Blush... Obvious mistake ... I looked at the 18 failures I currently have when running the following testcase (not yet approved): http://sources.redhat.com/ml/gdb-patches/2005-05/msg00546.html It turns out it was an obvious confusion between the register number embedded in the instruction, and hte register number as GDB knows it. Say for instance we have a conditional branch instruction on f16, right now we read register number 16, which is register a0, not f16! The fix I just committed seemed to be improving things, but only by chance :-/. With the attached patch, all tests now PASS. 2005-05-26 Joel Brobecker * alpha-tdep.c (alpha_next_pc): Use correct register number for floating-point branch instructions. Tested on alpha-tru64 5.1a. No regression, fixes all 18 failures observed in alpha-step.exp. OK to apply? -- Joel