Boris Shingarov has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/40937 )
Change subject: arch-power: Add time base instructions
......................................................................
arch-power: Add time base instructions
This models a pseudo time base using the simulator ticks
and adds the following instructions.
* Move From Time Base (mftb)
* Move From Time Base Upper (mftbu)
Change-Id: Idb619ec3179b2a85925998282075bde8651c68c2
Signed-off-by: Sandipan Das <[email protected]>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/40937
Reviewed-by: Boris Shingarov <[email protected]>
Maintainer: Boris Shingarov <[email protected]>
Tested-by: kokoro <[email protected]>
---
M src/arch/power/insts/integer.cc
M src/arch/power/isa/decoder.isa
2 files changed, 8 insertions(+), 2 deletions(-)
Approvals:
Boris Shingarov: Looks good to me, approved; Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/arch/power/insts/integer.cc
b/src/arch/power/insts/integer.cc
index 7795b50..18a72ab 100644
--- a/src/arch/power/insts/integer.cc
+++ b/src/arch/power/insts/integer.cc
@@ -46,13 +46,17 @@
myMnemonic == "mtxer" ||
myMnemonic == "mtlr" ||
myMnemonic == "mtctr" ||
- myMnemonic == "mttar") {
+ myMnemonic == "mttar" ||
+ myMnemonic == "mttb" ||
+ myMnemonic == "mttbu") {
printDest = false;
} else if (myMnemonic == "mfcr" ||
myMnemonic == "mfxer" ||
myMnemonic == "mflr" ||
myMnemonic == "mfctr" ||
- myMnemonic == "mftar") {
+ myMnemonic == "mftar" ||
+ myMnemonic == "mftb" ||
+ myMnemonic == "mftbu") {
printSrcs = false;
}
diff --git a/src/arch/power/isa/decoder.isa b/src/arch/power/isa/decoder.isa
index d752630..461e2cb 100644
--- a/src/arch/power/isa/decoder.isa
+++ b/src/arch/power/isa/decoder.isa
@@ -1023,6 +1023,8 @@
0x100: mflr({{ Rt = LR; }});
0x120: mfctr({{ Rt = CTR; }});
0x1f9: mftar({{ Rt = TAR; }});
+ 0x188: mftb({{ Rt = curTick(); }});
+ 0x1a8: mftbu({{ Rt_uw = curTick() >> 32; }});
}
467: decode SPR {
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Idb619ec3179b2a85925998282075bde8651c68c2
Gerrit-Change-Number: 40937
Gerrit-PatchSet: 10
Gerrit-Owner: Sandipan Das <[email protected]>
Gerrit-Reviewer: Boris Shingarov <[email protected]>
Gerrit-Reviewer: kokoro <[email protected]>
Gerrit-MessageType: merged
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