diff options
Diffstat (limited to 'graphics/scaler')
| -rwxr-xr-x | graphics/scaler/Normal2xARM.s | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/graphics/scaler/Normal2xARM.s b/graphics/scaler/Normal2xARM.s new file mode 100755 index 0000000000..5de50d9c17 --- /dev/null +++ b/graphics/scaler/Normal2xARM.s @@ -0,0 +1,171 @@ +@ ScummVM Scumm Interpreter +@ Copyright (C) 2009 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. +@ +@ $URL$ +@ $Id$ +@ +@ @author Robin Watts (robin@wss.co.uk) + + .text + + .global Normal2xARM + .global Normal2xAspectMask + + + @ Assumes dst is aligned (so did the C) + @ Assumes 16bit (so did the C) +Normal2xARM: + @ r0 = src + @ r1 = srcPitch + @ r2 = dst + @ r3 = dstPitch + @ r4 = w + @ r5 = h + STMFD r13!,{r4-r11,r14} + LDR r4, [r13,#4*9] @ r4 = w + LDR r5, [r13,#4*10] @ r5 = h + ADD r12,r2, r3 + SUB r1, r1, r4, LSL #1 + SUB r6, r3, r4, LSL #2 + ADD r3, r3, r6 +yloop: + SUBS r14,r4, #4 + BLT thin +xloop: + LDRH r6, [r0], #2 + LDRH r7, [r0], #2 + LDRH r8, [r0], #2 + LDRH r9, [r0], #2 + ORR r6, r6, r6, LSL #16 + ORR r7, r7, r7, LSL #16 + ORR r8, r8, r8, LSL #16 + ORR r9, r9, r9, LSL #16 + STMIA r2!, {r6-r9} + STMIA r12!,{r6-r9} + SUBS r14,r14,#4 + BGE xloop + ADDS r14,r14,#4 + BNE thin + ADD r0, r0, r1 + ADD r2, r2, r3 + ADD r12,r12,r3 + SUBS r5, r5, #1 + BGT yloop + + LDMFD r13!,{r4-r11,PC} +thin: + LDRH r6, [r0], #2 + ORR r6, r6, r6, LSL #16 + STR r6, [r2], #4 + STR r6, [r12],#4 + SUBS r14,r14,#1 + BGT thin + ADD r0, r0, r1 + ADD r2, r2, r3 + ADD r12,r12,r3 + SUBS r5, r5, #1 + BGT yloop + + LDMFD r13!,{r4-r11,PC} + + + @ Horrid filter calculations + @ AAAAAAAAAAAABBBBBBBBBBBBCCCCCCCCCCCCDDDDDDDDDDDDEEEEEEEEEEEE + @ <-+-><-+-><-+-><-+-><-+-><-+-><-+-><-+-><-+-><-+-><-+-><-+-> + @ Ideal: A,A,(A*2+B*3)/5,B,(B*4+C)/5,C,C,(C+D*4)/5,D,(D*3+E*2)/5,E,E + @ Actual: A,A,(A*3+B*5)/8,B,(B*7+C)/8,C,C,(C+D*7)/8,D,(D*5+E*3)/8,E,E + + @ Assumes dst is aligned (so did the C) + @ Assumes 16bit (so did the C) +Normal2xAspectMask: + @ r0 = src + @ r1 = srcPitch + @ r2 = dst + @ r3 = dstPitch + @ r4 = w + @ r5 = h + @ r12= mask + STMFD r13!,{r4-r11,r14} + LDR r4, [r13,#4*9] @ r4 = w + LDR r5, [r13,#4*10] @ r5 = h + LDR r12,[r13,#4*11] @ r12= mask + MOV r11,#2 + SUB r11,r11,r1, LSL #2 @ r11= 2-srcPitch*4 + MOV r14,#4 + SUB r14,r14,r3, LSL #3 + SUB r14,r14,r3, LSL #1 + SUB r14,r14,r3 @ r14 = 4-dstPitch*11 +yloop_aspect: +xloop_aspect: + LDRH r6, [r0], r1 @ r6 = A + LDRH r7, [r0], r1 @ r7 = B + LDRH r8, [r0], r1 @ r8 = C + LDRH r9, [r0], r1 @ r9 = D + LDRH r10,[r0], r11 @ r10= E + ORR r6, r6, r6, LSL #16 @ r6 = output 0, 1 + ORR r7, r7, r7, LSL #16 @ r7 = output 3 + ORR r8, r8, r8, LSL #16 @ r8 = output 5,6 + ORR r9, r9, r9, LSL #16 @ r9 = output 8 + ORR r10,r10,r10,LSL #16 @ r10= output 10, 11 + STR r6, [r2], r3 @ output 0 (A) + STR r6, [r2], r3 @ output 1 (A) + AND r6, r6, r12 @ r6 = A split + ADD r6, r6, r6, LSL #1 @ r6 = A*3 + STR r7, [r2, r3] @ output 3 (B) + AND r7, r7, r12 @ r7 = B split + ADD r6, r6, r7 @ r6 = A*3 + B + ADD r6, r6, r7, LSL #2 @ r6 = A*3 + B*5 + AND r6, r12,r6, LSR #3 @ r6 = (A*3 + B*5)>>3 + ORR r6, r6, r6, ROR #16 @ r6 = output 2 + STR r6, [r2], r3, LSL #1 @ output 2 (A*3+B*5)>>3 + RSB r7, r7, r7, LSL #3 @ r7 = B*7 + AND r6, r8, r12 @ r6 = C split + ADD r7, r7, r6 @ r7 = B*7+C + AND r7, r12,r7, LSR #3 @ r7 = (B*7 + C)>>3 + ORR r7, r7, r7, ROR #16 @ r7 = output 4 + STR r7, [r2], r3 @ output 4 (B*7+C)>>3 + STR r8, [r2], r3 @ output 5 (C) + STR r8, [r2], r3 @ output 6 (C) + STR r9, [r2, r3] @ output 8 (D) + AND r9, r9, r12 @ r9 = D split + RSB r7, r9, r9, LSL #3 @ r7 = D*7 + ADD r6, r6, r7 @ r6 = C+D*7 + AND r6, r12,r6, LSR #3 @ r6 = (C + D*7)>>3 + ORR r6, r6, r6, ROR #16 @ r6 = output 7 + STR r6, [r2], r3, LSL #1 @ output 7 (C+D*7)>>3 + ADD r9, r9, r9, LSL #2 @ r9 = D*5 + AND r6, r10,r12 @ r6 = E split + ADD r9, r9, r6 @ r9 = D*5+E + ADD r9, r9, r6, LSL #1 @ r9 = D*5+E*3 + AND r9, r12,r9, LSR #3 @ r9 = (D*5 + E*3)>>3 + ORR r9, r9, r9, ROR #16 @ r9 = output 9 + STR r9, [r2], r3 @ output 9 (D*5+E*3)>>3 + STR r10,[r2], r3 @ output 10 (E) + STR r10,[r2], r14 @ output 11 (E) + SUBS r4, r4, #1 + BGT xloop_aspect + LDR r4, [r13,#4*9] @ r4 = w + ADD r0, r0, r1, LSL #2 + ADD r0, r0, r1 + SUB r0, r0, r4, LSL #1 + ADD r2, r2, r3, LSL #3 + ADD r2, r2, r3, LSL #2 + SUB r2, r2, r4, LSL #2 + SUBS r5, r5, #5 + BGT yloop_aspect + + LDMFD r13!,{r4-r11,PC} |