================
@@ -0,0 +1,564 @@
+//===-- X86InstrAVX10_V2_AUX.td - AVX10 V2 AUX Instructions --*- tablegen 
-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM 
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file describes the X86 AVX10 V2 AUX instruction set, defining the
+// instructions and their encoding.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// AVX10 V2 AUX Multiclass Definitions
+//===----------------------------------------------------------------------===//
+
+// Group A multiclass: PS(f32) -> i8 truncating conversion (quarter-size 
output)
+// Output is always xmm for all VL variants.
+// Adapts avx512_vcvt_fp for each VL level with explicit dest/src type 
mappings.
+multiclass avx10_v2aux_cvt_trunc_ps2i8<bits<8> opc, string OpcodeStr,
+                                        SDPatternOperator OpNode,
+                                        SDPatternOperator MaskOpNode> {
+  let ExeDomain = SSEPackedSingle in {
+    let Uses = []<Register>, mayRaiseFPException = 0 in {
+      defm Z : avx512_vcvt_fp<opc, OpcodeStr, v16i8x_info, v16f32_info,
+                              OpNode, OpNode, WriteCvtPH2PSZ>, EVEX_V512;
+      // Z256/Z128: use null_frag because element count mismatch between
+      // dest (v16i8) and source (v8f32/v4f32) prevents avx512_vcvt_fp from
+      // generating correct masked patterns. Explicit Pat patterns below.
+      defm Z256 : avx512_vcvt_fp<opc, OpcodeStr, v16i8x_info, v8f32x_info,
+                                 null_frag, null_frag,
+                                 WriteCvtPH2PSZ, v8f32x_info.BroadcastStr,
+                                 "{y}", v8f32x_info.MemOp,
+                                 v8f32x_info.KRCWM>, EVEX_V256;
+      defm Z128 : avx512_vcvt_fp<opc, OpcodeStr, v16i8x_info, v4f32x_info,
+                                 null_frag, null_frag,
+                                 WriteCvtPH2PSZ, v4f32x_info.BroadcastStr,
+                                 "{x}", f128mem,
+                                 v4f32x_info.KRCWM>, EVEX_V128;
+    }
+  }
+
+  // InstAliases for x/y suffixes
+  def : InstAlias<OpcodeStr#"x\t{$src, $dst|$dst, $src}",
+                  (!cast<Instruction>(NAME # "Z128rr") VR128X:$dst,
+                  VR128X:$src), 0>;
+  def : InstAlias<OpcodeStr#"x\t{$src, $dst|$dst, $src}",
+                  (!cast<Instruction>(NAME # "Z128rm") VR128X:$dst,
+                  f128mem:$src), 0, "intel">;
+  def : InstAlias<OpcodeStr#"y\t{$src, $dst|$dst, $src}",
+                  (!cast<Instruction>(NAME # "Z256rr") VR128X:$dst,
+                  VR256X:$src), 0>;
+  def : InstAlias<OpcodeStr#"y\t{$src, $dst|$dst, $src}",
+                  (!cast<Instruction>(NAME # "Z256rm") VR128X:$dst,
+                  f256mem:$src), 0, "intel">;
+
+  // Explicit patterns for Z256 (8 source elements, VK8WM mask)
+  // Unmasked
+  def : Pat<(v16i8 (OpNode (v8f32 VR256X:$src))),
+            (!cast<Instruction>(NAME # "Z256rr") VR256X:$src)>;
+  // Masked (merge)
+  def : Pat<(MaskOpNode (v8f32 VR256X:$src), (v16i8 VR128X:$src0),
+                         VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rrk") VR128X:$src0, VK8WM:$mask,
+                                VR256X:$src)>;
+  // Masked (zero)
+  def : Pat<(MaskOpNode (v8f32 VR256X:$src), v16i8x_info.ImmAllZerosV,
+                         VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rrkz") VK8WM:$mask,
+                                VR256X:$src)>;
+  // Memory
+  def : Pat<(v16i8 (OpNode (loadv8f32 addr:$src))),
+            (!cast<Instruction>(NAME # "Z256rm") addr:$src)>;
+  def : Pat<(MaskOpNode (loadv8f32 addr:$src), (v16i8 VR128X:$src0),
