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1 change: 1 addition & 0 deletions math/base/special/ldexpf/coverage.ndjson
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var toWord = require( '@stdlib/number/float32/base/to-word' );
var fromWord = require( '@stdlib/number/float32/base/from-word' );
var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
var FLOAT32_EXPONENT_MASK = require( '@stdlib/constants/float32/exponent-mask' );
var FLOAT32_PRECISION = require( '@stdlib/constants/float32/precision' );
var FLOAT32_ABS_MASK = require( '@stdlib/constants/float32/abs-mask' );
&nbsp;
&nbsp;
// VARIABLES //
&nbsp;
var TWO25 = 33554432.0; // 0x4c000000
var TWOM25 = 2.9802322387695312e-8; // 0x33000000
var FLOAT32_SIGNIFICAND_MASK_WITH_SIGN = 0x807fffff; // 1 00000000 11111111111111111111111
var ALL_ONES = 0xff; // 0xff = 255 =&gt; 11111111
&nbsp;
&nbsp;
// MAIN //
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frac = float64ToFloat32( frac );
ix = toWord( frac );
&nbsp;
// Extract exponent
k = ( ix &amp; 0x7f800000 ) &gt;&gt; 23;
// Extract exponent:
k = ( ix &amp; FLOAT32_EXPONENT_MASK ) &gt;&gt; ( FLOAT32_PRECISION - 1 );
&nbsp;
// 0 or subnormal frac
// 0 or subnormal frac:
if ( k === 0 ) {
if ( ( ix &amp; 0x7fffffff ) === 0 ) {
// +-0
if ( ( ix &amp; FLOAT32_ABS_MASK ) === 0 ) {
// +-0:
return frac;
}
frac = float64ToFloat32( frac * TWO25 );
ix = toWord( frac );
k = ( ( ix &amp; 0x7f800000 ) &gt;&gt; 23 ) - 25;
k = ( ( ix &amp; FLOAT32_EXPONENT_MASK ) &gt;&gt; ( FLOAT32_PRECISION - 1 ) ) - 25;
if ( exp &lt; -50000 ) {
// Underflow
// Underflow:
return 0.0;
}
}
&nbsp;
// NaN or Inf
if ( k === 0xff ) {
// NaN or Inf:
if ( k === ALL_ONES ) {
return float64ToFloat32( frac + frac );
}
k += exp;
if ( k &gt; 0xfe ) {
// Overflow
k = ( k + exp ) | 0;
if ( k &gt; ALL_ONES - 1 ) {
// Overflow:
return copysignf( PINF, frac );
}
if ( k &gt; 0 ) {
// Normal result
frac = fromWord( ( ix &amp; 0x807fffff ) | ( k &lt;&lt; 23 ) );
// Normal result:
frac = fromWord( ( ix &amp; FLOAT32_SIGNIFICAND_MASK_WITH_SIGN ) | ( k &lt;&lt; ( FLOAT32_PRECISION - 1 ) ) );
return frac;
}
if ( k &lt;= -25 ) {
if ( exp &gt; 50000 ) <span class="branch-0 cbranch-no" title="branch not covered" >{</span>
<span class="cstat-no" title="statement not covered" > // In case of integer overflow in n + k</span>
<span class="cstat-no" title="statement not covered" > return copysignf( PINF, frac );</span>
<span class="cstat-no" title="statement not covered" > }</span>
if ( exp &gt; 50000 ) {
// In case of integer overflow in n + k:
return copysignf( PINF, frac );
}
&nbsp;
// Underflow
// Underflow:
return copysignf( 0.0, frac );
}
&nbsp;
// Subnormal result
// Subnormal result:
k += 25;
frac = fromWord( ( ix &amp; 0x807fffff ) | ( k &lt;&lt; 23 ) );
frac = fromWord( ( ix &amp; FLOAT32_SIGNIFICAND_MASK_WITH_SIGN ) | ( k &lt;&lt; ( FLOAT32_PRECISION - 1 ) ) );
return float64ToFloat32( frac * TWOM25 );
}
&nbsp;
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at 2024-11-12T02:50:33.896Z
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