contrib/gcc/jump.c

367 /* Given a comparison (CODE ARG0 ARG1), inside an insn, INSN, return a code
368    of reversed comparison if it is possible to do so.  Otherwise return UNKNOWN.
370    know whether it's source is floating point or integer comparison.  Machine
378   /* If this is not actually a comparison, we can't reverse it.  */
388      comparison.  Give it priority over everything else to allow
399   /* Try a few special cases based on the comparison code.  */
416       /* In case we already see unordered comparison, we can be sure to
432       /* Try to search for the comparison to determine the real mode.
451 		  rtx comparison = src;
455 		    mode = GET_MODE (XEXP (comparison, 1));
473   /* Test for an integer condition, or a floating-point comparison
487 reversed_comparison_code (rtx comparison, rtx insn)
489   if (!COMPARISON_P (comparison))
491   return reversed_comparison_code_parts (GET_CODE (comparison),
492 					 XEXP (comparison, 0),
493 					 XEXP (comparison, 1), insn);
496 /* Return comparison with reversed code of EXP.
511 /* Given an rtx-code for a comparison, return the code for the negated
512    comparison.  If no such code exists, return UNKNOWN.
515    be acting on the results of an IEEE floating point comparison, because
605 /* Similar, but return the code when two operands of a comparison are swapped.
651 /* Given a comparison CODE, return the corresponding unsigned comparison.
652    If CODE is an equality comparison or already an unsigned comparison,
682 /* Similarly, return the signed version of a comparison.  */
718   /* UNKNOWN comparison codes can happen as a result of trying to revert
719      comparison codes.
1736 	 be done if this is not an integer comparison, is to reverse
1737 	 the comparison code.  Otherwise, swap the THEN-part and ELSE-part