+                         VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmk") VR128X:$src0, VK8WM:$mask,
+                                addr:$src)>;
+  def : Pat<(MaskOpNode (loadv8f32 addr:$src), v16i8x_info.ImmAllZerosV,
+                         VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmkz") VK8WM:$mask, addr:$src)>;
+  // Broadcast
+  def : Pat<(v16i8 (OpNode (v8f32 (X86VBroadcastld32 addr:$src)))),
+            (!cast<Instruction>(NAME # "Z256rmb") addr:$src)>;
+  def : Pat<(MaskOpNode (v8f32 (X86VBroadcastld32 addr:$src)),
+                          (v16i8 VR128X:$src0), VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmbk") VR128X:$src0, VK8WM:$mask,
+                                addr:$src)>;
+  def : Pat<(MaskOpNode (v8f32 (X86VBroadcastld32 addr:$src)),
+                          v16i8x_info.ImmAllZerosV, VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmbkz") VK8WM:$mask, addr:$src)>;
+
+  // Explicit patterns for Z128 (4 source elements, VK4WM mask)
+  // Unmasked
+  def : Pat<(v16i8 (OpNode (v4f32 VR128X:$src))),
+            (!cast<Instruction>(NAME # "Z128rr") VR128X:$src)>;
+  // Masked (merge)
+  def : Pat<(MaskOpNode (v4f32 VR128X:$src), (v16i8 VR128X:$src0),
+                         VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rrk") VR128X:$src0, VK4WM:$mask,
+                                VR128X:$src)>;
+  // Masked (zero)
+  def : Pat<(MaskOpNode (v4f32 VR128X:$src), v16i8x_info.ImmAllZerosV,
+                         VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rrkz") VK4WM:$mask,
+                                VR128X:$src)>;
+  // Memory
+  def : Pat<(v16i8 (OpNode (loadv4f32 addr:$src))),
+            (!cast<Instruction>(NAME # "Z128rm") addr:$src)>;
+  def : Pat<(MaskOpNode (loadv4f32 addr:$src), (v16i8 VR128X:$src0),
+                         VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmk") VR128X:$src0, VK4WM:$mask,
+                                addr:$src)>;
+  def : Pat<(MaskOpNode (loadv4f32 addr:$src), v16i8x_info.ImmAllZerosV,
+                         VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmkz") VK4WM:$mask, addr:$src)>;
+  // Broadcast
+  def : Pat<(v16i8 (OpNode (v4f32 (X86VBroadcastld32 addr:$src)))),
+            (!cast<Instruction>(NAME # "Z128rmb") addr:$src)>;
+  def : Pat<(MaskOpNode (v4f32 (X86VBroadcastld32 addr:$src)),
+                          (v16i8 VR128X:$src0), VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmbk") VR128X:$src0, VK4WM:$mask,
+                                addr:$src)>;
+  def : Pat<(MaskOpNode (v4f32 (X86VBroadcastld32 addr:$src)),
+                          v16i8x_info.ImmAllZerosV, VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmbkz") VK4WM:$mask, addr:$src)>;
+}
+
+// Group B multiclass: 3-operand bias PS(f32) -> i8 conversion (quarter-size 
output)
+// bias + f32 source -> i8 dest
+// Reuses avx10_convert_3op_packed from X86InstrAVX10.td for each VL variant.
+multiclass avx10_v2aux_cvt_3op_ps<bits<8> opc, string OpcodeStr,
+                                  SDPatternOperator OpNode,
+                                  SDPatternOperator MaskOpNode> {
+  // Z (512-bit): bias=v64i8(zmm), src=v16f32(zmm), dst=v16i8(xmm)
+  // Element counts match (16), so vselect_mask works directly.
+  defm Z : avx10_convert_3op_packed<opc, OpcodeStr, v16i8x_info,
+             v64i8_info, v16f32_info, OpNode, OpNode, WriteCvtPH2PSZ>,
+             EVEX_V512, EVEX_CD8<32, CD8VF>;
+  // Z256/Z128: use null_frag because element count mismatch between
+  // dest (v16i8) and source (v8f32/v4f32) prevents vselect_mask from
+  // generating correct masked patterns. Explicit Pat patterns below.
