Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

feat: add C ndarray implementation for blas/base/srotm #2928

Merged
merged 1 commit into from
Sep 22, 2024
Merged

feat: add C ndarray implementation for blas/base/srotm #2928

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
35 changes: 35 additions & 0 deletions lib/node_modules/@stdlib/blas/base/srotm/README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -223,6 +223,33 @@ The function accepts the following arguments:
void c_srotm( const CBLAS_INT N, float *X, const CBLAS_INT strideX, float *Y, const CBLAS_INT strideY, const float *param );
```

#### c_srotm_ndarray( N, \*X, strideX, offsetX, \*Y, strideY, offsetY, param )

Applies a modified Givens plane rotation using alternative indexing semantics.

```c
float x[] = { 1.0f, 2.0f, 3.0f, 4.0f, 5.0f };
float y[] = { 6.0f, 7.0f, 8.0f, 9.0f, 10.0f };
const float param[5] = { 0.0f, 0.0f, 2.0f, -3.0f, 0.0f };

c_srotm_ndarray( 5, x, 1, 0, y, 1, 0, param );
```

The function accepts the following arguments:

- **N**: `[in] CBLAS_INT` number of indexed elements.
- **X**: `[inout] float*` first input array.
- **strideX**: `[in] CBLAS_INT` index increment for `X`.
- **offsetX**: `[in] CBLAS_INT` starting index for `X`.
- **Y**: `[inout] float*` second input array.
- **strideY**: `[in] CBLAS_INT` index increment for `Y`.
- **offsetY**: `[in] CBLAS_INT` starting index for `Y`.
- **param**: `[in] float` parameters for the modified Givens transformation.

```c
void c_srotm_ndarray( const CBLAS_INT N, float *X, const CBLAS_INT strideX, const CBLAS_INT offsetX, float *Y, const CBLAS_INT strideY, const CBLAS_INT offsetY, const float *param );
```

</section>

<!-- /.usage -->
Expand Down Expand Up @@ -267,6 +294,14 @@ int main( void ) {
for ( int i = 0; i < 5; i++ ) {
printf( "x[ %i ] = %f, y[ %i ] = %f\n", i, x[ i ], i, y[ i ] );
}

// Apply plane rotation:
c_srotm_ndarray( N, x, -strideX, N-1, y, -strideY, N-1, param );

// Print the result:
for ( int i = 0; i < 5; i++ ) {
printf( "x[ %i ] = %f, y[ %i ] = %f\n", i, x[ i ], i, y[ i ] );
}
}
```

Expand Down
46 changes: 44 additions & 2 deletions lib/node_modules/@stdlib/blas/base/srotm/benchmark/c/benchmark.length.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,7 @@ static float rand_float( void ) {
* @param len array length
* @return elapsed time in seconds
*/
static double benchmark( int iterations, int len ) {
static double benchmark1( int iterations, int len ) {
double elapsed;
float x[ len ];
float y[ len ];
Expand Down Expand Up @@ -122,6 +122,41 @@ static double benchmark( int iterations, int len ) {
return elapsed;
}

/**
* Runs a benchmark.
*
* @param iterations number of iterations
* @param len array length
* @return elapsed time in seconds
*/
static double benchmark2( int iterations, int len ) {
double elapsed;
float x[ len ];
float y[ len ];
double t;
int i;

const float param[5] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
for ( i = 0; i < len; i++ ) {
x[ i ] = ( rand_float()*200.0f ) - 100.0f;
y[ i ] = ( rand_float()*200.0f ) - 100.0f;
}

t = tic();
for ( i = 0; i < iterations; i++ ) {
c_srotm_ndarray( len, x, 1, 0, y, 1, 0, param );
if ( y[ 0 ] != y[ 0 ] ) {
printf( "should not return NaN\n" );
break;
}
}
elapsed = tic() - t;
if ( y[ 0 ] != y[ 0 ] ) {
printf( "should not return NaN\n" );
}
return elapsed;
}

/**
* Main execution sequence.
*/
Expand All @@ -144,7 +179,14 @@ int main( void ) {
for ( j = 0; j < REPEATS; j++ ) {
count += 1;
printf( "# c::%s:len=%d\n", NAME, len );
elapsed = benchmark( iter, len );
elapsed = benchmark1( iter, len );
print_results( iter, elapsed );
printf( "ok %d benchmark finished\n", count );
}
for ( j = 0; j < REPEATS; j++ ) {
count += 1;
printf( "# c::%s:ndarray:len=%d\n", NAME, len );
elapsed = benchmark2( iter, len );
print_results( iter, elapsed );
printf( "ok %d benchmark finished\n", count );
}
Expand Down
8 changes: 8 additions & 0 deletions lib/node_modules/@stdlib/blas/base/srotm/examples/c/example.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -41,4 +41,12 @@ int main( void ) {
for ( int i = 0; i < 5; i++ ) {
printf( "x[ %i ] = %f, y[ %i ] = %f\n", i, x[ i ], i, y[ i ] );
}

