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mesa: glsl: put var emit/ref code into separate functions

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This commit is contained in:
Brian Paul
2008-08-19 10:05:11 -06:00
parent 146a0fba00
commit df9bd01ea0
1 changed files with 81 additions and 53 deletions
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134
src/mesa/shader/slang/slang_emit.c
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@@ -1636,6 +1636,84 @@ emit_struct_field(slang_emit_info *emitInfo, slang_ir_node *n)
}
/**
* Emit code for a variable declaration.
* This usually doesn't result in any code generation, but just
* memory allocation.
*/
static struct prog_instruction *
emit_var_decl(slang_emit_info *emitInfo, slang_ir_node *n)
{
struct prog_instruction *inst;
assert(n->Store);
assert(n->Store->File != PROGRAM_UNDEFINED);
assert(n->Store->Size > 0);
/*assert(n->Store->Index < 0);*/
if (!n->Var || n->Var->isTemp) {
/* a nameless/temporary variable, will be freed after first use */
/*NEW*/
if (n->Store->Index < 0 && !_slang_alloc_temp(emitInfo->vt, n->Store)) {
slang_info_log_error(emitInfo->log,
"Ran out of registers, too many temporaries");
return NULL;
}
}
else {
/* a regular variable */
_slang_add_variable(emitInfo->vt, n->Var);
if (!_slang_alloc_var(emitInfo->vt, n->Store)) {
slang_info_log_error(emitInfo->log,
"Ran out of registers, too many variables");
return NULL;
}
/*
printf("IR_VAR_DECL %s %d store %p\n",
(char*) n->Var->a_name, n->Store->Index, (void*) n->Store);
*/
assert(n->Var->aux == n->Store);
}
if (emitInfo->EmitComments) {
/* emit NOP with comment describing the variable's storage location */
char s[1000];
sprintf(s, "TEMP[%d]%s = variable %s (size %d)",
n->Store->Index,
_mesa_swizzle_string(n->Store->Swizzle, 0, GL_FALSE),
(n->Var ? (char *) n->Var->a_name : "anonymous"),
n->Store->Size);
inst = emit_comment(emitInfo, s);
return inst;
}
return NULL;
}
/**
* Emit code for a reference to a variable.
* Actually, no code is generated but we may do some memory alloation.
* In particular, state vars (uniforms) are allocated on an as-needed basis.
*/
static struct prog_instruction *
emit_var_ref(slang_emit_info *emitInfo, slang_ir_node *n)
{
assert(n->Store);
assert(n->Store->File != PROGRAM_UNDEFINED);
if (n->Store->File == PROGRAM_STATE_VAR && n->Store->Index < 0) {
n->Store->Index = _slang_alloc_statevar(n, emitInfo->prog->Parameters);
}
if (n->Store->Index < 0) {
/* probably ran out of registers */
return NULL;
}
assert(n->Store->Size > 0);
return NULL;
}
static struct prog_instruction *
emit(slang_emit_info *emitInfo, slang_ir_node *n)
{
@@ -1671,64 +1749,14 @@ emit(slang_emit_info *emitInfo, slang_ir_node *n)
case IR_VAR_DECL:
/* Variable declaration - allocate a register for it */
assert(n->Store);
assert(n->Store->File != PROGRAM_UNDEFINED);
assert(n->Store->Size > 0);
/*assert(n->Store->Index < 0);*/
if (!n->Var || n->Var->isTemp) {
/* a nameless/temporary variable, will be freed after first use */
/*NEW*/
if (n->Store->Index < 0 && !_slang_alloc_temp(emitInfo->vt, n->Store)) {
slang_info_log_error(emitInfo->log,
"Ran out of registers, too many temporaries");
return NULL;
}
}
else {
/* a regular variable */
_slang_add_variable(emitInfo->vt, n->Var);
if (!_slang_alloc_var(emitInfo->vt, n->Store)) {
slang_info_log_error(emitInfo->log,
"Ran out of registers, too many variables");
return NULL;
}
/*
printf("IR_VAR_DECL %s %d store %p\n",
(char*) n->Var->a_name, n->Store->Index, (void*) n->Store);
*/
assert(n->Var->aux == n->Store);
}
if (emitInfo->EmitComments) {
/* emit NOP with comment describing the variable's storage location */
char s[1000];
sprintf(s, "TEMP[%d]%s = variable %s (size %d)",
n->Store->Index,
_mesa_swizzle_string(n->Store->Swizzle, 0, GL_FALSE),
(n->Var ? (char *) n->Var->a_name : "anonymous"),
n->Store->Size);
inst = emit_comment(emitInfo, s);
return inst;
}
return NULL;
inst = emit_var_decl(emitInfo, n);
return inst;
case IR_VAR:
/* Reference to a variable
* Storage should have already been resolved/allocated.
*/
assert(n->Store);
assert(n->Store->File != PROGRAM_UNDEFINED);
if (n->Store->File == PROGRAM_STATE_VAR &&
n->Store->Index < 0) {
n->Store->Index = _slang_alloc_statevar(n, emitInfo->prog->Parameters);
}
if (n->Store->Index < 0) {
/* probably ran out of registers */
return NULL;
}
assert(n->Store->Size > 0);
break;
return emit_var_ref(emitInfo, n);
case IR_ELEMENT:
return emit_array_element(emitInfo, n);