mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 20:55:19 +00:00
307 lines
7.1 KiB
ArmAsm
307 lines
7.1 KiB
ArmAsm
@ ScummVM Scumm Interpreter
|
|
@ Copyright (C) 2007 The ScummVM project
|
|
@
|
|
@ This program is free software@ you can redistribute it and/or
|
|
@ modify it under the terms of the GNU General Public License
|
|
@ as published by the Free Software Foundation@ either version 2
|
|
@ of the License, or (at your option) any later version.
|
|
@
|
|
@ This program is distributed in the hope that it will be useful,
|
|
@ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
@ GNU General Public License for more details.
|
|
@
|
|
@ You should have received a copy of the GNU General Public License
|
|
@ along with this program@ if not, write to the Free Software
|
|
@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
@
|
|
@ $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/engines/scumm/gfxARM.s $
|
|
@ $Id: gfxARM.s 29646 2007-11-26 16:54:56Z fingolfin $
|
|
@
|
|
@ @author Robin Watts (robin@wss.co.uk)
|
|
|
|
.text
|
|
|
|
.global ClassicProc3RendererShadowARM
|
|
|
|
|
|
.equ _scaleIndexY , 112
|
|
.equ _numStrips , 108
|
|
.equ _palette , 104
|
|
.equ _shadow_table , 100
|
|
.equ _scaleIndexX , 96
|
|
.equ _scaleX , 92
|
|
.equ _height , 88
|
|
.equ store_r14 , 84
|
|
.equ store_r11 , 80
|
|
.equ store_r10 , 76
|
|
.equ store_r9 , 72
|
|
.equ store_r8 , 68
|
|
.equ store_r7 , 64
|
|
.equ store_r6 , 60
|
|
.equ store_r5 , 56
|
|
.equ store_r4 , 52
|
|
.equ src , 48
|
|
.equ height , 44
|
|
.equ len , 40
|
|
.equ v1_shr , 36
|
|
.equ v1_skip_width , 32
|
|
.equ v1_destptr , 28
|
|
.equ v1_scaleXstep , 24
|
|
.equ v1_mask_ptr , 20
|
|
.equ v1_y , 16
|
|
.equ v1_scaletable , 12
|
|
.equ pitch , 8
|
|
.equ scaleIdxXPtr , 4
|
|
.equ scaleIdxYPtr , 0
|
|
|
|
.equ space , 48
|
|
|
|
@ r0 = _scaleY
|
|
@ r1 = v1
|
|
@ r2 = _out
|
|
@ r3 = src
|
|
@ <> = _height
|
|
@ <> = _scaleX
|
|
@ <> = _scaleIndexX
|
|
@ <> = _shadow_table
|
|
@ <> = _palette
|
|
@ <> = _numstrips
|
|
@ <> = _scaleIndexY
|
|
ClassicProc3RendererShadowARM:
|
|
@ shadow20 = false
|
|
@ shadowed = true
|
|
@ unscaled = false
|
|
STMFD r13!,{r3-r11,r14}
|
|
LDRH r6,[r2,#2]
|
|
LDRH r7,[r2] @ r7 = _out.w
|
|
LDRH r8,[r2,#4] @ r8 = _out.pitch
|
|
ADD r6,r6,#1 @ r6 = _out.h+1
|
|
SUB r13,r13,#space
|
|
STR r3,[r13,#src]
|
|
STR r8,[r13,#pitch]
|
|
LDMIA r1,{r3,r4,r5,r8,r9,r10,r11}
|
|
@ r3 = v1.x
|
|
@ r4 = v1.y
|
|
@ r5 = scaletable
|
|
@ r8 = skip_width
|
|
@ r9 = destptr
|
|
@ r10= mask_ptr
|
|
@ r11= scaleXstep
|
|
LDR r2, [r13,#_scaleIndexY]
|
|
LDR r12,[r13,#_scaleIndexX]
|
|
STR r4, [r13,#v1_y]
|
|
STR r5, [r13,#v1_scaletable]
|
|
