#define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS + +#define CLASS_MAX_NREGS(CLASS, MODE) picochip_class_max_nregs(CLASS, MODE) + + +/* Stack Layout and Calling Conventions */ + +#define STACK_GROWS_DOWNWARD 1 + +/* The frame pointer points to the outgoing argument area, so the + locals are above that. */ +#define STARTING_FRAME_OFFSET 0 + +#define FIRST_PARM_OFFSET(FNDECL) 0 + +/* Specify where the return address lives before entry to the + prologue. This is required to enable DWARF debug information to be + generated. */ +#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LINK_REGNUM) + +#define RETURN_ADDR_RTX(count,frameaddr) picochip_return_addr_rtx(count,frameaddr) + +#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LINK_REGNUM) + +/* Registers that Address the Stack Frame */ + +#define STACK_POINTER_REGNUM 13 +#define FRAME_POINTER_REGNUM 18 +#define ARG_POINTER_REGNUM 19 + +/* Static chain is used to pass the local variables of the enclosing function. + The static chain is passed in memory. The first long-word location + beneath the stack pointer is used. In the presence of pretend + arguments, which are written into that location, this mechanism + complicates matters. */ + +/* Location seen by the caller. */ +#define STATIC_CHAIN \ + gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, -2 * UNITS_PER_WORD)) + +/* Location seen by the callee. */ +#define STATIC_CHAIN_INCOMING \ + gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, 0)) + +/* Eliminating Frame Pointer and Arg Pointer. The frame and argument + pointers are eliminated wherever possible, by replacing them with + offsets from the stack pointer. */ + +/* We want to get rid of the frame pointer. */ +#define FRAME_POINTER_REQUIRED 0 + +#define ELIMINABLE_REGS \ + {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ + {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} + +#define CAN_ELIMINATE(FROM, TO) 1 + +#define INITIAL_ELIMINATION_OFFSET(FROM,TO,OFFSET) \ + OFFSET = initial_elimination_offset(FROM, TO); + +#define ACCUMULATE_OUTGOING_ARGS 1 + +#define PUSH_ARGS 0 + +/* Functions don't pop their args. */ +#define RETURN_POPS_ARGS(FNDECL, FNTYPE, STACK) 0 + +/* Passing Arguments in Registers */ + +/* Store the offset of the next argument. */ +#define CUMULATIVE_ARGS unsigned + +/* Decide how function arguments are handled. */ +#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ + picochip_function_arg (CUM, MODE, TYPE, NAMED) + +/* Incoming arguments are always the same as normal arguments, except + for a function which uses variadic arguments, in which case all + arguments are effectively passed on the stack. */ +#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ + picochip_incoming_function_arg(CUM, MODE, TYPE, NAMED) + +#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \ + ((CUM) = 0) + +#define FUNCTION_ARG_ADVANCE(CUM,MODE,TYPE,NAMED) \ + (CUM) = picochip_arg_advance (CUM, MODE, TYPE, NAMED) + +/* Originally this used TYPE_ALIGN to determine the + alignment. Unfortunately, this fails in some cases, because the + type is unknown (e.g., libcall's). Instead, use GET_MODE_ALIGNMENT + since the mode is always present. */ +#define FUNCTION_ARG_BOUNDARY(MODE,TYPE) \ + picochip_get_function_arg_boundary(MODE) + +/* The first 6 registers can hold parameters. */ +#define FUNCTION_ARG_REGNO_P(REGNO) ((REGNO) < 6) + +/* How Scalar Function Values are Returned + Do we need this?? */ +#define FUNCTION_VALUE(VALTYPE,FUNC) picochip_function_value(VALTYPE, FUNC, 0) + +#define LIBCALL_VALUE(MODE) (gen_rtx_REG (MODE, 0)) + +/* Results are in register zero. If an SImode register is returned, + reg0 will suffice to mean R[0:1]. */ +#define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == 0) + +/* Don't automatically pass struct's in memory - use the + * RETURN_IN_MEMORY macro to determine when structs are returned in + * memory, and when in registers. */ +#define DEFAULT_PCC_STRUCT_RETURN 0 + +/* Function Entry and Exit */ + +/* The epilogue doesn't clobber anything. */ +#define EPILOGUE_USES(REGNO) 0 + +/* Generating Code for Profiling. No profiling implemented */ + +#define