changeset 9bdd52a2214c in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=9bdd52a2214c
description:
x86: Add microop for fence
This patch adds a new microop for memory barrier. The microop itself
does
nothing, but since it is marked as a memory barrier, the O3 CPU should
flush
all the pending loads and stores before the fence to the memory system.
diffstat:
src/arch/x86/isa/insts/general_purpose/arithmetic/add_and_subtract.py |
36 ++++++
src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py |
8 +
src/arch/x86/isa/insts/general_purpose/compare_and_test/bit_test.py |
24 ++++
src/arch/x86/isa/insts/general_purpose/data_transfer/xchg.py |
12 ++
src/arch/x86/isa/insts/general_purpose/logical.py |
28 +++++
src/arch/x86/isa/insts/general_purpose/semaphores.py |
8 +
src/arch/x86/isa/microops/specop.isa |
53 ++++++++++
7 files changed, 169 insertions(+), 0 deletions(-)
diffs (truncated from 747 to 300 lines):
diff -r 78da831670e4 -r 9bdd52a2214c
src/arch/x86/isa/insts/general_purpose/arithmetic/add_and_subtract.py
--- a/src/arch/x86/isa/insts/general_purpose/arithmetic/add_and_subtract.py
Thu Nov 03 22:52:02 2011 -0500
+++ b/src/arch/x86/isa/insts/general_purpose/arithmetic/add_and_subtract.py
Thu Nov 03 22:52:21 2011 -0500
@@ -67,18 +67,22 @@
def macroop ADD_LOCKED_M_I
{
limm t2, imm
+ mfence
ldstl t1, seg, sib, disp
add t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop ADD_LOCKED_P_I
{
rdip t7
limm t2, imm
+ mfence
ldstl t1, seg, riprel, disp
add t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop ADD_M_R
@@ -98,17 +102,21 @@
def macroop ADD_LOCKED_M_R
{
+ mfence
ldstl t1, seg, sib, disp
add t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop ADD_LOCKED_P_R
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
add t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop ADD_R_M
@@ -168,18 +176,22 @@
def macroop SUB_LOCKED_M_I
{
limm t2, imm
+ mfence
ldstl t1, seg, sib, disp
sub t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop SUB_LOCKED_P_I
{
rdip t7
limm t2, imm
+ mfence
ldstl t1, seg, riprel, disp
sub t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop SUB_M_R
@@ -199,17 +211,21 @@
def macroop SUB_LOCKED_M_R
{
+ mfence
ldstl t1, seg, sib, disp
sub t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop SUB_LOCKED_P_R
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
sub t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop ADC_R_R
@@ -243,18 +259,22 @@
def macroop ADC_LOCKED_M_I
{
limm t2, imm
+ mfence
ldstl t1, seg, sib, disp
adc t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop ADC_LOCKED_P_I
{
rdip t7
limm t2, imm
+ mfence
ldstl t1, seg, riprel, disp
adc t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop ADC_M_R
@@ -274,17 +294,21 @@
def macroop ADC_LOCKED_M_R
{
+ mfence
ldstl t1, seg, sib, disp
adc t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop ADC_LOCKED_P_R
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
adc t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop ADC_R_M
@@ -344,18 +368,22 @@
def macroop SBB_LOCKED_M_I
{
limm t2, imm
+ mfence
ldstl t1, seg, sib, disp
sbb t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop SBB_LOCKED_P_I
{
rdip t7
limm t2, imm
+ mfence
ldstl t1, seg, riprel, disp
sbb t1, t1, t2, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop SBB_M_R
@@ -375,17 +403,21 @@
def macroop SBB_LOCKED_M_R
{
+ mfence
ldstl t1, seg, sib, disp
sbb t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, sib, disp
+ mfence
};
def macroop SBB_LOCKED_P_R
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
sbb t1, t1, reg, flags=(OF,SF,ZF,AF,PF,CF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop NEG_R
@@ -410,16 +442,20 @@
def macroop NEG_LOCKED_M
{
+ mfence
ldstl t1, seg, sib, disp
sub t1, t0, t1, flags=(CF,OF,SF,ZF,AF,PF)
stul t1, seg, sib, disp
+ mfence
};
def macroop NEG_LOCKED_P
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
sub t1, t0, t1, flags=(CF,OF,SF,ZF,AF,PF)
stul t1, seg, riprel, disp
+ mfence
};
'''
diff -r 78da831670e4 -r 9bdd52a2214c
src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py
---
a/src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py
Thu Nov 03 22:52:02 2011 -0500
+++
b/src/arch/x86/isa/insts/general_purpose/arithmetic/increment_and_decrement.py
Thu Nov 03 22:52:21 2011 -0500
@@ -58,17 +58,21 @@
def macroop INC_LOCKED_M
{
+ mfence
ldstl t1, seg, sib, disp
addi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
stul t1, seg, sib, disp
+ mfence
};
def macroop INC_LOCKED_P
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
addi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
stul t1, seg, riprel, disp
+ mfence
};
def macroop DEC_R
@@ -93,16 +97,20 @@
def macroop DEC_LOCKED_M
{
+ mfence
ldstl t1, seg, sib, disp
subi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
stul t1, seg, sib, disp
+ mfence
};
def macroop DEC_LOCKED_P
{
rdip t7
+ mfence
ldstl t1, seg, riprel, disp
subi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
stul t1, seg, riprel, disp
+ mfence
};
'''
diff -r 78da831670e4 -r 9bdd52a2214c
src/arch/x86/isa/insts/general_purpose/compare_and_test/bit_test.py
--- a/src/arch/x86/isa/insts/general_purpose/compare_and_test/bit_test.py
Thu Nov 03 22:52:02 2011 -0500
+++ b/src/arch/x86/isa/insts/general_purpose/compare_and_test/bit_test.py
Thu Nov 03 22:52:21 2011 -0500
@@ -114,10 +114,12 @@
limm t1, imm, dataSize=asz
limm t4, 1
roli t4, t4, imm
+ mfence
ldstl t1, seg, sib, disp
sexti t0, t1, imm, flags=(CF,)
xor t1, t1, t4
stul t1, seg, sib, disp
+ mfence
};
def macroop BTC_LOCKED_P_I {
@@ -125,10 +127,12 @@
limm t1, imm, dataSize=asz
limm t4, 1
roli t4, t4, imm
+ mfence
ldstl t1, seg, riprel, disp
sexti t0, t1, imm, flags=(CF,)
xor t1, t1, t4
stul t1, seg, riprel, disp
+ mfence
};
def macroop BTC_R_R {
@@ -168,10 +172,12 @@
lea t3, flatseg, [dsz, t3, base], dataSize=asz
limm t4, 1
rol t4, t4, reg
+ mfence
ldstl t1, seg, [scale, index, t3], disp
sext t0, t1, reg, flags=(CF,)
xor t1, t1, t4
stul t1, seg, [scale, index, t3], disp
+ mfence
};
def macroop BTC_LOCKED_P_R {
@@ -180,10 +186,12 @@
srai t3, t2, ldsz, dataSize=asz
limm t4, 1
rol t4, t4, reg
+ mfence
ldstl t1, seg, [dsz, t3, t7], disp
sext t0, t1, reg, flags=(CF,)
xor t1, t1, t4
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