forked from OSchip/llvm-project
256 lines
6.4 KiB
C
256 lines
6.4 KiB
C
/*
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* Copyright 2012 Ecole Normale Superieure
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*
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* Use of this software is governed by the MIT license
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*
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* Written by Sven Verdoolaege,
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* Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
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*/
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#include <string.h>
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#include <isl/aff.h>
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#include "gpu_print.h"
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#include "print.h"
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#include "schedule.h"
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/* Print declarations to "p" for arrays that are local to "prog"
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* but that are used on the host and therefore require a declaration.
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*/
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__isl_give isl_printer *gpu_print_local_declarations(__isl_take isl_printer *p,
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struct gpu_prog *prog)
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{
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int i;
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isl_ast_build *build;
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if (!prog)
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return isl_printer_free(p);
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build = isl_ast_build_from_context(isl_set_copy(prog->scop->context));
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for (i = 0; i < prog->n_array; ++i) {
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if (!prog->array[i].declare_local)
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continue;
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p = ppcg_print_declaration(p, prog->scop->pet->arrays[i],
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build);
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}
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isl_ast_build_free(build);
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return p;
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}
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/* Print an expression for the size of "array" in bytes.
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*/
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__isl_give isl_printer *gpu_array_info_print_size(__isl_take isl_printer *prn,
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struct gpu_array_info *array)
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{
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int i;
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for (i = 0; i < array->n_index; ++i) {
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prn = isl_printer_print_str(prn, "(");
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prn = isl_printer_print_pw_aff(prn, array->bound[i]);
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prn = isl_printer_print_str(prn, ") * ");
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}
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prn = isl_printer_print_str(prn, "sizeof(");
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prn = isl_printer_print_str(prn, array->type);
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prn = isl_printer_print_str(prn, ")");
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return prn;
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}
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/* Print the declaration of a non-linearized array argument.
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*/
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static __isl_give isl_printer *print_non_linearized_declaration_argument(
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__isl_take isl_printer *p, struct gpu_array_info *array)
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{
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int i;
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p = isl_printer_print_str(p, array->type);
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p = isl_printer_print_str(p, " ");
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p = isl_printer_print_str(p, array->name);
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for (i = 0; i < array->n_index; i++) {
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p = isl_printer_print_str(p, "[");
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p = isl_printer_print_pw_aff(p, array->bound[i]);
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p = isl_printer_print_str(p, "]");
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}
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return p;
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}
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/* Print the declaration of an array argument.
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* "memory_space" allows to specify a memory space prefix.
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*/
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__isl_give isl_printer *gpu_array_info_print_declaration_argument(
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__isl_take isl_printer *p, struct gpu_array_info *array,
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const char *memory_space)
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{
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if (gpu_array_is_read_only_scalar(array)) {
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p = isl_printer_print_str(p, array->type);
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p = isl_printer_print_str(p, " ");
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p = isl_printer_print_str(p, array->name);
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return p;
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}
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if (memory_space) {
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p = isl_printer_print_str(p, memory_space);
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p = isl_printer_print_str(p, " ");
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}
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if (array->n_index != 0 && !array->linearize)
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return print_non_linearized_declaration_argument(p, array);
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p = isl_printer_print_str(p, array->type);
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p = isl_printer_print_str(p, " ");
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p = isl_printer_print_str(p, "*");
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p = isl_printer_print_str(p, array->name);
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return p;
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}
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/* Print the call of an array argument.
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*/
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__isl_give isl_printer *gpu_array_info_print_call_argument(
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__isl_take isl_printer *p, struct gpu_array_info *array)
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{
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if (gpu_array_is_read_only_scalar(array))
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return isl_printer_print_str(p, array->name);
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p = isl_printer_print_str(p, "dev_");
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p = isl_printer_print_str(p, array->name);
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return p;
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}
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/* Print an access to the element in the private/shared memory copy
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* described by "stmt". The index of the copy is recorded in
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* stmt->local_index as an access to the array.