FUNCTION_PROFILER(FILE,LABELNO) + +/* Trampolines for Nested Functions */ + +/* No trampolines. */ +#define TRAMPOLINE_SIZE 0 +#define INITIALIZE_TRAMPOLINE(ADDR,FNADDR,CHAIN) + +/* Addressing Modes */ + +#define CONSTANT_ADDRESS_P(X) CONSTANT_P(X) + +#define MAX_REGS_PER_ADDRESS 1 + +#ifdef REG_OK_STRICT + +#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ + if (picochip_legitimate_address_p (MODE, X, 1)) goto LABEL; + +#else /* REG_OK_STRICT */ + +#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ + if (picochip_legitimate_address_p (MODE, X, 0)) goto LABEL; + +#endif /* !REG_OK_STRICT */ + +/* extern struct rtx_def *picochip_legitimize_address */ +/* PARAMS ((struct rtx_def *, struct rtx_def *, int)); */ +#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN); + +/* Legitimize reload address tries machine dependent means of + reloading addresses. There seems to be a strange error in gcc, + which necessitates this macro. Consider: + + set (reg A) (symbol_ref) + set (reg B) (plus (reg A) (const_int)) + + A symbol_ref is a valid constant, so the symbol_ref is propagated + into the second instruction to generate the instruction: + + set (reg B) (plus (symbol_ref) (const_int)) + + This is an invalid address, and find_reloads_address correctly + determines this. However, that function doesn't generate a valid + replacement for the now invalid address, and the invalid address is + output into the assembly language. To fix the problem without + changing gcc itself, the following macro tests when such an invalid + address has been computed, and wraps it up inside a constant rtx. A + constant rtx can be correctly reloaded by the function, and hence + correct code is generated. */ + +#define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_LEVELS,WIN) \ +if (picochip_symbol_offset(X)) { X = gen_rtx_CONST(MODE, X); } + +/* There are no mode dependent addresses. */ +#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) do {} while (0) + +/* Nonzero if the constant rtx X is a legitimate general operand. X + satisfies CONSTANT_P. */ + +#define LEGITIMATE_CONSTANT_P(X) 1 + + +/* Condition Code Status */ + +#define CC_STATUS_MDEP unsigned +#define CC_STATUS_MDEP_INIT (cc_status.mdep = 0) + +/* Describing Relative Costs of Operations */ + +/* Bytes are no faster than words. */ +#define SLOW_BYTE_ACCESS 1 + +/* The assembler is often able to optimise function call branches, so + don't try to CSE them in the compiler. This was the thinking before. + But now, we realise that the benefits from CSE would mostly outweigh + the disadvantages. */ +#define NO_FUNCTION_CSE + + +/* Dividing the Output into Sections */ + +#define TEXT_SECTION_ASM_OP ".section .text\n" +#define DATA_SECTION_ASM_OP ".section .data\n" +#define BSS_SECTION_ASM_OP ".section .bss\n" +/* picoChip is Harvard (separate data/instruction memories), so + read-only data must go into the data section. */ +#define READONLY_DATA_SECTION_ASM_OP ".section .data\n" + +/* Defining the Output Assembler Language */ + +/* The Overall Framework of an Assembler File */ + +#define ASM_FILE_COMMENT "// " + +#define ASM_APP_ON "// High-level ASM start\n" +#define ASM_APP_OFF "// High-level ASM end\n" + +#define ASM_OUTPUT_IDENT(STREAM,STRING) fprintf(STREAM, ".ident %s\n", STRING) + +/* Output of Data */ + +#define ASM_OUTPUT_ASCII(FILE, PTR, LEN) picochip_output_ascii(FILE, PTR, LEN); + +/* Output of Uninitialized Variables */ +#define ASM_OUTPUT_ALIGNED_COMMON(FILE,NAME,SIZE,ALIGN) \ + picochip_output_aligned_common(FILE, NAME, SIZE, ALIGN) + +#define ASM_OUTPUT_ALIGNED_LOCAL(FILE,NAME,SIZE,ALIGN) \ + picochip_output_aligned_local(FILE, NAME, SIZE, ALIGN) + +/* Output and Generation of Labels */ + +#define ASM_OUTPUT_LABEL(STREAM,NAME) \ + do { picochip_output_label(STREAM, NAME); } while (0); + +#define ASM_OUTPUT_LABELREF(STREAM, NAME) \ + { picochip_output_labelref(STREAM, NAME); } + +/* Format must match that of picochip_output_label. */ +#define ASM_GENERATE_INTERNAL_LABEL(STRING,PREFIX,NUM) \ + picochip_generate_internal_label(STRING,PREFIX,(long)NUM) + +#define ASM_WEAKEN_LABEL(STREAM,NAME) picochip_weaken_label(STREAM,NAME); + +/* Store in