Symbol: X86_REX_X
arch/x86/lib/insn-eval.c
1708
x3 = !!X86_REX_X(rex);
arch/x86/lib/insn-eval.c
483
if (X86_REX_X(insn->rex_prefix.value))
tools/objtool/arch/x86/decode.c
260
rex_x = X86_REX_X(rex) >> 1;