test: add tests for IEEE 754-2019 compliance

[anandkaranubc]

Progresses #365

Description

What is the purpose of this pull request?

This pull request:

• Adds all the tests for testing special cases of log*

Related Issues

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This pull request:

• progresses Add tests for IEEE 754-2019 compliance #365

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No.

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• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[anandkaranubc]

All checked!

[Planeshifter]

@anandkaranubc Per failing CI checks, looks like our log10 might not behave as expected for -0. Would you mind taking a look, please?

[anandkaranubc]

Haha, was in the middle of writing the reason :)

Oops, there is a bug. log2 and log10 don't return NINF when x = -0.0. But it works in C.

Mainly because of no type casting on hx in JS.

stdlib/lib/node_modules/@stdlib/math/base/special/log2/lib/main.js

Lines 118 to 126 in 7966727

	toWords.assign( x, WORDS, 1, 0 );
	hx = WORDS[ 0 ];
	lx = WORDS[ 1 ];
	k = 0|0; // asm type annotation
	if ( hx < HIGH_MIN_NORMAL_EXP ) {
	// Case: x < 2**-1022
	if ( ( (hx&ABS_MASK) | lx ) === 0 ) {
	return NINF;
	}

hx still remains a "huge" positive number here and isn't less than HIGH_MIN_NORMAL_EXP

But in C,

Typecasting it back again in int32_t makes it negative again.

stdlib/lib/node_modules/@stdlib/math/base/special/log2/src/main.c

Lines 71 to 79 in 7966727

	xc = x;
	stdlib_base_float64_to_words( xc, &hx, &lx );
	ihx = (int32_t)hx;
	k = 0;
	if ( ihx < HIGH_MIN_NORMAL_EXP ) {
	// Case: x < 2**-1022
	if ( ( ( ihx & STDLIB_CONSTANT_FLOAT64_HIGH_WORD_ABS_MASK ) | lx ) == 0 ) {
	return STDLIB_CONSTANT_FLOAT64_NINF;
	}

cc: @Planeshifter @kgryte