From 094cbd586ffd16c75e11dd7eb32dbe7f79c21a99 Mon Sep 17 00:00:00 2001 From: Thomas Martitz Date: Sat, 7 Jan 2012 23:22:28 +0100 Subject: Implement a C version lcd-as-memframe.c and move it and the asm to firmware/asm. Change-Id: I20c3af0368202493d54fb776530300a39d47873a --- firmware/target/arm/lcd-as-memframe.S | 692 ---------------------------------- 1 file changed, 692 deletions(-) delete mode 100644 firmware/target/arm/lcd-as-memframe.S (limited to 'firmware/target/arm/lcd-as-memframe.S') diff --git a/firmware/target/arm/lcd-as-memframe.S b/firmware/target/arm/lcd-as-memframe.S deleted file mode 100644 index 52ab0447c2..0000000000 --- a/firmware/target/arm/lcd-as-memframe.S +++ /dev/null @@ -1,692 +0,0 @@ -/*************************************************************************** - * __________ __ ___. - * Open \______ \ ____ ____ | | _\_ |__ _______ ___ - * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / - * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < - * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ - * \/ \/ \/ \/ \/ - * $Id$ - * - * Copyright (C) 2007 by Michael Sevakis - * - * ARM code for memory framebuffer LCDs - * - * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ****************************************************************************/ - -#include "config.h" -#include "cpu.h" - -/**************************************************************************** - * void lcd_copy_buffer_rect(fb_data *dst, fb_data *src, int width, - * int height); - */ - .section .icode.lcd_copy_buffer_rect, "ax", %progbits - .align 2 - .global lcd_copy_buffer_rect - .type lcd_copy_buffer_rect, %function - @ r0 = dst - @ r1 = src - @ r2 = width - @ r3 = height -lcd_copy_buffer_rect: @ - stmfd sp!, { r4-r11, lr } @ save non-scratch regs - mov r5, r2 @ r5 = cached width - rsb r4, r2, #LCD_WIDTH @ r4 = LCD_WIDTH - width -10: @ copy line @ - subs r2, r5, #1 @ r2 = width - 1 - beq 40f @ finish line @ one halfword? skip to trailing copy - tst r0, #2 @ word aligned? - beq 20f @ rem copy @ yes? skip to word copy - ldrh r6, [r1], #2 @ copy leading halfword - subs r2, r2, #1 @ - strh r6, [r0], #2 @ - ble 40f @ finish line @ next line if lt or finish - @ trailing halfword if eq -20: @ rem copy @ - sub r14, r2, #1 @ wrap remaining width mod 16 after word - @ align (rw) - and r14, r14, #0xe @ r14 = 14, 0, 2, 4, 6, 8, 10, 12 - add pc, pc, r14, lsl #3 @ branch to 32-byte align - nop @ - ldr r6, [r1], #4 @ rw % 16 = 2 or 3 (0) - subs r2, r2, #2 @ - str r6, [r0], #4 @ - b 25f @ copy up done @ - ldmia r1!, { r6-r7 } @ rw % 16 = 4 or 5 (2) - subs r2, r2, #4 @ - stmia r0!, { r6-r7 } @ - b 25f @ copy up done @ - ldmia r1!, { r6-r8 } @ rw % 16 = 6 or 7 (4) - subs r2, r2, #6 @ - stmia r0!, { r6-r8 } @ - b 25f @ copy up done @ - ldmia r1!, { r6-r9 } @ rw % 16 = 8 or 9 (6) - subs r2, r2, #8 @ - stmia r0!, { r6-r9 } @ - b 25f @ copy up done @ - ldmia r1!, { r6-r10 } @ rw % 16 = 10 or 11 (8) - subs r2, r2, #10 @ - stmia r0!, { r6-r10 } @ - b 25f @ copy up done @ - ldmia r1!, { r6-r11 } @ rw % 16 = 12 or 13 (10) - subs r2, r2, #12 @ - stmia r0!, { r6-r11 } @ - b 25f @ copy up done @ - ldmia r1!, { r6-r12 } @ rw % 16 = 14 or 15 (12) - subs r2, r2, #14 @ - stmia r0!, { r6-r12 } @ -25: @ copy up done @ - ble 40f @ finish line @ -30: @ octword loop @ rw % 16 = 0 or 1 (14) - ldmia r1!, { r6-r12, r14 } @ copy 16 pixels per loop - subs r2, r2, #16 @ - stmia r0!, { r6-r12, r14 } @ - bgt 30b @ octword loop @ -40: @ finish line @ - ldreqh r6, [r1], #2 @ finish last halfword if eq ... - add r1, r1, r4, lsl #1 @ - streqh r6, [r0], #2 @ ... - add r0, r0, r4, lsl #1 @ - subs r3, r3, #1 @ next line - bgt 10b @ copy line @ - ldmpc regs=r4-r11 @ restore regs and return - .size lcd_copy_buffer_rect, .