ir_expression *fma(operand a, operand b, operand c);
ir_expression *lrp(operand x, operand y, operand a);
ir_expression *csel(operand a, operand b, operand c);
+ir_expression *bitfield_extract(operand a, operand b, operand c);
ir_expression *bitfield_insert(operand a, operand b, operand c, operand d);
ir_swizzle *swizzle(operand a, int swizzle, int components);