diff --git a/lib/node_modules/@stdlib/math/base/special/ln/test/test.js b/lib/node_modules/@stdlib/math/base/special/ln/test/test.js
index 1715b0f097a4..1b7098b80ff5 100644
--- a/lib/node_modules/@stdlib/math/base/special/ln/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/ln/test/test.js
@@ -26,6 +26,7 @@ var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var abs = require( '@stdlib/math/base/special/abs' );
+var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var ln = require( './../lib' );
 
 
@@ -209,8 +210,9 @@ tape( 'the function evaluates the natural logarithm of `x` (subnormal values)',
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', function test( t ) {
-	t.strictEqual( ln( 0.0 ), NINF, 'equals -infinity' );
+tape( 'the function returns `-infinity` if provided `+-0`', function test( t ) {
+	t.strictEqual( ln( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( ln( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
@@ -224,3 +226,9 @@ tape( 'the function returns `NaN` if provided a negative number', function test(
 	t.strictEqual( isnan( v ), true, 'returns NaN' );
 	t.end();
 });
+
+tape( 'the function returns positive zero if provided `1.0`', function test( t ) {
+	var v = ln( 1.0 );
+	t.strictEqual( isPositiveZero( v ), true, 'returns expected value' );
+	t.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/ln/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/ln/test/test.native.js
index 96eb31324716..27cf0b403993 100644
--- a/lib/node_modules/@stdlib/math/base/special/ln/test/test.native.js
+++ b/lib/node_modules/@stdlib/math/base/special/ln/test/test.native.js
@@ -27,6 +27,7 @@ var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var abs = require( '@stdlib/math/base/special/abs' );
+var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -218,8 +219,9 @@ tape( 'the function evaluates the natural logarithm of `x` (subnormal values)',
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', opts, function test( t ) {
-	t.strictEqual( ln( 0.0 ), NINF, 'equals -infinity' );
+tape( 'the function returns `-infinity` if provided `+-0`', opts, function test( t ) {
+	t.strictEqual( ln( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( ln( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
@@ -233,3 +235,9 @@ tape( 'the function returns `NaN` if provided a negative number', opts, function
 	t.strictEqual( isnan( v ), true, 'returns NaN' );
 	t.end();
 });
+
+tape( 'the function returns positive zero if provided `1.0`', opts, function test( t ) {
+	var v = ln( 1.0 );
+	t.strictEqual( isPositiveZero( v ), true, 'returns expected value' );
+	t.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/lnf/test/test.js b/lib/node_modules/@stdlib/math/base/special/lnf/test/test.js
index cef5f3fca270..cb4d95f70afc 100644
--- a/lib/node_modules/@stdlib/math/base/special/lnf/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/lnf/test/test.js
@@ -27,6 +27,7 @@ var NINF = require( '@stdlib/constants/float32/ninf' );
 var EPS = require( '@stdlib/constants/float32/eps' );
 var abs = require( '@stdlib/math/base/special/abs' );
 var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
+var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var lnf = require( './../lib' );
 
 
@@ -224,8 +225,9 @@ tape( 'the function evaluates the natural logarithm of `x` (subnormal values)',
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', function test( t ) {
+tape( 'the function returns `-infinity` if provided `+-0`', function test( t ) {
 	t.strictEqual( lnf( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( lnf( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
@@ -239,3 +241,9 @@ tape( 'the function returns `NaN` if provided a negative number', function test(
 	t.strictEqual( isnanf( v ), true, 'returns expected value' );
 	t.end();
 });
+
+tape( 'the function returns positive zero if provided `1.0`', function test( t ) {
+	var v = lnf( 1.0 );
+	t.strictEqual( isPositiveZero( v ), true, 'returns expected value' );
+	t.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/lnf/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/lnf/test/test.native.js
index e5c5e720d1d0..4648759a52e9 100644
--- a/lib/node_modules/@stdlib/math/base/special/lnf/test/test.native.js
+++ b/lib/node_modules/@stdlib/math/base/special/lnf/test/test.native.js
@@ -28,6 +28,7 @@ var NINF = require( '@stdlib/constants/float32/ninf' );
 var EPS = require( '@stdlib/constants/float32/eps' );
 var abs = require( '@stdlib/math/base/special/abs' );
 var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
+var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -233,8 +234,9 @@ tape( 'the function evaluates the natural logarithm of `x` (subnormal values)',
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', opts, function test( t ) {
+tape( 'the function returns `-infinity` if provided `+-0`', opts, function test( t ) {
 	t.strictEqual( lnf( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( lnf( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
@@ -248,3 +250,9 @@ tape( 'the function returns `NaN` if provided a negative number', opts, function
 	t.strictEqual( isnanf( v ), true, 'returns expected value' );
 	t.end();
 });
+
+tape( 'the function returns positive zero if provided `1.0`', opts, function test( t ) {
+	var v = lnf( 1.0 );
+	t.strictEqual( isPositiveZero( v ), true, 'returns expected value' );
+	t.end();
+});
diff --git a/lib/node_modules/@stdlib/math/base/special/log/test/test.js b/lib/node_modules/@stdlib/math/base/special/log/test/test.js
index 63b496358f06..126c53202cf2 100644
--- a/lib/node_modules/@stdlib/math/base/special/log/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/log/test/test.js
@@ -26,6 +26,9 @@ var randu = require( '@stdlib/random/base/randu' );
 var round = require( '@stdlib/math/base/special/round' );
 var ln = require( '@stdlib/math/base/special/ln' );
 var EPS = require( '@stdlib/constants/float64/eps' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var log = require( './../lib' );
 
