[gem5-dev] changeset in gem5: gpu-compute, hsail: call discardFetch() from ...

[Tony Gutierrez]

changeset c3b4d57a15c5 in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=c3b4d57a15c5
description:
        gpu-compute, hsail: call discardFetch() from the WF

        because every taken branch causes fetch to be discarded, we move the 
call
        to the WF to avoid to have to call it from each and every branch 
instruction
        type.

diffstat:

 src/arch/hsail/insts/branch.hh |  3 ---
 src/gpu-compute/wavefront.cc   |  2 ++
 2 files changed, 2 insertions(+), 3 deletions(-)

diffs (39 lines):

diff -r bc1f702c25b9 -r c3b4d57a15c5 src/arch/hsail/insts/branch.hh
--- a/src/arch/hsail/insts/branch.hh    Wed Oct 26 22:47:19 2016 -0400
+++ b/src/arch/hsail/insts/branch.hh    Wed Oct 26 22:47:27 2016 -0400
@@ -133,7 +133,6 @@
             // Rpc and execution mask remain the same
             w->pc(getTargetPc());
         }
-        w->discardFetch();
     }
 
     class BrnDirectInst : public BrnInstBase<LabelOperand>
@@ -293,7 +292,6 @@
             w->pushToReconvergenceStack(true_pc, rpc, true_mask);
         }
         assert(w->pc() != curr_pc);
-        w->discardFetch();
     }
 
 
@@ -405,7 +403,6 @@
             // Rpc and execution mask remain the same
             w->pc(getTargetPc());
         }
-        w->discardFetch();
     }
 
     class BrDirectInst : public BrInstBase<LabelOperand>
diff -r bc1f702c25b9 -r c3b4d57a15c5 src/gpu-compute/wavefront.cc
--- a/src/gpu-compute/wavefront.cc      Wed Oct 26 22:47:19 2016 -0400
+++ b/src/gpu-compute/wavefront.cc      Wed Oct 26 22:47:27 2016 -0400
@@ -675,6 +675,8 @@
         } else {
             instructionBuffer.pop_front();
         }
+    } else {
+        discardFetch();
     }
 
     if (computeUnit->shader->hsail_mode==Shader::SIMT) {
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