+ case opid3('<', '=', '>'): /* -1, 0, or 1 */
+ if (NotSameType(TYPE_FLOAT)) {
+ ast_type_to_string(exprs[0], ty1, sizeof(ty1));
+ ast_type_to_string(exprs[1], ty2, sizeof(ty2));
+ compile_error(ctx, "invalid types used in comparision: %s and %s",
+ ty1, ty2);
+
+ return false;
+ }
+
+ if (CanConstFold(exprs[0], exprs[1])) {
+ if (ConstF(0) < ConstF(1))
+ out = (ast_expression*)parser_const_float_neg1(parser);
+ else if (ConstF(0) == ConstF(1))
+ out = (ast_expression*)parser_const_float_0(parser);
+ else if (ConstF(0) > ConstF(1))
+ out = (ast_expression*)parser_const_float_1(parser);
+ } else {
+ /* if (lt) { */
+ out = (ast_expression*)ast_ternary_new(ctx,
+ (ast_expression*)ast_binary_new(ctx, INSTR_LT, exprs[0], exprs[1]),
+
+ /* out = -1 */
+ (ast_expression*)parser_const_float_neg1(parser),
+
+ /* } else { */
+ /* if (eq) { */
+ (ast_expression*)ast_ternary_new(ctx,
+ (ast_expression*)ast_binary_new(ctx, INSTR_EQ_F, exprs[0], exprs[1]),
+
+ /* out = 0 */
+ (ast_expression*)parser_const_float_0(parser),
+
+ /* } else { */
+
+ /* out = 1 */
+ (ast_expression*)parser_const_float_1(parser)
+ /* } */
+ )
+ /* } */
+ );
+
+ }
+ break;
+