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glsl: Rework ir_reader to handle expressions with three operands.

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Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Kenneth Graunke
2012-12-01 23:49:19 -08:00
committed by Matt Turner
parent 1afd33ec05
commit 18281d6088
1 changed files with 19 additions and 26 deletions
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45
src/glsl/ir_reader.cpp
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@@ -676,15 +676,16 @@ ir_reader::read_expression(s_expression *expr)
{
s_expression *s_type;
s_symbol *s_op;
s_expression *s_arg1;
s_expression *s_arg[3];
s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };
s_pattern pat[] = { "expression", s_type, s_op, s_arg[0] };
if (!PARTIAL_MATCH(expr, pat)) {
ir_read_error(expr, "expected (expression <type> <operator> "
"<operand> [<operand>])");
return NULL;
}
s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel
s_arg[1] = (s_expression *) s_arg[0]->next; // may be tail sentinel
s_arg[2] = (s_expression *) s_arg[1]->next; // may be tail sentinel or NULL
const glsl_type *type = read_type(s_type);
if (type == NULL)
@@ -697,35 +698,27 @@ ir_reader::read_expression(s_expression *expr)
return NULL;
}
unsigned num_operands = ir_expression::get_num_operands(op);
if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {
ir_read_error(expr, "expected (expression <type> %s <operand>)",
s_op->value());
int num_operands = -3; /* skip "expression" <type> <operation> */
foreach_list(n, &((s_list *) expr)->subexpressions)
++num_operands;
int expected_operands = ir_expression::get_num_operands(op);
if (num_operands != expected_operands) {
ir_read_error(expr, "found %d expression operands, expected %d",
num_operands, expected_operands);
return NULL;
}
ir_rvalue *arg1 = read_rvalue(s_arg1);
ir_rvalue *arg2 = NULL;
if (arg1 == NULL) {
ir_read_error(NULL, "when reading first operand of %s", s_op->value());
return NULL;
}
if (num_operands == 2) {
if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {
ir_read_error(expr, "expected (expression <type> %s <operand> "
"<operand>)", s_op->value());
return NULL;
}
arg2 = read_rvalue(s_arg2);
if (arg2 == NULL) {
ir_read_error(NULL, "when reading second operand of %s",
s_op->value());
return NULL;
ir_rvalue *arg[3] = {NULL, NULL, NULL};
for (int i = 0; i < num_operands; i++) {
arg[i] = read_rvalue(s_arg[i]);
if (arg[i] == NULL) {
ir_read_error(NULL, "when reading operand #%d of %s", i, s_op->value());
return NULL;
}
}
return new(mem_ctx) ir_expression(op, type, arg1, arg2);
return new(mem_ctx) ir_expression(op, type, arg[0], arg[1], arg[2]);
}
ir_swizzle *