1 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/isa/bitfields.def b/arch/mips/isa/bitfields.def
new file mode 100644
index 000000000..0a9497899
--- /dev/null
+++ b/arch/mips/isa/bitfields.def
@@ -0,0 +1,51 @@
+////////////////////////////////////////////////////////////////////
+//
+// Bitfield definitions.
+//
+
+def bitfield OPCODE_HI  <31:29>;
+def bitfield OPCODE_LO  <28:26>;
+
+def bitfield FUNCTION_HI   < 5: 3>;
+def bitfield FUNCTION_LO   < 2: 0>;
+
+def bitfield RT	      <20:16>;
+def bitfield RT_HI    <20:19>;
+def bitfield RT_LO    <18:16>;
+
+def bitfield RS	      <25:21>;
+def bitfield RS_HI    <25:24>;
+def bitfield RS_LO    <23:21>;
+
+def bitfield RD	      <15:11>;
+
+// Floating-point operate format
+def bitfield FMT	  <25:21>;
+def bitfield FT	      <20:16>;
+def bitfield FS	      <15:11>;
+def bitfield FD	      <10:6>;
+
+def bitfield MOVCI    <16:16>;
+def bitfield MOVCF    <16:16>;
+def bitfield SRL      <21:21>;
+def bitfield SRLV     < 6: 6>;
+def bitfield SA       <10: 6>;
+
+// Interrupts
+def bitfield SC       < 5: 5>;
+
+// Integer operate format(s>;
+def bitfield INTIMM	<15: 0>; // integer immediate (literal)
+
+// Branch format
+def bitfield OFFSET <15: 0>; // displacement
+
+// Memory-format jumps
+def bitfield JMPTARG	<25: 0>; 
+def bitfield JMPHINT	<10: 6>; 
+
+def bitfield SYSCALLCODE <25: 6>; 
+def bitfield TRAPCODE    <15:13>; 
+
+// M5 instructions
+def bitfield M5FUNC <7:0>;