5,332
edits
Branchless Programming: Difference between revisions
→Booleans
| Line 47: | Line 47: | ||
Rather than doing | Rather than doing | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="cpp"> | ||
if age > 10 | if (age > 10) { | ||
x = | x += 10; | ||
else | } else { | ||
x = | x -= 10; | ||
} | |||
</syntaxhighlight> | </syntaxhighlight> | ||
you can do | you can do | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="cpp"> | ||
x = x + (20 * (age > 10) - 10) | x = x + (20 * (age > 10) - 10); | ||
# or | # or | ||
y = age > 10 | y = age > 10; | ||
x = x + 10 * y - 10 * (1-y) | x = x + 10 * y - 10 * (1-y); | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Similarly, instead of doing | Similarly, instead of doing | ||
<syntaxhighlight> | <syntaxhighlight lang="cpp"> | ||
if age > 10 | if (age > 10) { | ||
x+ | x++; | ||
} | |||
</syntaxhighlight> | </syntaxhighlight> | ||
you can just write <code>x += age>10</code>. | you can just write <code>x += age>10</code>. | ||