[X86][AVX2] vpslldq/vpsrldq byte shifts for AVX2

[oota-llvm.git] / lib / Target / X86 / X86InstrSSE.td

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index d684976770533a60ee4d375722663d433d14c846..dc54fc5c9ca54671343908feb3c369228785b3ab 100644 (file)
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -4296,6 +4296,12 @@ let Predicates = [HasAVX2] in {
             (VPSLLDQYri VR256:$src1, (BYTE_imm imm:$src2))>;
   def : Pat<(int_x86_avx2_psrl_dq VR256:$src1, imm:$src2),
             (VPSRLDQYri VR256:$src1, (BYTE_imm imm:$src2))>;
+
+  // Shift up / down and insert zero's.
+  def : Pat<(v4i64 (X86vshldq VR256:$src, (i8 imm:$amt))),
+            (VPSLLDQYri VR256:$src, (BYTE_imm imm:$amt))>;
+  def : Pat<(v4i64 (X86vshrdq VR256:$src, (i8 imm:$amt))),
+            (VPSRLDQYri VR256:$src, (BYTE_imm imm:$amt))>;
 }
 
 let Predicates = [UseSSE2] in {