[llvm-branch-commits] [llvm] AMDGPU: MC support for v_cvt_scale_[f16|f32]_fp8 of gfx950. (PR #117380)

Matt Arsenault via llvm-branch-commits llvm-branch-commits at lists.llvm.org
Fri Nov 22 13:11:23 PST 2024


https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/117380

OPSEL ASM Syntax: opsel:[x,y,z]
where,
    opsel[x] = Inst{11} = src0_modifier{2}
    opsel[y] = Inst{12} = src1_modifier{2}
    opsel[z] = Inst{14} = src0_modifier{3}
Note: Conventional Inst{13} i.e. OPSEL[2] is ignored in asm syntax.

Co-authored-by: Pravin Jagtap <Pravin.Jagtap at amd.com>

>From cfcbaca51ba6091e7387f3f883de0784b5bd0280 Mon Sep 17 00:00:00 2001
From: Pravin Jagtap <Pravin.Jagtap at amd.com>
Date: Sat, 6 Apr 2024 02:35:49 -0400
Subject: [PATCH] AMDGPU: MC support for v_cvt_scale_[f16|f32]_fp8 of gfx950.

OPSEL ASM Syntax: opsel:[x,y,z]
where,
    opsel[x] = Inst{11} = src0_modifier{2}
    opsel[y] = Inst{12} = src1_modifier{2}
    opsel[z] = Inst{14} = src0_modifier{3}
Note: Conventional Inst{13} i.e. OPSEL[2] is ignored in asm syntax.

Co-authored-by: Pravin Jagtap <Pravin.Jagtap at amd.com>
---
 llvm/lib/Target/AMDGPU/AMDGPU.td              |  14 +-
 llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h      |   3 +
 llvm/lib/Target/AMDGPU/VOP3Instructions.td    |  22 ++
 llvm/test/MC/AMDGPU/gfx950_asm_features.s     | 192 ++++++++++++++++++
 .../Disassembler/AMDGPU/gfx950_dasm_vop3.txt  | 144 +++++++++++++
 5 files changed, 373 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index 2b8b41371fef8b..5a01001fd906d3 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -384,11 +384,17 @@ def FeaturePermlane32Swap : SubtargetFeature<"permlane32-swap",
   "Has v_permlane32_swap_b32 instructions"
 >;
 
+def FeatureFP8ConversionScaleInsts : SubtargetFeature<"fp8-cvt-scale-insts",
+  "HasFP8ConversionScaleInsts",
+  "true",
+  "Has fp8 conversion scale instructions"
+>;
+
 def FeatureGFX950Insts : SubtargetFeature<"gfx950-insts",
   "GFX950Insts",
   "true",
   "Additional instructions for GFX950+",
-  [FeaturePermlane16Swap, FeaturePermlane32Swap]
+  [FeaturePermlane16Swap, FeaturePermlane32Swap, FeatureFP8ConversionScaleInsts]
 >;
 
 def FeatureGFX10Insts : SubtargetFeature<"gfx10-insts",
@@ -1531,7 +1537,8 @@ def FeatureISAVersion9_5_Common : FeatureSet<
    FeatureGFX950Insts,
    FeaturePrngInst,
    FeatureBF16ConversionInsts,
-   FeatureBitOp3Insts
+   FeatureBitOp3Insts,
+   FeatureFP8ConversionScaleInsts
    ])>;
 
 def FeatureISAVersion9_4_0 : FeatureSet<
@@ -2405,6 +2412,9 @@ def HasBitOp3Insts : Predicate<"Subtarget->hasBitOp3Insts()">,
 def HasPrngInst : Predicate<"Subtarget->hasPrngInst()">,
   AssemblerPredicate<(all_of FeaturePrngInst)>;
 
+def HasFP8ConversionScaleInsts : Predicate<"Subtarget->hasFP8ConversionScaleInsts()">,
+  AssemblerPredicate<(all_of FeatureFP8ConversionScaleInsts)>;
+
 def HasGDS : Predicate<"Subtarget->hasGDS()">;
 
 def HasGWS : Predicate<"Subtarget->hasGWS()">;
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
index ece26a4adb3754..c5aaed3a6b9ae8 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
@@ -50,6 +50,7 @@ class AMDGPUSubtarget {
   bool GCN3Encoding = false;
   bool Has16BitInsts = false;
   bool HasTrue16BitInsts = false;
+  bool HasFP8ConversionScaleInsts = false;
   bool EnableRealTrue16Insts = false;
   bool HasBF16ConversionInsts = false;
   bool HasMadMixInsts = false;
@@ -175,6 +176,8 @@ class AMDGPUSubtarget {
     return HasMadMixInsts;
   }
 
