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-rw-r--r--src/arch/x86/isa/bitfields.isa1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/arch/x86/isa/bitfields.isa b/src/arch/x86/isa/bitfields.isa
index 43fee5fef..fb082f683 100644
--- a/src/arch/x86/isa/bitfields.isa
+++ b/src/arch/x86/isa/bitfields.isa
@@ -60,6 +60,7 @@
//REX prefix
def bitfield REX rex;
+def bitfield REX_PRESENT rex.present;
def bitfield REX_W rex.w;
def bitfield REX_R rex.r;
def bitfield REX_X rex.x;