diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/README.md b/lib/node_modules/@stdlib/number/float16/base/signbit/README.md
new file mode 100644
index 000000000000..2155085fe459
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/README.md
@@ -0,0 +1,191 @@
+
+
+# signbit
+
+> Return a boolean indicating if the sign bit for a [half-precision floating-point number][ieee754] is on (true) or off (false).
+
+
+
+## Usage
+
+```javascript
+var signbit = require( '@stdlib/number/float16/base/signbit' );
+```
+
+#### signbit( x )
+
+Returns a boolean indicating if the sign bit for a [half-precision floating-point number][ieee754] is on (`true`) or off (`false`).
+
+```javascript
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+
+var bool = signbit( toFloat16( 4.0 ) );
+// returns false
+
+bool = signbit( toFloat16( -5.960464477539063e-8 ) );
+// returns true
+
+bool = signbit( 0.0 );
+// returns false
+
+bool = signbit( -0.0 );
+// returns true
+```
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var map = require( '@stdlib/array/base/map' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var signbit = require( '@stdlib/number/float16/base/signbit' );
+
+// Create an array of random half-precision floating-point numbers:
+var x = map( uniform( 100, -50.0, 50.0 ), toFloat16 );
+
+// Determine whether the sign bit is on or off for each number:
+logEachMap( 'x: %0.4f => %s', x, signbit );
+```
+
+
+
+
+
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
+
+
+
+
+
+
+
+### Usage
+
+```c
+#include "stdlib/number/float16/base/signbit.h"
+```
+
+#### stdlib_base_float16_signbit( x )
+
+Returns an integer indicating whether the sign bit for a half-precision floating-point number is on (`1`) or off (`0`).
+
+```c
+#include "stdlib/number/float16/ctor.h"
+#include
+
+stdlib_float16_t x = stdlib_float16_from_bits( 51648 ); // => -11.5
+int8_t out = stdlib_base_float16_signbit( x );
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] stdlib_float16_t` input value.
+
+```c
+int8_t stdlib_base_float16_signbit( const stdlib_float16_t x );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Examples
+
+```c
+#include "stdlib/number/float16/base/signbit.h"
+#include "stdlib/number/float16/ctor.h"
+#include "stdlib/number/float32/base/to_float16.h"
+#include
+#include
+#include
+
+int main( void ) {
+ const float x[] = { 3.14f, -3.14f, 0.0f, -0.0f, 4.0f, 1.0f, -1.0f, 1.0e38f, -1.0e38f };
+
+ stdlib_float16_t v;
+ int8_t out;
+ int i;
+ for ( i = 0; i < 9; i++ ) {
+ v = stdlib_base_float32_to_float16( x[ i ] );
+ out = stdlib_base_float16_signbit( v );
+ printf( "%f => signbit: %" PRId8 "\n", x[ i ], out );
+ }
+}
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985
+
+
+
+
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/benchmark.js b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/benchmark.js
new file mode 100644
index 000000000000..d8d6cb0f0e3e
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/benchmark.js
@@ -0,0 +1,55 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var map = require( '@stdlib/array/base/map' );
+var naryFunction = require( '@stdlib/utils/nary-function' );
+var pkg = require( './../package.json' ).name;
+var signbit = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var x;
+ var y;
+ var i;
+
+ x = map( uniform( 100, -5.0e4, 5.0e4 ), naryFunction( toFloat16, 1 ) );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = signbit( x[ i%x.length ] );
+ if ( typeof y !== 'boolean' ) {
+ b.fail( 'should return a boolean' );
+ }
+ }
+ b.toc();
+ if ( !isBoolean( y ) ) {
+ b.fail( 'should return a boolean' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/benchmark.native.js
new file mode 100644
index 000000000000..04c0abe1d132
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/benchmark.native.js
@@ -0,0 +1,64 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var map = require( '@stdlib/array/base/map' );
+var naryFunction = require( '@stdlib/utils/nary-function' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var signbit = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( signbit instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+ var x;
+ var y;
+ var i;
+
+ x = map( uniform( 100, -5.0e4, 5.0e4 ), naryFunction( toFloat16, 1 ) );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = signbit( x[ i%x.length ] );
+ if ( typeof y !== 'boolean' ) {
+ b.fail( 'should return a boolean' );
+ }
+ }
+ b.toc();
+ if ( !isBoolean( y ) ) {
+ b.fail( 'should return a boolean' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/c/Makefile b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/c/Makefile
new file mode 100644
index 000000000000..a4bd7b38fd74
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := benchmark.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled benchmarks.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/c/benchmark.c b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/c/benchmark.c
new file mode 100644
index 000000000000..412b0139711f
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/benchmark/c/benchmark.c
@@ -0,0 +1,138 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/number/float16/base/signbit.h"
+#include "stdlib/number/float32/base/to_float16.h"
+#include "stdlib/number/float16/ctor.h"
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define NAME "float16_signbit"
+#define ITERATIONS 1000000
+#define REPEATS 3
+
+/**
+* Prints the TAP version.
