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ir_constant_expression: Add support for the "clamp" builtin.

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This commit is contained in:
Kenneth Graunke
2010-07-21 22:23:17 -07:00
parent ff58b7c9b6
commit a4ca1cfb66
1 changed files with 24 additions and 1 deletions
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25
src/glsl/ir_constant_expression.cpp
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@@ -836,7 +836,30 @@ ir_call::constant_expression_value()
} else if (strcmp(callee, "ceil") == 0) {
expr = new(mem_ctx) ir_expression(ir_unop_ceil, type, op[0], NULL);
} else if (strcmp(callee, "clamp") == 0) {
return NULL; /* FINISHME: implement this */
assert(num_parameters == 3);
unsigned c1_inc = op[1]->type->is_scalar() ? 0 : 1;
unsigned c2_inc = op[2]->type->is_scalar() ? 0 : 1;
for (unsigned c = 0, c1 = 0, c2 = 0;
c < op[0]->type->components();
c1 += c1_inc, c2 += c2_inc, c++) {
switch (op[0]->type->base_type) {
case GLSL_TYPE_UINT:
data.u[c] = CLAMP(op[0]->value.u[c], op[1]->value.u[c1],
op[2]->value.u[c2]);
break;
case GLSL_TYPE_INT:
data.i[c] = CLAMP(op[0]->value.i[c], op[1]->value.i[c1],
op[2]->value.u[c2]);
break;
case GLSL_TYPE_FLOAT:
data.f[c] = CLAMP(op[0]->value.f[c], op[1]->value.f[c1],
op[2]->value.f[c2]);
break;
default:
assert(!"Should not get here.");
}
}
} else if (strcmp(callee, "cos") == 0) {
expr = new(mem_ctx) ir_expression(ir_unop_cos, type, op[0], NULL);
} else if (strcmp(callee, "cosh") == 0) {