+  defm Z256 : avx10_convert_3op_packed<opc, OpcodeStr, v16i8x_info,
+                v32i8x_info, v8f32x_info,
+                null_frag, null_frag, WriteCvtPH2PSZ>,
+                EVEX_V256, EVEX_CD8<32, CD8VF>;
+  defm Z128 : avx10_convert_3op_packed<opc, OpcodeStr, v16i8x_info,
+                v16i8x_info, v4f32x_info,
+                null_frag, null_frag, WriteCvtPH2PSZ>,
+                EVEX_V128, EVEX_CD8<32, CD8VF>;
+
+  // Explicit patterns for Z256 (8 source elements, VK8WM mask)
+  def : Pat<(v16i8 (OpNode (v32i8 VR256X:$src1), (v8f32 VR256X:$src2))),
+            (!cast<Instruction>(NAME # "Z256rr") VR256X:$src1, VR256X:$src2)>;
+  def : Pat<(MaskOpNode (v32i8 VR256X:$src1), (v8f32 VR256X:$src2),
+                         (v16i8 VR128X:$src0), VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rrk") VR128X:$src0, VK8WM:$mask,
+                                VR256X:$src1, VR256X:$src2)>;
+  def : Pat<(MaskOpNode (v32i8 VR256X:$src1), (v8f32 VR256X:$src2),
+                         v16i8x_info.ImmAllZerosV, VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rrkz") VK8WM:$mask,
+                                VR256X:$src1, VR256X:$src2)>;
+  // Memory
+  def : Pat<(v16i8 (OpNode (v32i8 VR256X:$src1), (loadv8f32 addr:$src2))),
+            (!cast<Instruction>(NAME # "Z256rm") VR256X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v32i8 VR256X:$src1), (loadv8f32 addr:$src2),
+                         (v16i8 VR128X:$src0), VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmk") VR128X:$src0, VK8WM:$mask,
+                                VR256X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v32i8 VR256X:$src1), (loadv8f32 addr:$src2),
+                         v16i8x_info.ImmAllZerosV, VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmkz") VK8WM:$mask,
+                                VR256X:$src1, addr:$src2)>;
+  // Broadcast
+  def : Pat<(v16i8 (OpNode (v32i8 VR256X:$src1),
+                            (v8f32 (X86VBroadcastld32 addr:$src2)))),
+            (!cast<Instruction>(NAME # "Z256rmb") VR256X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v32i8 VR256X:$src1),
+                          (v8f32 (X86VBroadcastld32 addr:$src2)),
+                          (v16i8 VR128X:$src0), VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmbk") VR128X:$src0, VK8WM:$mask,
+                                VR256X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v32i8 VR256X:$src1),
+                          (v8f32 (X86VBroadcastld32 addr:$src2)),
+                          v16i8x_info.ImmAllZerosV, VK8WM:$mask),
+            (!cast<Instruction>(NAME # "Z256rmbkz") VK8WM:$mask,
+                                VR256X:$src1, addr:$src2)>;
+
+  // Explicit patterns for Z128 (4 source elements, VK4WM mask)
+  def : Pat<(v16i8 (OpNode (v16i8 VR128X:$src1), (v4f32 VR128X:$src2))),
+            (!cast<Instruction>(NAME # "Z128rr") VR128X:$src1, VR128X:$src2)>;
+  def : Pat<(MaskOpNode (v16i8 VR128X:$src1), (v4f32 VR128X:$src2),
+                         (v16i8 VR128X:$src0), VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rrk") VR128X:$src0, VK4WM:$mask,
+                                VR128X:$src1, VR128X:$src2)>;
+  def : Pat<(MaskOpNode (v16i8 VR128X:$src1), (v4f32 VR128X:$src2),
+                         v16i8x_info.ImmAllZerosV, VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rrkz") VK4WM:$mask,
+                                VR128X:$src1, VR128X:$src2)>;
+  // Memory
+  def : Pat<(v16i8 (OpNode (v16i8 VR128X:$src1), (loadv4f32 addr:$src2))),
