diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ/SystemZInstrFP.td')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZInstrFP.td | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrFP.td b/llvm/lib/Target/SystemZ/SystemZInstrFP.td index efa29fa9c00..27fbd7df288 100644 --- a/llvm/lib/Target/SystemZ/SystemZInstrFP.td +++ b/llvm/lib/Target/SystemZ/SystemZInstrFP.td @@ -46,9 +46,14 @@ let Defs = [CC], CCValues = 0xF, CompareZeroCCMask = 0xF in { defm LTDBR : LoadAndTestRRE<"ltdb", 0xB312, FP64>; defm LTXBR : LoadAndTestRRE<"ltxb", 0xB342, FP128>; } -defm : CompareZeroFP<LTEBRCompare, FP32>; -defm : CompareZeroFP<LTDBRCompare, FP64>; -defm : CompareZeroFP<LTXBRCompare, FP128>; +// Note that the comparison against zero operation is not available if we +// have vector support, since load-and-test instructions will partially +// clobber the target (vector) register. +let Predicates = [FeatureNoVector] in { + defm : CompareZeroFP<LTEBRCompare, FP32>; + defm : CompareZeroFP<LTDBRCompare, FP64>; + defm : CompareZeroFP<LTXBRCompare, FP128>; +} // Moves between 64-bit integer and floating-point registers. def LGDR : UnaryRRE<"lgd", 0xB3CD, bitconvert, GR64, FP64>; @@ -98,6 +103,9 @@ let canFoldAsLoad = 1, SimpleBDXLoad = 1 in { defm LE : UnaryRXPair<"le", 0x78, 0xED64, load, FP32, 4>; defm LD : UnaryRXPair<"ld", 0x68, 0xED65, load, FP64, 8>; + // For z13 we prefer LDE over LE to avoid partial register dependencies. + def LDE32 : UnaryRXE<"lde", 0xED24, null_frag, FP32, 4>; + // These instructions are split after register allocation, so we don't // want a custom inserter. let Has20BitOffset = 1, HasIndex = 1, Is128Bit = 1 in { |
