in php quali sono le funzioni per testare o modificare un singolo bit in
un int64 ? per intendersi l'equivalente di BT BTR BTS in assembler (con
secondo operatore un registro) ?


--
Leonardo Boselli
Firenze, Toscana, Europa
http://i.trail.it

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

$a & $b And Bits that are set in both $a and $b are set.
$a | $b Or (inclusive or) Bits that are set in either $a or $b are set.
$a ^ $b Xor (exclusive or) Bits that are set in $a or $b but not both are
set.
~ $a Not Bits that are set in $a are not set, and vice versa.
$a << $b Shift left Shift the bits of $a $b steps to the left (each step
means "multiply by two")
$a >> $b Shift right Shift the bits of $a $b steps to the right (each step means "divide by two")

Il giorno gio 5 mag 2022 alle ore 15:21 Leonardo Boselli < leo-stretch@trail.it> ha scritto:

in php quali sono le funzioni per testare o modificare un singolo bit in
un int64 ? per intendersi l'equivalente di BT BTR BTS in assembler (con secondo operatore un registro) ?

--
Leonardo Boselli
Firenze, Toscana, Europa
http://i.trail.it

--
Giancarlo Martini
(Replace 'AAA' con '@')
mailto:giancarlo.firAAAgmail.com <giancarlomartiniAAAgmail.com>

<div dir="ltr"><table class="gmail-doctable gmail-table" style="border-collapse:collapse;border-spacing:0px;margin:0px 0px 1.5rem;width:1028px;border-color:rgb(204,204,204);color:rgb(51,51,51);font-family:&quot;Fira Sans&quot;,&quot;Source Sans Pro&quot;,
Helvetica,Arial,sans-serif;font-size:16px;background-color:rgb(242,242,242)"><tbody class="gmail-tbody"><tr style="border:1px solid rgb(204,204,204);background-color:rgb(255,255,255)"><td style="vertical-align:top;padding:0.25rem 0.5rem"><span class="
gmail-userinput" style="font-weight:bolder"><code style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:0.875rem;line-height:1.5rem;font-family:&quot;Fira Mono&quot;,&quot;Source Code Pro&quot;,monospace">$a &amp;
$b</code></span></td><td style="vertical-align:top;padding:0.25rem 0.5rem">And</td><td style="vertical-align:top;padding:0.25rem 0.5rem">Bits that are set in both <var class="gmail-varname">$a</var> and <var class="gmail-varname">$b</var> are set.</

</tr><tr style="border:1px solid rgb(204,204,204);background-color:rgb(230,230,230)"><td style="vertical-align:top;padding:0.25rem 0.5rem"><span class="gmail-userinput" style="font-weight:bolder"><code style="font-variant-numeric:normal;font-variant-