+            (!cast<Instruction>(NAME # "Z128rm") VR128X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v16i8 VR128X:$src1), (loadv4f32 addr:$src2),
+                         (v16i8 VR128X:$src0), VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmk") VR128X:$src0, VK4WM:$mask,
+                                VR128X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v16i8 VR128X:$src1), (loadv4f32 addr:$src2),
+                         v16i8x_info.ImmAllZerosV, VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmkz") VK4WM:$mask,
+                                VR128X:$src1, addr:$src2)>;
+  // Broadcast
+  def : Pat<(v16i8 (OpNode (v16i8 VR128X:$src1),
+                            (v4f32 (X86VBroadcastld32 addr:$src2)))),
+            (!cast<Instruction>(NAME # "Z128rmb") VR128X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v16i8 VR128X:$src1),
+                          (v4f32 (X86VBroadcastld32 addr:$src2)),
+                          (v16i8 VR128X:$src0), VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmbk") VR128X:$src0, VK4WM:$mask,
+                                VR128X:$src1, addr:$src2)>;
+  def : Pat<(MaskOpNode (v16i8 VR128X:$src1),
+                          (v4f32 (X86VBroadcastld32 addr:$src2)),
+                          v16i8x_info.ImmAllZerosV, VK4WM:$mask),
+            (!cast<Instruction>(NAME # "Z128rmbkz") VK4WM:$mask,
+                                VR128X:$src1, addr:$src2)>;
+}
+
+// Group C multiclass: i8 -> f32 expanding conversion (4x expansion, no 
broadcast)
+multiclass avx10_v2aux_cvt_2op_i8_to_f32<bits<8> opc, string OpcodeStr,
+                                         SDNode OpNode> {
+  defm Z : avx10_convert_2op_nomb_packed<opc, OpcodeStr, v16f32_info,
+                                         v16i8x_info, OpNode, f128mem,
+                                         WriteCvtPH2PSZ>, EVEX_V512;
+  defm Z128 : avx10_convert_2op_nomb_packed<opc, OpcodeStr, v4f32x_info,
+                                            v16i8x_info, OpNode, f32mem,
+                                            WriteCvtPH2PSZ>, EVEX_V128;
+  defm Z256 : avx10_convert_2op_nomb_packed<opc, OpcodeStr, v8f32x_info,
+                                            v16i8x_info, OpNode, f64mem,
+                                            WriteCvtPH2PSZ>, EVEX_V256;
+}
+
+// Group D multiclass: Truncating conversion (reg/mem dest, no masking)
+// Uses MRMDestReg/MRMDestMem since destination can be memory operand.
+// Source is in reg field, destination is in r/m field.
+multiclass avx10_v2aux_cvt_trunc<bits<8> opc, string OpcodeStr,
+                                  X86VectorVTInfo SrcInfo,
+                                  X86VectorVTInfo DestInfo,
+                                  X86MemOperand x86memop,
+                                  SDPatternOperator OpNode> {
+  let hasSideEffects = 0 in {
+    def rr : I<opc, MRMDestReg, (outs DestInfo.RC:$dst),
+               (ins SrcInfo.RC:$src),
+               OpcodeStr # "\t{$src, $dst|$dst, $src}", []>,
+               EVEX, Sched<[WriteCvtPH2PSZ]>;
+    let mayStore = 1 in
+    def mr : I<opc, MRMDestMem, (outs),
+               (ins x86memop:$dst, SrcInfo.RC:$src),
+               OpcodeStr # "\t{$src, $dst|$dst, $src}", []>,
+               EVEX, Sched<[WriteCvtPH2PSZ.Folded]>;
+  }
+
+  // Intrinsic pattern
+  def : Pat<(DestInfo.VT (OpNode (SrcInfo.VT SrcInfo.RC:$src))),
+            (!cast<Instruction>(NAME # "rr") SrcInfo.RC:$src)>;
+}
+
+// Group F helper: expanding conversion with masking, no broadcast (reg+mem)
+multiclass avx10_v2aux_cvt_expand_masked<bits<8> opc, string OpcodeStr,
+                                         X86VectorVTInfo _dest,
