Inherent HLSL Functions

View shader every 30 minutes -- (1) Inherent HLSL function [intrinsic functions (DirectX HLSL )]It looks convenient to put it on the blog. This is on msdn, and it is also available in DirectX documentation.
Intrinsic functions (DirectX HLSL)

The following table lists the intrinsic functions available in HLSL. Each function has a brief description, and a link to a reference page that has more detail about the input argument and return type.

Name	Syntax	Description
ABS	ABS (X)	Absolute value (per component ).
ACOs	ACOs (X)	Returns the arccosine of each component of X.
All	All (X)	Test if all components of X are nonzero.
Any	Any (X)	Test if any component of X is nonzero.
Asfloat	Asfloat (X)	Convert the input type to a float.
Asin	Asin (X)	Returns the arcsine of each component of X.
Asint	Asint (X)	Convert the input type to an integer.
Asuint	Asuint (X)	Convert the input type to an unsigned integer.
Atan	Atan (X)	Returns the arctangent of X.
Atan2	Atan2 (Y, X)	Returns the arctangent of two values (x, y ).
Ceil	Ceil (X)	Returns the smallest integer which is greater than or equal to X.
Clamp	Clamp (x, Min, max)	Clamps X to the range [min, Max].
Clip	Clip (X)	Discards the current pixel, if any component of X is less than zero.
Cos	Cos (X)	Returns the cosine of X.
Cosh	Cosh (X)	Returns the hyperbolic cosine of X.
Cross	Cross (x, y)	Returns the cross product of two 3D vectors.
D3dcolortoubyte4	D3dcolortoubyte4 (X)	Swizzles and scales components of the 4D vector X to compensate for the lack of ubyte4 support in some hardware.
DDX	DDX (X)	Returns the partial derivative of X with respect to the screen-space X-coordinate.
Ddy	Ddy (X)	Returns the partial derivative of X with respect to the screen-Space Y-coordinate.
Degrees	Degrees (X)	Converts X from radians to degrees.
Determinant	Determinant (m)	Returns the determinant of the square matrix m.
Distance	Distance (x, y)	Returns the distance between two points.
Dot	DOT (x, y)	Returns the dot product of two vectors.
Exp	Exp (X)	Returns the base-e exponent.
Exp2	Exp2 (X)	Base 2 exponent (per component ).
Faceforward	Faceforward (n, I, NG)	Returns-N * sign (• (I, NG )).
Floor	Floor (X)	Returns the greatest integer which is less than or equal to X.
Fmod	Fmod (x, y)	Returns the floating point remainder of x/y.
Frac	Frac (X)	Returns the fractional part of X.
Frexp	Frexp (x, exp)	Returns the mantissa and exponent of X.
Fwidth	Fwidth (X)	Returns ABS (DDX (x) + ABS (ddy (x ))
Getrendertargetsamplecount	Getrendertargetsamplecount ()	Returns the number of render-target samples.
Getrendertargetsampleposition	Getrendertargetsampleposition (X)	Returns a sample position (x, y) for a given sample index.
Isfinite	Isfinite (X)	Returns true if X is finite, false otherwise.
Isinf	Isinf (X)	Returns true if X is + inf or-INF, false otherwise.
Isnan	Isnan (X)	Returns true if X is Nan or qnan, false otherwise.
Ldexp	Ldexp (x, exp)	Returns x * 2exp
Length	Length (V)	Returns the length of the vector v.
Lerp	Lerp (X, Y, S)	Returns x + S (Y-x ).
Bytes	Round (n • L, n • H, m)	Returns a lighting vector (ambient, diffuse, specular, 1)
Log	Log (X)	Returns the base-e logarithm of X.
Log10	Log10 (X)	Returns the base-10 logarithm of X.
Log2	Log2 (X)	Returns the base-2 logarithm of X.
Max	Max (x, y)	Selects the greater of X and Y.
Min	Min (x, y)	Selects the lesser of X and Y.
MODF	MODF (x, out IP)	Splits the value x into fractional and integer parts.
Mul	Mul (x, y)	Performs matrix multiplication using X and Y.
Noise	Noise (X)	Generates a random value using the Perlin-noise algorithm.
Normalize	Normalize (X)	Returns a normalized vector.
POW	Pow (x, y)	Returns XY.
Radians	Radians (X)	Converts X from degrees to radians.
Reflect	Reflect (I, n)	Returns a reflection vector.
Refract	Refract (I, n, R)	Returns the refraction vector.
Round	Round (X)	Rounds X to the nearest integer
Rsqrt	Rsqrt (X)	Returns 1/SQRT (X)
Saturate	Saturate (X)	Clamps X to the range [0, 1]
Sign	Sign (X)	Computes the sign of X.
Sin	Sin (X)	Returns the sine of X
Sincos	Sincos (x, out S, out C)	Returns the sine and cosine of X.
Sinh	Sinh (X)	Returns the hyperbolic sine of X
Smoothstep	Smoothstep (Min, Max, X)	Returns a smooth Hermite interpolation between 0 and 1.
SQRT	SQRT (X)	Square Root (per component)
Step	STEP (A, X)	Returns (x> = )? 1: 0
Tan	Tan (X)	Returns the tangent of X
Tanh	Tanh (X)	Returns the hyperbolic tangent of X
Tex1d	Tex1d (S, T)	1D texture lookup.
Tex1dbias	Tex1dbias (S, T)	1D texture lookup with bias.
Tex1dgrad	Tex1dgrad (S, T, DDX, ddy)	1D texture lookup with a gradient.
Tex1dlevels	Tex1dlevels (S, T)	1D texture lookup with OpenGL.
Tex1dproj	Tex1dproj (S, T)	1D texture lookup with projective divide.
Tex2d	Tex2d (S, T)	2D Texture lookup.
Tex2dbias	Tex2dbias (S, T)	2D Texture lookup with bias.
Tex2dgrad	Tex2dgrad (S, T, DDX, ddy)	2D Texture lookup with a gradient.
Tex2dlevels	Tex2dlevels (S, T)	2D Texture lookup with dashboard.
Tex2dproj	Tex2dproj (S, T)	2D Texture lookup with projective divide.
Tex3d	Tex3d (S, T)	3D texture lookup.
Tex3dbias	Tex3dbias (S, T)	3D texture lookup with bias.
Tex3dgrad	Tex3dgrad (S, T, DDX, ddy)	3D texture lookup with a gradient.
Tex3dlevels	Tex3dlevels (S, T)	3D texture lookup with dashboard.
Tex3dproj	Tex3dproj (S, T)	3D texture lookup with projective divide.
Texcube	Texcube (S, T)	Cube Texture lookup.
Texcubebias	Texcubebias (S, T)	Cube Texture lookup with bias.
Texcubegrad	Texcubegrad (S, T, DDX, ddy)	Cube Texture lookup with a gradient.
Texcubelod	Tex3dlevels (S, T)	Cube Texture lookup with OpenGL.
Texcubeproj	Texcubeproj (S, T)	Cube Texture lookup with projective divide.
Transpose	Transpose (m)	Returns the transpose of the matrix m.
Trunc	Trunc (X)	Truncates floating-point value (s) to integer value (s)

