/* Target Definitions for NVPTX.
Copyright (C) 2014-2020 Free Software Foundation, Inc.
Contributed by Bernd Schmidt <bernds@codesourcery.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/>. */
#ifndef GCC_NVPTX_H
#define GCC_NVPTX_H
#ifndef NVPTX_OPTS_H
#include "config/nvptx/nvptx-opts.h"
#endif
/* Run-time Target. */
#define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
#define ASM_SPEC "%{misa=*:-m %*}"
#define TARGET_CPU_CPP_BUILTINS() \
do \
{ \
builtin_assert ("machine=nvptx"); \
builtin_assert ("cpu=nvptx"); \
builtin_define ("__nvptx__"); \
if (TARGET_SOFT_STACK) \
builtin_define ("__nvptx_softstack__"); \
if (TARGET_UNIFORM_SIMT) \
builtin_define ("__nvptx_unisimt__"); \
} while (0)
/* Avoid the default in ../../gcc.c, which adds "-pthread", which is not
supported for nvptx. */
#define GOMP_SELF_SPECS ""
/* Storage Layout. */
#define BITS_BIG_ENDIAN 0
#define BYTES_BIG_ENDIAN 0
#define WORDS_BIG_ENDIAN 0
/* Chosen such that we won't have to deal with multi-word subregs. */
#define UNITS_PER_WORD 8
/* Alignments in bits. */
#define PARM_BOUNDARY 32
#define STACK_BOUNDARY 128
#define FUNCTION_BOUNDARY 32
#define BIGGEST_ALIGNMENT 128
#define STRICT_ALIGNMENT 1
#define MAX_STACK_ALIGNMENT (1024 * 8)
#define DATA_ALIGNMENT nvptx_data_alignment
/* Copied from elf.h and other places. We'd otherwise use
BIGGEST_ALIGNMENT and fail a number of testcases. */
#define MAX_OFILE_ALIGNMENT (32768 * 8)
/* Type Layout. */
#define DEFAULT_SIGNED_CHAR 1
#define SHORT_TYPE_SIZE 16
#define INT_TYPE_SIZE 32
#define LONG_TYPE_SIZE (TARGET_ABI64 ? 64 : 32)
#define LONG_LONG_TYPE_SIZE 64
#define FLOAT_TYPE_SIZE 32
#define DOUBLE_TYPE_SIZE 64
#define LONG_DOUBLE_TYPE_SIZE 64
#define TARGET_SUPPORTS_WIDE_INT 1
#undef SIZE_TYPE
#define SIZE_TYPE (TARGET_ABI64 ? "long unsigned int" : "unsigned int")
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_ABI64 ? "long int" : "int")
#define POINTER_SIZE (TARGET_ABI64 ? 64 : 32)
#define Pmode (TARGET_ABI64 ? DImode : SImode)
#define STACK_SIZE_MODE Pmode
#define TARGET_SM35 (ptx_isa_option >= PTX_ISA_SM35)
/* Registers. Since ptx is a virtual target, we just define a few
hard registers for special purposes and leave pseudos unallocated.
We have to have some available hard registers, to keep gcc setup
happy. */
#define FIRST_PSEUDO_REGISTER 16
#define FIXED_REGISTERS { 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
#define CALL_USED_REGISTERS { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
/* Register Classes. */
enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES };
#define REG_CLASS_NAMES { "NO_REGS", "ALL_REGS" }
#define REG_CLASS_CONTENTS { { 0x0000 }, { 0xFFFF } }
#define N_REG_CLASSES (int) LIM_REG_CLASSES
#define GENERAL_REGS ALL_REGS
#define REGNO_REG_CLASS(R) ((void)(R), ALL_REGS)
#define BASE_REG_CLASS ALL_REGS
#define INDEX_REG_CLASS NO_REGS
#define REGNO_OK_FOR_BASE_P(X) true
#define REGNO_OK_FOR_INDEX_P(X) false
#define CLASS_MAX_NREGS(class, mode) \
((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
if ((MODE) == QImode || (MODE) == HImode) \
{ \
(MODE) = SImode; \
(void)(UNSIGNEDP); \
(void)(TYPE); \
}
/* Stack and Calling. */
#define FRAME_GROWS_DOWNWARD 0
#define STACK_GROWS_DOWNWARD 1
#define NVPTX_RETURN_REGNUM 0
#define STACK_POINTER_REGNUM 1
#define FRAME_POINTER_REGNUM 2
#define ARG_POINTER_REGNUM 3
#define STATIC_CHAIN_REGNUM 4
/* This register points to the shared memory location with the current warp's
soft stack pointer (__nvptx_stacks[tid.y]). */
#define SOFTSTACK_SLOT_REGNUM 5
/* This register is used to save the previous value of the soft stack pointer
in the prologue and restore it when returning. */
#define SOFTSTACK_PREV_REGNUM 6
#define REGISTER_NAMES \
{ \
"%value", "%stack", "%frame", "%args", \
"%chain", "%sspslot", "%sspprev", "%hr7", \
"%hr8", "%hr9", "%hr10", "%hr11", "%hr12", "%hr13", "%hr14", "%hr15" \
}
#define FIRST_PARM_OFFSET(FNDECL) ((void)(FNDECL), 0)
#define PUSH_ARGS_REVERSED 1
#define ACCUMULATE_OUTGOING_ARGS 1
/* Avoid using the argument pointer for frame-related things. */
#define FRAME_POINTER_CFA_OFFSET(FNDECL) ((void)(FNDECL), 0)
#ifdef HOST_WIDE_INT
struct nvptx_args {
tree fntype;
/* Number of arguments passed in registers so far. */
int count;
};
#endif
#define CUMULATIVE_ARGS struct nvptx_args
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
((CUM).fntype = (FNTYPE), (CUM).count = 0, (void)0)
#define FUNCTION_ARG_REGNO_P(r) 0
#define DEFAULT_PCC_STRUCT_RETURN 0
#define FUNCTION_PROFILER(file, labelno) \