+*/
+static void print_version( void ) {
+ printf( "TAP version 13\n" );
+}
+
+/**
+* Prints the TAP summary.
+*
+* @param total total number of tests
+* @param passing total number of passing tests
+*/
+static void print_summary( int total, int passing ) {
+ printf( "#\n" );
+ printf( "1..%d\n", total ); // TAP plan
+ printf( "# total %d\n", total );
+ printf( "# pass %d\n", passing );
+ printf( "#\n" );
+ printf( "# ok\n" );
+}
+
+/**
+* Prints benchmarks results.
+*
+* @param elapsed elapsed time in seconds
+*/
+static void print_results( double elapsed ) {
+ double rate = (double)ITERATIONS / elapsed;
+ printf( " ---\n" );
+ printf( " iterations: %d\n", ITERATIONS );
+ printf( " elapsed: %0.9f\n", elapsed );
+ printf( " rate: %0.9f\n", rate );
+ printf( " ...\n" );
+}
+
+/**
+* Returns a clock time.
+*
+* @return clock time
+*/
+static double tic( void ) {
+ struct timeval now;
+ gettimeofday( &now, NULL );
+ return (double)now.tv_sec + (double)now.tv_usec/1.0e6;
+}
+
+/**
+* Generates a random number on the interval [0,1).
+*
+* @return random number
+*/
+static float rand_float( void ) {
+ int r = rand();
+ return (float)r / ( (float)RAND_MAX + 1.0f );
+}
+
+/**
+* Runs a benchmark.
+*
+* @return elapsed time in seconds
+*/
+static double benchmark( void ) {
+ stdlib_float16_t x[ 100 ];
+ double elapsed;
+ int8_t out;
+ double t;
+ int i;
+
+ for ( i = 0; i < 100; i++ ) {
+ x[ i ] = stdlib_base_float32_to_float16( ( 200.0f * rand_float() ) - 100.0f );
+ }
+
+ t = tic();
+ for ( i = 0; i < ITERATIONS; i++ ) {
+ out = stdlib_base_float16_signbit( x[ i%100 ] );
+ if ( out != 0 && out != 1 ) {
+ printf( "unexpected result\n" );
+ break;
+ }
+ }
+ elapsed = tic() - t;
+ if ( out != 0 && out != 1 ) {
+ printf( "unexpected result\n" );
+ }
+ return elapsed;
+}
+/**
+* Main execution sequence.
+*/
+int main ( void ) {
+ double elapsed;
+ int i;
+
+ // Use the current time to seed the random number generator:
+ srand( time( NULL ) );
+
+ print_version();
+ for ( i = 0; i < REPEATS; i++ ) {
+ printf( "# c::native::%s\n", NAME );
+ elapsed = benchmark();
+ print_results( elapsed );
+ printf( "ok %d benchmark finished\n", i+1 );
+ }
+ print_summary( REPEATS, REPEATS );
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/binding.gyp b/lib/node_modules/@stdlib/number/float16/base/signbit/binding.gyp
new file mode 100644
index 000000000000..68a1ca11d160
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/binding.gyp
@@ -0,0 +1,170 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A `.gyp` file for building a Node.js native add-on.
