224 lines
5.4 KiB
PHP
224 lines
5.4 KiB
PHP
|
;-----------------------------------------------------------------------;
|
||
|
|
; CVT.INC
|
||
|
|
;
|
||
|
|
; This module contains macros that generate 16-bit code to convert
|
||
|
|
; structures in either direction between 16-bit and 32-bit definitions.
|
||
|
|
;
|
||
|
|
; USE THIS EVERYWHERE! USE THESE IN PACKING MACROS! THESE ARE AS
|
||
|
|
; SMALL AND FAST AS INLINE IS EVER GOING TO BE. DO NOT WRITE YOUR OWN.
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; srcadj
|
||
|
|
; adj amount by which to adjust source pointer (DS:ESI)
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
srcadj macro adj
|
||
|
|
ifnb <adj>
|
||
|
|
add esi,adj
|
||
|
|
endif
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; dstadj
|
||
|
|
; adj amount by which to adjust destination pointer (ES:EDI)
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
dstadj macro adj
|
||
|
|
ifnb <adj>
|
||
|
|
add edi,adj
|
||
|
|
endif
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copyw -- Copy a word
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copyw macro adj
|
||
|
|
srcadj adj
|
||
|
|
movsw es:[edi],ds:[esi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; ncopyw -- Copy N words
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
ncopyw macro count:req
|
||
|
|
mov ecx, count
|
||
|
|
rep movsw es:[edi], ds:[esi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copyd -- Copy a dword
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copyd macro adj
|
||
|
|
srcadj adj
|
||
|
|
movsd es:[edi],ds:[esi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; ncopyd -- Copy N dwords
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
ncopyd macro count:req
|
||
|
|
mov ecx, count
|
||
|
|
rep movsd es:[edi],ds:[esi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copysx -- Sign-extend an INT to a LONG
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copysx macro adj
|
||
|
|
srcadj adj
|
||
|
|
lodsw ds:[si]
|
||
|
|
cwde
|
||
|
|
stosd es:[edi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------;
|
||
|
|
; ncopysx - Sign-extend N INTs to LONGs
|
||
|
|
;------------------------------------------------------------------------;
|
||
|
|
ncopysx macro count:req, adj
|
||
|
|
local m1
|
||
|
|
|
||
|
|
mov cx, count
|
||
|
|
m1:
|
||
|
|
copysx adj
|
||
|
|
loop m1
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copysx2 -- Copy and sign-extend a word to a dword, mapping 8000h
|
||
|
|
; to 80000000h.
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copysx2 macro adj
|
||
|
|
local sign_extend_it
|
||
|
|
local store_it
|
||
|
|
|
||
|
|
srcadj adj
|
||
|
|
lodsw ds:[si]
|
||
|
|
cmp ax,8000h
|
||
|
|
jne sign_extend_it
|
||
|
|
|
||
|
|
ror eax,16
|
||
|
|
sub ax,ax
|
||
|
|
jmp short store_it
|
||
|
|
|
||
|
|
sign_extend_it:
|
||
|
|
cwde
|
||
|
|
|
||
|
|
store_it:
|
||
|
|
stosd es:[edi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; ncopysx2
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
ncopysx2 macro count:req, adj
|
||
|
|
local m1
|
||
|
|
|
||
|
|
mov cx, count
|
||
|
|
m1:
|
||
|
|
copysx2 adj
|
||
|
|
loop m1
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copyzx -- Copy and zero-extend a word to a dword
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copyzx macro adj
|
||
|
|
srcadj adj
|
||
|
|
lodsw ds:[si]
|
||
|
|
movzx eax,ax
|
||
|
|
stosd es:[edi]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; ncopyzx -- Zero-extend N WORDs to DWORDs
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
ncopyzx macro count:req
|
||
|
|
local m1
|
||
|
|
|
||
|
|
xor eax, eax
|
||
|
|
mov cx, count
|
||
|
|
m1:
|
||
|
|
lodsw ds:[si]
|
||
|
|
stosd es:[edi]
|
||
|
|
loop m1
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copyt -- Copy and truncate a dword to a word
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copyt macro adj
|
||
|
|
srcadj adj
|
||
|
|
lodsd ds:[esi]
|
||
|
|
stosw es:[di]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; ncopyt -- Truncate N DWORDs to WORDs
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
ncopyt macro count:req
|
||
|
|
local m1
|
||
|
|
|
||
|
|
mov cx, count
|
||
|
|
m1:
|
||
|
|
lodsd ds:[esi]
|
||
|
|
stosw es:[di]
|
||
|
|
loop m1
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; copyt2 -- Copy and truncate a dword to a word, mapping 80000000
|
||
|
|
; to 8000.
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
copyt2 macro adj
|
||
|
|
local store_it
|
||
|
|
|
||
|
|
srcadj adj
|
||
|
|
lodsd ds:[esi] ;get dword value
|
||
|
|
cmp eax,80000000h ;is just the high bit set?
|
||
|
|
jne store_it ;if not, just truncate
|
||
|
|
ror eax,16 ;if yes, store 8000h
|
||
|
|
store_it:
|
||
|
|
stosw es:[di]
|
||
|
|
endm
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
; ncopyt2 -- Truncate N special DWORDs to WORDs
|
||
|
|
;-----------------------------------------------------------------------;
|
||
|
|
ncopyt2 macro count:req, adj
|
||
|
|
local m1
|
||
|
|
|
||
|
|
mov cx, count
|
||
|
|
m1:
|
||
|
|
copyt2 adj
|
||
|
|
loop m1
|
||
|
|
endm
|
||
|
|
|