changeset a9e8668557bf in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=a9e8668557bf
description:
X86: Implement the bswap instruction.
diffstat:
2 files changed, 24 insertions(+), 2 deletions(-)
src/arch/x86/isa/decoder/two_byte_opcodes.isa |
6 ++-
src/arch/x86/isa/insts/general_purpose/data_conversion/endian_conversion.py |
20 +++++++++-
diffs (46 lines):
diff -r 624566640d7c -r a9e8668557bf
src/arch/x86/isa/decoder/two_byte_opcodes.isa
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa Sun Jan 25 20:32:26
2009 -0800
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa Sun Jan 25 20:32:43
2009 -0800
@@ -915,7 +915,11 @@
default: Inst::UD2();
}
}
- 0x19: bswap_B();
+ 0x19: decode OPSIZE {
+ 4: Inst::BSWAP_D(Bd);
+ 8: Inst::BSWAP_Q(Bq);
+ default: Inst::UD2();
+ }
0x1A: decode LEGACY_DECODEVAL {
// no prefix
0x0: decode OPCODE_OP_BOTTOM3 {
diff -r 624566640d7c -r a9e8668557bf
src/arch/x86/isa/insts/general_purpose/data_conversion/endian_conversion.py
---
a/src/arch/x86/isa/insts/general_purpose/data_conversion/endian_conversion.py
Sun Jan 25 20:32:26 2009 -0800
+++
b/src/arch/x86/isa/insts/general_purpose/data_conversion/endian_conversion.py
Sun Jan 25 20:32:43 2009 -0800
@@ -53,7 +53,25 @@
#
# Authors: Gabe Black
-microcode = ""
+microcode = '''
+def macroop BSWAP_D_R
+{
+ roli reg, reg, 8, dataSize=2
+ roli reg, reg, 16, dataSize=4
+ roli reg, reg, 8, dataSize=2
+};
+
+def macroop BSWAP_Q_R
+{
+ roli reg, reg, 8, dataSize=2
+ roli reg, reg, 16, dataSize=4
+ roli reg, reg, 8, dataSize=2
+ roli reg, reg, 32, dataSize=8
+ roli reg, reg, 8, dataSize=2
+ roli reg, reg, 16, dataSize=4
+ roli reg, reg, 8, dataSize=2
+};
+'''
#let {{
# class BSWAP(Inst):
# "GenFault ${new UnimpInstFault}"
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