ADD r2, r5,r2 @ r2 = &scaletable[_scaleIndexY]
|
|
ADD r5, r5,r12 @ r5 = &scaletable[_scaleIndexX]
|
|
STR r5, [r13,#scaleIdxXPtr]
|
|
STR r2, [r13,#scaleIdxYPtr]
|
|
STR r8, [r13,#v1_skip_width]
|
|
|
|
LDRB r8, [r1,#29] @ r8 = shr
|
|
LDRB r14,[r1,#31] @ r14= replen
|
|
LDRB r1, [r1,#30] @ r1 = repcolor
|
|
STR r8, [r13,#v1_shr]
|
|
STR r9, [r13,#v1_destptr]
|
|
STR r10,[r13,#v1_mask_ptr]
|
|
STR r11,[r13,#v1_scaleXstep]
|
|
|
|
LDR r12,[r13,#_height]
|
|
|
|
@ r0 = _scaleY
|
|
@ r1 = v1.repcolor
|
|
@ r2 = &v1.scaletable[scaleIndexY]
|
|
@ r3 = v1.x
|
|
@ r4 = v1.y
|
|
@ r5 =
|
|
@ r6 = _out.h+1
|
|
@ r7 = _out.w
|
|
@ r8 =
|
|
@ r9 = v1.destptr
|
|
@ r10= v1.mask_ptr
|
|
@ r11=
|
|
@ r12= _height
|
|
@ r14= v1.replen
|
|
|
|
MOV r8,#0x80
|
|
AND r11,r3,#7 @ r11= v1.x & 7
|
|
MOV r8,r8,LSR r11 @ r8 = maskbit = revBitMask(v1.x & 7)
|
|
ADD r10,r10,r3,ASR #3 @ r10= mask = v1.mask_ptr + (v1.x>>3)
|
|
|
|
@ r0 = _scaleY
|
|
@ r1 = color = v1.repcolor
|
|
@ r2 = &v1.scaletable[scaleIndexY]
|
|
@ r3 = v1.x
|
|
@ r4 = y = v1.y
|
|
@ r5 =
|
|
@ r6 = _out.h+1
|
|
@ r7 = _out.w
|
|
@ r8 = maskbit
|
|
@ r9 = v1.destptr
|
|
@ r10= mask
|
|
@ r11=
|
|
@ r12= height = _height
|
|
@ r14= len = v1.replen
|
|
CMP r14,#0
|
|
BEQ outerloop
|
|
ADD r12,r12,#1 @ r12= height++
|
|
MOV r5,r12 @ r5 = loopCount = height
|
|
CMP r5,r14 @ if (loopCount > len)
|
|
MOVGT r5,r14 @ loopCount = len
|
|
SUB r12,r12,r5
|
|
SUB r14,r14,r5
|
|
STR r12,[r13,#height]
|
|
STR r14,[r13,#len]
|
|
LDR r12,[r13,#pitch]
|
|
B startpos
|
|
|
|
outerloop:
|
|
@ r0 = _scaleY
|
|
@ r1 = color
|
|
@ r2 = &v1.scaletable[scaleIndexY]
|
|
@ r3 = x
|
|
@ r4 = y
|
|
@ r5 =
|
|
@ r6 = _out.h+1
|
|
@ r7 = _out.w
|
|
@ r8 = maskbit
|
|
@ r9 = dst
|
|
@ r10= mask
|
|
@ r11=
|
|
@ r12= height
|
|
@ r14=
|
|
|
|
LDR r11,[r13,#src]
|
|
LDR r5,[r13,#v1_shr]
|
|
@ stall
|
|
LDRB r14,[r11],#1 @ r14= len = *src++
|
|
@ stall
|
|
@ stall
|
|
MOV r1, r14,LSR r5 @ r1 = color = len>>v1.shr
|
|
BICS r14,r14,r1,LSL r5 @ r14= len
|
|
LDREQB r14,[r11],#1 @ if (!len) r14 = len = *src++
|
|
STR r11,[r13,#src]
|
|
middleloop:
|
|
@ r0 = _scaleY
|
|
@ r1 = color
|
|
@ r2 = &v1.scaletable[scaleIndexY]
|
|
@ r3 = x
|
|
@ r4 = y
|
|
@ r5 = loopCount = min(height,len)
|
|
@ r6 = _out.h+1
|
|
@ r7 = _out.w
|
|
@ r8 = maskbit
|
|
@ r9 = dst
|
|
@ r10= mask
|
|
@ r11=
|
|
@ r12= height
|
|
@ r14= len
|
|
|
|
MOV r5,r12 @ loopCount = height
|
|
CMP r5,r14 @ if (loopCount > len)
|
|
MOVGT r5,r14 @ loopCount = len
|
|
SUB r12,r12,r5 @ height -= loopCount
|
|
SUB r14,r14,r5 @ len -= loopCount
|
|
STR r12,[r13,#height]
|
|
STR r14,[r13,#len]
|
|
|
|
LDR r11,[r13,#_numStrips]
|
|
LDR r12,[r13,#pitch]
|
|
@ r0 = _scaleY
|
|