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*/
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static __isl_give isl_printer *stmt_print_local_index(__isl_take isl_printer *p,
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struct ppcg_kernel_stmt *stmt)
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{
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return isl_printer_print_ast_expr(p, stmt->u.c.local_index);
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}
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/* Print an access to the element in the global memory copy
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* described by "stmt". The index of the copy is recorded in
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* stmt->index as an access to the array.
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*
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* The copy in global memory has been linearized, so we need to take
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* the array size into account.
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*/
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static __isl_give isl_printer *stmt_print_global_index(
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__isl_take isl_printer *p, struct ppcg_kernel_stmt *stmt)
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{
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int i;
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struct gpu_array_info *array = stmt->u.c.array;
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struct gpu_local_array_info *local = stmt->u.c.local_array;
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isl_ast_expr *index;
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if (gpu_array_is_scalar(array)) {
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if (!gpu_array_is_read_only_scalar(array))
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p = isl_printer_print_str(p, "*");
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p = isl_printer_print_str(p, array->name);
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return p;
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}
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index = isl_ast_expr_copy(stmt->u.c.index);
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if (array->linearize)
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index = gpu_local_array_info_linearize_index(local, index);
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p = isl_printer_print_ast_expr(p, index);
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isl_ast_expr_free(index);
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return p;
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}
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/* Print a copy statement.
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*
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* A read copy statement is printed as
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*
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* local = global;
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*
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* while a write copy statement is printed as
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*
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* global = local;
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*/
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__isl_give isl_printer *ppcg_kernel_print_copy(__isl_take isl_printer *p,
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struct ppcg_kernel_stmt *stmt)
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{
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p = isl_printer_start_line(p);
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if (stmt->u.c.read) {
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p = stmt_print_local_index(p, stmt);
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p = isl_printer_print_str(p, " = ");
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p = stmt_print_global_index(p, stmt);
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} else {
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p = stmt_print_global_index(p, stmt);
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p = isl_printer_print_str(p, " = ");
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p = stmt_print_local_index(p, stmt);
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}
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p = isl_printer_print_str(p, ";");
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p = isl_printer_end_line(p);
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return p;
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}
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__isl_give isl_printer *ppcg_kernel_print_domain(__isl_take isl_printer *p,
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struct ppcg_kernel_stmt *stmt)
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{
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return pet_stmt_print_body(stmt->u.d.stmt->stmt, p, stmt->u.d.ref2expr);
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}
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/* Was the definition of "type" printed before?
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* That is, does its name appear in the list of printed types "types"?
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*/
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static int already_printed(struct gpu_types *types,
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struct pet_type *type)
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{
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int i;
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for (i = 0; i < types->n; ++i)
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if (!strcmp(types->name[i], type->name))
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return 1;
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return 0;
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}
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/* Print the definitions of all types prog->scop that have not been
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* printed before (according to "types") on "p".
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* Extend the list of printed types "types" with the newly printed types.
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*/
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__isl_give isl_printer *gpu_print_types(__isl_take isl_printer *p,
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struct gpu_types *types, struct gpu_prog *prog)
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{
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int i, n;
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isl_ctx *ctx;
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char **name;
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n = prog->scop->pet->n_type;
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if (n == 0)
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return p;
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ctx = isl_printer_get_ctx(p);
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name = isl_realloc_array(ctx, types->name, char *, types->n + n);
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if (!name)
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return isl_printer_free(p);
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types->name = name;
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for (i = 0; i < n; ++i) {
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struct pet_type *type = prog->scop->pet->types[i];
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if (already_printed(types, type))
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continue;
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p = isl_printer_start_line(p);
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p = isl_printer_print_str(p, type->definition);
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p = isl_printer_print_str(p, ";");
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p = isl_printer_end_line(p);
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types->name[types->n++] = strdup(type->name);
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}
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return p;
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}
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