1 files changed, 56 insertions, 0 deletions
diff --git a/src/bits64/rflags.rs b/src/bits64/rflags.rs
new file mode 100644
index 0000000..7cf4bbd
--- /dev/null
+++ b/src/bits64/rflags.rs
@@ -0,0 +1,56 @@
+//! Description of RFlag values that store the results of operations and the state of the processor.
+
+/// RFLAGS description.
+bitflags! {
+    pub flags RFlags: u64 {
+        /// ID Flag (ID)
+        const RFLAGS_ID   = 1 << 21,
+        /// Virtual Interrupt Pending (VIP)
+        const RFLAGS_VIP  = 1 << 20,
+        /// Virtual Interrupt Flag (VIF)
+        const RFLAGS_VIF  = 1 << 19,
+        /// Alignment Check (AC)
+        const RFLAGS_AC   = 1 << 18,
+        /// Virtual-8086 Mode (VM)
+        const RFLAGS_VM   = 1 << 17,
+        /// Resume Flag (RF)
+        const RFLAGS_RF   = 1 << 16,
+        /// Nested Task (NT)
+        const RFLAGS_NT   = 1 << 14,
+        /// I/O Privilege Level (IOPL) 0
+        const RFLAGS_IOPL0 = 0 << 12,
+        /// I/O Privilege Level (IOPL) 1
+        const RFLAGS_IOPL1 = 1 << 12,
+        /// I/O Privilege Level (IOPL) 2
+        const RFLAGS_IOPL2 = 2 << 12,
+        /// I/O Privilege Level (IOPL) 3
+        const RFLAGS_IOPL3 = 3 << 12,
+        /// Overflow Flag (OF)
+        const RFLAGS_OF   = 1 << 11,
+        /// Direction Flag (DF)
+        const RFLAGS_DF   = 1 << 10,
+        /// Interrupt Enable Flag (IF)
+        const RFLAGS_IF   = 1 << 9,
+        /// Trap Flag (TF)
+        const RFLAGS_TF   = 1 << 8,
+        /// Sign Flag (SF)
+        const RFLAGS_SF   = 1 << 7,
+        /// Zero Flag (ZF)
+        const RFLAGS_ZF   = 1 << 6,
+        /// Auxiliary Carry Flag (AF)
+        const RFLAGS_AF   = 1 << 4,
+        /// Parity Flag (PF)
+        const RFLAGS_PF   = 1 << 2,
+        /// Bit 1 is always 1.
+        const RFLAGS_A1   = 1 << 1,
+        /// Carry Flag (CF)
+        const RFLAGS_CF   = 1 << 0,
+    }
+}
+
+impl RFlags {
+    /// Creates a new RFlags entry. Ensures bit 1 is set.
+    pub fn new() -> RFlags {
+        RFLAGS_A1
+    }
+}