"Sivaprasad.pv" <sivaprasad.pv@xxxxxxxxxxxxxxxxxx> writes: > While updating the machine description file for our architecture ,we > encountered the problem regarding conditional based transfer. > In gcc internals specified that conditional based transfer can be > supported using the standard pattern 'movModecc' as shown below. > op0=(cc)? op2:op3 > But our architecture supports conditional transfer instruction as > shown below: > T<CC> op1, op2 It transfers the op1 to op2 if the <CC> > is true otherwise it should behave like 'nop' . > would u people tell me ,how to define the pattern in machine > description file regarding the above specified issue. Use a "0" constraint to force one of the operands to be in the same location as operand 0. See the i386 movsicc_nocc insn for an example. Ian