 
@@ -68,6 +71,35 @@ tape( 'the function returns `1.0` if provided `x` and `b` such that `x = b` (exc
 	t.end();
 });
 
+tape( 'the function returns `+infinity` if provided `x = +infinity` and a valid `b`', function test( t ) {
+	t.equal( log( PINF, 1.0 ), PINF, 'returns expected value' );
+	t.equal( log( PINF, 2.0 ), PINF, 'returns expected value' );
+	t.equal( log( PINF, 10.0 ), PINF, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns `-infinity` if provided `x = +-0` and a valid `b`', function test( t ) {
+	t.equal( log( 0.0, 1.0 ), NINF, 'returns expected value' );
+	t.equal( log( 0.0, 2.0 ), NINF, 'returns expected value' );
+	t.equal( log( 0.0, 10.0 ), NINF, 'returns expected value' );
+	t.equal( log( -0.0, 1.0 ), NINF, 'returns expected value' );
+	t.equal( log( -0.0, 2.0 ), NINF, 'returns expected value' );
+	t.equal( log( -0.0, 10.0 ), NINF, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns positive zero if provided `x = 1.0` and a valid `b`', function test( t ) {
+	var v;
+
+	v = log( 1.0, 2.0 );
+	t.equal( isPositiveZero( v ), true, 'returns expected value' );
+
+	v = log( 1.0, 10.0 );
+	t.equal( isPositiveZero( v ), true, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function returns `ln(x) / ln(b)`', function test( t ) {
 	var b;
 	var x;
diff --git a/lib/node_modules/@stdlib/math/base/special/log/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/log/test/test.native.js
index ad843704c813..7821625a0d31 100644
--- a/lib/node_modules/@stdlib/math/base/special/log/test/test.native.js
+++ b/lib/node_modules/@stdlib/math/base/special/log/test/test.native.js
@@ -27,6 +27,9 @@ var randu = require( '@stdlib/random/base/randu' );
 var round = require( '@stdlib/math/base/special/round' );
 var ln = require( '@stdlib/math/base/special/ln' );
 var EPS = require( '@stdlib/constants/float64/eps' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -77,6 +80,35 @@ tape( 'the function returns `1.0` if provided `x` and `b` such that `x = b` (exc
 	t.end();
 });
 
+tape( 'the function returns `+infinity` if provided `x = +infinity` and a valid `b`', opts, function test( t ) {
+	t.equal( log( PINF, 1.0 ), PINF, 'returns expected value' );
+	t.equal( log( PINF, 2.0 ), PINF, 'returns expected value' );
+	t.equal( log( PINF, 10.0 ), PINF, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns `-infinity` if provided `x = +-0` and a valid `b`', opts, function test( t ) {
+	t.equal( log( 0.0, 1.0 ), NINF, 'returns expected value' );
+	t.equal( log( 0.0, 2.0 ), NINF, 'returns expected value' );
+	t.equal( log( 0.0, 10.0 ), NINF, 'returns expected value' );
+	t.equal( log( -0.0, 1.0 ), NINF, 'returns expected value' );
+	t.equal( log( -0.0, 2.0 ), NINF, 'returns expected value' );
+	t.equal( log( -0.0, 10.0 ), NINF, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns positive zero if provided `x = 1.0` and a valid `b`', opts, function test( t ) {
+	var v;
+
+	v = log( 1.0, 2.0 );
+	t.equal( isPositiveZero( v ), true, 'returns expected value' );
+
+	v = log( 1.0, 10.0 );
+	t.equal( isPositiveZero( v ), true, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function returns `ln(x) / ln(b)`', opts, function test( t ) {
 	var b;
 	var x;
diff --git a/lib/node_modules/@stdlib/math/base/special/log10/lib/main.js b/lib/node_modules/@stdlib/math/base/special/log10/lib/main.js
index ace00b03412d..7ef530d2d296 100644
--- a/lib/node_modules/@stdlib/math/base/special/log10/lib/main.js
+++ b/lib/node_modules/@stdlib/math/base/special/log10/lib/main.js
@@ -119,7 +119,7 @@ function log10( x ) {
 		return NaN;
 	}
 	toWords.assign( x, WORDS, 1, 0 );
-	hx = WORDS[ 0 ];
+	hx = WORDS[ 0 ] | 0; // asm type annotation
 	lx = WORDS[ 1 ];
 	k = 0|0; // asm type annotation
 
