Accelerate System.Half arithmetic and conversions with FP16 - #130512

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tannergooding wants to merge 38 commits into

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tannergooding:tannergooding-accelerate-half-fp16

Commits on Jul 10, 2026

Add internal TYP_HALF JIT type for FP16 acceleration

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ec68eb0
Add AVX10v1 FP16 scalar hwintrinsic table entries and TYP_HALF ins slot

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09529f8
Wire up FP16 scalar instruction flags, EVEX map asserts, and perfscore

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0e31957
Wire up FP16 scalar codegen, lowering, and LSRA for AVX10v1

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36b6796
Accelerate System.Half arithmetic via AVX10v1 using the F16C premise

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0a10f92
Add TYP_HALF ins slot to the ARM64 SVE hwintrinsic table

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8fffc3d
Handle AVX10v1 FP16 scalar intrinsics in HWIntrinsic costing and embedded rounding

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2c03606
Fix doubled-v display name for the FP16 scalar fmadd instructions

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d2caf2f
Fix swapped Ceiling/Floor rounding mode for Half RoundScaleScalar

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1a4337c
Don't accelerate Half.Min/Max with raw vminsh/vmaxsh

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914b9b2
Don't redundantly check AVX10v2 alongside AVX10v1 in emitxarch asserts

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cb53880
Rebind Half to ushort internally instead of adding TYP_HALF

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bd28667
Fix register width display for AVX10v1 Half convert intrinsics

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aa11831
Add internal Arm64 Fp16 instruction set for Half acceleration

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6ed0cf7
Detect Arm64 FEAT_FP16 and expose the internal Fp16 ISA to the JIT

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9336392
Add Arm64 emitter support for scalar half-precision floating-point

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739d2f3
Add Arm64 internal Fp16 hardware intrinsic table entries

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90b53ce
Add Arm64 importer support for accelerating System.Half

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55fcb5a
Add Arm64 codegen for Fp16 compare and conversion intrinsics

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838b8d4
Accelerate Arm64 Half<->float/double conversions at the FP baseline

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75d41fd
Merge remote-tracking branch 'dotnet/main' into tannergooding-accelerate-half-fp16
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6f36102
Wire up Half constant getters and fix the class handle used for generic dispatch

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9da051c
Use the standard TODO- prefix for the Half rounding follow-up comments

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a4a1fdd

Commits on Jul 11, 2026

Fix Arm64 FP16 scalar frecpe/frsqrte encoding and add Half reciprocal-estimate tests

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6dd01c1
Use unordered Half compares and fix packed FP16 FMA disasm mnemonics

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7e3c4f9
Potential fix for pull request finding

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900e2e0

Commits on Jul 13, 2026

Merge remote-tracking branch 'dotnet/main' into tannergooding-accelerate-half-fp16
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428116a

Commits on Jul 15, 2026

Commits on Jul 21, 2026

Merge remote-tracking branch 'dotnet/main' into tannergooding-accelerate-half-fp16
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074a5a1

Commits on Jul 25, 2026

Merge branch 'main' into tannergooding-accelerate-half-fp16
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f578dcf
Use the float compare path for Half on Arm64 as well

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9016acc
Detect Arm64 FEAT_FP16 on Windows via IsProcessorFeaturePresent

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2d41404

Commits on Jul 30, 2026

Merge remote-tracking branch 'dotnet/main' into tannergooding-accelerate-half-fp16
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48825a4
Bump NEXT_AVAILABLE_R2R_BIT and add FMSUB/FNMSUB emitter tests

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ec2f279
Mark the FP16 FMA instructions as IsDstDstSrcAVXInstruction

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f614605

Commits on Jul 31, 2026

Merge remote-tracking branch 'dotnet/main' into tannergooding-accelerate-half-fp16
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bc2a60a

Commits on Aug 4, 2026

Merge remote-tracking branch 'dotnet/main' into tannergooding-accelerate-half-fp16
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42267e0