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # List of files to include in this file:
+ 'includes': [
+ './include.gypi',
+ ],
+
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Target name should match the add-on export name:
+ 'addon_target_name%': 'addon',
+
+ # Set variables based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="win"',
+ {
+ # Define the object file suffix:
+ 'obj': 'obj',
+ },
+ {
+ # Define the object file suffix:
+ 'obj': 'o',
+ }
+ ], # end condition (OS=="win")
+ ], # end conditions
+ }, # end variables
+
+ # Define compile targets:
+ 'targets': [
+
+ # Target to generate an add-on:
+ {
+ # The target name should match the add-on export name:
+ 'target_name': '<(addon_target_name)',
+
+ # Define dependencies:
+ 'dependencies': [],
+
+ # Define directories which contain relevant include headers:
+ 'include_dirs': [
+ # Local include directory:
+ '<@(include_dirs)',
+ ],
+
+ # List of source files:
+ 'sources': [
+ '<@(src_files)',
+ ],
+
+ # Settings which should be applied when a target's object files are used as linker input:
+ 'link_settings': {
+ # Define libraries:
+ 'libraries': [
+ '<@(libraries)',
+ ],
+
+ # Define library directories:
+ 'library_dirs': [
+ '<@(library_dirs)',
+ ],
+ },
+
+ # C/C++ compiler flags:
+ 'cflags': [
+ # Enable commonly used warning options:
+ '-Wall',
+
+ # Aggressive optimization:
+ '-O3',
+ ],
+
+ # C specific compiler flags:
+ 'cflags_c': [
+ # Specify the C standard to which a program is expected to conform:
+ '-std=c99',
+ ],
+
+ # C++ specific compiler flags:
+ 'cflags_cpp': [
+ # Specify the C++ standard to which a program is expected to conform:
+ '-std=c++11',
+ ],
+
+ # Linker flags:
+ 'ldflags': [],
+
+ # Apply conditions based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="mac"',
+ {
+ # Linker flags:
+ 'ldflags': [
+ '-undefined dynamic_lookup',
+ '-Wl,-no-pie',
+ '-Wl,-search_paths_first',
+ ],
+ },
+ ], # end condition (OS=="mac")
+ [
+ 'OS!="win"',
+ {
+ # C/C++ flags:
+ 'cflags': [
+ # Generate platform-independent code:
+ '-fPIC',
+ ],
+ },
+ ], # end condition (OS!="win")
+ ], # end conditions
+ }, # end target <(addon_target_name)
+
+ # Target to copy a generated add-on to a standard location:
+ {
+ 'target_name': 'copy_addon',
+
+ # Declare that the output of this target is not linked:
+ 'type': 'none',
+
+ # Define dependencies:
+ 'dependencies': [
+ # Require that the add-on be generated before building this target:
+ '<(addon_target_name)',
+ ],
+
+ # Define a list of actions:
+ 'actions': [
+ {
+ 'action_name': 'copy_addon',
+ 'message': 'Copying addon...',
+
+ # Explicitly list the inputs in the command-line invocation below:
+ 'inputs': [],
+
+ # Declare the expected outputs:
+ 'outputs': [
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+
+ # Define the command-line invocation:
+ 'action': [
+ 'cp',
+ '<(PRODUCT_DIR)/<(addon_target_name).node',
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+ },
+ ], # end actions
+ }, # end target copy_addon
+ ], # end targets
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/docs/repl.txt b/lib/node_modules/@stdlib/number/float16/base/signbit/docs/repl.txt
new file mode 100644
index 000000000000..586eddac0649
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/docs/repl.txt
@@ -0,0 +1,28 @@
+
+{{alias}}( x )
+ Returns a boolean indicating if the sign bit is on (true) or off (false).
+
+ Parameters
+ ----------
+ x: number
+ Half-precision floating-point number.
+
+ Returns
+ -------
+ bool: boolean
+ Boolean indicating if sign bit is on or off.
+
+ Examples
+ --------
+ > var bool = {{alias}}( {{alias:@stdlib/number/float64/base/to-float16}}( 4.0 ) )
+ false
+ > bool = {{alias}}( {{alias:@stdlib/number/float64/base/to-float16}}( -5.960464477539063e-8 ) )
+ true
+ > bool = {{alias}}( 0.0 )
+ false
+ > bool = {{alias}}( -0.0 )
+ true
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/docs/types/index.d.ts b/lib/node_modules/@stdlib/number/float16/base/signbit/docs/types/index.d.ts
new file mode 100644
index 000000000000..4a94039bbb3b
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/docs/types/index.d.ts
@@ -0,0 +1,52 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Returns a boolean indicating if the sign bit is on (true) or off (false).
