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Add ir_constant_expression.cpp support for <, >, <=, >=.

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This results in folding one more constant expression in CorrectParse2.frag.
This commit is contained in:
Eric Anholt 2010-04-06 09:55:45 -07:00
parent 62735694a1
commit 85171c2dd8
1 changed files with 66 additions and 0 deletions
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66
ir_constant_expression.cpp
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@ -252,6 +252,72 @@ ir_constant_visitor::visit(ir_expression *ir)
for (c = 0; c < ir->operands[0]->type->components(); c++)
b[c] = op[0]->value.b[c] || op[1]->value.b[c];
break;
case ir_binop_less:
type = glsl_type::bool_type;
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
b[0] = op[0]->value.u[0] < op[1]->value.u[0];
break;
case GLSL_TYPE_INT:
b[0] = op[0]->value.i[0] < op[1]->value.i[0];
break;
case GLSL_TYPE_FLOAT:
b[0] = op[0]->value.f[0] < op[1]->value.f[0];
break;
default:
assert(0);
}
break;
case ir_binop_greater:
type = glsl_type::bool_type;
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
b[0] = op[0]->value.u[0] > op[1]->value.u[0];
break;
case GLSL_TYPE_INT:
b[0] = op[0]->value.i[0] > op[1]->value.i[0];
break;
case GLSL_TYPE_FLOAT:
b[0] = op[0]->value.f[0] > op[1]->value.f[0];
break;
default:
assert(0);
}
break;
case ir_binop_lequal:
type = glsl_type::bool_type;
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
b[0] = op[0]->value.u[0] <= op[1]->value.u[0];
break;
case GLSL_TYPE_INT:
b[0] = op[0]->value.i[0] <= op[1]->value.i[0];
break;
case GLSL_TYPE_FLOAT:
b[0] = op[0]->value.f[0] <= op[1]->value.f[0];
break;
default:
assert(0);
}
break;
case ir_binop_gequal:
type = glsl_type::bool_type;
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
b[0] = op[0]->value.u[0] >= op[1]->value.u[0];
break;
case GLSL_TYPE_INT:
b[0] = op[0]->value.i[0] >= op[1]->value.i[0];
break;
case GLSL_TYPE_FLOAT:
b[0] = op[0]->value.f[0] >= op[1]->value.f[0];
break;
default:
assert(0);
}
break;
default:
break;
}