changeset 18ed7aa8e8e1 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=18ed7aa8e8e1
description:
X86: Implement the xadd instruction.
diffstat:
2 files changed, 24 insertions(+), 4 deletions(-)
src/arch/x86/isa/decoder/two_byte_opcodes.isa | 4 +--
src/arch/x86/isa/insts/general_purpose/semaphores.py | 24 ++++++++++++++++--
diffs (50 lines):
diff -r a9e8668557bf -r 18ed7aa8e8e1
src/arch/x86/isa/decoder/two_byte_opcodes.isa
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa Sun Jan 25 20:32:43
2009 -0800
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa Sun Jan 25 20:33:27
2009 -0800
@@ -870,8 +870,8 @@
0x7: Inst::MOVSX_W(Gv,Ev);
}
0x18: decode OPCODE_OP_BOTTOM3 {
- 0x0: xadd_Eb_Gb();
- 0x1: xadd_Ev_Gv();
+ 0x0: Inst::XADD(Eb,Gb);
+ 0x1: Inst::XADD(Ev,Gv);
//0x7: group9();
0x7: decode MODRM_REG {
0x1: cmpxchg_Mq();
diff -r a9e8668557bf -r 18ed7aa8e8e1
src/arch/x86/isa/insts/general_purpose/semaphores.py
--- a/src/arch/x86/isa/insts/general_purpose/semaphores.py Sun Jan 25
20:32:43 2009 -0800
+++ b/src/arch/x86/isa/insts/general_purpose/semaphores.py Sun Jan 25
20:33:27 2009 -0800
@@ -78,10 +78,30 @@
st t1, seg, riprel, disp
mov rax, rax, t1, flags=(nCZF,)
};
+
+def macroop XADD_M_R {
+ ldst t1, seg, sib, disp
+ add t2, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
+ st t2, seg, sib, disp
+ mov reg, reg, t1
+};
+
+def macroop XADD_P_R {
+ rdip t7
+ ldst t1, seg, riprel, disp
+ add t2, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
+ st t2, seg, riprel, disp
+ mov reg, reg, t1
+};
+
+def macroop XADD_R_R {
+ add t2, regm, reg, flags=(OF,SF,ZF,AF,PF,CF)
+ mov regm, regm, reg
+ mov reg, reg, t2
+};
+
'''
#let {{
-# class XADD(Inst):
-# "GenFault ${new UnimpInstFault}"
# class XCHG(Inst):
# "GenFault ${new UnimpInstFault}"
#}};
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