+*
+* @param x - half-precision floating-point number
+* @returns boolean indicating if sign bit is on or off
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+*
+* var bool = signbit( toFloat16( 4.0 ) );
+* // returns false
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+*
+* var bool = signbit( toFloat16( -5.960464477539063e-8 ) );
+* // returns true
+*
+* @example
+* var bool = signbit( 0.0 );
+* // returns false
+*
+* @example
+* var bool = signbit( -0.0 );
+* // returns true
+*/
+declare function signbit( x: number ): boolean;
+
+
+// EXPORTS //
+
+export = signbit;
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/docs/types/test.ts b/lib/node_modules/@stdlib/number/float16/base/signbit/docs/types/test.ts
new file mode 100644
index 000000000000..6f17d0dce45b
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/docs/types/test.ts
@@ -0,0 +1,43 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import signbit = require( './index' );
+
+
+// TESTS //
+
+// The function returns a boolean...
+{
+ signbit( 0.0 ); // $ExpectType boolean
+ signbit( -0.0 ); // $ExpectType boolean
+}
+
+// The compiler throws an error if the function is provided a value other than a number...
+{
+ signbit( true ); // $ExpectError
+ signbit( false ); // $ExpectError
+ signbit( 'abc' ); // $ExpectError
+ signbit( [] ); // $ExpectError
+ signbit( {} ); // $ExpectError
+ signbit( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+ signbit(); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/examples/c/Makefile b/lib/node_modules/@stdlib/number/float16/base/signbit/examples/c/Makefile
new file mode 100644
index 000000000000..25ced822f96a
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/examples/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := example.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled examples.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/examples/c/example.c b/lib/node_modules/@stdlib/number/float16/base/signbit/examples/c/example.c
new file mode 100644
index 000000000000..619b09c76f25
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/examples/c/example.c
@@ -0,0 +1,37 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/number/float16/base/signbit.h"
+#include "stdlib/number/float16/ctor.h"
+#include "stdlib/number/float32/base/to_float16.h"
+#include
+#include
+#include
+
+int main( void ) {
+ const float x[] = { 3.14f, -3.14f, 0.0f, -0.0f, 4.0f, 1.0f, -1.0f, 1.0e38f, -1.0e38f };
+
+ stdlib_float16_t v;
+ int8_t out;
+ int i;
+ for ( i = 0; i < 9; i++ ) {
+ v = stdlib_base_float32_to_float16( x[ i ] );
+ out = stdlib_base_float16_signbit( v );
+ printf( "%f => signbit: %" PRId8 "\n", x[ i ], out );
+ }
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/examples/index.js b/lib/node_modules/@stdlib/number/float16/base/signbit/examples/index.js
new file mode 100644
index 000000000000..296a551d7848
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/examples/index.js
@@ -0,0 +1,31 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var map = require( '@stdlib/array/base/map' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var signbit = require( './../lib' );
+
+// Create an array of random half-precision floating-point numbers:
+var x = map( uniform( 100, -50.0, 50.0 ), toFloat16 );
+
+// Determine whether the sign bit is on or off for each number:
+logEachMap( 'x: %0.4f => %s', x, signbit );
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/include.gypi b/lib/node_modules/@stdlib/number/float16/base/signbit/include.gypi
new file mode 100644
index 000000000000..ecfaf82a3279
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/include.gypi
@@ -0,0 +1,53 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A GYP include file for building a Node.js native add-on.
+#
+# Main documentation:
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Source directory:
+ 'src_dir': './src',
+
+ # Include directories:
+ 'include_dirs': [
+ '
+
+/*
+* If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+* Returns an integer indicating whether the sign bit for a half-precision floating-point number is on (`1`) or off (`0`).
+*/
+int8_t stdlib_base_float16_signbit( const stdlib_float16_t x );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // !STDLIB_NUMBER_FLOAT16_BASE_SIGNBIT_H
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/lib/index.js b/lib/node_modules/@stdlib/number/float16/base/signbit/lib/index.js
new file mode 100644
index 000000000000..309444846b35
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/lib/index.js
@@ -0,0 +1,50 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Return a boolean indicating if the sign bit is on (true) or off (false).
+*
+* @module @stdlib/number/float16/base/signbit
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+* var signbit = require( '@stdlib/number/float16/base/signbit' );
+*
+* var bool = signbit( toFloat16( 4.0 ) );
+* // returns false
+*
+* bool = signbit( toFloat16( -5.960464477539063e-8 ) );
+* // returns true
+*
+* bool = signbit( 0.0 );
+* // returns false
+*
+* bool = signbit( -0.0 );
+* // returns true
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/lib/main.js b/lib/node_modules/@stdlib/number/float16/base/signbit/lib/main.js
new file mode 100644
index 000000000000..503e677df1ef
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/lib/main.js
@@ -0,0 +1,65 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var toWord = require( '@stdlib/number/float16/base/to-word' );
+
+
+// MAIN //
+
+/**
+* Returns a boolean indicating if the sign bit is on (true) or off (false).
