search for: regaltnameindex

Displaying 2 results from an estimated 2 matches for "regaltnameindex".

2015 Aug 31
2
MCRegisterClass mandatory vs preferred alignment?
On 08/31/2015 03:59 PM, Matthias Braun wrote: > Looks to me like the alignment is specified in tablegen. From Target.td: > > class RegisterClass<string namespace, list<ValueType> regTypes, int alignment, > dag regList, RegAltNameIndex idx = NoRegAltName> > > X86RegisterInfo.td: > > def VR256 : RegisterClass<"X86", [v32i8, v16i16, v8i32, v4i64, v8f32, v4f64], > 256, (sequence "YMM%u", 0, 15)>; > def VR256X : RegisterClass<"X86", [v32i8, v16i16,...
2015 Aug 31
3
MCRegisterClass mandatory vs preferred alignment?
Looking around today, it appears that TargetRegisterClass and MCRegisterClass only includes a single alignment. This is documented as being the minimum legal alignment, but it appears to often be greater than this in practice. For instance, on x86 the alignment of %ymm0 is listed as 32, not 1. Does anyone know why this is? Additionally, where are these alignments actually defined? I