// Apply plane rotation:
c_srotm_ndarray( N, x, -strideX, N-1, y, -strideY, N-1, param );

// Print the result:
for ( int i = 0; i < 5; i++ ) {
printf( "x[ %i ] = %f, y[ %i ] = %f\n", i, x[ i ], i, y[ i ] );
}
}
5 changes: 5 additions & 0 deletions lib/node_modules/@stdlib/blas/base/srotm/include/stdlib/blas/base/srotm.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,11 @@ extern "C" {
*/
void API_SUFFIX(c_srotm)( const CBLAS_INT N, float *X, const CBLAS_INT strideX, float *Y, const CBLAS_INT strideY, const float *param );

/**
* Applies a modified Givens plane rotation using alternative indexing semantics.
*/
void API_SUFFIX(c_srotm_ndarray)( const CBLAS_INT N, float *X, const CBLAS_INT strideX, const CBLAS_INT offsetX, float *Y, const CBLAS_INT strideY, const CBLAS_INT offsetY, const float *param );

#ifdef __cplusplus
}
#endif
Expand Down
4 changes: 2 additions & 2 deletions lib/node_modules/@stdlib/blas/base/srotm/lib/ndarray.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -31,10 +31,10 @@ var f32 = require( '@stdlib/number/float64/base/to-float32' );
* @param {PositiveInteger} N - number of indexed elements
* @param {Float32Array} x - first input array
* @param {integer} strideX - `x` stride length
* @param {NonNegativeInteger} offsetX - starting `x` index
* @param {NonNegativeInteger} offsetX - starting index for `x`
* @param {Float32Array} y - second input array
* @param {integer} strideY - `y` stride length
* @param {NonNegativeInteger} offsetY - starting `y` index
* @param {NonNegativeInteger} offsetY - starting index for `y`
* @param {Float32Array} param - parameters for the modified Givens transformation
* @returns {Float32Array} `y`
*
Expand Down
19 changes: 4 additions & 15 deletions lib/node_modules/@stdlib/blas/base/srotm/lib/ndarray.native.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -20,9 +20,7 @@

// MODULES //

var minViewBufferIndex = require( '@stdlib/strided/base/min-view-buffer-index' );
var offsetView = require( '@stdlib/strided/base/offset-view' );
var addon = require( './srotm.native.js' );
var addon = require( './../src/addon.node' );


// MAIN //
Expand All @@ -33,10 +31,10 @@ var addon = require( './srotm.native.js' );
* @param {PositiveInteger} N - number of indexed elements
* @param {Float32Array} x - first input array
* @param {integer} strideX - `x` stride length
* @param {NonNegativeInteger} offsetX - starting `x` index
* @param {NonNegativeInteger} offsetX - starting index for `x`
* @param {Float32Array} y - second input array
* @param {integer} strideY - `y` stride length
* @param {NonNegativeInteger} offsetY - starting `y` index
* @param {NonNegativeInteger} offsetY - starting index for `y`
* @param {Float32Array} param - parameters for the modified Givens transformation
* @returns {Float32Array} `y`
*
Expand All @@ -52,16 +50,7 @@ var addon = require( './srotm.native.js' );
* // y => <Float32Array>[ ~1.7, ~-0.9, ~0.5, ~0.7, ~-1.6, ~0.2, ~2.4 ]
*/
function srotm( N, x, strideX, offsetX, y, strideY, offsetY, param ) {
var viewX;
var viewY;

offsetX = minViewBufferIndex( N, strideX, offsetX );
offsetY = minViewBufferIndex( N, strideY, offsetY );

viewX = offsetView( x, offsetX );
viewY = offsetView( y, offsetY );

addon( N, viewX, strideX, viewY, strideY, param );
addon.ndarray( N, x, strideX, offsetX, y, strideY, offsetY, param );
return y;
}

Expand Down
12 changes: 2 additions & 10 deletions lib/node_modules/@stdlib/blas/base/srotm/lib/srotm.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,16 +49,8 @@ var ndarray = require( './ndarray.js' );
* // y => <Float32Array>[ ~1.7, ~-0.9, ~0.5, ~0.7, ~-1.6, ~0.2, ~2.4 ]
*/
function srotm( N, x, strideX, y, strideY, param ) {
var sflag;
var ix;
var iy;

sflag = param[ 0 ];
if ( N <= 0 || sflag === -2.0 ) {
return y;
}
ix = stride2offset( N, strideX );
iy = stride2offset( N, strideY );
var ix = stride2offset( N, strideX );
var iy = stride2offset( N, strideY );
return ndarray( N, x, strideX, ix, y, strideY, iy, param );
}

Expand Down
Loading
Loading