[SME] Add intrinsics for FCVT(wid.) and FCVTL (llvm#90215)

According to the specification in ARM-software/acle#309 this adds the intrinsics ``` svfloat32x2_t svcvt_f32[_f16_x2](svfloat16_t zn) __arm_streaming; svfloat32x2_t svcvtl_f32[_f16_x2](svfloat16_t zn) __arm_streaming; ``` These are available only if __ARM_FEATURE_SME_F16F16 is enabled. --------- Co-authored-by: Caroline Concatto <caroline.concatto@arm.com>
hansangbae · May 23, 2024 · 05c154f · 05c154f
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diff --git a/clang/include/clang/Basic/arm_sve.td b/clang/include/clang/Basic/arm_sve.td
@@ -2265,6 +2265,10 @@ let TargetGuard = "sme2" in {
  def SVCVT_S32_F32_X4 : SInst<"svcvt_{d}[_f32_x4]", "4.d4.M", "i", MergeNone, "aarch64_sve_fcvtzs_x4", [IsStreaming, IsOverloadWhileOrMultiVecCvt], []>;
 }
 
+let TargetGuard = "sme-f16f16" in {
+ def SVCVT_F32_X2 : SInst<"svcvt_{d}[_f16_x2]", "2h", "f", MergeNone, "aarch64_sve_fcvt_widen_x2", [ IsStreaming],[]>;
+}
+
 //
 // Multi-vector floating-point convert from single-precision to interleaved half-precision/BFloat16
 //
@@ -2273,6 +2277,13 @@ let TargetGuard = "sme2" in {
  def SVCVTN_BF16_X2 : SInst<"svcvtn_bf16[_f32_x2]", "$2", "f", MergeNone, "aarch64_sve_bfcvtn_x2", [IsOverloadNone, IsStreaming],[]>;
 }
 
+//
+//Multi-vector floating-point convert from half-precision to deinterleaved single-precision.
+//
+let TargetGuard = "sme-f16f16" in {
+ def SVCVTL_F32_X2 : SInst<"svcvtl_f32[_f16_x2]", "2h", "f", MergeNone, "aarch64_sve_fcvtl_widen_x2", [ IsStreaming],[]>;
+}
+
 //
 // Multi-vector saturating extract narrow
 //