Table 3-1 HLSL built-in functions

Function Name usage

ABS calculates the absolute value of the input value.

ACOs returns the inverse cosine of the input value.

The value of all is not 0.

Any tests any non-zero value in the input value.

Asin returns the arc sine of the input value.

Atan returns the arc tangent of the input value.

Atan2 returns the arc tangent value of Y/X.

Ceil returns the smallest integer greater than or equal to the input value.

Clamp limits the input value to the range of [min, Max.

Clip drops the current pixel if any element in the input vector is less than 0.

Cos returns the cosine of the input value.

Cosh returns the hyperbolic cosine of the input value.

Cross returns the cross product of two 3D vectors.

DDX returns the partial derivative of the X axis of the screen coordinate.

Ddy returns the partial derivative of the Y axis of the screen coordinate.

Degrees to degrees

Determinant returns the value of the input matrix.

Distance returns the distance between two input points.

Dot returns the dot product of two vectors.

Exp returns the base number of E, and the input value is the exponential value.

Exp2 returns an exponential function value that uses 2 as the base and the input value as the index.

Faceforward checks whether a polygon is located on the front.

Floor returns the largest integer less than or equal to X.

Fmod returns the floating point remainder of A/B.

Frac returns the fractional part of the input value.

Frexp returns the ending and exponent of the input value

Fwidth returns ABS (DDX (x) + ABS (ddy (x )).

Isfinite returns true if the input value is finite; otherwise, false.

If the input value of isinf is infinite, true is returned.

Isnan returns true if the input value is Nan or qnan.

Returns x * 2 ^ exp for the inverse operation of ldexp frexp.

Len/lenth returns the length of the input vector.

Lerp performs Interpolation on input values.

Returns the illumination vector (Environment light, diffuse reflection light, mirror highlight, 1 ).

Log returns the base-e logarithm.

Log10 returns the base-10 logarithm.

Log2 returns the base 2 logarithm.

Max returns one of the two input values.

Min returns a smaller value of the two input values.

MODF splits the input values into integers and decimals.

Mul returns the product of the input matrix.

Normalize returns the normalized vector, defined as X/length (X ).

Pow returns the specified power of the input value.

The conversion from radians angle to radians.

Reflect returns the reflected light from the incident light I to the surface normal n.

Refract returns the X-ray V of the incident light I, the surface normal N, and the refractive index ETA.

Round returns an integer closest to the input value.

Rsqrt returns the reciprocal of the square root of the input value.

Saturate limits the input value to [0, 1.

Sign calculates the sign of the input value.

Sin calculates the sine of the input value.

Sincos returns the sine and cosine of the input value.

Sinh returns the hyperbolic sine of X.

Smoothstep returns an interpolation that changes smoothly between input values.

SQRT returns the square root of the input value.

Step return (x> = )? 1: 0.

Tan returns the tangent of the input value.

Fanh returns the hyperbolic tangent of the input value.

Transpose returns the transpose of the input matrix.

Tex1d * 1D texture query.

Tex2d * 2D Texture query.

Tex3d * 3D texture query.

Texcube * Cube Texture query.