@@ -132,7 +132,7 @@ function log10( x ) {
 
 		// Subnormal number, scale up x:
 		x *= TWO54;
-		hx = getHighWord( x );
+		hx = getHighWord( x ) | 0; // asm type annotation
 	}
 	if ( hx >= HIGH_MAX_NORMAL_EXP ) {
 		return x + x;
diff --git a/lib/node_modules/@stdlib/math/base/special/log10/test/test.js b/lib/node_modules/@stdlib/math/base/special/log10/test/test.js
index c12dbd266f26..ccbc8f46ff2a 100644
--- a/lib/node_modules/@stdlib/math/base/special/log10/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/log10/test/test.js
@@ -210,8 +210,9 @@ tape( 'the function evaluates the common logarithm of `x` (subnormal values)', f
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', function test( t ) {
+tape( 'the function returns `-infinity` if provided `+-0`', function test( t ) {
 	t.strictEqual( log10( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( log10( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
diff --git a/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js
index bec5e5566a0e..51fa687d72d4 100644
--- a/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js
+++ b/lib/node_modules/@stdlib/math/base/special/log10/test/test.native.js
@@ -219,8 +219,9 @@ tape( 'the function evaluates the common logarithm of `x` (subnormal values)', o
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', opts, function test( t ) {
+tape( 'the function returns `-infinity` if provided `+-0`', opts, function test( t ) {
 	t.strictEqual( log10( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( log10( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
diff --git a/lib/node_modules/@stdlib/math/base/special/log2/lib/main.js b/lib/node_modules/@stdlib/math/base/special/log2/lib/main.js
index 7860d7af1f6b..80019d4c6cb1 100644
--- a/lib/node_modules/@stdlib/math/base/special/log2/lib/main.js
+++ b/lib/node_modules/@stdlib/math/base/special/log2/lib/main.js
@@ -116,7 +116,7 @@ function log2( x ) {
 		return NaN;
 	}
 	toWords.assign( x, WORDS, 1, 0 );
-	hx = WORDS[ 0 ];
+	hx = WORDS[ 0 ] | 0; // asm type annotation
 	lx = WORDS[ 1 ];
 	k = 0|0; // asm type annotation
 	if ( hx < HIGH_MIN_NORMAL_EXP ) {
@@ -128,7 +128,7 @@ function log2( x ) {
 
 		// Subnormal number, scale up x:
 		x *= TWO54;
-		hx = getHighWord( x );
+		hx = getHighWord( x ) | 0; // asm type annotation
 	}
 	if ( hx >= HIGH_MAX_NORMAL_EXP ) {
 		return x + x;
diff --git a/lib/node_modules/@stdlib/math/base/special/log2/test/test.js b/lib/node_modules/@stdlib/math/base/special/log2/test/test.js
index 2e18a3acb328..72ea2634cf17 100644
--- a/lib/node_modules/@stdlib/math/base/special/log2/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/log2/test/test.js
@@ -210,8 +210,9 @@ tape( 'the function evaluates the binary logarithm of `x` (subnormal values)', f
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', function test( t ) {
+tape( 'the function returns `-infinity` if provided `+-0`', function test( t ) {
 	t.strictEqual( log2( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( log2( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });
 
diff --git a/lib/node_modules/@stdlib/math/base/special/log2/test/test.native.js b/lib/node_modules/@stdlib/math/base/special/log2/test/test.native.js
index df1b77609855..1e6577984df8 100644
--- a/lib/node_modules/@stdlib/math/base/special/log2/test/test.native.js
+++ b/lib/node_modules/@stdlib/math/base/special/log2/test/test.native.js
@@ -219,8 +219,9 @@ tape( 'the function evaluates the binary logarithm of `x` (subnormal values)', o
 	t.end();
 });
 
-tape( 'the function returns `-infinity` if provided `0`', opts, function test( t ) {
+tape( 'the function returns `-infinity` if provided `+-0`', opts, function test( t ) {
 	t.strictEqual( log2( 0.0 ), NINF, 'returns expected value' );
+	t.strictEqual( log2( -0.0 ), NINF, 'returns expected value' );
 	t.end();
 });