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Function dmd.backend.x86.code_x86.modregrm
Macros to ease generating code
ubyte modregrm(
uint m,
uint r,
uint rm
) nothrow @safe;
modregrm
generate mod reg r/m field
modregxrm
reg could be R8..R15
modregrmx
rm could be R8..R15
modregxrmx
reg or rm could be R8..R15
NEWREG
change reg field of x to r
genorreg
OR t,f
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