[RISCV] Custom lower vector llvm.is.fpclass to vfclass.v

After D149063.
This patch adds support for both scalable and fixed-length vector.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D151176

diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 3f8a45e..10fe699 100644 (file)
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -780,7 +780,8 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
       setOperationAction({ISD::FMINNUM, ISD::FMAXNUM}, VT, Legal);
 
       setOperationAction({ISD::FTRUNC, ISD::FCEIL, ISD::FFLOOR, ISD::FROUND,
-                          ISD::FROUNDEVEN, ISD::FRINT, ISD::FNEARBYINT},
+                          ISD::FROUNDEVEN, ISD::FRINT, ISD::FNEARBYINT,
+                          ISD::IS_FPCLASS},
                          VT, Custom);
 
       setOperationAction(FloatingPointVecReduceOps, VT, Custom);
@@ -1037,7 +1038,8 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
 
         setOperationAction({ISD::FADD, ISD::FSUB, ISD::FMUL, ISD::FDIV,
                             ISD::FNEG, ISD::FABS, ISD::FCOPYSIGN, ISD::FSQRT,
-                            ISD::FMA, ISD::FMINNUM, ISD::FMAXNUM},
+                            ISD::FMA, ISD::FMINNUM, ISD::FMAXNUM,
+                            ISD::IS_FPCLASS},
                            VT, Custom);
 
         setOperationAction({ISD::FP_ROUND, ISD::FP_EXTEND}, VT, Custom);
@@ -4346,8 +4348,8 @@ static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
   return Op;
 }
 
-static SDValue LowerIS_FPCLASS(SDValue Op, SelectionDAG &DAG,
-                               const RISCVSubtarget &Subtarget) {
+SDValue RISCVTargetLowering::LowerIS_FPCLASS(SDValue Op,
+                                             SelectionDAG &DAG) const {
   SDLoc DL(Op);
   MVT VT = Op.getSimpleValueType();
   MVT XLenVT = Subtarget.getXLenVT();
@@ -4376,6 +4378,50 @@ static SDValue LowerIS_FPCLASS(SDValue Op, SelectionDAG &DAG,
     TDCMask |= RISCV::FPMASK_Negative_Zero;
 
