moremath

Documentation

Index

• Constants
• func WasmCompatCeilF32(f float32) float32
• func WasmCompatCeilF64(f float64) float64
• func WasmCompatFloorF32(f float32) float32
• func WasmCompatFloorF64(f float64) float64
• func WasmCompatMax32(x, y float32) float32
• func WasmCompatMax64(x, y float64) float64
• func WasmCompatMin32(x, y float32) float32
• func WasmCompatMin64(x, y float64) float64
• func WasmCompatNearestF32(f float32) float32
• func WasmCompatNearestF64(f float64) float64
• func WasmCompatTruncF32(f float32) float32
• func WasmCompatTruncF64(f float64) float64

Constants

const (
	// F32CanonicalNaNBits is the 32-bit float where payload's MSB equals 1 and others are all zero.
	F32CanonicalNaNBits = uint32(0x7fc0_0000)
	// F32CanonicalNaNBitsMask can be used to judge the value `v` is canonical nan as "v&F32CanonicalNaNBitsMask == F32CanonicalNaNBits"
	F32CanonicalNaNBitsMask = uint32(0x7fff_ffff)
	// F64CanonicalNaNBits is the 64-bit float where payload's MSB equals 1 and others are all zero.
	F64CanonicalNaNBits = uint64(0x7ff8_0000_0000_0000)
	// F64CanonicalNaNBitsMask can be used to judge the value `v` is canonical nan as "v&F64CanonicalNaNBitsMask == F64CanonicalNaNBits"
	F64CanonicalNaNBitsMask = uint64(0x7fff_ffff_ffff_ffff)
	// F32ArithmeticNaNPayloadMSB is used to extract the most significant bit of payload of 32-bit arithmetic NaN values
	F32ArithmeticNaNPayloadMSB = uint32(0x0040_0000)
	// F32ExponentMask is used to extract the exponent of 32-bit floating point.
	F32ExponentMask = uint32(0x7f80_0000)
	// F32ArithmeticNaNBits is an example 32-bit arithmetic NaN.
	F32ArithmeticNaNBits = F32CanonicalNaNBits | 0b1 // Set first bit to make this different from the canonical NaN.
	// F64ArithmeticNaNPayloadMSB is used to extract the most significant bit of payload of 64-bit arithmetic NaN values
	F64ArithmeticNaNPayloadMSB = uint64(0x0008_0000_0000_0000)
	// F64ExponentMask is used to extract the exponent of 64-bit floating point.
	F64ExponentMask = uint64(0x7ff0_0000_0000_0000)
	// F64ArithmeticNaNBits is an example 64-bit arithmetic NaN.
	F64ArithmeticNaNBits = F64CanonicalNaNBits | 0b1 // Set first bit to make this different from the canonical NaN.
)

https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/syntax/values.html#floating-point

Functions

func WasmCompatCeilF32

func WasmCompatCeilF32(f float32) float32

WasmCompatCeilF32 is the same as math.Ceil on 32-bit except that the returned NaN value follows the Wasm specification on NaN propagation. https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/numerics.html#nan-propagation

func WasmCompatCeilF64

func WasmCompatCeilF64(f float64) float64

WasmCompatCeilF64 is the same as math.Ceil on 64-bit except that the returned NaN value follows the Wasm specification on NaN propagation. https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/numerics.html#nan-propagation

func WasmCompatFloorF32

func WasmCompatFloorF32(f float32) float32

WasmCompatFloorF32 is the same as math.Floor on 32-bit except that the returned NaN value follows the Wasm specification on NaN propagation. https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/numerics.html#nan-propagation

func WasmCompatFloorF64

func WasmCompatFloorF64(f float64) float64

WasmCompatFloorF64 is the same as math.Floor on 64-bit except that the returned NaN value follows the Wasm specification on NaN propagation. https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/numerics.html#nan-propagation

func WasmCompatMax32

func WasmCompatMax32(x, y float32) float32

WasmCompatMax32 is the Wasm spec compatible variant of math.Max for 32-bit floating points.

func WasmCompatMax64

func WasmCompatMax64(x, y float64) float64

WasmCompatMax64 is the Wasm spec compatible variant of math.Max for 64-bit floating points.

func WasmCompatMin32

func WasmCompatMin32(x, y float32) float32

WasmCompatMin32 is the Wasm spec compatible variant of math.Min for 32-bit floating points.

func WasmCompatMin64

func WasmCompatMin64(x, y float64) float64

WasmCompatMin64 is the Wasm spec compatible variant of math.Min for 64-bit floating points.

func WasmCompatNearestF32

func WasmCompatNearestF32(f float32) float32

WasmCompatNearestF32 is the Wasm spec compatible variant of math.Round, used for Nearest instruction. For example, this converts 1.9 to 2.0, and this has the semantics of LLVM's rint intrinsic.

Ex. math.Round(-4.5) results in -5 while this results in -4.

See https://llvm.org/docs/LangRef.html#llvm-rint-intrinsic.

func WasmCompatNearestF64

func WasmCompatNearestF64(f float64) float64

WasmCompatNearestF64 is the Wasm spec compatible variant of math.Round, used for Nearest instruction. For example, this converts 1.9 to 2.0, and this has the semantics of LLVM's rint intrinsic.

Ex. math.Round(-4.5) results in -5 while this results in -4.

See https://llvm.org/docs/LangRef.html#llvm-rint-intrinsic.

func WasmCompatTruncF32

func WasmCompatTruncF32(f float32) float32

WasmCompatTruncF32 is the same as math.Trunc on 32-bit except that the returned NaN value follows the Wasm specification on NaN propagation. https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/numerics.html#nan-propagation

func WasmCompatTruncF64

func WasmCompatTruncF64(f float64) float64

WasmCompatTruncF64 is the same as math.Trunc on 64-bit except that the returned NaN value follows the Wasm specification on NaN propagation. https://www.w3.org/TR/2022/WD-wasm-core-2-20220419/exec/numerics.html#nan-propagation