+  bool hasFP8ConversionScaleInsts() const { return HasFP8ConversionScaleInsts; }
+
   bool hasMadMacF32Insts() const {
     return HasMadMacF32Insts || !isGCN();
   }
diff --git a/llvm/lib/Target/AMDGPU/VOP3Instructions.td b/llvm/lib/Target/AMDGPU/VOP3Instructions.td
index 60aaa05d59b40a..2534f26492e6ea 100644
--- a/llvm/lib/Target/AMDGPU/VOP3Instructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP3Instructions.td
@@ -874,6 +874,24 @@ class VOP3_BITOP3_Profile<VOPProfile pfl, VOP3Features f> : VOP3_Profile<pfl, f>
   let AsmVOP3OpSel = !subst("$op_sel", "$bitop3$op_sel", getAsmVOP3OpSel<3, 0, 0, 0, 0, 0>.ret);
 }
 
+class VOP3_CVT_SCALE_F1632_FP8BF8_Profile<ValueType DstTy> : VOP3_Profile<VOPProfile<[DstTy, i32, f32, untyped]>,
+                                              VOP3_OPSEL> {
+  let InsVOP3OpSel = (ins FP32InputMods:$src0_modifiers, Src0RC64:$src0,
+                          FP32InputMods:$src1_modifiers, Src1RC64:$src1,
+                          op_sel0:$op_sel);
+  let HasClamp = 0;
+  let HasSrc2 = 0;
+  let HasSrc2Mods = 0;
+  let HasExtVOP3DPP = 0;
+  let HasOpSel = 1;
+  let HasOMod = 0;
+}
+
+let SubtargetPredicate = HasFP8ConversionScaleInsts, mayRaiseFPException = 0 in {
+  defm V_CVT_SCALEF32_F16_FP8 : VOP3Inst<"v_cvt_scalef32_f16_fp8", VOP3_CVT_SCALE_F1632_FP8BF8_Profile<f16>>;
+  defm V_CVT_SCALEF32_F32_FP8 : VOP3Inst<"v_cvt_scalef32_f32_fp8", VOP3_CVT_SCALE_F1632_FP8BF8_Profile<f32>>;
+}
+
 let SubtargetPredicate = isGFX10Plus in {
   let isCommutable = 1, isReMaterializable = 1 in {
     defm V_XOR3_B32 : VOP3Inst <"v_xor3_b32", VOP3_Profile<VOP_I32_I32_I32_I32>>;
@@ -1796,3 +1814,7 @@ defm V_CVT_SR_BF8_F32 : VOP3OpSel_Real_gfx9_forced_opsel2 <0x2a5>;
 
 defm V_BITOP3_B16         : VOP3_Real_BITOP3_gfx9<0x233, "v_bitop3_b16">;
 defm V_BITOP3_B32         : VOP3_Real_BITOP3_gfx9<0x234, "v_bitop3_b32">;
+let OtherPredicates = [HasFP8ConversionScaleInsts] in {
+defm V_CVT_SCALEF32_F16_FP8 : VOP3OpSel_Real_gfx9 <0x24a>;
+defm V_CVT_SCALEF32_F32_FP8 : VOP3OpSel_Real_gfx9 <0x23b>;
+}
diff --git a/llvm/test/MC/AMDGPU/gfx950_asm_features.s b/llvm/test/MC/AMDGPU/gfx950_asm_features.s
index ad1ce40ddd6a45..55ca8f94600995 100644
--- a/llvm/test/MC/AMDGPU/gfx950_asm_features.s
+++ b/llvm/test/MC/AMDGPU/gfx950_asm_features.s
@@ -117,3 +117,195 @@ v_permlane32_swap_b32_e64 v1, v2 bound_ctrl:1 fi:1
 