OUTPUT a string (made with alloca) containing an + assembler-name for a local static variable named NAME. LABELNO is + an integer which is different for each call. The assembler can't + use periods to generate the name, so we use a ___ separator + instead. */ + +#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ +( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 15), \ + sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO))) + +/* Macros Controlling Initialization Routines */ + +/* By defining this, the main function won't try to call `__main'. */ +#define HAS_INIT_SECTION + +/* Output of Assembler Instructions */ + +#define REGISTER_NAMES \ +{"R0", "R1", "R2", "R3", \ + "R4", "R5", "R6", "R7", \ + "R8", "R9", "R10", "R11", \ + "R12", "FP", "R14", "R15", \ + "acc0", "pseudoCC", "pseudoFP", "pseudoAP"} + +#define ADDITIONAL_REGISTER_NAMES \ +{ \ + { "R0", 0}, \ + { "R1", 1}, \ + { "R2", 2}, \ + { "R3", 3}, \ + { "R4", 4}, \ + { "R5", 5}, \ + { "R6", 6}, \ + { "R7", 7}, \ + { "R8", 8}, \ + { "R9", 9}, \ + { "R10", 10}, \ + { "R11", 11}, \ + { "R12", 12}, \ + { "FP", 13}, \ + { "R14", 14}, \ + { "R15", 15}, \ + { "acc0", 16}, \ + { "sp", 12}, /* ABI stack pointer */ \ + { "ln", 13}, /* arch link register */ \ + { "ptr", 14}, /* arch constant pointer */ \ + { "rc", 15}, /* arch constant register */ \ + { "rz", 15}, /* arch zero */ \ +} + +/* Final prescan insn is called just before an instruction is + output. In our case, we use this to detect the VLIW slot to which + the instruction has been assigned, preparatory to generating the + VLIW output in ASM_OUTPUT_OPCODE. */ +#define FINAL_PRESCAN_INSN(insn, operand, nop) \ + picochip_final_prescan_insn (insn, operand,nop) + +#define ASM_OUTPUT_OPCODE(FILE,PTR) \ + { PTR = picochip_asm_output_opcode(FILE, PTR); } + +#define PRINT_OPERAND(STREAM,X,CODE) \ + picochip_print_operand(STREAM, X, CODE) + +#define PRINT_OPERAND_PUNCT_VALID_P(code) \ + (((code) == '|') || ((code) == '#') || ((code) == '>')) + +#define PRINT_OPERAND_ADDRESS(STREAM,X) \ + picochip_print_operand_address(STREAM,X) + +/* Output of Dispatch Tables */ + +/* Initialise a data memory location to an absolute code label. Used + for building switch statement jump tables. Note - the format of the + label must match that of the function picochip_output_label. */ +#define ASM_OUTPUT_ADDR_VEC_ELT(stream, value) \ + fprintf (stream, ".initWord _L%d\n", value); + +/* Assembler Commands for Alignment */ + +#define ASM_OUTPUT_SKIP(STREAM,BYTES) \ + fprintf(STREAM, ".skip %u\n", BYTES); +#define ASM_OUTPUT_ALIGN(STREAM,POWER) \ + fprintf(STREAM, ".align %u\n", 1 << POWER); + +/* The elaborator doesn't output zero bytes in the text section. */ +#define ASM_NO_SKIP_IN_TEXT 1 + +/* Controlling Debugging Information Format */ + +/* Macros Affecting All Debugging Formats */ + +#define DBX_REGISTER_NUMBER(REGNO) (REGNO) + +#define DWARF2_DEBUGGING_INFO +#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG +#define DWARF2_FRAME_INFO 1 + +/* Generate .file/.loc directives, so that the assembler generates the + line table. */ +#define DWARF2_ASM_LINE_DEBUG_INFO 1 + +/* Miscellaneous Parameters */ + +#define CASE_VECTOR_MODE HImode +#define WORD_REGISTER_OPERATIONS +#define LOAD_EXTEND_OP(MODE) ((MODE) == QImode ? SIGN_EXTEND : ZERO_EXTEND) +#define MOVE_MAX 4 +#define SHIFT_COUNT_TRUNCATED 1 +#define Pmode HImode +#define FUNCTION_MODE QImode +#define TRULY_NOOP_TRUNCATION(OUTPREC,INPREC) 1 + +#define ASM_LONG ":TODO:.word\t" + +/* Define builtins for selected special-purpose instructions. */ +enum picochip_builtins +{ + PICOCHIP_BUILTIN_SBC, + PICOCHIP_BUILTIN_PUT, + PICOCHIP_BUILTIN_GET, + PICOCHIP_BUILTIN_TESTPORT, + PICOCHIP_BUILTIN_COPYSW, + PICOCHIP_BUILTIN_ADDS, + PICOCHIP_BUILTIN_SUBS, + PICOCHIP_BUILTIN_BREV, + PICOCHIP_BUILTIN_BYTESWAP, + PICOCHIP_BUILTIN_GET_ARRAY, + PICOCHIP_BUILTIN_PUT_ARRAY, + PICOCHIP_BUILTIN_TESTPORT_ARRAY, + PICOCHIP_BUILTIN_ASRI, + PICOCHIP_BUILTIN_PROFILE, + PICOCHIP_BUILTIN_HALT +}; + +#define NO_DOT_IN_LABEL 1 + +/* The assembler does support LEB128, despite the auto-configure test + not detecting this. */ +#define HAVE_AS_LEB128 1 + +/* The End */ |