diff options
| -rw-r--r-- | src/glsl/ir_constant_expression.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp index c939690129a..5485d79a88f 100644 --- a/src/glsl/ir_constant_expression.cpp +++ b/src/glsl/ir_constant_expression.cpp @@ -1045,7 +1045,11 @@ ir_call::constant_expression_value() } else if (strcmp(callee, "sqrt") == 0) { expr = new(mem_ctx) ir_expression(ir_unop_sqrt, type, op[0], NULL); } else if (strcmp(callee, "step") == 0) { - return NULL; /* FINISHME: implement this */ + assert(op[0]->type->is_float() && op[1]->type->is_float()); + /* op[0] (edge) may be either a scalar or a vector */ + const unsigned c0_inc = op[0]->type->is_scalar() ? 0 : 1; + for (unsigned c = 0, c0 = 0; c < type->components(); c0 += c0_inc, c++) + data.f[c] = (op[1]->value.f[c] < op[0]->value.f[c0]) ? 0.0 : 1.0; } else if (strcmp(callee, "tan") == 0) { assert(op[0]->type->is_float()); for (unsigned c = 0; c < op[0]->type->components(); c++) |