https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118480
--- Comment #15 from Segher Boessenkool <segher at gcc dot gnu.org> --- (In reply to Steven Munroe from comment #12) > Also from PowerISA 3.1C > > The result is placed into VSR[VRT+32], except if, for any > byte element in VSR[VRB+32], the low-order 3 bits are not > equal to the shift amount, then VSR[VRT+32] is undefined. > > "undefined" but not "boundedly undefined" On pretty much all implementations the vsl insn actually behaves exactly like vslv. But yeah, the description literally says "UNDEFINED", hrm. > Weird. Have to ask the ISA Architects about that. Please do. > Implies even modern implementations may require the bit shift byte splat for > vsl/vsr. Yeah, I must have misread.