-lcd_copy_buffer_rect - - -/**************************************************************************** - * void lcd_write_yuv420_lines(fb_data *dst, - * unsigned char const * const src[3], - * int width, - * int stride); - * - * |R| |1.000000 -0.000001 1.402000| |Y'| - * |G| = |1.000000 -0.334136 -0.714136| |Pb| - * |B| |1.000000 1.772000 0.000000| |Pr| - * Scaled, normalized, rounded and tweaked to yield RGB 565: - * |R| |74 0 101| |Y' - 16| >> 9 - * |G| = |74 -24 -51| |Cb - 128| >> 8 - * |B| |74 128 0| |Cr - 128| >> 9 - * - * Write four RGB565 pixels in the following order on each loop: - * 1 3 + > down - * 2 4 \/ left - */ - .section .icode.lcd_write_yuv420_lines, "ax", %progbits - .align 2 - .global lcd_write_yuv420_lines - .type lcd_write_yuv420_lines, %function -lcd_write_yuv420_lines: - @ r0 = dst - @ r1 = yuv_src - @ r2 = width - @ r3 = stride - stmfd sp!, { r4-r10, lr } @ save non-scratch - ldmia r1, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p - @ r5 = yuv_src[1] = Cb_p - @ r6 = yuv_src[2] = Cr_p - @ r1 = scratch - sub r3, r3, #1 @ -10: @ loop line @ - ldrb r7, [r4], #1 @ r7 = *Y'_p++; - ldrb r8, [r5], #1 @ r8 = *Cb_p++; - ldrb r9, [r6], #1 @ r9 = *Cr_p++; - @ - sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 - add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right - add r7, r12, r7, asl #5 @ by one less when adding - same for all - @ - sub r8, r8, #128 @ Cb -= 128 - sub r9, r9, #128 @ Cr -= 128 - @ - add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24 - add r10, r10, r10, asl #4 @ - add r10, r10, r8, asl #3 @ - add r10, r10, r8, asl #4 @ - @ - add lr, r9, r9, asl #2 @ r9 = Cr*101 - add lr, lr, r9, asl #5 @ - add r9, lr, r9, asl #6 @ - @ - add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8 - mov r8, r8, asr #2 @ - add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9 - mov r9, r9, asr #9 @ - rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8 - mov r10, r10, asr #8 @ - @ compute R, G, and B - add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu - add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv - add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv - @ -#if ARM_ARCH >= 6 - usat r1, #5, r1 @ clamp b - usat lr, #5, lr @ clamp r - usat r7, #6, r7 @ clamp g -#else - orr r12, r1, lr @ check if clamping is needed... - orr r12, r12, r7, asr #1 @ ...at all - cmp r12, #31 @ - bls 15f @ no clamp @ - cmp r1, #31 @ clamp b - mvnhi r1, r1, asr #31 @ - andhi r1, r1, #31 @ - cmp lr, #31 @ clamp r - mvnhi lr, lr, asr #31 @ - andhi lr, lr, #31 @ - cmp r7, #63 @ clamp g - mvnhi r7, r7, asr #31 @ - andhi r7, r7, #63 @ -15: @ no clamp @ -#endif - @ - ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride) - @ - orr r1, r1, r7, lsl #5 @ r4 |= (g << 5) - orr r1, r1, lr, lsl #11 @ r4 = b | (r << 11) - -#if LCD_WIDTH >= LCD_HEIGHT - strh r1, [r0] @ -#elif LCD_WIDTH < 256 - strh r1, [r0], #LCD_WIDTH @ store pixel -#else - strh r1, [r0] @ -#endif - @ - sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 - add r12, r7, r7, asl #2 @ - add r7, r12, r7, asl #5 @ - @ compute R, G, and B - add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu - add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv - add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv - @ -#if ARM_ARCH >= 6 - usat r1, #5, r1 @ clamp b - usat lr, #5, lr @ clamp r - usat r7, #6, r7 @ clamp g -#else - orr r12, r1, lr @ check if clamping is needed... - orr r12, r12, r7, asr #1 @ ...at all - cmp r12, #31 @ - bls 15f @ no clamp @ - cmp r1, #31 @ clamp b - mvnhi r1, r1, asr #31 @ - andhi r1, r1, #31 @ - cmp lr, #31 @ clamp r - mvnhi lr, lr, asr #31 @ - andhi lr, lr, #31 @ - cmp r7, #63 @ clamp g - mvnhi r7, r7, asr #31 @ - andhi r7, r7, #63 @ -15: @ no clamp @ -#endif - @ - ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++) - @ - orr r1, r1, lr, lsl #11 @ r1 = b | (r << 11) - orr r1, r1, r7, lsl #5 @ r1 |= (g << 5) - -#if LCD_WIDTH >= LCD_HEIGHT - add r0, r0, #2*LCD_WIDTH @ - strh r1, [r0] @ store pixel - sub r0, r0, #2*LCD_WIDTH @ -#elif LCD_WIDTH < 256 - strh r1, [r0, #-LCD_WIDTH-2] @ store pixel -#else - strh r1, [r0, #-2] @ - add r0, r0, #LCD_WIDTH @ -#endif - @ - sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 - add r12, r7, r7, asl #2 @ - add r7, r12, r7, asl #5 @ - @ compute R, G, and B - add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu - add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv - add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv - @ -#if ARM_ARCH >= 6 - usat r1, #5, r1 @ clamp b - usat lr, #5, lr @ clamp r - usat r7, #6, r7 @ clamp g -#else - orr r12, r1, lr @ check if clamping is needed... - orr r12, r12, r7, asr #1 @ ...at all - cmp r12, #31 @ - bls 15f @ no clamp @ - cmp r1, #31 @ clamp b - mvnhi r1, r1, asr #31 @ - andhi r1, r1, #31 @ - cmp lr, #31 @ clamp r - mvnhi lr, lr, asr #31 @ - andhi lr, lr, #31 @ - cmp r7, #63 @ clamp g - mvnhi r7, r7, asr #31 @ - andhi r7, r7, #63 @ -15: @ no clamp @ -#endif - @ - ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride) - @ - orr r1, r1, r7, lsl #5 @ r1 = b | (g << 5) - orr r1, r1, lr, lsl #11 @ r1 |= (r << 11) - -#if LCD_WIDTH >= LCD_HEIGHT - strh r1, [r0, #2] -#elif LCD_WIDTH < 256 - strh r1, [r0, #LCD_WIDTH]! @ store pixel -#else - strh r1, [r0] @ -#endif - @ - sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 - add r12, r7, r7, asl #2 @ - add r7, r12, r7, asl #5 @ - @ compute R, G, and B - add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu - add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv - add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv - @ -#if ARM_ARCH >= 6 - usat r1, #5, r1 @ clamp b - usat lr, #5, lr @ clamp r - usat r7, #6, r7 @ clamp g -#else - orr r12, r1, lr @ check if clamping is needed... - orr r12, r12, r7, asr #1 @ ...at all - cmp r12, #31 @ - bls 15f @ no clamp @ - cmp r1, #31 @ clamp b - mvnhi r1, r1, asr #31 @ - andhi r1, r1, #31 @ - cmp lr, #31 @ clamp r - mvnhi lr, lr, asr #31 @ - andhi lr, lr, #31 @ - cmp r7, #63 @ clamp g - mvnhi r7, r7, asr #31 @ - andhi r7, r7, #63 @ -15: @ no clamp @ -#endif - @ - orr r12, r1, lr, lsl #11 @ r12 = b | (r << 11) - orr r12, r12, r7, lsl #5 @ r12 |= (g << 5) - -#if LCD_WIDTH >= LCD_HEIGHT - add r0, r0, #2*LCD_WIDTH - strh r12, [r0, #2] -#if LCD_WIDTH <= 512 - sub r0, r0, #(2*LCD_WIDTH)-4 -#else - sub r0, r0, #(2*LCD_WIDTH) - add r0, r0, #4 -#endif -#else - strh r12, [r0, #-2] @ store pixel -#if LCD_WIDTH < 256 - add r0, r0, #2*LCD_WIDTH @ -#else - add r0, r0, #LCD_WIDTH @ -#endif -#endif - @ - subs r2, r2, #2 @ subtract block from width - bgt 10b @ loop line @ - @ - ldmpc regs=r4-r10 @ restore registers and return - .ltorg @ dump constant pool - .