 // FIXME: Swapped order not accepted
 // v_permlane32_swap_b32 v1, v2 fi:1 bound_ctrl:1
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3       ; encoding: [0x01,0x00,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,0,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x4a,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s1, v3       ; encoding: [0x01,0x00,0x4a,0xd2,0x01,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s1, v3
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x4a,0xd2,0x02,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s2, v3 op_sel:[1,0,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s3, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x4a,0xd2,0x03,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s3, v3 op_sel:[0,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s4, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x4a,0xd2,0x04,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s4, v3 op_sel:[1,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s1, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x4a,0xd2,0x01,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s1, v3 op_sel:[0,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x4a,0xd2,0x02,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s2, v3 op_sel:[1,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s3, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0x03,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s3, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, s4, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x4a,0xd2,0x04,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, s4, v3 op_sel:[1,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 11, v3       ; encoding: [0x01,0x00,0x4a,0xd2,0x8b,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 11, v3
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 22, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x4a,0xd2,0x96,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 22, v3 op_sel:[1,0,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 33, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x4a,0xd2,0xa1,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 33, v3 op_sel:[0,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 44, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x4a,0xd2,0xac,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 44, v3 op_sel:[1,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 11, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0x8b,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 11, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 22, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x4a,0xd2,0x96,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 22, v3 op_sel:[1,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 33, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0xa1,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 33, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f16_fp8 v1, 44, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x4a,0xd2,0xac,0x06,0x02,0x00]
+v_cvt_scalef32_f16_fp8 v1, 44, v3 op_sel:[1,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3       ; encoding: [0x01,0x00,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,0,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x3b,0xd2,0x02,0x07,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s1, v3       ; encoding: [0x01,0x00,0x3b,0xd2,0x01,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s1, v3
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x3b,0xd2,0x02,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s2, v3 op_sel:[1,0,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s3, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x3b,0xd2,0x03,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s3, v3 op_sel:[0,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s4, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x3b,0xd2,0x04,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s4, v3 op_sel:[1,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s1, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x3b,0xd2,0x01,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s1, v3 op_sel:[0,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x3b,0xd2,0x02,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s2, v3 op_sel:[1,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s3, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x3b,0xd2,0x03,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s3, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, s4, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x3b,0xd2,0x04,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, s4, v3 op_sel:[1,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 11, v3       ; encoding: [0x01,0x00,0x3b,0xd2,0x8b,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 11, v3
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 22, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x3b,0xd2,0x96,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 22, v3 op_sel:[1,0,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 33, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x3b,0xd2,0xa1,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 33, v3 op_sel:[0,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 44, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x3b,0xd2,0xac,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 44, v3 op_sel:[1,1,0]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 11, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x3b,0xd2,0x8b,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 11, v3 op_sel:[0,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 22, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x3b,0xd2,0x96,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 22, v3 op_sel:[1,0,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 33, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x3b,0xd2,0xa1,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 33, v3 op_sel:[0,1,1]
+
+// NOT-GFX950: :[[@LINE+2]]:{{[0-9]+}}: error:
+// GFX950: v_cvt_scalef32_f32_fp8 v1, 44, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x3b,0xd2,0xac,0x06,0x02,0x00]
+v_cvt_scalef32_f32_fp8 v1, 44, v3 op_sel:[1,1,1]
diff --git a/llvm/test/MC/Disassembler/AMDGPU/gfx950_dasm_vop3.txt b/llvm/test/MC/Disassembler/AMDGPU/gfx950_dasm_vop3.txt
index b9a86cbc18247c..063fc70e04b5c6 100644
--- a/llvm/test/MC/Disassembler/AMDGPU/gfx950_dasm_vop3.txt
+++ b/llvm/test/MC/Disassembler/AMDGPU/gfx950_dasm_vop3.txt
@@ -35,3 +35,147 @@
 