+                                         X86VectorVTInfo _src,
+                                         X86MemOperand x86memop,
+                                         SDPatternOperator OpNode> {
+  let ExeDomain = _dest.ExeDomain in {
+    defm rr : AVX512_maskable<opc, MRMSrcReg, _dest,
+                (outs _dest.RC:$dst),
+                (ins _src.RC:$src),
+                OpcodeStr, "$src", "$src",
+                (_dest.VT (OpNode (_src.VT _src.RC:$src)))>,
+               EVEX, Sched<[WriteCvtPH2PSZ]>;
+    let mayLoad = 1 in
+    defm rm : AVX512_maskable<opc, MRMSrcMem, _dest,
+                (outs _dest.RC:$dst),
+                (ins x86memop:$src),
+                OpcodeStr, "$src", "$src",
+                (_dest.VT (OpNode (_src.VT (load addr:$src))))>,
+               EVEX, Sched<[WriteCvtPH2PSZ.Folded]>;
+  }
+}
+
+// Group F helper: widening conversion with masking (reg-only, 6-bit to 8-bit)
+multiclass avx10_v2aux_cvt_widen_masked<bits<8> opc, string OpcodeStr,
+                                        X86VectorVTInfo _,
+                                        SDPatternOperator OpNode> {
+  let ExeDomain = _.ExeDomain in {
+    defm rr : AVX512_maskable<opc, MRMSrcReg, _,
+                (outs _.RC:$dst),
+                (ins _.RC:$src),
+                OpcodeStr, "$src", "$src",
+                (_.VT (OpNode (_.VT _.RC:$src)))>,
+               EVEX, Sched<[WriteCvtPH2PSZ]>;
+  }
+}
+
+// Group H multiclass: Byte unpack with immediate
+multiclass avx10_v2aux_unpackb<bits<8> opc, string OpcodeStr,
+                                X86VectorVTInfo _,
+                                SDPatternOperator OpNode> {
+  let ImmT = Imm8 in {
+    defm rri : AVX512_maskable<opc, MRMSrcReg, _,
+                    (outs _.RC:$dst),
+                    (ins _.RC:$src1, u8imm:$src2),
+                    OpcodeStr, "$src2, $src1", "$src1, $src2",
+                    (_.VT (OpNode (_.VT _.RC:$src1), (i8 timm:$src2)))>,
+                    Sched<[WriteShuffle]>;
+    let mayLoad = 1 in
+    defm rmi : AVX512_maskable<opc, MRMSrcMem, _,
+                    (outs _.RC:$dst),
+                    (ins _.MemOp:$src1, u8imm:$src2),
+                    OpcodeStr, "$src2, $src1", "$src1, $src2",
+                    (_.VT (OpNode (_.VT (load addr:$src1)), (i8 timm:$src2)))>,
+                    Sched<[WriteShuffle.Folded]>;
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// AVX10 V2 AUX Instruction Definitions
+//===----------------------------------------------------------------------===//
+
+//-------------------------------------------------
+// Group A: PS->8bit truncating conversions
+//-------------------------------------------------
+
+let Predicates = [HasAVX10_V2_AUX] in {
+  defm VCVTPS2BF8 : avx10_v2aux_cvt_trunc_ps2i8<0x39, "vcvtps2bf8",
+                                                X86vcvtps2bf8, X86vmcvtps2bf8>,
+                    T_MAP5, XS, EVEX_CD8<32, CD8VF>;
+  defm VCVTPS2BF8S : avx10_v2aux_cvt_trunc_ps2i8<0x3B, "vcvtps2bf8s",
+                                                 X86vcvtps2bf8s, 
X86vmcvtps2bf8s>,
+                     T_MAP5, XS, EVEX_CD8<32, CD8VF>;
+  defm VCVTPS2HF8 : avx10_v2aux_cvt_trunc_ps2i8<0x38, "vcvtps2hf8",
+                                                X86vcvtps2hf8, X86vmcvtps2hf8>,
+                    T_MAP5, XS, EVEX_CD8<32, CD8VF>;
+  defm VCVTPS2HF8S : avx10_v2aux_cvt_trunc_ps2i8<0x3A, "vcvtps2hf8s",
+                                                 X86vcvtps2hf8s, 
X86vmcvtps2hf8s>,
+                     T_MAP5, XS, EVEX_CD8<32, CD8VF>;
+  defm VCVTROPS2HF8 : avx10_v2aux_cvt_trunc_ps2i8<0x38, "vcvtrops2hf8",
