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Diffstat (limited to 'backends/platform/iphone/blit_arm.s')
| -rw-r--r-- | backends/platform/iphone/blit_arm.s | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/backends/platform/iphone/blit_arm.s b/backends/platform/iphone/blit_arm.s new file mode 100644 index 0000000000..ae31fdcce4 --- /dev/null +++ b/backends/platform/iphone/blit_arm.s @@ -0,0 +1,140 @@ +@ ScummVM - Graphic Adventure Engine +@ +@ ScummVM is the legal property of its developers, whose names +@ are too numerous to list here. Please refer to the COPYRIGHT +@ file distributed with this source distribution. +@ +@ 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 _blitLandscapeScreenRect16bpp + .global _blitLandscapeScreenRect8bpp + + +_blitLandscapeScreenRect16bpp: + @ r0 = dst + @ r1 = src + @ r2 = w + @ r3 = h + @ <> = _screenWidth + @ <> = _screenHeight + MOV r12,r13 + STMFD r13!,{r4-r11,r14} + LDMFD r12,{r12,r14} @ r12 = _screenWidth + @ r14 = _screenHeight + ADD r14,r14,r3 @ r14 = _screenHeight + h + MVN r11,#0 + MLA r11,r3,r12,r11 @ r11= _screenWidth*h-1 + ADD r12,r12,r12 +xloop: + SUBS r4,r3,#5 @ r4 = y = h + BLE thin +yloop: + LDRH r5, [r1],r12 @ r5 = *src src += _screenWidth + LDRH r6, [r1],r12 @ r6 = *src src += _screenWidth + LDRH r7, [r1],r12 @ r7 = *src src += _screenWidth + LDRH r8, [r1],r12 @ r8 = *src src += _screenWidth + LDRH r9, [r1],r12 @ r9 = *src src += _screenWidth + LDRH r10,[r1],r12 @ r10= *src src += _screenWidth + SUBS r4,r4,#6 + STRH r5, [r0],#2 @ *dst++ = r5 + STRH r6, [r0],#2 @ *dst++ = r6 + STRH r7, [r0],#2 @ *dst++ = r7 + STRH r8, [r0],#2 @ *dst++ = r8 + STRH r9, [r0],#2 @ *dst++ = r9 + STRH r10,[r0],#2 @ *dst++ = r10 + BGT yloop +thin: + ADDS r4,r4,#5 + BEQ lineend +thin_loop: + LDRH r5,[r1],r12 @ r5 = *src src += _screenWidth + SUBS r4,r4,#1 + STRH r5,[r0],#2 @ *dst++ = r5 + BGT thin_loop +lineend: + SUB r0,r0,r14,LSL #1 @ dst -= _screenHeight + h + SUB r1,r1,r11,LSL #1 @ src += 1-_screenWidth*h + SUBS r2,r2,#1 + BGT xloop + + LDMFD r13!,{r4-r11,PC} + +_blitLandscapeScreenRect8bpp: + @ r0 = dst + @ r1 = src + @ r2 = w + @ r3 = h + @ <> = _palette + @ <> = _screenWidth + @ <> = _screenHeight + MOV r12,r13 + STMFD r13!,{r4-r11,r14} + LDMFD r12,{r11,r12,r14} @ r11 = _palette + @ r12 = _screenWidth + @ r14 = _screenHeight + ADD r14,r14,r3 @ r14 = _screenHeight + h + MVN r6,#0 + MLA r6,r3,r12,r6 @ r6 = _screenWidth*h-1 +xloop8: + MOV r4,r3 @ r4 = y = h + SUBS r4,r3,#4 @ r4 = y = h + BLE thin8 +yloop8: + LDRB r5, [r1],r12 @ r5 = *src src += _screenWidth + LDRB r7, [r1],r12 @ r7 = *src src += _screenWidth + LDRB r8, [r1],r12 @ r8 = *src src += _screenWidth + LDRB r9, [r1],r12 @ r9 = *src src += _screenWidth + LDRB r10,[r1],r12 @ r10= *src src += _screenWidth + ADD r5, r5, r5 + ADD r7, r7, r7 + ADD r8, r8, r8 + ADD r9, r9, r9 + ADD r10,r10,r10 + LDRH r5, [r11,r5] + LDRH r7, [r11,r7] + LDRH r8, [r11,r8] + LDRH r9, [r11,r9] + LDRH r10,[r11,r10] + SUBS r4,r4,#5 + STRH r5, [r0],#2 @ *dst++ = r5 + STRH r7, [r0],#2 @ *dst++ = r7 + STRH r8, [r0],#2 @ *dst++ = r8 + STRH r9, [r0],#2 @ *dst++ = r9 + STRH r10,[r0],#2 @ *dst++ = r10 + BGT yloop8 +thin8: + ADDS r4,r4,#4 + BEQ lineend8 +thin_loop8: + LDRB r5,[r1],r12 @ r5 = *src src += _screenWidth + ADD r5,r5,r5 + LDRH r5,[r11,r5] + SUBS r4,r4,#1 + STRH r5,[r0],#2 @ *dst++ = r5 + BGT thin_loop8 +lineend8: + SUB r0,r0,r14,LSL #1 @ dst -= _screenHeight + h + SUB r1,r1,r6 @ src += 1-_screenWidth*h + SUBS r2,r2,#1 + BGT xloop8 + + LDMFD r13!,{r4-r11,PC} |