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/*
* Mesa 3-D graphics library
* Version: 6.3
*
* Copyright (C) 2005 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file slang_assemble_assignment.c
* slang assignment expressions assembler
* \author Michal Krol
*/
#include "imports.h"
#include "slang_assemble_assignment.h"
#include "slang_assemble_typeinfo.h"
#include "slang_storage.h"
#include "slang_utility.h"
/*
_slang_assemble_assignment()
copies values on the stack (<component 0> to <component N-1>) to a memory
location pointed by <addr of variable>;
in:
+------------------+
| addr of variable |
+------------------+
| component N-1 |
| ... |
| component 0 |
+------------------+
out:
+------------------+
| addr of variable |
+------------------+
*/
/* TODO: add support for swizzle mask */
static int assign_aggregate (slang_assembly_file *file, const slang_storage_aggregate *agg,
unsigned int *index, unsigned int size, slang_assembly_local_info *info)
{
unsigned int i;
for (i = 0; i < agg->count; i++)
{
const slang_storage_array *arr = agg->arrays + i;
unsigned int j;
for (j = 0; j < arr->length; j++)
{
if (arr->type == slang_stor_aggregate)
{
if (!assign_aggregate (file, arr->aggregate, index, size, info))
return 0;
}
else
{
slang_assembly_type ty;
switch (arr->type)
{
case slang_stor_bool:
ty = slang_asm_bool_copy;
break;
case slang_stor_int:
ty = slang_asm_int_copy;
break;
case slang_stor_float:
ty = slang_asm_float_copy;
break;
default:
break;
}
if (!slang_assembly_file_push_label2 (file, ty, size - *index, *index))
return 0;
*index += 4;
}
}
}
return 1;
}
int _slang_assemble_assignment (slang_assembly_file *file, slang_operation *op,
slang_assembly_name_space *space, slang_assembly_local_info *info)
{
slang_assembly_typeinfo ti;
int result;
slang_storage_aggregate agg;
unsigned int index, size;
slang_assembly_typeinfo_construct (&ti);
if (!_slang_typeof_operation (op, space, &ti))
{
slang_assembly_typeinfo_destruct (&ti);
return 0;
}
slang_storage_aggregate_construct (&agg);
if (!_slang_aggregate_variable (&agg, &ti.spec, NULL, space->funcs, space->structs))
{
slang_storage_aggregate_destruct (&agg);
slang_assembly_typeinfo_destruct (&ti);
return 0;
}
index = 0;
size = _slang_sizeof_aggregate (&agg);
result = assign_aggregate (file, &agg, &index, size, info);
slang_storage_aggregate_destruct (&agg);
slang_assembly_typeinfo_destruct (&ti);
return result;
}
/*
_slang_assemble_assign()
performs unary (pre ++ and --) or binary (=, +=, -=, *=, /=) assignment on the operation's
children
*/
int dereference (slang_assembly_file *file, slang_operation *op,
slang_assembly_name_space *space, slang_assembly_local_info *info);
int call_function_name (slang_assembly_file *file, const char *name, slang_operation *params,
unsigned int param_count, int assignment, slang_assembly_name_space *space,
slang_assembly_local_info *info);
int _slang_assemble_assign (slang_assembly_file *file, slang_operation *op, const char *oper,
int ref, slang_assembly_name_space *space, slang_assembly_local_info *info)
{
slang_assembly_stack_info stk;
slang_assembly_flow_control flow;
if (!ref)
{
if (!slang_assembly_file_push_label2 (file, slang_asm_local_addr, info->addr_tmp, 4))
return 0;
}
if (slang_string_compare ("=", oper) == 0)
{
if (!_slang_assemble_operation (file, op->children, 1, &flow, space, info, &stk))
return 0;
if (!_slang_assemble_operation (file, op->children + 1, 0, &flow, space, info, &stk))
return 0;
if (!_slang_assemble_assignment (file, op->children, space, info))
return 0;
}
else
{
if (!call_function_name (file, oper, op->children, op->num_children, 1, space, info))
return 0;
}
if (!ref)
{
if (!slang_assembly_file_push (file, slang_asm_addr_copy))
return 0;
if (!slang_assembly_file_push_label (file, slang_asm_local_free, 4))
return 0;
if (!dereference (file, op->children, space, info))
return 0;
}
return 1;
}
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