   SDValue TDCMaskV = DAG.getConstant(TDCMask, DL, XLenVT);
+
+  if (VT.isVector()) {
+    SDValue Op0 = Op.getOperand(0);
+    MVT VT0 = Op.getOperand(0).getSimpleValueType();
+    MVT DstVT = VT0.changeVectorElementTypeToInteger();
+
+    if (VT.isScalableVector()) {
+      SDValue VL = DAG.getRegister(RISCV::X0, XLenVT);
+      SDValue Mask = getAllOnesMask(DstVT, VL, DL, DAG);
+      SDValue FPCLASS = DAG.getNode(RISCVISD::FCLASS_VL, DL, DstVT,
+                                    {Op0, Mask, VL}, Op->getFlags());
+      SDValue AND = DAG.getNode(ISD::AND, DL, DstVT, FPCLASS,
+                                DAG.getConstant(TDCMask, DL, DstVT));
+      return DAG.getSetCC(DL, VT, AND, DAG.getConstant(0, DL, DstVT),
+                          ISD::SETNE);
+    }
+
+    MVT ContainerVT0 = getContainerForFixedLengthVector(VT0);
+    MVT ContainerVT = getContainerForFixedLengthVector(VT);
+    MVT ContainerDstVT = getContainerForFixedLengthVector(DstVT);
+    auto [Mask, VL] =
+        getDefaultVLOps(DstVT, ContainerDstVT, DL, DAG, Subtarget);
+
+    SDValue FPCLASS = DAG.getNode(
+        RISCVISD::FCLASS_VL, DL, DAG.getVTList(ContainerDstVT, MVT::Other),
+        {convertToScalableVector(ContainerVT0, Op0, DAG, Subtarget) /*Op0*/,
+         Mask, VL},
+        Op->getFlags());
+
+    TDCMaskV = DAG.getNode(RISCVISD::VMV_V_X_VL, DL, ContainerDstVT,
+                           DAG.getUNDEF(ContainerDstVT), TDCMaskV, VL);
+    SDValue AND = DAG.getNode(RISCVISD::AND_VL, DL, ContainerDstVT, FPCLASS,
+                              TDCMaskV, DAG.getUNDEF(ContainerDstVT), Mask, VL);
+
+    SDValue SplatZero = DAG.getConstant(0, DL, Subtarget.getXLenVT());
+    SplatZero = DAG.getNode(RISCVISD::VMV_V_X_VL, DL, ContainerDstVT,
+                            DAG.getUNDEF(ContainerDstVT), SplatZero, VL);
+
+    SDValue VMSNE = DAG.getNode(RISCVISD::SETCC_VL, DL, ContainerVT,
+                                {AND, SplatZero, DAG.getCondCode(ISD::SETNE),
+                                 DAG.getUNDEF(ContainerVT), Mask, VL});
+    return convertFromScalableVector(VT, VMSNE, DAG, Subtarget);
+  }
+
   SDValue FPCLASS = DAG.getNode(RISCVISD::FPCLASS, DL, VT, Op.getOperand(0));
   SDValue AND = DAG.getNode(ISD::AND, DL, VT, FPCLASS, TDCMaskV);
   return DAG.getSetCC(DL, VT, AND, DAG.getConstant(0, DL, XLenVT),
@@ -4503,7 +4549,7 @@ SDValue RISCVTargetLowering::LowerOperation(SDValue Op,
   case ISD::INTRINSIC_VOID:
     return LowerINTRINSIC_VOID(Op, DAG);
   case ISD::IS_FPCLASS:
-    return LowerIS_FPCLASS(Op, DAG, Subtarget);
+    return LowerIS_FPCLASS(Op, DAG);
   case ISD::BITREVERSE: {
     MVT VT = Op.getSimpleValueType();
     SDLoc DL(Op);
@@ -15216,6 +15262,7 @@ const char *RISCVTargetLowering::getTargetNodeName(unsigned Opcode) const {
   NODE_NAME_CASE(FNEG_VL)
   NODE_NAME_CASE(FABS_VL)
   NODE_NAME_CASE(FSQRT_VL)
+  NODE_NAME_CASE(FCLASS_VL)
   NODE_NAME_CASE(VFMADD_VL)
   NODE_NAME_CASE(VFNMADD_VL)
   NODE_NAME_CASE(VFMSUB_VL)

diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.h b/llvm/lib/Target/RISCV/RISCVISelLowering.h
index 5ddf94f..829ff1f 100644 (file)
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.h
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.h
@@ -241,6 +241,7 @@ enum NodeType : unsigned {
   FNEG_VL,
   FABS_VL,
   FSQRT_VL,
+  FCLASS_VL,
   FCOPYSIGN_VL, // Has a merge operand
   VFCVT_RTZ_X_F_VL,
   VFCVT_RTZ_XU_F_VL,
@@ -821,6 +822,7 @@ private:
                                             SelectionDAG &DAG) const;
   SDValue lowerToScalableOp(SDValue Op, SelectionDAG &DAG, unsigned NewOpc,
                             bool HasMergeOp = false, bool HasMask = true) const;
+  SDValue LowerIS_FPCLASS(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerVPOp(SDValue Op, SelectionDAG &DAG, unsigned RISCVISDOpc,
                     bool HasMergeOp = false) const;
   SDValue lowerLogicVPOp(SDValue Op, SelectionDAG &DAG, unsigned MaskOpc,

diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td b/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
index a605412..6ba45a2 100644 (file)
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
@@ -129,6 +129,14 @@ def any_riscv_fsqrt_vl : PatFrags<(ops node:$src, node:$mask, node:$vl),
                         [(riscv_fsqrt_vl node:$src, node:$mask, node:$vl),
                          (riscv_strict_fsqrt_vl node:$src, node:$mask, node:$vl)]>;
 