fatal_error (input_location, \
"profiling is not yet implemented for this architecture")
#define TRAMPOLINE_SIZE 32
#define TRAMPOLINE_ALIGNMENT 256
/* We don't run reload, so this isn't actually used, but it still needs to be
defined. Showing an argp->fp elimination also stops
expand_builtin_setjmp_receiver from generating invalid insns. */
#define ELIMINABLE_REGS \
{ \
{ ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM} \
}
/* Define the offset between two registers, one to be eliminated, and the other
its replacement, at the start of a routine. */
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
((OFFSET) = 0)
/* Addressing Modes. */
#define MAX_REGS_PER_ADDRESS 1
#define LEGITIMATE_PIC_OPERAND_P(X) 1
#if defined HOST_WIDE_INT
struct GTY(()) machine_function
{
rtx_expr_list *call_args; /* Arg list for the current call. */
bool doing_call; /* Within a CALL_ARGS ... CALL_ARGS_END sequence. */
bool is_varadic; /* This call is varadic */
bool has_varadic; /* Current function has a varadic call. */
bool has_chain; /* Current function has outgoing static chain. */
bool has_softstack; /* Current function has a soft stack frame. */
bool has_simtreg; /* Current function has an OpenMP SIMD region. */
int num_args; /* Number of args of current call. */
int return_mode; /* Return mode of current fn.
(machine_mode not defined yet.) */
rtx axis_predicate[2]; /* Neutering predicates. */
int axis_dim[2]; /* Maximum number of threads on each axis, dim[0] is
vector_length, dim[1] is num_workers. */
bool axis_dim_init_p;
rtx bcast_partition; /* Register containing the size of each
vector's partition of share-memory used to
broadcast state. */
rtx red_partition; /* Similar to bcast_partition, except for vector
reductions. */
rtx sync_bar; /* Synchronization barrier ID for vectors. */
rtx unisimt_master; /* 'Master lane index' for -muniform-simt. */
rtx unisimt_predicate; /* Predicate for -muniform-simt. */
rtx unisimt_location; /* Mask location for -muniform-simt. */
/* The following two fields hold the maximum size resp. alignment required
for per-lane storage in OpenMP SIMD regions. */
unsigned HOST_WIDE_INT simt_stack_size;
unsigned HOST_WIDE_INT simt_stack_align;
};
#endif
/* Costs. */
#define NO_FUNCTION_CSE 1
#define SLOW_BYTE_ACCESS 0
#define BRANCH_COST(speed_p, predictable_p) 6
/* Assembler Format. */
#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
nvptx_declare_function_name (FILE, NAME, DECL)
#undef ASM_DECLARE_FUNCTION_SIZE
#define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
nvptx_function_end (STREAM)
#define DWARF2_ASM_LINE_DEBUG_INFO 1
#undef ASM_APP_ON
#define ASM_APP_ON "\t// #APP \n"
#undef ASM_APP_OFF
#define ASM_APP_OFF "\t// #NO_APP \n"
#define DBX_REGISTER_NUMBER(N) N
#define TEXT_SECTION_ASM_OP ""
#define DATA_SECTION_ASM_OP ""
#undef ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
do \
{ \
char *__p; \
__p = stpcpy (&(LABEL)[1], PREFIX); \
(LABEL)[0] = '$'; \
sprint_ul (__p, (unsigned long) (NUM)); \
} \
while (0)
#define ASM_OUTPUT_ALIGN(FILE, POWER) \
do \
{ \
(void) (FILE); \
(void) (POWER); \
} \
while (0)
#define ASM_OUTPUT_SKIP(FILE, N) \
nvptx_output_skip (FILE, N)
#undef ASM_OUTPUT_ASCII
#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
nvptx_output_ascii (FILE, STR, LENGTH);
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
nvptx_declare_object_name (FILE, NAME, DECL)
#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
nvptx_output_aligned_decl (FILE, NAME, DECL, SIZE, ALIGN)
#undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
nvptx_output_aligned_decl (FILE, NAME, DECL, SIZE, ALIGN)
#define CASE_VECTOR_PC_RELATIVE flag_pic
#define JUMP_TABLES_IN_TEXT_SECTION flag_pic
#define ADDR_VEC_ALIGN(VEC) (JUMP_TABLES_IN_TEXT_SECTION ? 5 : 2)
/* Misc. */
#define DWARF2_LINENO_DEBUGGING_INFO 1
#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
((VALUE) = GET_MODE_BITSIZE ((MODE)), 2)
#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
((VALUE) = GET_MODE_BITSIZE ((MODE)), 2)
#define SUPPORTS_WEAK 1
#define NO_DOT_IN_LABEL
#define ASM_COMMENT_START "//"
#define STORE_FLAG_VALUE -1
#define FLOAT_STORE_FLAG_VALUE(MODE) REAL_VALUE_ATOF("1.0", (MODE))
#define CASE_VECTOR_MODE SImode
#define MOVE_MAX 8
#define MOVE_RATIO(SPEED) 4
#define FUNCTION_MODE QImode
#define HAS_INIT_SECTION 1
/* The C++ front end insists to link against libstdc++ -- which we don't build.
Tell it to instead link against the innocuous libgcc. */
#define LIBSTDCXX "gcc"
#endif /* GCC_NVPTX_H */