 # GFX950: v_bitop3_b16 v5, v1, v2, s3 bitop3:0xa1   ; encoding: [0x05,0x04,0x33,0xd2,0x01,0x05,0x0e,0x30]
 0x05,0x04,0x33,0xd2,0x01,0x05,0x0e,0x30
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3       ; encoding: [0x01,0x00,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x00,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x08,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x10,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x18,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x40,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x48,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x50,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, v2, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x4a,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x58,0x4a,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s1, v3       ; encoding: [0x01,0x00,0x4a,0xd2,0x01,0x06,0x02,0x00]
+0x01,0x00,0x4a,0xd2,0x01,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x4a,0xd2,0x02,0x06,0x02,0x00]
+0x01,0x08,0x4a,0xd2,0x02,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s3, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x4a,0xd2,0x03,0x06,0x02,0x00]
+0x01,0x10,0x4a,0xd2,0x03,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s4, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x4a,0xd2,0x04,0x06,0x02,0x00]
+0x01,0x18,0x4a,0xd2,0x04,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s1, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x4a,0xd2,0x01,0x06,0x02,0x00]
+0x01,0x40,0x4a,0xd2,0x01,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x4a,0xd2,0x02,0x06,0x02,0x00]
+0x01,0x48,0x4a,0xd2,0x02,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s3, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0x03,0x06,0x02,0x00]
+0x01,0x50,0x4a,0xd2,0x03,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, s4, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x4a,0xd2,0x04,0x06,0x02,0x00]
+0x01,0x58,0x4a,0xd2,0x04,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 11, v3       ; encoding: [0x01,0x00,0x4a,0xd2,0x8b,0x06,0x02,0x00]
+0x01,0x00,0x4a,0xd2,0x8b,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 22, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x4a,0xd2,0x96,0x06,0x02,0x00]
+0x01,0x08,0x4a,0xd2,0x96,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 33, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x4a,0xd2,0xa1,0x06,0x02,0x00]
+0x01,0x10,0x4a,0xd2,0xa1,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 44, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x4a,0xd2,0xac,0x06,0x02,0x00]
+0x01,0x18,0x4a,0xd2,0xac,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 11, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0x8b,0x06,0x02,0x00]
+0x01,0x50,0x4a,0xd2,0x8b,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 22, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x4a,0xd2,0x96,0x06,0x02,0x00]
+0x01,0x48,0x4a,0xd2,0x96,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 33, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x4a,0xd2,0xa1,0x06,0x02,0x00]
+0x01,0x50,0x4a,0xd2,0xa1,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f16_fp8 v1, 44, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x4a,0xd2,0xac,0x06,0x02,0x00]
+0x01,0x58,0x4a,0xd2,0xac,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3       ; encoding: [0x01,0x00,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x00,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x08,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x10,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x18,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x40,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x48,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x50,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, v2, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x3b,0xd2,0x02,0x07,0x02,0x00]
+0x01,0x58,0x3b,0xd2,0x02,0x07,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s1, v3       ; encoding: [0x01,0x00,0x3b,0xd2,0x01,0x06,0x02,0x00]
+0x01,0x00,0x3b,0xd2,0x01,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s2, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x3b,0xd2,0x02,0x06,0x02,0x00]
+0x01,0x08,0x3b,0xd2,0x02,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s3, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x3b,0xd2,0x03,0x06,0x02,0x00]
+0x01,0x10,0x3b,0xd2,0x03,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s4, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x3b,0xd2,0x04,0x06,0x02,0x00]
+0x01,0x18,0x3b,0xd2,0x04,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s1, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x3b,0xd2,0x01,0x06,0x02,0x00]
+0x01,0x40,0x3b,0xd2,0x01,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s2, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x3b,0xd2,0x02,0x06,0x02,0x00]
+0x01,0x48,0x3b,0xd2,0x02,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s3, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x3b,0xd2,0x03,0x06,0x02,0x00]
+0x01,0x50,0x3b,0xd2,0x03,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, s4, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x3b,0xd2,0x04,0x06,0x02,0x00]
+0x01,0x58,0x3b,0xd2,0x04,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 11, v3       ; encoding: [0x01,0x00,0x3b,0xd2,0x8b,0x06,0x02,0x00]
+0x01,0x00,0x3b,0xd2,0x8b,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 22, v3 op_sel:[1,0,0] ; encoding: [0x01,0x08,0x3b,0xd2,0x96,0x06,0x02,0x00]
+0x01,0x08,0x3b,0xd2,0x96,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 33, v3 op_sel:[0,1,0] ; encoding: [0x01,0x10,0x3b,0xd2,0xa1,0x06,0x02,0x00]
+0x01,0x10,0x3b,0xd2,0xa1,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 44, v3 op_sel:[1,1,0] ; encoding: [0x01,0x18,0x3b,0xd2,0xac,0x06,0x02,0x00]
+0x01,0x18,0x3b,0xd2,0xac,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 11, v3 op_sel:[0,0,1] ; encoding: [0x01,0x40,0x3b,0xd2,0x8b,0x06,0x02,0x00]
+0x01,0x40,0x3b,0xd2,0x8b,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 22, v3 op_sel:[1,0,1] ; encoding: [0x01,0x48,0x3b,0xd2,0x96,0x06,0x02,0x00]
+0x01,0x48,0x3b,0xd2,0x96,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 33, v3 op_sel:[0,1,1] ; encoding: [0x01,0x50,0x3b,0xd2,0xa1,0x06,0x02,0x00]
+0x01,0x50,0x3b,0xd2,0xa1,0x06,0x02,0x00
+
+# GFX950: v_cvt_scalef32_f32_fp8 v1, 44, v3 op_sel:[1,1,1] ; encoding: [0x01,0x58,0x3b,0xd2,0xac,0x06,0x02,0x00]
+0x01,0x58,0x3b,0xd2,0xac,0x06,0x02,0x00



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