diff --git a/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_cvt.c b/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_cvt.c
@@ -497,3 +497,25 @@ svuint8_t test_qcvt_u8_s32_x4(svint32x4_t zn) __arm_streaming {
 svuint16_t test_qcvt_u16_s64_x4(svint64x4_t zn) __arm_streaming {
  return SVE_ACLE_FUNC(svqcvt_u16,_s64_x4,,)(zn);
 }
+
+// CHECK-LABEL: @test_cvt_f32_x2(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call { <vscale x 4 x float>, <vscale x 4 x float> } @llvm.aarch64.sve.fcvt.widen.x2.nxv4f32(<vscale x 8 x half> [[ZN:%.*]])
+// CHECK-NEXT: [[TMP1:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 0
+// CHECK-NEXT: [[TMP2:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> poison, <vscale x 4 x float> [[TMP1]], i64 0)
+// CHECK-NEXT: [[TMP3:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 1
+// CHECK-NEXT: [[TMP4:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> [[TMP2]], <vscale x 4 x float> [[TMP3]], i64 4)
+// CHECK-NEXT: ret <vscale x 8 x float> [[TMP4]]
+//
+// CPP-CHECK-LABEL: @_Z15test_cvt_f32_x2u13__SVFloat16_t(
+// CPP-CHECK-NEXT: entry:
+// CPP-CHECK-NEXT: [[TMP0:%.*]] = tail call { <vscale x 4 x float>, <vscale x 4 x float> } @llvm.aarch64.sve.fcvt.widen.x2.nxv4f32(<vscale x 8 x half> [[ZN:%.*]])
+// CPP-CHECK-NEXT: [[TMP1:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 0
+// CPP-CHECK-NEXT: [[TMP2:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> poison, <vscale x 4 x float> [[TMP1]], i64 0)
+// CPP-CHECK-NEXT: [[TMP3:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 1
+// CPP-CHECK-NEXT: [[TMP4:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> [[TMP2]], <vscale x 4 x float> [[TMP3]], i64 4)
+// CPP-CHECK-NEXT: ret <vscale x 8 x float> [[TMP4]]
+//
+__attribute__((target("sme-f16f16"))) svfloat32x2_t test_cvt_f32_x2(svfloat16_t zn) __arm_streaming {
+ return SVE_ACLE_FUNC(svcvt_f32,_f16_x2,,)(zn);
+}
diff --git a/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_cvtl.c b/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_cvtl.c
@@ -0,0 +1,40 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+
+// REQUIRES: aarch64-registered-target
+
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme-f16f16 -S -disable-O0-optnone -Werror -Wall -emit-llvm -o - %s | opt -S -p mem2reg,instcombine,tailcallelim | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme-f16f16 -S -disable-O0-optnone -Werror -Wall -emit-llvm -o - -x c++ %s | opt -S -p mem2reg,instcombine,tailcallelim | FileCheck %s -check-prefix=CPP-CHECK
+// RUN: %clang_cc1 -D__SVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme-f16f16 -S -disable-O0-optnone -Werror -Wall -emit-llvm -o - %s | opt -S -p mem2reg,instcombine,tailcallelim | FileCheck %s
+// RUN: %clang_cc1 -D__SVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme-f16f16 -S -disable-O0-optnone -Werror -Wall -emit-llvm -o - -x c++ %s | opt -S -p mem2reg,instcombine,tailcallelim | FileCheck %s -check-prefix=CPP-CHECK
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme-f16f16 -S -disable-O0-optnone -Werror -Wall -o /dev/null %s
+
+#include <arm_sme.h>
+
+#ifdef SVE_OVERLOADED_FORMS
+// A simple used,unused... macro, long enough to represent any SVE builtin.
+#define SVE_ACLE_FUNC(A1,A2_UNUSED,A3,A4_UNUSED) A1##A3
+#else
+#define SVE_ACLE_FUNC(A1,A2,A3,A4) A1##A2##A3##A4
+#endif
+
+// CHECK-LABEL: @test_cvtl_f32_x2(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[TMP0:%.*]] = tail call { <vscale x 4 x float>, <vscale x 4 x float> } @llvm.aarch64.sve.fcvtl.widen.x2.nxv4f32(<vscale x 8 x half> [[ZN:%.*]])
+// CHECK-NEXT: [[TMP1:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 0
+// CHECK-NEXT: [[TMP2:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> poison, <vscale x 4 x float> [[TMP1]], i64 0)
+// CHECK-NEXT: [[TMP3:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 1
+// CHECK-NEXT: [[TMP4:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> [[TMP2]], <vscale x 4 x float> [[TMP3]], i64 4)
+// CHECK-NEXT: ret <vscale x 8 x float> [[TMP4]]
+//
+// CPP-CHECK-LABEL: @_Z16test_cvtl_f32_x2u13__SVFloat16_t(
+// CPP-CHECK-NEXT: entry:
+// CPP-CHECK-NEXT: [[TMP0:%.*]] = tail call { <vscale x 4 x float>, <vscale x 4 x float> } @llvm.aarch64.sve.fcvtl.widen.x2.nxv4f32(<vscale x 8 x half> [[ZN:%.*]])
+// CPP-CHECK-NEXT: [[TMP1:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 0
+// CPP-CHECK-NEXT: [[TMP2:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> poison, <vscale x 4 x float> [[TMP1]], i64 0)
+// CPP-CHECK-NEXT: [[TMP3:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[TMP0]], 1
+// CPP-CHECK-NEXT: [[TMP4:%.*]] = tail call <vscale x 8 x float> @llvm.vector.insert.nxv8f32.nxv4f32(<vscale x 8 x float> [[TMP2]], <vscale x 4 x float> [[TMP3]], i64 4)
+// CPP-CHECK-NEXT: ret <vscale x 8 x float> [[TMP4]]
+//
+svfloat32x2_t test_cvtl_f32_x2(svfloat16_t zn) __arm_streaming {
+ return SVE_ACLE_FUNC(svcvtl_f32,_f16_x2,,)(zn);
+}
diff --git a/llvm/include/llvm/IR/IntrinsicsAArch64.td b/llvm/include/llvm/IR/IntrinsicsAArch64.td
@@ -3121,6 +3121,11 @@ let TargetPrefix = "aarch64" in {
  : DefaultAttrsIntrinsic<[llvm_nxv8bf16_ty],
  [llvm_nxv4f32_ty, llvm_nxv4f32_ty],
  [IntrNoMem]>;
+
+ class SME2_CVT_WIDENING_VG2_Intrinsic
+ : DefaultAttrsIntrinsic<[llvm_anyvector_ty, LLVMMatchType<0>],
+ [LLVMSubdivide2VectorType<0>], [IntrNoMem]>;
+
 
  class SME2_CVT_VG4_SINGLE_Intrinsic
  : DefaultAttrsIntrinsic<[LLVMSubdivide4VectorType<0>],
@@ -3412,6 +3417,13 @@ let TargetPrefix = "aarch64" in {
  def int_aarch64_sme_suvdot_lane_za32_vg1x4 : SME2_Matrix_ArrayVector_VG4_Multi_Index_Intrinsic;
  def int_aarch64_sme_usvdot_lane_za32_vg1x4 : SME2_Matrix_ArrayVector_VG4_Multi_Index_Intrinsic;
 