@ r1 = color
|
|
@ r2 = &v1.scaletable[scaleIndexY]
|
|
@ r3 = x
|
|
@ r4 = y
|
|
@ r5 = loopCount = min(height,len)
|
|
@ r6 = _out.h+1
|
|
@ r7 = _out.w
|
|
@ r8 = maskbit
|
|
@ r9 = dst
|
|
@ r10= mask
|
|
@ r11= _numStrips
|
|
@ r12= _out.pitch
|
|
@ r14= scratch
|
|
innerloop:
|
|
@ inner loop
|
|
CMP r0,#254 @ if _scaleY <= 254
|
|
LDRLEB r14,[r2],#1 @ r14 = v1.scaletable[scaleIndexY++]
|
|
@ stallLE
|
|
@ stallLE
|
|
CMPLE r0,r14 @ || _scaleY >= r14
|
|
BLE startpos
|
|
|
|
LDRB r14,[r10],r11 @ r14 = mask[0] mask += _numStrips
|
|
ADDS r4,r4,#1 @ y >= 0 (equiv to y>-1,y+1>0)
|
|
CMPGT r1,#0 @ && color > 0
|
|
CMPGT r6,r4 @ && _out.h+1 > y+1
|
|
CMNGT r3,#1 @ && x >= 0 (equiv to x>-1,x+1>0)
|
|
CMPGT r7,r3 @ && _out.w > x
|
|
BLE masked
|
|
TST r14,r8 @ && !(mask[0] && maskbit)
|
|
LDREQ r14,[r13,#_palette]
|
|
BNE masked
|
|
|
|
@ stall
|
|
LDRB r14,[r14,r1] @ r14 = pcolor = _palette[color]
|
|
@ stall
|
|
@ stall
|
|
CMP r14,#13 @ if (pcolor == 13)
|
|
LDREQ r12,[r13,#_shadow_table]
|
|
LDREQB r14,[r9] @ r14 = *dst
|
|
@ stallEQ
|
|
@ stallEQ
|
|
LDREQB r14,[r12,r14] @ r14 = pcolor=_shadow_tab[r14]
|
|
LDREQ r12,[r13,#pitch]
|
|
@ stallEQ
|
|
STRB r14,[r9] @ *dst = pcolor
|
|
masked:
|
|
ADD r9,r9,r12 @ dst += _out.pitch
|
|
startpos:
|
|
SUBS r5,r5,#1 @ loopCount -=1
|
|
BNE innerloop
|
|
|
|
@ So we either ran out of height or len (or both)
|
|
LDR r12,[r13,#height]
|
|
LDR r14,[r13,#len]
|
|
CMP r12,#0
|
|
BNE notheight
|
|
LDR r10,[r13,#v1_skip_width]
|
|
LDR r11,[r13,#_scaleX]
|
|
LDR r2,[r13,#scaleIdxXPtr]
|
|
LDR r12,[r13,#v1_scaleXstep]
|
|
SUBS r10,r10,#1 @ if --v1.skip_width == 0
|
|
BEQ end @ return _scaleIndexX
|
|
LDRB r9,[r2],r12 @ r2 = scaleIdxXPtr+=sclXstp
|
|
STR r10,[r13,#v1_skip_width]
|
|
CMP r11,#254 @ if _scaleX <= 254
|
|
CMPLE r11,r9 @ && _scaleX <= scltb[scIdxX]
|
|
LDR r9,[r13,#v1_destptr] @ r9 = dst = v1.destptr
|
|
BLE noXstep
|
|
|
|
SUB r11,r7,#1
|
|
ADDS r3,r3,r12 @ v1.x += v1.scaleXstep
|
|
@ if v1.x < 0 ||
|
|
CMPGE r11,r3 @ _out.w-1 < v1.x
|
|
BLT end
|
|
AND r11,r3,#7
|
|
MOV r8,#0x80
|
|
MOV r8,r8,LSR r11 @ maskbit = revBitMask(v1.x & 7)
|
|
ADD r9,r9,r12 @ r10 = v1.destptr += v1.scaleXstep
|
|
STR r9,[r13,#v1_destptr]
|
|
noXstep:
|
|
STR r2,[r13,#scaleIdxXPtr]
|
|
LDR r10,[r13,#v1_mask_ptr]
|
|
LDR r12,[r13,#_height] @ r12= height = _height
|
|
LDR r4,[r13,#v1_y] @ r4 = y = v1.y
|
|
LDR r2,[r13,#scaleIdxYPtr] @ r2 = v1.scaletable[sclIdxY]
|
|
ADD r10,r10,r3,ASR #3 @ mask=v1.mask_ptr+(v1.x>>3)
|
|
notheight:
|
|
CMP r14,#0 @ while (len > 0)
|
|
BGT middleloop
|
|
B outerloop @ while (1)
|
|
end:
|
|
LDR r0,[r13,#v1_scaletable]
|
|
SUB r0,r2,r0
|
|
ADD r13,r13,#space
|
|
LDMFD r13!,{r3-r11,PC}
|