+*
+* @param {number} x - half-precision floating-point number
+* @returns {boolean} boolean indicating if sign bit is on or off
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+*
+* var bool = signbit( toFloat16( 4.0 ) );
+* // returns false
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+*
+* var bool = signbit( toFloat16( -5.960464477539063e-8 ) );
+* // returns true
+*
+* @example
+* var bool = signbit( 0.0 );
+* // returns false
+*
+* @example
+* var bool = signbit( -0.0 );
+* // returns true
+*/
+function signbit( x ) {
+ // Convert `x` to an unsigned 16-bit integer corresponding to the value's IEEE 754 binary representation:
+ var w = toWord( x );
+
+ // Shift off all bits which are not the sign bit and check if the sign bit is on:
+ return ( w >>> 15 ) ? true : false; // eslint-disable-line no-unneeded-ternary
+}
+
+
+// EXPORTS //
+
+module.exports = signbit;
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/lib/native.js b/lib/node_modules/@stdlib/number/float16/base/signbit/lib/native.js
new file mode 100644
index 000000000000..53f7ec38ea65
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/lib/native.js
@@ -0,0 +1,63 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var Boolean = require( '@stdlib/boolean/ctor' );
+var addon = require( './../src/addon.node' );
+
+
+// MAIN //
+
+/**
+* Returns a boolean indicating if the sign bit is on (true) or off (false).
+*
+* @private
+* @param {number} x - input value
+* @returns {boolean} - boolean indicating if sign bit is on or off
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+*
+* var bool = signbit( toFloat16( 4.0 ) );
+* // returns false
+*
+* @example
+* var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+*
+* var bool = signbit( toFloat16( -5.960464477539063e-8 ) );
+* // returns true
+*
+* @example
+* var bool = signbit( 0.0 );
+* // returns false
+*
+* @example
+* var bool = signbit( -0.0 );
+* // returns true
+*/
+function signbit( x ) {
+ return Boolean( addon( x ) );
+}
+
+
+// EXPORTS //
+
+module.exports = signbit;
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/manifest.json b/lib/node_modules/@stdlib/number/float16/base/signbit/manifest.json
new file mode 100644
index 000000000000..728c10803723
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/manifest.json
@@ -0,0 +1,81 @@
+{
+ "options": {
+ "task": "build",
+ "wasm": false
+ },
+ "fields": [
+ {
+ "field": "src",
+ "resolve": true,
+ "relative": true
+ },
+ {
+ "field": "include",
+ "resolve": true,
+ "relative": true
+ },
+ {
+ "field": "libraries",
+ "resolve": false,
+ "relative": false
+ },
+ {
+ "field": "libpath",
+ "resolve": true,
+ "relative": false
+ }
+ ],
+ "confs": [
+ {
+ "task": "build",
+ "wasm": false,
+ "src": [
+ "./src/main.c"
+ ],
+ "include": [
+ "./include"
+ ],
+ "libraries": [],
+ "libpath": [],
+ "dependencies": [
+ "@stdlib/number/float16/base/to-word",
+ "@stdlib/number/float64/base/to-float16",
+ "@stdlib/number/float16/ctor"
+ ]
+ },
+ {
+ "task": "benchmark",
+ "wasm": false,
+ "src": [
+ "./src/main.c"
+ ],
+ "include": [
+ "./include"
+ ],
+ "libraries": [],
+ "libpath": [],
+ "dependencies": [
+ "@stdlib/number/float16/base/to-word",
+ "@stdlib/number/float32/base/to-float16",
+ "@stdlib/number/float16/ctor"
+ ]
+ },
+ {
+ "task": "examples",
+ "wasm": false,
+ "src": [
+ "./src/main.c"
+ ],
+ "include": [
+ "./include"
+ ],
+ "libraries": [],
+ "libpath": [],
+ "dependencies": [
+ "@stdlib/number/float16/base/to-word",
+ "@stdlib/number/float32/base/to-float16",
+ "@stdlib/number/float16/ctor"
+ ]
+ }
+ ]
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/package.json b/lib/node_modules/@stdlib/number/float16/base/signbit/package.json
new file mode 100644
index 000000000000..a0848a0e7507
