A version of the Quake 2 source tree that should be easier to compile and run on modern *nixes.
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200 lines
4.8 KiB

.386P
.model FLAT
;
; r_aliasa.s
; x86 assembly-language Alias model transform and project code.
;
include qasm.inc
include d_if.inc
if id386
_DATA SEGMENT
Ltemp0 dd 0
Ltemp1 dd 0
_DATA ENDS
_TEXT SEGMENT
pfv0 equ 8+4
pfv1 equ 8+8
outparm equ 8+12
public _R_Alias_clip_bottom
_R_Alias_clip_bottom:
push esi
push edi
mov esi,ds:dword ptr[pfv0+esp]
mov edi,ds:dword ptr[pfv1+esp]
mov eax,ds:dword ptr[_r_refdef+rd_aliasvrectbottom]
LDoForwardOrBackward:
mov edx,ds:dword ptr[fv_v+4+esi]
mov ecx,ds:dword ptr[fv_v+4+edi]
cmp edx,ecx
jl LDoForward
mov ecx,ds:dword ptr[fv_v+4+esi]
mov edx,ds:dword ptr[fv_v+4+edi]
mov edi,ds:dword ptr[pfv0+esp]
mov esi,ds:dword ptr[pfv1+esp]
LDoForward:
sub ecx,edx
sub eax,edx
mov ds:dword ptr[Ltemp1],ecx
mov ds:dword ptr[Ltemp0],eax
fild ds:dword ptr[Ltemp1]
fild ds:dword ptr[Ltemp0]
mov edx,ds:dword ptr[outparm+esp]
mov eax,2
fdivrp st(1),st(0) ; scale
LDo3Forward:
fild ds:dword ptr[fv_v+0+esi] ; fv0v0 | scale
fild ds:dword ptr[fv_v+0+edi] ; fv1v0 | fv0v0 | scale
fild ds:dword ptr[fv_v+4+esi] ; fv0v1 | fv1v0 | fv0v0 | scale
fild ds:dword ptr[fv_v+4+edi] ; fv1v1 | fv0v1 | fv1v0 | fv0v0 | scale
fild ds:dword ptr[fv_v+8+esi] ; fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv0v0 | scale
fild ds:dword ptr[fv_v+8+edi] ; fv1v2 | fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv0v0 |
; scale
fxch st(5) ; fv0v0 | fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv1v2 |
; scale
fsub st(4),st(0) ; fv0v0 | fv0v2 | fv1v1 | fv0v1 | fv1v0-fv0v0 |
; fv1v2 | scale
fxch st(3) ; fv0v1 | fv0v2 | fv1v1 | fv0v0 | fv1v0-fv0v0 |
; fv1v2 | scale
fsub st(2),st(0) ; fv0v1 | fv0v2 | fv1v1-fv0v1 | fv0v0 |
; fv1v0-fv0v0 | fv1v2 | scale
fxch st(1) ; fv0v2 | fv0v1 | fv1v1-fv0v1 | fv0v0 |
; fv1v0-fv0v0 | fv1v2 | scale
fsub st(5),st(0) ; fv0v2 | fv0v1 | fv1v1-fv0v1 | fv0v0 |
; fv1v0-fv0v0 | fv1v2-fv0v2 | scale
fxch st(6) ; scale | fv0v1 | fv1v1-fv0v1 | fv0v0 |
; fv1v0-fv0v0 | fv1v2-fv0v2 | fv0v2
fmul st(4),st(0) ; scale | fv0v1 | fv1v1-fv0v1 | fv0v0 |
; (fv1v0-fv0v0)*scale | fv1v2-fv0v2 | fv0v2
add edi,12
fmul st(2),st(0) ; scale | fv0v1 | (fv1v1-fv0v1)*scale | fv0v0 |
; (fv1v0-fv0v0)*scale | fv1v2-fv0v2 | fv0v2
add esi,12
add edx,12
fmul st(5),st(0) ; scale | fv0v1 | (fv1v1-fv0v1)*scale | fv0v0 |
; (fv1v0-fv0v0)*scale | (fv1v2-fv0v2)*scale |
