[LLVMbugs] [Bug 22519] New: cntlz assembler alias not supported

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Feb 9 09:41:06 PST 2015


            Bug ID: 22519
           Summary: cntlz assembler alias not supported
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: PowerPC
          Assignee: unassignedbugs at nondot.org
          Reporter: echristo at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

gas supports it, we don't. People use it in inline asm. Blah blah blah.

int foo(uint32_t a) {
  int32_t x;
  asm("cntlz %0,%1" : "=r"(x) : "r"(a));
  return x;

or something.

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