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines - - -/**************************************************************************** - * void lcd_write_yuv420_lines_odither(fb_data *dst, - * unsigned char const * const src[3], - * int width, - * int stride, - * int x_screen, - * int y_screen); - * - * |R| |1.000000 -0.000001 1.402000| |Y'| - * |G| = |1.000000 -0.334136 -0.714136| |Pb| - * |B| |1.000000 1.772000 0.000000| |Pr| - * Red scaled at twice g & b but at same precision to place it in correct - * bit position after multiply and leave instruction count lower. - * |R| |258 0 408| |Y' - 16| - * |G| = |149 -49 -104| |Cb - 128| - * |B| |149 258 0| |Cr - 128| - * - * Write four RGB565 pixels in the following order on each loop: - * 1 3 + > down - * 2 4 \/ left - * - * Kernel pattern (raw|rotated|use order): - * 5 3 4 2 2 6 3 7 row0 row2 > down - * 1 7 0 6 | 4 0 5 1 | 2 4 6 0 3 5 7 1 col0 left - * 4 2 5 3 | 3 7 2 6 | 3 5 7 1 2 4 6 0 col2 \/ - * 0 6 1 7 5 1 4 0 - */ - .section .icode.lcd_write_yuv420_lines_odither, "ax", %progbits - .align 2 - .global lcd_write_yuv420_lines_odither - .type lcd_write_yuv420_lines_odither, %function -lcd_write_yuv420_lines_odither: - @ r0 = dst - @ r1 = yuv_src - @ r2 = width - @ r3 = stride - @ [sp] = x_screen - @ [sp+4] = y_screen - stmfd sp!, { r4-r11, lr } @ save non-scratch - ldmia r1, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p - @ r5 = yuv_src[1] = Cb_p - @ r6 = yuv_src[2] = Cr_p - @ - sub r3, r3, #1 @ - add r1, sp, #36 @ Line up pattern and kernel quadrant - ldmia r1, { r12, r14 } @ - eor r14, r14, r12 @ - and r14, r14, #0x2 @ - mov r14, r14, lsl #6 @ 0x00 or 0x80 -10: @ loop line @ - @ - ldrb r7, [r4], #1 @ r7 = *Y'_p++; - ldrb r8, [r5], #1 @ r8 = *Cb_p++; - ldrb r9, [r6], #1 @ r9 = *Cr_p++; - @ - eor r14, r14, #0x80 @ flip pattern quadrant - @ - sub r7, r7, #16 @ r7 = Y = (Y' - 16)*149 - add r12, r7, r7, asl #2 @ - add r12, r12, r12, asl #4 @ - add r7, r12, r7, asl #6 @ - @ - sub r8, r8, #128 @ Cb -= 128 - sub r9, r9, #128 @ Cr -= 128 - @ - add r10, r8, r8, asl #4 @ r10 = guv = Cr*104 + Cb*49 - add r10, r10, r8, asl #5 @ - add r10, r10, r9, asl #3 @ - add r10, r10, r9, asl #5 @ - add r10, r10, r9, asl #6 @ - @ - mov r8, r8, asl #1 @ r8 = bu = Cb*258 - add r8, r8, r8, asl #7 @ - @ - add r9, r9, r9, asl #1 @ r9 = rv = Cr*408 - add r9, r9, r9, asl #4 @ - mov r9, r9, asl #3 @ - @ - @ compute R, G, and B - add r1, r8, r7 @ r1 = b' = Y + bu - add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv - rsb r7, r10, r7 @ r7 = g' = Y + guv - @ - @ r8 = bu, r9 = rv, r10 = guv - @ - sub r12, r1, r1, lsr #5 @ r1 = 31/32*b + b/256 - add r1, r12, r1, lsr #8 @ - @ - sub r12, r11, r11, lsr #5 @ r11 = 31/32*r + r/256 - add r11, r12, r11, lsr #8 @ - @ - sub r12, r7, r7, lsr #6 @ r7 = 63/64*g + g/256 - add r7, r12, r7, lsr #8 @ - @ - add r12, r14, #0x100 @ - @ - add r1, r1, r12 @ b = r1 + delta - add r11, r11, r12, lsl #1 @ r = r11 + delta*2 - add r7, r7, r12, lsr #1 @ g = r7 + delta/2 - @ -#if ARM_ARCH >= 6 - usat r11, #5, r11, asr #11 @ clamp r - usat r7, #6, r7, asr #9 @ clamp