+                                                  X86vcvtrops2hf8, 
X86vmcvtrops2hf8>,
+                      T_MAP5, PD, EVEX_CD8<32, CD8VF>;
+  defm VCVTROPS2HF8S : avx10_v2aux_cvt_trunc_ps2i8<0x3A, "vcvtrops2hf8s",
+                                                   X86vcvtrops2hf8s, 
X86vmcvtrops2hf8s>,
+                       T_MAP5, PD, EVEX_CD8<32, CD8VF>;
+}
+
+//-------------------------------------------------
+// Group B: Bias PS->8bit conversions (3-operand)
+//-------------------------------------------------
+
+let Predicates = [HasAVX10_V2_AUX] in {
+  defm VCVTBIASPS2BF8 : avx10_v2aux_cvt_3op_ps<0x39, "vcvtbiasps2bf8",
+                                               X86vcvtbiasps2bf8,
+                                               X86vmcvtbiasps2bf8>,
+                        T_MAP5, PS;
+  defm VCVTBIASPS2BF8S : avx10_v2aux_cvt_3op_ps<0x3B, "vcvtbiasps2bf8s",
+                                                X86vcvtbiasps2bf8s,
+                                                X86vmcvtbiasps2bf8s>,
+                         T_MAP5, PS;
+  defm VCVTBIASPS2HF8 : avx10_v2aux_cvt_3op_ps<0x38, "vcvtbiasps2hf8",
+                                               X86vcvtbiasps2hf8,
+                                               X86vmcvtbiasps2hf8>,
+                        T_MAP5, PS;
+  defm VCVTBIASPS2HF8S : avx10_v2aux_cvt_3op_ps<0x3A, "vcvtbiasps2hf8s",
+                                                X86vcvtbiasps2hf8s,
+                                                X86vmcvtbiasps2hf8s>,
+                         T_MAP5, PS;
+}
+
+//-------------------------------------------------
+// Group C: 8bit->PS expanding conversions
+//-------------------------------------------------
+
+let Predicates = [HasAVX10_V2_AUX] in {
+  defm VCVTBF82PS : avx10_v2aux_cvt_2op_i8_to_f32<0x36, "vcvtbf82ps",
+                                                  X86vcvtbf82ps>,
+                    PS, T_MAP5, EVEX, EVEX_CD8<32, CD8VQ>, REX_W;
+  defm VCVTHF82PS : avx10_v2aux_cvt_2op_i8_to_f32<0x36, "vcvthf82ps",
+                                                  X86vcvthf82ps>,
+                    PS, T_MAP5, EVEX, EVEX_CD8<32, CD8VQ>;
+}
+
+//-------------------------------------------------
+// Group D: BF8/HF8->BF4S truncating conversions
+//-------------------------------------------------
+
+let Predicates = [HasAVX10_V2_AUX] in {
+  defm VCVTBF82BF4SZ    : avx10_v2aux_cvt_trunc<0x3D, "vcvtbf82bf4s",
+                                                v64i8_info, v32i8x_info, 
i256mem,
+                                                
int_x86_avx10_vcvtbf82bf4s_512>,
+                          T_MAP5, XS, REX_W, EVEX_V512, EVEX_CD8<8, CD8VH>;
+  defm VCVTBF82BF4SZ256 : avx10_v2aux_cvt_trunc<0x3D, "vcvtbf82bf4s",
+                                                v32i8x_info, v16i8x_info, 
i128mem,
+                                                
int_x86_avx10_vcvtbf82bf4s_256>,
+                          T_MAP5, XS, REX_W, EVEX_V256, EVEX_CD8<8, CD8VH>;
+  defm VCVTBF82BF4SZ128 : avx10_v2aux_cvt_trunc<0x3D, "vcvtbf82bf4s",
+                                                v16i8x_info, v16i8x_info, 
i64mem,
+                                                
int_x86_avx10_vcvtbf82bf4s_128>,
+                          T_MAP5, XS, REX_W, EVEX_V128, EVEX_CD8<8, CD8VH>;
+
+  defm VCVTHF82BF4SZ    : avx10_v2aux_cvt_trunc<0x3D, "vcvthf82bf4s",
+                                                v64i8_info, v32i8x_info, 
i256mem,
+                                                
int_x86_avx10_vcvthf82bf4s_512>,
+                          T_MAP5, XS, EVEX_V512, EVEX_CD8<8, CD8VH>;