; fv0v2
fxch st(3) ; fv0v0 | fv0v1 | (fv1v1-fv0v1)*scale | scale |
; (fv1v0-fv0v0)*scale | (fv1v2-fv0v2)*scale |
; fv0v2
faddp st(4),st(0) ; fv0v1 | (fv1v1-fv0v1)*scale | scale |
; fv0v0+(fv1v0-fv0v0)*scale |
; (fv1v2-fv0v2)*scale | fv0v2
faddp st(1),st(0) ; fv0v1+(fv1v1-fv0v1)*scale | scale |
; fv0v0+(fv1v0-fv0v0)*scale |
; (fv1v2-fv0v2)*scale | fv0v2
fxch st(4) ; fv0v2 | scale | fv0v0+(fv1v0-fv0v0)*scale |
; (fv1v2-fv0v2)*scale | fv0v1+(fv1v1-fv0v1)*scale
faddp st(3),st(0) ; scale | fv0v0+(fv1v0-fv0v0)*scale |
; fv0v2+(fv1v2-fv0v2)*scale |
; fv0v1+(fv1v1-fv0v1)*scale
fxch st(1) ; fv0v0+(fv1v0-fv0v0)*scale | scale |
; fv0v2+(fv1v2-fv0v2)*scale |
; fv0v1+(fv1v1-fv0v1)*scale
fadd ds:dword ptr[float_point5]
fxch st(3) ; fv0v1+(fv1v1-fv0v1)*scale | scale |
; fv0v2+(fv1v2-fv0v2)*scale |
; fv0v0+(fv1v0-fv0v0)*scale
fadd ds:dword ptr[float_point5]
fxch st(2) ; fv0v2+(fv1v2-fv0v2)*scale | scale |
; fv0v1+(fv1v1-fv0v1)*scale |
; fv0v0+(fv1v0-fv0v0)*scale
fadd ds:dword ptr[float_point5]
fxch st(3) ; fv0v0+(fv1v0-fv0v0)*scale | scale |
; fv0v1+(fv1v1-fv0v1)*scale |
; fv0v2+(fv1v2-fv0v2)*scale
fistp ds:dword ptr[fv_v+0-12+edx] ; scale | fv0v1+(fv1v1-fv0v1)*scale |
; fv0v2+(fv1v2-fv0v2)*scale
fxch st(1) ; fv0v1+(fv1v1-fv0v1)*scale | scale |
; fv0v2+(fv1v2-fv0v2)*scale | scale
fistp ds:dword ptr[fv_v+4-12+edx] ; scale | fv0v2+(fv1v2-fv0v2)*scale
fxch st(1) ; fv0v2+(fv1v2-fv0v2)*sc | scale
fistp ds:dword ptr[fv_v+8-12+edx] ; scale
dec eax
jnz LDo3Forward
fstp st(0)
pop edi
pop esi
ret
public _R_Alias_clip_top
_R_Alias_clip_top:
push esi
push edi
mov esi,ds:dword ptr[pfv0+esp]
mov edi,ds:dword ptr[pfv1+esp]
mov eax,ds:dword ptr[_r_refdef+rd_aliasvrect+4]
jmp LDoForwardOrBackward
public _R_Alias_clip_right
_R_Alias_clip_right:
push esi
push edi
mov esi,ds:dword ptr[pfv0+esp]
mov edi,ds:dword ptr[pfv1+esp]
mov eax,ds:dword ptr[_r_refdef+rd_aliasvrectright]
LRightLeftEntry:
mov edx,ds:dword ptr[fv_v+4+esi]
mov ecx,ds:dword ptr[fv_v+4+edi]
cmp edx,ecx
mov edx,ds:dword ptr[fv_v+0+esi]
mov ecx,ds:dword ptr[fv_v+0+edi]
jl LDoForward2
mov ecx,ds:dword ptr[fv_v+0+esi]
mov edx,ds:dword ptr[fv_v+0+edi]
mov edi,ds:dword ptr[pfv0+esp]
mov esi,ds:dword ptr[pfv1+esp]
LDoForward2:
jmp LDoForward
public _R_Alias_clip_left
_R_Alias_clip_left:
push esi
push edi
mov esi,ds:dword ptr[pfv0+esp]
mov edi,ds:dword ptr[pfv1+esp]
mov eax,ds:dword ptr[_r_refdef+rd_aliasvrect+0]
jmp LRightLeftEntry
_TEXT ENDS
endif ;id386
END