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/package.json
@@ -0,0 +1,76 @@
+{
+ "name": "@stdlib/number/float16/base/signbit",
+ "version": "0.0.0",
+ "description": "Return a boolean indicating if the sign bit for a half-precision floating-point number is on (true) or off (false).",
+ "license": "Apache-2.0",
+ "author": {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ },
+ "contributors": [
+ {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ }
+ ],
+ "main": "./lib",
+ "gypfile": true,
+ "directories": {
+ "benchmark": "./benchmark",
+ "doc": "./docs",
+ "example": "./examples",
+ "include": "./include",
+ "lib": "./lib",
+ "src": "./src",
+ "test": "./test"
+ },
+ "types": "./docs/types",
+ "scripts": {},
+ "homepage": "https://github.com/stdlib-js/stdlib",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/stdlib-js/stdlib.git"
+ },
+ "bugs": {
+ "url": "https://github.com/stdlib-js/stdlib/issues"
+ },
+ "dependencies": {},
+ "devDependencies": {},
+ "engines": {
+ "node": ">=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdtypes",
+ "base",
+ "utilities",
+ "utility",
+ "utils",
+ "util",
+ "types",
+ "type",
+ "signbit",
+ "sign",
+ "bit",
+ "floating-point",
+ "float16",
+ "float",
+ "half",
+ "positive",
+ "negative",
+ "ieee754",
+ "number"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/src/Makefile b/lib/node_modules/@stdlib/number/float16/base/signbit/src/Makefile
new file mode 100644
index 000000000000..7733b6180cb4
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/src/Makefile
@@ -0,0 +1,70 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+
+# RULES #
+
+#/
+# Removes generated files for building an add-on.
+#
+# @example
+# make clean-addon
+#/
+clean-addon:
+ $(QUIET) -rm -f *.o *.node
+
+.PHONY: clean-addon
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean: clean-addon
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/src/addon.c b/lib/node_modules/@stdlib/number/float16/base/signbit/src/addon.c
new file mode 100644
index 000000000000..5a78e3b343ca
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/src/addon.c
@@ -0,0 +1,90 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/number/float16/base/signbit.h"
+#include "stdlib/number/float64/base/to_float16.h"
+#include
+#include
+#include
+#include
+
+/**
+* Receives JavaScript callback invocation data.
+*
+* @param env environment under which the function is invoked
+* @param info callback data
+* @return Node-API value
+*/
+static napi_value addon( napi_env env, napi_callback_info info ) {
+ napi_status status;
+
+ // Get callback arguments:
+ size_t argc = 1;
+ napi_value argv[ 1 ];
+ status = napi_get_cb_info( env, info, &argc, argv, NULL, NULL );
+ assert( status == napi_ok );
+
+ // Check whether we were provided the correct number of arguments:
+ if ( argc < 1 ) {
+ status = napi_throw_error( env, NULL, "invalid invocation. Insufficient arguments." );
+ assert( status == napi_ok );
+ return NULL;
+ }
+ if ( argc > 1 ) {
+ status = napi_throw_error( env, NULL, "invalid invocation. Too many arguments." );
+ assert( status == napi_ok );
+ return NULL;
+ }
+
+ napi_valuetype vtype0;
+ status = napi_typeof( env, argv[ 0 ], &vtype0 );
+ assert( status == napi_ok );
+ if ( vtype0 != napi_number ) {
+ status = napi_throw_type_error( env, NULL, "invalid argument. First argument must be a number." );
+ assert( status == napi_ok );
+ return NULL;
+ }
+
+ double value;
+ status = napi_get_value_double( env, argv[ 0 ], &value );
+ assert( status == napi_ok );
+
+ int8_t out = stdlib_base_float16_signbit( stdlib_base_float64_to_float16( value ) );
+
+ napi_value v;
+ status = napi_create_int32( env, (int32_t)out, &v );
+ assert( status == napi_ok );
+
+ return v;
+}
+
+/**
+* Initializes a Node-API module.
