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| author | Austin Seipp <austin@well-typed.com> | 2013-10-01 21:13:14 -0500 |
|---|---|---|
| committer | Austin Seipp <austin@well-typed.com> | 2013-10-01 21:26:47 -0500 |
| commit | fd74014079f14bd3ab50e328e52c44ef97d40e05 (patch) | |
| tree | da31c992a76d3816a4f1012ceb1eb4e68d0fb556 /compiler/cmm/CmmMachOp.hs | |
| parent | 627d1e008cbe4d9318b2466394420a968d1659da (diff) | |
| download | haskell-fd74014079f14bd3ab50e328e52c44ef97d40e05.tar.gz | |
Add support for prefetch with locality levels.
This patch adds support for several new primitive operations which
support using processor-specific instructions to help guide data and
cache locality decisions. We have levels ranging from [0..3]
For LLVM, we generate llvm.prefetch intrinsics at the proper locality
level (similar to GCC.)
For x86 we generate prefetch{NTA, t2, t1, t0} instructions. On SPARC and
PowerPC, the locality levels are ignored.
This closes #8256.
Authored-by: Carter Tazio Schonwald <carter.schonwald@gmail.com>
Signed-off-by: Austin Seipp <austin@well-typed.com>
Diffstat (limited to 'compiler/cmm/CmmMachOp.hs')
| -rw-r--r-- | compiler/cmm/CmmMachOp.hs | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/compiler/cmm/CmmMachOp.hs b/compiler/cmm/CmmMachOp.hs index c009d15e25..684a4b9729 100644 --- a/compiler/cmm/CmmMachOp.hs +++ b/compiler/cmm/CmmMachOp.hs @@ -107,10 +107,10 @@ data MachOp -- Vector element insertion and extraction operations | MO_V_Insert Length Width -- Insert scalar into vector | MO_V_Extract Length Width -- Extract scalar from vector - + -- Integer vector operations - | MO_V_Add Length Width - | MO_V_Sub Length Width + | MO_V_Add Length Width + | MO_V_Sub Length Width | MO_V_Mul Length Width -- Signed vector multiply/divide @@ -127,8 +127,8 @@ data MachOp | MO_VF_Extract Length Width -- Extract scalar from vector -- Floating point vector operations - | MO_VF_Add Length Width - | MO_VF_Sub Length Width + | MO_VF_Add Length Width + | MO_VF_Sub Length Width | MO_VF_Neg Length Width -- unary - | MO_VF_Mul Length Width | MO_VF_Quot Length Width @@ -528,8 +528,14 @@ data CallishMachOp | MO_Touch -- Keep variables live (when using interior pointers) -- Prefetch - | MO_Prefetch_Data -- Prefetch hint. May change program performance but not + | MO_Prefetch_Data Int -- Prefetch hint. May change program performance but not -- program behavior. + -- the Int can be 0-3. Needs to be known at compile time + -- to interact with code generation correctly. + -- TODO: add support for prefetch WRITES, + -- currently only exposes prefetch reads, which + -- would the majority of use cases in ghc anyways + -- Note that these three MachOps all take 1 extra parameter than the -- standard C lib versions. The extra (last) parameter contains |