+  defm VCVTHF82BF4SZ256 : avx10_v2aux_cvt_trunc<0x3D, "vcvthf82bf4s",
+                                                v32i8x_info, v16i8x_info, 
i128mem,
+                                                
int_x86_avx10_vcvthf82bf4s_256>,
+                          T_MAP5, XS, EVEX_V256, EVEX_CD8<8, CD8VH>;
+  defm VCVTHF82BF4SZ128 : avx10_v2aux_cvt_trunc<0x3D, "vcvthf82bf4s",
+                                                v16i8x_info, v16i8x_info, 
i64mem,
+                                                
int_x86_avx10_vcvthf82bf4s_128>,
+                          T_MAP5, XS, EVEX_V128, EVEX_CD8<8, CD8VH>;
+
+  // Memory store patterns for VCVTBF82BF4S
+  def : Pat<(int_x86_avx10_vcvtbf82bf4s_512_mem addr:$dst, VR512:$src),
+            (VCVTBF82BF4SZmr addr:$dst, VR512:$src)>;
+  def : Pat<(int_x86_avx10_vcvtbf82bf4s_256_mem addr:$dst, VR256X:$src),
+            (VCVTBF82BF4SZ256mr addr:$dst, VR256X:$src)>;
+  def : Pat<(int_x86_avx10_vcvtbf82bf4s_128_mem addr:$dst, VR128X:$src),
+            (VCVTBF82BF4SZ128mr addr:$dst, VR128X:$src)>;
+
+  // Memory store patterns for VCVTHF82BF4S
+  def : Pat<(int_x86_avx10_vcvthf82bf4s_512_mem addr:$dst, VR512:$src),
+            (VCVTHF82BF4SZmr addr:$dst, VR512:$src)>;
+  def : Pat<(int_x86_avx10_vcvthf82bf4s_256_mem addr:$dst, VR256X:$src),
+            (VCVTHF82BF4SZ256mr addr:$dst, VR256X:$src)>;
+  def : Pat<(int_x86_avx10_vcvthf82bf4s_128_mem addr:$dst, VR128X:$src),
+            (VCVTHF82BF4SZ128mr addr:$dst, VR128X:$src)>;
+}
+
+//-------------------------------------------------
+// Group E: Narrowing reg-only conversions (8-bit to 6-bit, no masking)
+//-------------------------------------------------
+
+// Group E multiclass: Narrowing conversion reg-only (no masking, 8-bit to 
6-bit)
+multiclass avx10_v2aux_cvt_narrow<bits<8> opc, string OpcodeStr,
+                                  X86VectorVTInfo Info,
+                                  SDPatternOperator OpNode> {
+  let hasSideEffects = 0 in {
+    def rr : I<opc, MRMSrcReg, (outs Info.RC:$dst),
+               (ins Info.RC:$src),
+               OpcodeStr # "\t{$src, $dst|$dst, $src}", []>,
+             EVEX, Sched<[WriteCvtPH2PSZ]>;
+  }
+
+  // Intrinsic pattern
+  def : Pat<(Info.VT (OpNode (Info.VT Info.RC:$src))),
+            (!cast<Instruction>(NAME # "rr") Info.RC:$src)>;
+}
+
+let Predicates = [HasAVX10_V2_AUX] in {
+  defm VCVTBF82BF6SZ    : avx10_v2aux_cvt_narrow<0x3E, "vcvtbf82bf6s",
+                                                 v64i8_info, 
int_x86_avx10_vcvtbf82bf6s_512>,
+                          T_MAP5, XS, REX_W, EVEX_V512;
+  defm VCVTBF82BF6SZ256 : avx10_v2aux_cvt_narrow<0x3E, "vcvtbf82bf6s",
+                                                 v32i8x_info, 
int_x86_avx10_vcvtbf82bf6s_256>,
+                          T_MAP5, XS, REX_W, EVEX_V256;
+  defm VCVTBF82BF6SZ128 : avx10_v2aux_cvt_narrow<0x3E, "vcvtbf82bf6s",
+                                                 v16i8x_info, 
int_x86_avx10_vcvtbf82bf6s_128>,
+                          T_MAP5, XS, REX_W, EVEX_V128;
+
+  defm VCVTHF82HF6SZ    : avx10_v2aux_cvt_narrow<0x3C, "vcvthf82hf6s",
+                                                 v64i8_info, 
int_x86_avx10_vcvthf82hf6s_512>,
+                          T_MAP5, XS, EVEX_V512;
+  defm VCVTHF82HF6SZ256 : avx10_v2aux_cvt_narrow<0x3C, "vcvthf82hf6s",
+                                                 v32i8x_info, 
int_x86_avx10_vcvthf82hf6s_256>,
+                          T_MAP5, XS, EVEX_V256;
+  defm VCVTHF82HF6SZ128 : avx10_v2aux_cvt_narrow<0x3C, "vcvthf82hf6s",
+                                                 v16i8x_info, 
