60 lines
1.8 KiB
HTML
60 lines
1.8 KiB
HTML
<h2>Comments</h2>
|
|
<pre><code>; This is a comment</code></pre>
|
|
|
|
<h2>Labels</h2>
|
|
<pre><code>label1: ; a non-local label
|
|
.local: ; this is really label1.local
|
|
..@foo: ; this is a special symbol
|
|
label2: ; another non-local label
|
|
.local: ; this is really label2.local
|
|
</code></pre>
|
|
|
|
<h2>Registers</h2>
|
|
<pre><code>st0
|
|
st1
|
|
ax
|
|
rax
|
|
zmm4</code></pre>
|
|
|
|
<h2>Strings</h2>
|
|
<pre><code>
|
|
mov eax,'abcd'
|
|
|
|
db 'hello' ; string constant
|
|
db 'h','e','l','l','o' ; equivalent character constants
|
|
dd 'ninechars' ; doubleword string constant
|
|
dd 'nine','char','s' ; becomes three doublewords
|
|
db 'ninechars',0,0,0 ; and really looks like this
|
|
|
|
db `\u263a` ; UTF-8 smiley face
|
|
db `\xe2\x98\xba` ; UTF-8 smiley face
|
|
db 0E2h, 098h, 0BAh ; UTF-8 smiley face
|
|
</code></pre>
|
|
|
|
<h2>Numbers</h2>
|
|
<pre><code>mov ax,200 ; decimal
|
|
mov ax,0200 ; still decimal
|
|
mov ax,0200d ; explicitly decimal
|
|
mov ax,0d200 ; also decimal
|
|
mov ax,0c8h ; hex
|
|
mov ax,$0c8 ; hex again: the 0 is required
|
|
mov ax,0xc8 ; hex yet again
|
|
mov ax,0hc8 ; still hex
|
|
mov ax,310q ; octal
|
|
mov ax,310o ; octal again
|
|
mov ax,0o310 ; octal yet again
|
|
mov ax,0q310 ; octal yet again
|
|
mov ax,11001000b ; binary
|
|
|
|
db -0.2 ; "Quarter precision"
|
|
dw -0.5 ; IEEE 754r/SSE5 half precision
|
|
dd 1.2 ; an easy one
|
|
dd 0x1p+2 ; 1.0x2^2 = 4.0
|
|
dq 0x1p+32 ; 1.0x2^32 = 4 294 967 296.0
|
|
dq 1.e10 ; 10 000 000 000.0
|
|
dq 1.e+10 ; synonymous with 1.e10
|
|
dq 1.e-10 ; 0.000 000 000 1
|
|
dt 3.141592653589793238462 ; pi
|
|
do 1.e+4000 ; IEEE 754r quad precision
|
|
</code></pre>
|