fix: test errors

Author: Neerajpathak07

lib/node_modules/@stdlib/math/base/special/log2f/src/main.c

@@ -49,20 +49,22 @@ static const int32_t HIGH_BIASED_EXP_0 = 0x3f800000;
 *
 */
 float stdlib_base_log2f( const float x ) {
-	int32_t hx;
+	uint32_t hx;
 	int32_t ihx;
 	float hfsq;
 	float hi;
 	int32_t i;
 	int32_t k;
 	float lo;
+	float xc;
 	float f;
 	float R;
 	float y;
 
 	if ( stdlib_base_is_nan( x ) || x < 0.0 ) {
 		return 0.0 / 0.0; // NaN
 	}
+	xc = x;
 	stdlib_base_float32_to_word( x, &hx );
 	ihx = (int32_t)hx;
 	k = 0;
@@ -74,8 +76,8 @@ float stdlib_base_log2f( const float x ) {
 		k -= 25;
 
 		// Subnormal number, scale up x:
-		x *= TWO25;
-		stdlib_base_float32_to_word( x, &hx );
+		xc *= TWO25;
+		stdlib_base_float32_to_word( xc, &hx );
 		ihx = (int32_t)hx;
 	}
 	if ( ihx >= HIGH_MAX_NORMAL_EXP ) {
@@ -90,10 +92,10 @@ float stdlib_base_log2f( const float x ) {
 	i = ( ihx+0x4afb0d ) & HIGH_MIN_NORMAL_EXP;
 
 	// Normalize x or x/2...
-	stdlib_base_float32_from_word( (uint32_t)( ihx|( i^HIGH_BIASED_EXP_0 ) ), &x );
+	stdlib_base_float32_from_word( (uint32_t)( ihx|( i^HIGH_BIASED_EXP_0 ) ), &xc );
 	k += (i>>23);
 	y = (float)k;
-	f = x - 1.0f;
+	f = xc - 1.0f;
 	hfsq = 0.5f * f * f;
 	R = stdlib_base_kernel_log1p( f );
 
@@ -111,6 +113,7 @@ float stdlib_base_log2f( const float x ) {
 
 	hi = f - hfsq;
 	stdlib_base_float32_to_word( hi, &hx );
+	ihx = (int32_t)hx;
 	stdlib_base_float32_from_word( hx& STDLIB_CONSTANT_FLOAT64_HIGH_WORD_ABS_MASK, &hi );
 	lo = ( f - hi ) - hfsq + R;
 	return ( ( lo + hi ) * IVLN2LO ) + ( lo * IVLN2HI ) + ( hi * IVLN2HI ) + y;