+*
+* @param env environment under which the function is invoked
+* @param exports exports object
+* @return main export
+*/
+static napi_value init( napi_env env, napi_value exports ) {
+ napi_value fcn;
+ napi_status status = napi_create_function( env, "exports", NAPI_AUTO_LENGTH, addon, NULL, &fcn );
+ assert( status == napi_ok );
+ return fcn;
+}
+
+NAPI_MODULE( NODE_GYP_MODULE_NAME, init )
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/src/main.c b/lib/node_modules/@stdlib/number/float16/base/signbit/src/main.c
new file mode 100644
index 000000000000..d0437708e138
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/src/main.c
@@ -0,0 +1,45 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/number/float16/base/signbit.h"
+#include "stdlib/number/float16/base/to_word.h"
+#include "stdlib/number/float16/ctor.h"
+#include
+
+/**
+* Returns an integer indicating whether the sign bit for a half-precision floating-point number is on (`1`) or off (`0`).
+*
+* @param x input value
+* @return result
+*
+* @example
+* #include "stdlib/number/float16/ctor.h"
+* #include
+*
+* stdlib_float16_t x = stdlib_float16_from_bits( 51648 ); // => -11.5
+* int8_t out = stdlib_base_float16_signbit( x );
+*/
+int8_t stdlib_base_float16_signbit( const stdlib_float16_t x ) {
+ uint16_t w;
+
+ // Convert the floating-point value to a word (unsigned 16-bit integer) containing the exponent and sign:
+ stdlib_base_float16_to_word( x, &w );
+
+ // Shift off all bits which are not the sign bit and check if the sign bit is on:
+ return (int8_t)( w >> 15 );
+}
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/test/test.js b/lib/node_modules/@stdlib/number/float16/base/signbit/test/test.js
new file mode 100644
index 000000000000..0b214f7b3abb
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/test/test.js
@@ -0,0 +1,70 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var randu = require( '@stdlib/random/base/randu' );
+var round = require( '@stdlib/math/base/special/round' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var signbit = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof signbit, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function returns a boolean', function test( t ) {
+ t.strictEqual( typeof signbit( 5.0 ), 'boolean', 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns a boolean indicating if a sign bit is on (true) or off (false)', function test( t ) {
+ var bool;
+ var sign;
+ var frac;
+ var exp;
+ var x;
+ var i;
+
+ for ( i = 0; i < 5000; i++ ) {
+ if ( randu() < 0.5 ) {
+ sign = -1.0;
+ } else {
+ sign = 1.0;
+ }
+ frac = randu() * 10.0;
+ exp = round( randu()*44.0 ) - 22;
+ x = sign * frac * pow( 10.0, exp );
+ x = toFloat16( x );
+ bool = signbit( x );
+ if ( sign < 0.0 ) {
+ t.strictEqual( bool, true, 'returns true for ' + x );
+ } else {
+ t.strictEqual( bool, false, 'returns false for ' + x );
+ }
+ }
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/number/float16/base/signbit/test/test.native.js b/lib/node_modules/@stdlib/number/float16/base/signbit/test/test.native.js
new file mode 100644
index 000000000000..75b7c39d1117
--- /dev/null
+++ b/lib/node_modules/@stdlib/number/float16/base/signbit/test/test.native.js
@@ -0,0 +1,79 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var tape = require( 'tape' );
+var randu = require( '@stdlib/random/base/randu' );
+var round = require( '@stdlib/math/base/special/round' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var toFloat16 = require( '@stdlib/number/float64/base/to-float16' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+
+
+// VARIABLES //
+
+var signbit = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( signbit instanceof Error )
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', opts, function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof signbit, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function returns a boolean', opts, function test( t ) {
+ t.strictEqual( typeof signbit( 5.0 ), 'boolean', 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns a boolean indicating if a sign bit is on (true) or off (false)', opts, function test( t ) {
+ var bool;
+ var sign;
+ var frac;
+ var exp;
+ var x;
+ var i;
+
+ for ( i = 0; i < 5000; i++ ) {
+ if ( randu() < 0.5 ) {
+ sign = -1.0;
+ } else {
+ sign = 1.0;
+ }
+ frac = randu() * 10.0;
+ exp = round( randu()*44.0 ) - 22;
+ x = sign * frac * pow( 10.0, exp );
+ x = toFloat16( x );
+ bool = signbit( x );
+ if ( sign < 0.0 ) {
+ t.strictEqual( bool, true, 'returns true for ' + x );
+ } else {
+ t.strictEqual( bool, false, 'returns false for ' + x );
+ }
+ }
+ t.end();
+});