+
+ //
+ //Multi-vector floating-point convert from half-precision to deinterleaved single-precision.
+ //
+
+ def int_aarch64_sve_fcvtl_widen_x2 : SME2_CVT_WIDENING_VG2_Intrinsic;
+
  //
  // Multi-vector floating-point CVT from single-precision to interleaved half-precision/BFloat16
  //
@@ -3431,7 +3443,7 @@ let TargetPrefix = "aarch64" in {
  def int_aarch64_sve_fcvtzu_x4 : SME2_CVT_X4_Intrinsic;
  def int_aarch64_sve_scvtf_x4 : SME2_CVT_X4_Intrinsic;
  def int_aarch64_sve_ucvtf_x4 : SME2_CVT_X4_Intrinsic;
-
+ def int_aarch64_sve_fcvt_widen_x2 : SME2_CVT_WIDENING_VG2_Intrinsic;
  //
  // Multi-vector saturating extract narrow
  //

diff --git a/llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp b/llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
@@ -5717,6 +5717,12 @@ void AArch64DAGToDAGISel::Select(SDNode *Node) {
  case Intrinsic::aarch64_sve_ucvtf_x4:
  SelectCVTIntrinsic(Node, 4, AArch64::UCVTF_4Z4Z_StoS);
  return;
+ case Intrinsic::aarch64_sve_fcvt_widen_x2:
+ SelectUnaryMultiIntrinsic(Node, 2, false, AArch64::FCVT_2ZZ_H_S);
+ return;
+ case Intrinsic::aarch64_sve_fcvtl_widen_x2:
+ SelectUnaryMultiIntrinsic(Node, 2, false, AArch64::FCVTL_2ZZ_H_S);
+ return;
  case Intrinsic::aarch64_sve_sclamp_single_x2:
  if (auto Op = SelectOpcodeFromVT<SelectTypeKind::Int>(
  Node->getValueType(0),

diff --git a/llvm/test/CodeGen/AArch64/sme2-intrinsics-cvt.ll b/llvm/test/CodeGen/AArch64/sme2-intrinsics-cvt.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sme2 -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sme-f16f16 -verify-machineinstrs < %s | FileCheck %s
 
 ;
 ; FCVT
@@ -139,6 +139,15 @@ define {<vscale x 4 x float>, <vscale x 4 x float>,<vscale x 4 x float>, <vscale
  ret {<vscale x 4 x float>, <vscale x 4 x float>,<vscale x 4 x float>, <vscale x 4 x float>} %res
 }
 
+define {<vscale x 4 x float>, <vscale x 4 x float>} @multi_vector_cvt_widen_x2_f16(<vscale x 8 x half> %zn0) {
+; CHECK-LABEL: multi_vector_cvt_widen_x2_f16:
+; CHECK: // %bb.0:
+; CHECK-NEXT: fcvt { z0.s, z1.s }, z0.h
+; CHECK-NEXT: ret
+ %res = call { <vscale x 4 x float>, <vscale x 4 x float> } @llvm.aarch64.sve.fcvt.widen.x2.nxv4f32(<vscale x 8 x half> %zn0)
+ ret {<vscale x 4 x float>, <vscale x 4 x float>} %res
+}
+
 declare <vscale x 8 x half> @llvm.aarch64.sve.fcvt.x2.nxv4f32(<vscale x 4 x float>, <vscale x 4 x float>)
 declare <vscale x 8 x bfloat> @llvm.aarch64.sve.bfcvt.x2(<vscale x 4 x float>, <vscale x 4 x float>)
 declare {<vscale x 4 x i32>, <vscale x 4 x i32>} @llvm.aarch64.sve.fcvtzs.x2.nxv4i32.nxv4f32(<vscale x 4 x float>,<vscale x 4 x float>)

diff --git a/llvm/test/CodeGen/AArch64/sme2-intrinsics-cvtl.ll b/llvm/test/CodeGen/AArch64/sme2-intrinsics-cvtl.ll
@@ -0,0 +1,11 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sme-f16f16 -verify-machineinstrs < %s | FileCheck %s
+
+define {<vscale x 4 x float>, <vscale x 4 x float>} @multi_vector_cvtl_widen_x2_f16(<vscale x 8 x half> %zn0) {
+; CHECK-LABEL: multi_vector_cvtl_widen_x2_f16:
+; CHECK: // %bb.0:
+; CHECK-NEXT: fcvtl { z0.s, z1.s }, z0.h
+; CHECK-NEXT: ret
+ %res = call { <vscale x 4 x float>, <vscale x 4 x float> } @llvm.aarch64.sve.fcvtl.widen.x2.nxv4f32(<vscale x 8 x half> %zn0)
+ ret {<vscale x 4 x float>, <vscale x 4 x float>} %res
+}