diff options
| author | Roland Levillain <rpl@google.com> | 2016-07-13 11:54:35 +0100 |
|---|---|---|
| committer | Roland Levillain <rpl@google.com> | 2016-07-13 11:54:35 +0100 |
| commit | 02b75806a80f8b75c3d6ba2ff97c995117630f36 (patch) | |
| tree | ecdb1852c3e33f120110091cc2d07a9737fbd3b5 /compiler/optimizing/code_generator.h | |
| parent | 5f485719b166ceb8e591329d40e76c5e50988022 (diff) | |
Introduce more compact ReadBarrierMark slow-paths.
Replace entry point ReadBarrierMark with 32
ReadBarrierMarkRegX entry points, using register
number X as input and output (instead of the standard
runtime calling convention) to save two moves in Baker's
read barrier mark slow-path code.
Test: ART host and target (ARM, ARM64) tests.
Bug: 29506760
Bug: 12687968
Change-Id: I73cfb82831cf040b8b018e984163c865cc44ed87
Diffstat (limited to 'compiler/optimizing/code_generator.h')
| -rw-r--r-- | compiler/optimizing/code_generator.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h index 9364be35ff..b8540baca2 100644 --- a/compiler/optimizing/code_generator.h +++ b/compiler/optimizing/code_generator.h @@ -350,6 +350,16 @@ class CodeGenerator : public DeletableArenaObject<kArenaAllocCodeGenerator> { // accessing the String's `value` field in String intrinsics. static uint32_t GetArrayDataOffset(HArrayGet* array_get); + // Return the entry point offset for ReadBarrierMarkRegX, where X is `reg`. + template <size_t pointer_size> + static int32_t GetReadBarrierMarkEntryPointsOffset(size_t reg) { + DCHECK_LT(reg, 32u); + // The ReadBarrierMarkRegX entry points are ordered by increasing + // register number in Thread::tls_Ptr_.quick_entrypoints. + return QUICK_ENTRYPOINT_OFFSET(pointer_size, pReadBarrierMarkReg00).Int32Value() + + pointer_size * reg; + } + void EmitParallelMoves(Location from1, Location to1, Primitive::Type type1, |