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ir_constant_expression: Add support for ir_binop_min and ir_binop_max.

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These now work on scalar/vector combos. Semantically, if a is a scalar,
min(a, vec2(x,y)) == vec2(min(a,x), min(a,y))
This commit is contained in:
Kenneth Graunke
2010-07-09 11:53:56 -07:00
parent 891a0647e4
commit 79fed377f4
1 changed files with 47 additions and 0 deletions
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47
src/glsl/ir_constant_expression.cpp
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@@ -38,6 +38,9 @@
#include "ir_visitor.h"
#include "glsl_types.h"
#define min(x,y) (x) < (y) ? (x) : (y)
#define max(x,y) (x) > (y) ? (x) : (y)
/**
* Visitor class for evaluating constant expressions
*/
@@ -413,6 +416,50 @@ ir_constant_visitor::visit(ir_expression *ir)
}
}
break;
case ir_binop_min:
assert(op[0]->type == op[1]->type || op0_scalar || op1_scalar);
for (unsigned c = 0, c0 = 0, c1 = 0;
c < components;
c0 += c0_inc, c1 += c1_inc, c++) {
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
data.u[c] = min(op[0]->value.u[c0], op[1]->value.u[c1]);
break;
case GLSL_TYPE_INT:
data.i[c] = min(op[0]->value.i[c0], op[1]->value.i[c1]);
break;
case GLSL_TYPE_FLOAT:
data.f[c] = min(op[0]->value.f[c0], op[1]->value.f[c1]);
break;
default:
assert(0);
}
}
break;
case ir_binop_max:
assert(op[0]->type == op[1]->type || op0_scalar || op1_scalar);
for (unsigned c = 0, c0 = 0, c1 = 0;
c < components;
c0 += c0_inc, c1 += c1_inc, c++) {
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
data.u[c] = max(op[0]->value.u[c0], op[1]->value.u[c1]);
break;
case GLSL_TYPE_INT:
data.i[c] = max(op[0]->value.i[c0], op[1]->value.i[c1]);
break;
case GLSL_TYPE_FLOAT:
data.f[c] = max(op[0]->value.f[c0], op[1]->value.f[c1]);
break;
default:
assert(0);
}
}
break;
case ir_binop_add:
assert(op[0]->type == op[1]->type || op0_scalar || op1_scalar);