+def riscv_fclass_vl : SDNode<"RISCVISD::FCLASS_VL",
+                             SDTypeProfile<1, 3, [SDTCisInt<0>, SDTCisVec<0>,
+                                                  SDTCisFP<1>, SDTCisVec<1>,
+                                                  SDTCisSameSizeAs<0, 1>,
+                                                  SDTCVecEltisVT<2, i1>,
+                                                  SDTCisSameNumEltsAs<0, 2>,
+                                                  SDTCisVT<3, XLenVT>]>>;
+
 def SDT_RISCVVecFMA_VL : SDTypeProfile<1, 5, [SDTCisSameAs<0, 1>,
                                               SDTCisSameAs<0, 2>,
                                               SDTCisSameAs<0, 3>,
@@ -1999,6 +2007,12 @@ foreach vti = AllFloatVectors in {
               (!cast<Instruction>("PseudoVFROUND_NOEXCEPT_V_" # vti.LMul.MX #"_MASK")
                     (vti.Vector (IMPLICIT_DEF)), vti.RegClass:$rs1,
                     (vti.Mask V0), GPR:$vl, vti.Log2SEW, TA_MA)>;
+  
+    // 14.14. Vector Floating-Point Classify Instruction
+    def : Pat<(riscv_fclass_vl (vti.Vector vti.RegClass:$rs2), 
+                               (vti.Mask true_mask), VLOpFrag),
+              (!cast<Instruction>("PseudoVFCLASS_V_"# vti.LMul.MX)
+                 vti.RegClass:$rs2, GPR:$vl, vti.Log2SEW)>;
   }
 }
 

diff --git a/llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfclass.ll b/llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfclass.ll
new file mode 100644 (file)
index 0000000..f507db7
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfclass.ll
@@ -0,0 +1,170 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv32 -mattr=+d,+zfh,+experimental-zvfh,+v -target-abi=ilp32d \
+; RUN:     -riscv-v-vector-bits-min=128 -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mtriple=riscv64 -mattr=+d,+zfh,+experimental-zvfh,+v -target-abi=lp64d \
+; RUN:     -riscv-v-vector-bits-min=128 -verify-machineinstrs < %s | FileCheck %s
+
+define <2 x i1> @isnan_v2f16(<2 x half> %x) {
+; CHECK-LABEL: isnan_v2f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 2, e16, mf4, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 768
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <2 x i1> @llvm.is.fpclass.v2f16(<2 x half> %x, i32 3)  ; nan
+  ret <2 x i1> %1
+}
+
+define <2 x i1> @isnan_v2f32(<2 x float> %x) {
+; CHECK-LABEL: isnan_v2f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 2, e32, mf2, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 927
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <2 x i1> @llvm.is.fpclass.v2f32(<2 x float> %x, i32 639)
+  ret <2 x i1> %1
+}
+
+
+define <4 x i1> @isnan_v4f32(<4 x float> %x) {
+; CHECK-LABEL: isnan_v4f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 768
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <4 x i1> @llvm.is.fpclass.v4f32(<4 x float> %x, i32 3)  ; nan
+  ret <4 x i1> %1
+}
+
+define <8 x i1> @isnan_v8f32(<8 x float> %x) {
+; CHECK-LABEL: isnan_v8f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 8, e32, m2, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 512
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <8 x i1> @llvm.is.fpclass.v8f32(<8 x float> %x, i32 2)