int_x86_avx10_vcvthf82hf6s_128>,
+                          T_MAP5, XS, EVEX_V128;
+}
+
+//-------------------------------------------------
+// Group F: Expanding/widening conversions with masking
+//-------------------------------------------------
+
+// VCVTBF42HF8: expanding (2x), with masking, no broadcast
+// Z128: xmm{k}{z}, xmm/m64  Z256: ymm{k}{z}, xmm/m128  Z: zmm{k}{z}, ymm/m256
+let Predicates = [HasAVX10_V2_AUX] in {
+  defm VCVTBF42HF8Z : avx10_v2aux_cvt_expand_masked<0x37, "vcvtbf42hf8",
+                                                    v64i8_info, v32i8x_info, 
f256mem,
+                                                    
int_x86_avx10_vcvtbf42hf8_512>,
+                      T_MAP5, PS, EVEX_V512, EVEX_CD8<8, CD8VH>;
+  defm VCVTBF42HF8Z128 : avx10_v2aux_cvt_expand_masked<0x37, "vcvtbf42hf8",
+                                                       v16i8x_info, 
v16i8x_info, f64mem,
+                                                       
int_x86_avx10_vcvtbf42hf8_128>,
+                         T_MAP5, PS, EVEX_V128, EVEX_CD8<8, CD8VH>;
+  defm VCVTBF42HF8Z256 : avx10_v2aux_cvt_expand_masked<0x37, "vcvtbf42hf8",
+                                                       v32i8x_info, 
v16i8x_info, f128mem,
+                                                       
int_x86_avx10_vcvtbf42hf8_256>,
+                         T_MAP5, PS, EVEX_V256, EVEX_CD8<8, CD8VH>;
+}
+let Predicates = [HasAVX10_V2_AUX] in {
+  // VCVTBF62HF8: widening (6-bit to 8-bit) with masking, reg-only (66.MAP5.W1)
+  defm VCVTBF62HF8Z    : avx10_v2aux_cvt_widen_masked<0x37, "vcvtbf62hf8",
+                                                      v64i8_info,
+                                                      
int_x86_avx10_vcvtbf62hf8_512>,
+                         T_MAP5, PD, REX_W, EVEX_V512;
+  defm VCVTBF62HF8Z256 : avx10_v2aux_cvt_widen_masked<0x37, "vcvtbf62hf8",
+                                                      v32i8x_info,
+                                                      
int_x86_avx10_vcvtbf62hf8_256>,
+                         T_MAP5, PD, REX_W, EVEX_V256;
+  defm VCVTBF62HF8Z128 : avx10_v2aux_cvt_widen_masked<0x37, "vcvtbf62hf8",
+                                                      v16i8x_info,
+                                                      
int_x86_avx10_vcvtbf62hf8_128>,
+                         T_MAP5, PD, REX_W, EVEX_V128;
+
+  // VCVTHF62HF8: widening (6-bit to 8-bit) with masking, reg-only (66.MAP5.W0)
+  defm VCVTHF62HF8Z    : avx10_v2aux_cvt_widen_masked<0x37, "vcvthf62hf8",
+                                                      v64i8_info,
+                                                      
int_x86_avx10_vcvthf62hf8_512>,
+                         T_MAP5, PD, EVEX_V512;
+  defm VCVTHF62HF8Z256 : avx10_v2aux_cvt_widen_masked<0x37, "vcvthf62hf8",
+                                                      v32i8x_info,
+                                                      
int_x86_avx10_vcvthf62hf8_256>,
+                         T_MAP5, PD, EVEX_V256;
+  defm VCVTHF62HF8Z128 : avx10_v2aux_cvt_widen_masked<0x37, "vcvthf62hf8",
+                                                      v16i8x_info,
+                                                      
int_x86_avx10_vcvthf62hf8_128>,
+                         T_MAP5, PD, EVEX_V128;
+}
+
+//-------------------------------------------------
+// Group G: VPMOVSSDB - Integer DWord->Byte symmetric signed saturation
+// F3.0F38.W0 0x41
----------------
ganeshgit wrote:

Done.

https://github.com/llvm/llvm-project/pull/206888
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