g - usat r1, #5, r1, asr #10 @ clamp b - @ - ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride) - @ - orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11) - orr r1, r1, r7, lsl #5 @ r1 |= (g << 5) -#else - orr r12, r1, r11, asr #1 @ check if clamping is needed... - orr r12, r12, r7 @ ...at all - movs r12, r12, asr #15 @ - beq 15f @ no clamp @ - movs r12, r1, asr #15 @ clamp b - mvnne r1, r12, lsr #15 @ - andne r1, r1, #0x7c00 @ mask b only if clamped - movs r12, r11, asr #16 @ clamp r - mvnne r11, r12, lsr #16 @ - movs r12, r7, asr #15 @ clamp g - mvnne r7, r12, lsr #15 @ -15: @ no clamp @ - @ - ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride) - @ - and r11, r11, #0xf800 @ pack pixel - and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) | - orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | - orr r1, r11, r1, lsr #10 @ (b >> 10) -#endif - @ -#if LCD_WIDTH >= LCD_HEIGHT - strh r1, [r0] @ -#elif LCD_WIDTH < 256 - strh r1, [r0], #LCD_WIDTH @ store pixel -#else - strh r1, [r0] @ -#endif - @ - sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 - add r12, r7, r7, asl #2 @ - add r12, r12, r12, asl #4 @ - add r7, r12, r7, asl #6 @ - @ compute R, G, and B - add r1, r8, r7 @ r1 = b' = Y + bu - add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv - rsb r7, r10, r7 @ r7 = g' = Y + guv - @ - sub r12, r1, r1, lsr #5 @ r1 = 31/32*b' + b'/256 - add r1, r12, r1, lsr #8 @ - @ - sub r12, r11, r11, lsr #5 @ r11 = 31/32*r' + r'/256 - add r11, r12, r11, lsr #8 @ - @ - sub r12, r7, r7, lsr #6 @ r7 = 63/64*g' + g'/256 - add r7, r12, r7, lsr #8 @ - @ - add r12, r14, #0x200 @ - @ - add r1, r1, r12 @ b = r1 + delta - add r11, r11, r12, lsl #1 @ r = r11 + delta*2 - add r7, r7, r12, lsr #1 @ g = r7 + delta/2 - @ -#if ARM_ARCH >= 6 - usat r11, #5, r11, asr #11 @ clamp r - usat r7, #6, r7, asr #9 @ clamp g - usat r1, #5, r1, asr #10 @ clamp b - @ - ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++) - @ - orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11) - orr r1, r1, r7, lsl #5 @ r1 |= (g << 5) -#else - orr r12, r1, r11, asr #1 @ check if clamping is needed... - orr r12, r12, r7 @ ...at all - movs r12, r12, asr #15 @ - beq 15f @ no clamp @ - movs r12, r1, asr #15 @ clamp b - mvnne r1, r12, lsr #15 @ - andne r1, r1, #0x7c00 @ mask b only if clamped - movs r12, r11, asr #16 @ clamp r - mvnne r11, r12, lsr #16 @ - movs r12, r7, asr #15 @ clamp g - mvnne r7, r12, lsr #15 @ -15: @ no clamp @ - @ - ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++) - @ - and r11, r11, #0xf800 @ pack pixel - and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) | - orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | - orr r1, r11, r1, lsr #10 @ (b >> 10) -#endif - @ -#if LCD_WIDTH >= LCD_HEIGHT - add r0, r0, #2*LCD_WIDTH @ - strh r1, [r0] @ store pixel - sub r0, r0, #2*LCD_WIDTH @ -#elif LCD_WIDTH < 256 - strh r1, [r0, #-LCD_WIDTH-2] @ store pixel -#else - strh r1, [r0, #-2] @ store pixel - add r0, r0, #LCD_WIDTH @ -#endif - @ - sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 - add r12, r7, r7, asl #2 @ - add r12, r12, r12, asl #4 @ - add r7, r12, r7, asl #6 @ - @ compute R, G, and B - add r1, r8, r7 @ r1 = b' = Y + bu - add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv - rsb r7, r10, r7 @ r7 = g' = Y + guv - @ - @ r8 = bu, r9 = rv, r10 = guv - @ - sub r12, r1, r1, lsr #5 @ r1 = 