+  ret <8 x i1> %1
+}
+
+define <16 x i1> @isnan_v16f32(<16 x float> %x) {
+; CHECK-LABEL: isnan_v16f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e32, m4, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 256
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <16 x i1> @llvm.is.fpclass.v16f32(<16 x float> %x, i32 1)
+  ret <16 x i1> %1
+}
+
+define <2 x i1> @isnormal_v2f64(<2 x double> %x) {
+; CHECK-LABEL: isnormal_v2f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 2, e64, m1, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 129
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <2 x i1> @llvm.is.fpclass.v2f64(<2 x double> %x, i32 516) ; 0x204 = "inf"
+  ret <2 x i1> %1
+}
+
+define <4 x i1> @isposinf_v4f64(<4 x double> %x) {
+; CHECK-LABEL: isposinf_v4f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 128
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <4 x i1> @llvm.is.fpclass.v4f64(<4 x double> %x, i32 512) ; 0x200 = "+inf"
+  ret <4 x i1> %1
+}
+
+define <8 x i1> @isneginf_v8f64(<8 x double> %x) {
+; CHECK-LABEL: isneginf_v8f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 8, e64, m4, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    vand.vi v8, v8, 1
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <8 x i1> @llvm.is.fpclass.v8f64(<8 x double> %x, i32 4) ; "-inf"
+  ret <8 x i1> %1
+}
+
+define <16 x i1> @isfinite_v16f64(<16 x double> %x) {
+; CHECK-LABEL: isfinite_v16f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 126
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <16 x i1> @llvm.is.fpclass.v16f64(<16 x double> %x, i32 504) ; 0x1f8 = "finite"
+  ret <16 x i1> %1
+}
+
+define <16 x i1> @isposfinite_v16f64(<16 x double> %x) {
+; CHECK-LABEL: isposfinite_v16f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 112
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <16 x i1> @llvm.is.fpclass.v16f64(<16 x double> %x, i32 448) ; 0x1c0 = "+finite"
+  ret <16 x i1> %1
+}
+
+define <16 x i1> @isnegfinite_v16f64(<16 x double> %x) {
+; CHECK-LABEL: isnegfinite_v16f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    vand.vi v8, v8, 14
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <16 x i1> @llvm.is.fpclass.v16f64(<16 x double> %x, i32 56) ; 0x38 = "-finite"
+  ret <16 x i1> %1
+}
+
+define <16 x i1> @isnotfinite_v16f64(<16 x double> %x) {
+; CHECK-LABEL: isnotfinite_v16f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 897
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <16 x i1> @llvm.is.fpclass.v16f64(<16 x double> %x, i32 519) ; 0x207 = "inf|nan"
+  ret <16 x i1> %1
+}
+
+declare <2 x i1> @llvm.is.fpclass.v2f16(<2 x half>, i32)
+declare <2 x i1> @llvm.is.fpclass.v2f32(<2 x float>, i32)
+declare <4 x i1> @llvm.is.fpclass.v4f32(<4 x float>, i32)
+declare <8 x i1> @llvm.is.fpclass.v8f32(<8 x float>, i32)
+declare <16 x i1> @llvm.is.fpclass.v16f32(<16 x float>, i32)
+declare <2 x i1> @llvm.is.fpclass.v2f64(<2 x double>, i32)
+declare <4 x i1> @llvm.is.fpclass.v4f64(<4 x double>, i32)
+declare <8 x i1> @llvm.is.fpclass.v8f64(<8 x double>, i32)
+declare <16 x i1> @llvm.is.fpclass.v16f64(<16 x double>, i32)

