Comments

; This is a comment

Labels

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

Registers

st0
st1
ax
rax
zmm4

Strings

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

Numbers

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

Known failures

There are certain edge cases where Prism will fail. There are always such cases in every regex-based syntax highlighter. However, Prism dares to be open and honest about them. If a failure is listed here, it doesn’t mean it will never be fixed. This is more of a “known bugs” list, just with a certain type of bug.

Numbers with underscores

mov     ax,1100_1000b
mov     ax,1100_1000y
mov     ax,0b1100_1000
mov     ax,0y1100_1000

dd    1.222_222_222