east-asian:normal;font-stretch:normal;font-size:0.875rem;line-height:1.5rem;font-family:&quot;Fira Mono&quot;,&quot;Source Code Pro&quot;,monospace">$a | $b</code></span></td><td style="vertical-align:top;padding:0.25rem 0.5rem">Or (inclusive or)</td><td
style="vertical-align:top;padding:0.25rem 0.5rem">Bits that are set in either <var class="gmail-varname">$a</var> or <var class="gmail-varname">$b</var> are set.</td></tr><tr style="border:1px solid rgb(204,204,204);background-color:rgb(255,255,255)">
<td style="vertical-align:top;padding:0.25rem 0.5rem"><span class="gmail-userinput" style="font-weight:bolder"><code style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:0.875rem;line-height:1.5rem;font-family:&
quot;Fira Mono&quot;,&quot;Source Code Pro&quot;,monospace">$a ^ $b</code></span></td><td style="vertical-align:top;padding:0.25rem 0.5rem">Xor (exclusive or)</td><td style="vertical-align:top;padding:0.25rem 0.5rem">Bits that are set in <var class="
gmail-varname">$a</var> or <var class="gmail-varname">$b</var> but not both are set.</td></tr><tr style="border:1px solid rgb(204,204,204);background-color:rgb(230,230,230)"><td style="vertical-align:top;padding:0.25rem 0.5rem"><span class="gmail-
userinput" style="font-weight:bolder"><code style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:0.875rem;line-height:1.5rem;font-family:&quot;Fira Mono&quot;,&quot;Source Code Pro&quot;,monospace">~ $a</code></
span></td><td style="vertical-align:top;padding:0.25rem 0.5rem">Not</td><td style="vertical-align:top;padding:0.25rem 0.5rem">Bits that are set in <var class="gmail-varname">$a</var> are not set, and vice versa.</td></tr><tr style="border:1px solid rgb(
204,204,204);background-color:rgb(255,255,255)"><td style="vertical-align:top;padding:0.25rem 0.5rem"><span class="gmail-userinput" style="font-weight:bolder"><code style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;
font-size:0.875rem;line-height:1.5rem;font-family:&quot;Fira Mono&quot;,&quot;Source Code Pro&quot;,monospace">$a &lt;&lt; $b</code></span></td><td style="vertical-align:top;padding:0.25rem 0.5rem">Shift left</td><td style="vertical-align:top;padding:0.
25rem 0.5rem">Shift the bits of <var class="gmail-varname">$a</var> <var class="gmail-varname">$b</var> steps to the left (each step means &quot;multiply by two&quot;)</td></tr><tr style="border:1px solid rgb(204,204,204);background-color:rgb(230,230,
230)"><td style="vertical-align:top;padding:0.25rem 0.5rem"><span class="gmail-userinput" style="font-weight:bolder"><code style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:0.875rem;line-height:1.5rem;font-
family:&quot;Fira Mono&quot;,&quot;Source Code Pro&quot;,monospace">$a &gt;&gt; $b</code></span></td><td style="vertical-align:top;padding:0.25rem 0.5rem">Shift right</td><td style="vertical-align:top;padding:0.25rem 0.5rem">Shift the bits of <var class=
"gmail-varname">$a</var> <var class="gmail-varname">$b</var> steps to the right (each step means &quot;divide by two&quot;)</td></tr></tbody></table><br class="gmail-Apple-interchange-newline"></div><br><div class="gmail_quote"><div dir="ltr" class="
gmail_attr">Il giorno gio 5 mag 2022 alle ore 15:21 Leonardo Boselli &lt;<a href="mailto:leo-stretch@trail.it">leo-stretch@trail.it</a>&gt; ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,
204,204);padding-left:1ex">in php quali sono le funzioni per testare o modificare un singolo bit in <br>
un int64 ? per intendersi l&#39;equivalente di BT BTR BTS in assembler (con <br>
secondo operatore un registro) ?<br>


--<br>
Leonardo Boselli<br>
Firenze, Toscana, Europa<br>
<a href="http://i.trail.it" rel="noreferrer" target="_blank">http://i.trail.it</a><br>

</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Giancarlo Martini</div><div>(Replace &#39;AAA&#39; con &#39;@&#39;)  <br>mailto:<a href="mailto:giancarlomartiniAAAgmail.com" target="_
blank">giancarlo.firAAAgmail.com</a><br><br></div></div></div>

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

This message is in MIME format. The first part should be readable text,
while the remaining parts are likely unreadable without MIME-aware tools.

On Thu, 5 May 2022, Giancarlo Martini wrote:

$a & $b
And
Bits that are set in both $a and $b are set.
$a | $b
Or (inclusive or)
Bits that are set in either $a or $b are set.
$a ^ $b
Xor (exclusive or)
Bits that are set in $a or $b but not both are set.
~ $a
Not
Bits that are set in $a are not set, and vice versa.
$a << $b
Shift left
Shift the bits of $a $b steps to the left (each step means "multiply by two")
$a >> $b
Shift right
Shift the bits of $a $b steps to the right (each step means "divide by two")

Questo lo sapevo, ma volevo sapere se esisteva qualcosa del tipo bt($a,$b)
che traduce direttamente nella istruzione natuiva piuttosto che
($a & (1 << $b )) che è meno efficiente.


--
Leonardo Boselli
Firenze, Toscana, Europa
http://i.trail.it

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)