diff --git a/llvm/test/CodeGen/RISCV/rvv/vfclass-sdnode.ll b/llvm/test/CodeGen/RISCV/rvv/vfclass-sdnode.ll
new file mode 100644 (file)
index 0000000..d0fc44a
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/rvv/vfclass-sdnode.ll
@@ -0,0 +1,169 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv32 -mattr=+d,+zfh,+experimental-zvfh,+v -target-abi=ilp32d \
+; RUN:     -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mtriple=riscv64 -mattr=+d,+zfh,+experimental-zvfh,+v -target-abi=lp64d \
+; RUN:     -verify-machineinstrs < %s | FileCheck %s
+
+define <vscale x 2 x i1> @isnan_nxv2f16(<vscale x 2 x half> %x) {
+; CHECK-LABEL: isnan_nxv2f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e16, mf2, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 768
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 2 x i1> @llvm.is.fpclass.nxv2f16(<vscale x 2 x half> %x, i32 3)  ; nan
+  ret <vscale x 2 x i1> %1
+}
+
+define <vscale x 2 x i1> @isnan_nxv2f32(<vscale x 2 x float> %x) {
+; CHECK-LABEL: isnan_nxv2f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 927
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 2 x i1> @llvm.is.fpclass.nxv2f32(<vscale x 2 x float> %x, i32 639)
+  ret <vscale x 2 x i1> %1
+}
+
+
+define <vscale x 4 x i1> @isnan_nxv4f32(<vscale x 4 x float> %x) {
+; CHECK-LABEL: isnan_nxv4f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 768
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 4 x i1> @llvm.is.fpclass.nxv4f32(<vscale x 4 x float> %x, i32 3)  ; nan
+  ret <vscale x 4 x i1> %1
+}
+
+define <vscale x 8 x i1> @isnan_nxv8f32(<vscale x 8 x float> %x) {
+; CHECK-LABEL: isnan_nxv8f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m4, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 512
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 8 x i1> @llvm.is.fpclass.nxv8f32(<vscale x 8 x float> %x, i32 2)
+  ret <vscale x 8 x i1> %1
+}
+
+define <vscale x 16 x i1> @isnan_nxv16f32(<vscale x 16 x float> %x) {
+; CHECK-LABEL: isnan_nxv16f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 256
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 16 x i1> @llvm.is.fpclass.nxv16f32(<vscale x 16 x float> %x, i32 1)
+  ret <vscale x 16 x i1> %1
+}
+
+define <vscale x 2 x i1> @isnormal_nxv2f64(<vscale x 2 x double> %x) {
+; CHECK-LABEL: isnormal_nxv2f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 129
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 2 x i1> @llvm.is.fpclass.nxv2f64(<vscale x 2 x double> %x, i32 516) ; 0x204 = "inf"
+  ret <vscale x 2 x i1> %1
+}
+
+define <vscale x 4 x i1> @isposinf_nxv4f64(<vscale x 4 x double> %x) {
+; CHECK-LABEL: isposinf_nxv4f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 128
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 4 x i1> @llvm.is.fpclass.nxv4f64(<vscale x 4 x double> %x, i32 512) ; 0x200 = "+inf"
+  ret <vscale x 4 x i1> %1
+}
+
+define <vscale x 8 x i1> @isneginf_nxv8f64(<vscale x 8 x double> %x) {
+; CHECK-LABEL: isneginf_nxv8f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e64, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    vand.vi v8, v8, 1
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 8 x i1> @llvm.is.fpclass.nxv8f64(<vscale x 8 x double> %x, i32 4) ; "-inf"
+  ret <vscale x 8 x i1> %1
+}
+
+define <vscale x 16 x i1> @isfinite_nxv16f32(<vscale x 16 x float> %x) {
+; CHECK-LABEL: isfinite_nxv16f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 126
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 16 x i1> @llvm.is.fpclass.nxv16f32(<vscale x 16 x float> %x, i32 504) ; 0x1f8 = "finite"
+  ret <vscale x 16 x i1> %1
+}
+
+define <vscale x 16 x i1> @isposfinite_nxv16f32(<vscale x 16 x float> %x) {
+; CHECK-LABEL: isposfinite_nxv16f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 112
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 16 x i1> @llvm.is.fpclass.nxv16f32(<vscale x 16 x float> %x, i32 448) ; 0x1c0 = "+finite"
+  ret <vscale x 16 x i1> %1
+}
+
+define <vscale x 16 x i1> @isnegfinite_nxv16f32(<vscale x 16 x float> %x) {
+; CHECK-LABEL: isnegfinite_nxv16f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    vand.vi v8, v8, 14
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 16 x i1> @llvm.is.fpclass.nxv16f32(<vscale x 16 x float> %x, i32 56) ; 0x38 = "-finite"
+  ret <vscale x 16 x i1> %1
+}
+
+define <vscale x 16 x i1> @isnotfinite_nxv16f32(<vscale x 16 x float> %x) {
+; CHECK-LABEL: isnotfinite_nxv16f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a0, zero, e32, m8, ta, ma
+; CHECK-NEXT:    vfclass.v v8, v8
+; CHECK-NEXT:    li a0, 897
+; CHECK-NEXT:    vand.vx v8, v8, a0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    ret
+  %1 = call <vscale x 16 x i1> @llvm.is.fpclass.nxv16f32(<vscale x 16 x float> %x, i32 519) ; 0x207 = "inf|nan"
+  ret <vscale x 16 x i1> %1
+}
+
+declare <vscale x 2 x i1> @llvm.is.fpclass.nxv2f16(<vscale x 2 x half>, i32)
+declare <vscale x 2 x i1> @llvm.is.fpclass.nxv2f32(<vscale x 2 x float>, i32)
+declare <vscale x 4 x i1> @llvm.is.fpclass.nxv4f32(<vscale x 4 x float>, i32)
+declare <vscale x 8 x i1> @llvm.is.fpclass.nxv8f32(<vscale x 8 x float>, i32)
+declare <vscale x 16 x i1> @llvm.is.fpclass.nxv16f32(<vscale x 16 x float>, i32)
+declare <vscale x 2 x i1> @llvm.is.fpclass.nxv2f64(<vscale x 2 x double>, i32)
+declare <vscale x 4 x i1> @llvm.is.fpclass.nxv4f64(<vscale x 4 x double>, i32)
+declare <vscale x 8 x i1> @llvm.is.fpclass.nxv8f64(<vscale x 8 x double>, i32)