summaryrefslogtreecommitdiff
path: root/arch/mips/isa/bitfields.isa
diff options
context:
space:
mode:
authorKorey Sewell <ksewell@umich.edu>2006-02-07 18:36:08 -0500
committerKorey Sewell <ksewell@umich.edu>2006-02-07 18:36:08 -0500
commitd30262d480b8a167470c17a35aecc727ea933a22 (patch)
tree2347e6aa83361205837d6595350c72faf08daffb /arch/mips/isa/bitfields.isa
parent6d2807ded8660f241aaecd28ff716c1d91f8b5a0 (diff)
downloadgem5-d30262d480b8a167470c17a35aecc727ea933a22.tar.xz
name changes ... minor IntOP format change
arch/mips/isa/formats/int.format: Looks like Integer Ops with Immediates may not need their own separate class because all those instructions are distinct from their reg-reg counterparts --HG-- rename : arch/mips/isa/bitfields.def => arch/mips/isa/bitfields.isa rename : arch/mips/isa/decoder.def => arch/mips/isa/decoder.isa rename : arch/mips/isa/formats.def => arch/mips/isa/formats.isa rename : arch/mips/isa/includes.h => arch/mips/isa/includes.isa rename : arch/mips/isa/operands.def => arch/mips/isa/operands.isa extra : convert_revision : 8e354b4232b28c0264d98d333d55ef8b5a6589cc
Diffstat (limited to 'arch/mips/isa/bitfields.isa')
-rw-r--r--arch/mips/isa/bitfields.isa51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/isa/bitfields.isa b/arch/mips/isa/bitfields.isa
new file mode 100644
index 000000000..94a8a6467
--- /dev/null
+++ b/arch/mips/isa/bitfields.isa
@@ -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>;
+
+// Integer operate format
+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>;
+
+def bitfield INTIMM <15: 0>; // integer immediate (literal)
+
+// 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>;
+
+// 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>;