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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-27 09:54:29 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-27 09:54:29 +0000 |
| commit | 842a1be06c53757e7498c9894abc1431b633a92f (patch) | |
| tree | d784058c7258583429a11c277dd14f4cf3aff4e6 /lib/Target/SystemZ/SystemZOperators.td | |
| parent | c9617b9a9dfcb550adcf06f83a58a5e522414cc1 (diff) | |
| download | external_llvm-842a1be06c53757e7498c9894abc1431b633a92f.zip external_llvm-842a1be06c53757e7498c9894abc1431b633a92f.tar.gz external_llvm-842a1be06c53757e7498c9894abc1431b633a92f.tar.bz2 | |
[SystemZ] Extend memcpy and memset support to all constant lengths
Lengths up to a certain threshold (currently 6 * 256) use a series of MVCs.
Lengths above that threshold use a loop to handle X*256 bytes followed
by a single MVC to handle the excess (if any). This loop will also be
needed in future when support for variable lengths is added.
Because the same tablegen classes are used to define MVC and CLC,
the patch also has the side-effect of defining a pseudo loop instruction
for CLC. That instruction isn't used yet (and wouldn't be handled correctly
if it were). I'm planning to use it soon though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189331 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/SystemZOperators.td')
| -rw-r--r-- | lib/Target/SystemZ/SystemZOperators.td | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/Target/SystemZ/SystemZOperators.td b/lib/Target/SystemZ/SystemZOperators.td index e2c43d6..ff64ea8 100644 --- a/lib/Target/SystemZ/SystemZOperators.td +++ b/lib/Target/SystemZ/SystemZOperators.td @@ -57,7 +57,12 @@ def SDT_ZAtomicCmpSwapW : SDTypeProfile<1, 6, def SDT_ZMemMemLength : SDTypeProfile<0, 3, [SDTCisPtrTy<0>, SDTCisPtrTy<1>, - SDTCisVT<2, i32>]>; + SDTCisVT<2, i64>]>; +def SDT_ZMemMemLoop : SDTypeProfile<0, 4, + [SDTCisPtrTy<0>, + SDTCisPtrTy<1>, + SDTCisVT<2, i64>, + SDTCisVT<3, i64>]>; def SDT_ZString : SDTypeProfile<1, 3, [SDTCisPtrTy<0>, SDTCisPtrTy<1>, @@ -123,8 +128,12 @@ def z_atomic_cmp_swapw : AtomicWOp<"ATOMIC_CMP_SWAPW", SDT_ZAtomicCmpSwapW>; def z_mvc : SDNode<"SystemZISD::MVC", SDT_ZMemMemLength, [SDNPHasChain, SDNPMayStore, SDNPMayLoad]>; +def z_mvc_loop : SDNode<"SystemZISD::MVC_LOOP", SDT_ZMemMemLoop, + [SDNPHasChain, SDNPMayStore, SDNPMayLoad]>; def z_clc : SDNode<"SystemZISD::CLC", SDT_ZMemMemLength, [SDNPHasChain, SDNPOutGlue, SDNPMayLoad]>; +def z_clc_loop : SDNode<"SystemZISD::CLC_LOOP", SDT_ZMemMemLoop, + [SDNPHasChain, SDNPOutGlue, SDNPMayLoad]>; def z_strcmp : SDNode<"SystemZISD::STRCMP", SDT_ZString, [SDNPHasChain, SDNPOutGlue, SDNPMayLoad]>; def z_stpcpy : SDNode<"SystemZISD::STPCPY", SDT_ZString, |