[PATCH] D63257: [ARM] Select MVE fp add and sub

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: t.p.northover, simon_tatham, samparker, ostannard.
Herald added subscribers: hiraditya, kristof.beyls, javed.absar.
Herald added a project: LLVM.

Same as integer addition, we can add simple floating point MVE addition and subtraction patterns.

Initial code by David Sherwood


https://reviews.llvm.org/D63257

Files:
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/test/CodeGen/Thumb2/mve-simple-arith.ll


Index: llvm/test/CodeGen/Thumb2/mve-simple-arith.ll
===================================================================
--- llvm/test/CodeGen/Thumb2/mve-simple-arith.ll
+++ llvm/test/CodeGen/Thumb2/mve-simple-arith.ll
@@ -31,6 +31,26 @@
   ret <4 x i32> %0
 }
 
+define arm_aapcs_vfpcc <8 x half> @add_float16_t(<8 x half> %src1, <8 x half> %src2) {
+; CHECK-LABEL: add_float16_t:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    vadd.f16 q0, q1, q0
+; CHECK-NEXT:    bx lr
+entry:
+  %0 = fadd nnan ninf nsz <8 x half> %src2, %src1
+  ret <8 x half> %0
+}
+
+define arm_aapcs_vfpcc <4 x float> @add_float32_t(<4 x float> %src1, <4 x float> %src2) {
+; CHECK-LABEL: add_float32_t:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    vadd.f32 q0, q1, q0
+; CHECK-NEXT:    bx lr
+entry:
+  %0 = fadd nnan ninf nsz <4 x float> %src2, %src1
+  ret <4 x float> %0
+}
+
 
 define arm_aapcs_vfpcc <16 x i8> @sub_int8_t(<16 x i8> %src1, <16 x i8> %src2) {
 ; CHECK-LABEL: sub_int8_t:
@@ -62,3 +82,23 @@
   ret <4 x i32> %0
 }
 
+define arm_aapcs_vfpcc <8 x half> @sub_float16_t(<8 x half> %src1, <8 x half> %src2) {
+; CHECK-LABEL: sub_float16_t:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    vsub.f16 q0, q1, q0
+; CHECK-NEXT:    bx lr
+entry:
+  %0 = fsub nnan ninf nsz <8 x half> %src2, %src1
+  ret <8 x half> %0
+}
+
+define arm_aapcs_vfpcc <4 x float> @sub_float32_t(<4 x float> %src1, <4 x float> %src2) {
+; CHECK-LABEL: sub_float32_t:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    vsub.f32 q0, q1, q0
+; CHECK-NEXT:    bx lr
+entry:
+  %0 = fsub nnan ninf nsz <4 x float> %src2, %src1
+  ret <4 x float> %0
+}
+
Index: llvm/lib/Target/ARM/ARMInstrMVE.td
===================================================================
--- llvm/lib/Target/ARM/ARMInstrMVE.td
+++ llvm/lib/Target/ARM/ARMInstrMVE.td
@@ -4089,9 +4089,23 @@
                          (v4i32 MQPR:$val2)))>;
 }
 
+multiclass unpred_fp_op_rr<SDPatternOperator opnode, string RegRegOp> {
+  def f16 : Pat<(v8f16 (opnode (v8f16 MQPR:$val1), (v8f16 MQPR:$val2))),
+                (v8f16 (!cast<Instruction>(RegRegOp#"f16")
+                         (v8f16 MQPR:$val1), (v8f16 MQPR:$val2)))>;
+  def f32 : Pat<(v4f32 (opnode (v4f32 MQPR:$val1), (v4f32 MQPR:$val2))),
+                (v4f32 (!cast<Instruction>(RegRegOp#"f32")
+                         (v4f32 MQPR:$val1), (v4f32 MQPR:$val2)))>;
+}
+
 // Arithmetic
 
 let Predicates = [HasMVEInt] in {
   defm Pat_VADDt1i        : unpred_int_op_rr<add, "VADDt1">;
   defm Pat_VSUBt1i        : unpred_int_op_rr<sub, "VSUBt1">;
 }
+
+let Predicates = [HasMVEFloat] in {
+  defm Pat_VADDfpt1       : unpred_fp_op_rr<fadd, "VADDt1">;
+  defm Pat_VSUBfpt1       : unpred_fp_op_rr<fsub, "VSUBt1">;
+}


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