TEXP

1// PTO-INSTRUCTION: {"assembly":["TEXP <bundle operands>"],"block":["BSTART.SFU TEXP, DataType","B.DATR PadValue (optional)","B.DIM LB0=ValidCol","B.DIM LB1=ValidRow (optional)","B.DIM LB2=Col (optional)","B.IOT SrcTile, mask=PE_MASK, <last>, ->DstTile<TSize>","BSTOP"],"catalog_indices":[16],"catalog_records":[{"arguments":[{"constant":"TileUnary_EXP"},{"operand":"destination0"},{"operand":"source0"}],"command_mnemonic":"BSTART.TEPL","contract_status":"reviewed-complete","datr_contract":{"allowed_nonzero_fields":["PadValueOrByteId"],"pad_union":"pad-value"},"disposition":"accepted-direct-operation","effect_contract":"ExecuteTileUnary","family":"TEPL","fault_contract":"ExecuteTileInstruction","function":18,"legality_handler":"TileOperandsLegal_ExecuteTileUnary","mode":0,"name":"TEXP","operands":[{"field":"destination0","role":"new Local floating destination"},{"field":"source0","role":"persistent Local floating source"}],"restart_contract":"CompleteBundleAtWithAcceptedApplicabilityRules","selector":"0x012","semantic_handler":"ExecuteTileUnary","state_effects":["operand:destination0:new-local-floating-destination","operand:source0:persistent-local-floating-source","runtime:CurrentBundlePadValue:numeric-padding","runtime:NumericStatusFlags:profile-status"]}],"classification":["elementwise-tile-tile","transcendental"],"contract":{"block_composition":["BSTART.SFU TEXP, DataType","B.DATR PadValue (optional)","B.DIM LB0=ValidCol","B.DIM LB1=ValidRow (optional)","B.DIM LB2=Col (optional)","B.IOT SrcTile, mask=PE_MASK, <last>, ->DstTile<TSize>","BSTOP"],"canonical_assembly":["TEXP <bundle operands>"],"defaults":["LB0 is required and supplies nonzero ValidCol. Omitted LB1 selects ValidRow=1. Omitted LB2 selects Col=ValidCol; every explicitly present dimension must be nonzero.","Omitted B.DATR selects PadValue=Null. Explicit PadValue 00, 01, 10, and 11 select Zero, Max, Min, and Null.","The selected numeric profile supplies the operation-fixed approximation, rounding, exceptional result, and exact NV/DZ/OF/UF/NX status vector."],"encoding_class":"selector-encoded-block-operation","examples":["BSTART.SFU TEXP, DataType; B.DATR PadValue (optional); B.DIM LB0=ValidCol; B.DIM LB1=ValidRow (optional); B.DIM LB2=Col (optional); B.IOT SrcTile, mask=PE_MASK, <last>, ->DstTile<TSize>; BSTOP"],"exceptions":["Malformed Local bindings, B.IOR or B.IOS presence, missing or zero dimensions, unsupported DataType, undefined or invalid source encoding, descriptor mismatch, invalid capacity, or allocation failure raises the applicable Tile fault before effects.","exp(positive or negative zero) is positive one; positive infinity remains positive infinity; negative infinity becomes positive zero; signaling NaN records invalid and every NaN produces a quiet-NaN result."],"field_contracts":{"B.DATR.PadValueOrByteId":{"ref":"PTO-FIELD-BLOCK-PADVALUE-OR-BYTEID"}},"field_zero_meanings":{"B.DATR.PadValueOrByteId":"Zero padding when B.DATR is present; omission selects Null."},"legality":["TEXP retains its TEPL raw Mode 0 carrier and executes canonically on the SFU engine.","Exactly one terminating Local B.IOT supplies one persistent source and one newly allocated destination. B.IOR and B.IOS are illegal.","The selected DataType is exactly FP64, FP32, TF32, HF32, FP16, BF16, E4M3, or E5M2.","Source and destination match physical shape, valid shape, row-major layout, and DataType. Every valid source element is defined and has a valid encoding.","PadValueOrByteId is the only applicable B.DATR field; nondefault CMode, Sat, Canonicalize, secondary DataType, RMode, or Layout is illegal.","Source and destination use one PE_MASK. PE_MASK=0000 is a strict no-op before descriptor reads, allocation, faults, numeric status, or payload effects."],"memory_effects":["none"],"operands":[{"field":"destination0","role":"new Local floating destination"},{"field":"source0","role":"persistent Local floating source"}],"ordering":["Complete schema, attribute, dimension, type, descriptor, source-definedness, source-encoding, mask, capacity, and allocation preflight precedes the source snapshot and profile evaluation.","The complete source payload is snapshotted before destination publication, so source/destination aliasing observes the old source value."],"standalone_opcode":false,"state_effects":["For each valid element compute the selected profile's same-type natural exponential.","Accumulate all element status flags, apply selected physical padding, and publish payload, definedness, numeric status, and destination descriptor atomically; rejection leaves architectural state unchanged."]},"depends_on":["PTO-BLOCK-MODEL-SCHEMA-PROFILE-ENCODING"],"engine":"SFU","id":"PTO-TILE-TEXP","mnemonic":"TEXP","summary":"Compute the same-type natural exponential of every valid Local Tile element.","surface":"tile"}2// PTO-REVIEW: {"review_method":"formal-definition-read","outcome":"FORMAL-COMPLETE","reviewed_fields":["assembly","encoding","defaults","operation","state","memory","ordering","faults","reserved"]}3// NDF-BEGIN: PTO-TEXP-CONTRACT-0014// ndf: kind=contract level=L1 layer=tile status=accepted5// TEXP MUST retain TEPL Mode 0 Function 18 while executing on SFU. It MUST6// consume one persistent Local floating source and one renamed same-type7// destination, and MUST compute one profile natural exponential per valid8// element. The FP16, FP32, and BF16 DataTypes, dimension defaults, PadValue-only9// attribute schema, complete preflight, source snapshot, special values,10// status accumulation, padding, and atomic publication are mandatory.11// NDF-END: PTO-TEXP-CONTRACT-00112// DOC-BEGIN: decode13readonly func InstructionContractOperation_TEXP() => TileOperation14begin15    return TileOperation_TEXP;16end;17// DOC-END: decode18// DOC-BEGIN: operation19pure func InstructionContractDataTypeLegal_TEXP(20    data_type: TileDataType) => boolean21begin22    return TileUnaryDataTypeSupported(23        TileUnary_EXP,24        data_type);25end;26
27readonly func InstructionContractOperandsLegal_TEXP(28    destination: TileIndex,29    source: TileIndex) => boolean30begin31    return TileOperandsLegal_ExecuteTileUnary(32        TileUnary_EXP,33        destination,34        source);35end;36
37readonly func InstructionContractHandler_TEXP() => TileSemanticHandler38begin39    return TileHandler_ExecuteTileUnary;40end;41
42func InstructionContractExecute_TEXP(43    destination: TileIndex,44    source: TileIndex)45begin46    assert InstructionContractOperandsLegal_TEXP(47        destination,48        source);49    ExecuteTileUnary(50        TileUnary_EXP,51        destination,52        source);53end;54// DOC-END: operation55