[M3devel] Target.Structure_size_boundary?
Jay K
jay.krell at cornell.edu
Fri Aug 14 22:43:18 CEST 2015
air:src jay$ grep -i boundary *
Target.i3: boundary (i.e. (size + align - 1) DIV align * align).Target.i3: Structure_size_boundary: CARDINAL;Target.i3-old: boundary (i.e. (size + align - 1) DIV align * align).Target.i3-old: Structure_size_boundary: CARDINAL;Target.m3: Structure_size_boundary := 8;Target.m3: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 8;Target.m3-old: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 32;Target.m3-old: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 32;Target.m3-old: Structure_size_boundary := 16;Target.m3-old: Structure_size_boundary := 32;Target.m3-old: Structure_size_boundary := 16;TargetT.i3: structure_size_boundary: CARDINAL;
Surely we can just consider this 8 and remove all of it uses?
Are all those old >8 uses even correct?
sizeof(struct {char a;}) really isn't always 1? sizeof(struct {char a[3];}) really isn't always 3?
Actually we can verify this easily enough with a cross gcc w/o cross driver/linker/assembler/headers/libraries.I'll do that later.
Plus, we can have the C code statically verify struct sizes agreebetween front end backend, as long as they get encoded anywhere by frontend.
You know, I want to limit Target.m3 to endian and word size. Even those I wish I could remove.
Thanks, - Jay
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