swapbytes — Reverse the byte order of numeric values.
swapbytes(X) reverses the byte order of each numeric element while preserving the input numeric class.
Syntax
Y = swapbytes(X)Inputs
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
X | NumericArray | Yes | — | Numeric scalar or array whose element byte order is reversed. |
Returns
| Name | Type | Description |
|---|---|---|
C | NumericArray | Bitwise numeric result. |
Errors
| Identifier | When | Message |
|---|---|---|
RunMat:bitwise:InvalidInput | Inputs are not finite integer-valued numeric, logical, or gatherable gpuArray values. | bitwise operation: invalid input |
RunMat:bitwise:SizeMismatch | Input shapes are not compatible for implicit expansion. | bitwise operation: array sizes are not compatible |
RunMat:idivide:DivideByZero | The divisor contains zero. | idivide: division by zero |
RunMat:idivide:Overflow | A rounded quotient cannot be represented in the dividend integer class. | idivide: quotient overflows output class |
How swapbytes works
- Supports scalar integer values and scalar doubles.
- Supports dense
double,single,uint8,uint16, anduint32tensors. uint8values are unchanged because they contain one byte.- Floating-point values are reinterpreted by their IEEE bytes, byte-swapped, and returned in the same class.
- Logical, complex, string, cell, struct, and object inputs raise errors.
Examples
Swap an unsigned integer scalar
y = swapbytes(uint16(hex2dec('1234')))Expected output:
y = uint16
13330Swap every element of an unsigned integer array
y = swapbytes(uint16([hex2dec('1234') hex2dec('00ff')]))Expected output:
y = uint16([hex2dec('3412') hex2dec('ff00')])Using swapbytes with coding agents
Open a RunMat example with live inputs, then ask the agent to explain how swapbytes changes the result.
Run a small swapbytes example, explain the result, then change one input and compare the output.
Related Math functions
Elementwise
abs · angle · bsxfun · complex · conj · double · erf · erfcinv · exp · expm1 · factorial · flintmax · gamma · gammaln · heaviside · hypot · idivide · imag · intmax · intmin · ldivide · log · log10 · log1p · log2 · minus · nextpow2 · plus · pow2 · power · rdivide · real · realmax · realmin · realsqrt · rescale · sign · single · sqrt · times · uint32
Trigonometry
acos · acosh · asin · asinh · atan · atan2 · atanh · cos · cosd · cosh · cospi · deg2rad · pol2cart · rad2deg · sin · sind · sinh · sinpi · tan · tand · tanh
Reduction
all · any · bounds · cummax · cummin · cumprod · cumsum · cumtrapz · diff · gradient · max · maxk · mean · median · min · mink · movmax · movmean · movmedian · movmin · movprod · movstd · movsum · movvar · nnz · prod · rms · std · sum · trapz · var
Structure
bandwidth · isdiag · ishermitian · issymmetric · istril · istriu · symrcm
Signal
blackman · butter · buttord · cheb2ord · conv · conv2 · deconv · downsample · envelope · filter · filtfilt · fir1 · freqz · gauspuls · hamming · hann · hilbert · periodogram · pulstran · pwelch · rectpuls · resample · sawtooth · sinc · spectrogram · square · tripuls · unwrap · upsample · zplane
Optim
coneprog · fminbnd · fminunc · fsolve · fzero · integral · linprog · lsqcurvefit · lsqnonlin · optimset · quad · secondordercone
Ops
cross · ctranspose · dot · mldivide · mpower · mrdivide · mtimes · pagemtimes · pagetranspose · trace · transpose
Open-source implementation
Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how swapbytes is executed, line by line, in Rust.
- View the source for swapbytes in Rust on GitHub
- Learn how the RunMat runtime works
- Found a bug? Open an issue with a minimal reproduction.
About RunMat
RunMat is an open-source runtime that executes MATLAB-syntax code blazing on any GPU. It is licensed under the Apache 2.0 license.
- RunMat automatically optimizes your math for GPU execution on Apple, Nvidia, and AMD hardware. No code changes needed. Simulations that took hours now take minutes.
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