31/32*b' + b'/256 - add r1, r12, r1, lsr #8 @ - @ - sub r12, r11, r11, lsr #5 @ r11 = 31/32*r' + r'/256 - add r11, r12, r11, lsr #8 @ - @ - sub r12, r7, r7, lsr #6 @ r7 = 63/64*g' + g'/256 - add r7, r12, r7, lsr #8 @ - @ - add r12, r14, #0x300 @ - @ - add r1, r1, r12 @ b = r1 + delta - add r11, r11, r12, lsl #1 @ r = r11 + delta*2 - add r7, r7, r12, lsr #1 @ g = r7 + delta/2 - @ -#if ARM_ARCH >= 6 - usat r11, #5, r11, asr #11 @ clamp r - usat r7, #6, r7, asr #9 @ clamp g - usat r1, #5, r1, asr #10 @ clamp b - @ - ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride) - @ - orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11) - orr r1, r1, r7, lsl #5 @ r1 |= (g << 5) -#else - orr r12, r1, r11, asr #1 @ check if clamping is needed... - orr r12, r12, r7 @ ...at all - movs r12, r12, asr #15 @ - beq 15f @ no clamp @ - movs r12, r1, asr #15 @ clamp b - mvnne r1, r12, lsr #15 @ - andne r1, r1, #0x7c00 @ mask b only if clamped - movs r12, r11, asr #16 @ clamp r - mvnne r11, r12, lsr #16 @ - movs r12, r7, asr #15 @ clamp g - mvnne r7, r12, lsr #15 @ -15: @ no clamp @ - @ - ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride) - @ - and r11, r11, #0xf800 @ pack pixel - and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) | - orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | - orr r1, r11, r1, lsr #10 @ (b >> 10) -#endif - @ -#if LCD_WIDTH >= LCD_HEIGHT - strh r1, [r0, #2] -#elif LCD_WIDTH < 256 - strh r1, [r0, #LCD_WIDTH]! @ store pixel -#else - strh r1, [r0] @ -#endif - - sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 - add r12, r7, r7, asl #2 @ - add r12, r12, r12, asl #4 @ - add r7, r12, r7, asl #6 @ - @ compute R, G, and B - add r1, r8, r7 @ r1 = b' = Y + bu - add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv - rsb r7, r10, r7 @ r7 = g' = Y + guv - @ - sub r12, r1, r1, lsr #5 @ r1 = 31/32*b + b/256 - add r1, r12, r1, lsr #8 @ - @ - sub r12, r11, r11, lsr #5 @ r11 = 31/32*r + r/256 - add r11, r12, r11, lsr #8 @ - @ - sub r12, r7, r7, lsr #6 @ r7 = 63/64*g + g/256 - add r7, r12, r7, lsr #8 @ - @ - @ This element is zero - use r14 @ - @ - add r1, r1, r14 @ b = r1 + delta - add r11, r11, r14, lsl #1 @ r = r11 + delta*2 - add r7, r7, r14, lsr #1 @ g = r7 + delta/2 - @ -#if ARM_ARCH >= 6 - usat r11, #5, r11, asr #11 @ clamp r - usat r7, #6, r7, asr #9 @ clamp g - usat r1, #5, r1, asr #10 @ clamp b - @ - orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11) - orr r1, r1, r7, lsl #5 @ r1 |= (g << 5) -#else - orr r12, r1, r11, asr #1 @ check if clamping is needed... - orr r12, r12, r7 @ ...at all - movs r12, r12, asr #15 @ - beq 15f @ no clamp @ - movs r12, r1, asr #15 @ clamp b - mvnne r1, r12, lsr #15 @ - andne r1, r1, #0x7c00 @ mask b only if clamped - movs r12, r11, asr #16 @ clamp r - mvnne r11, r12, lsr #16 @ - movs r12, r7, asr #15 @ clamp g - mvnne r7, r12, lsr #15 @ -15: @ no clamp @ - @ - and r11, r11, #0xf800 @ pack pixel - and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) | - orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | - orr r1, r11, r1, lsr #10 @ (b >> 10) -#endif - @ -#if LCD_WIDTH >= LCD_HEIGHT - add r0, r0, #2*LCD_WIDTH - strh r1, [r0, #2] @ store pixel -#if LCD_WIDTH <= 512 - sub r0, r0, #(2*LCD_WIDTH)-4 -#else - sub r0, r0, #(2*LCD_WIDTH) - add r0, r0, #4 -#endif -#else - strh r1, [r0, #-2] @ store pixel -#if LCD_WIDTH < 256 - add r0, r0, #2*LCD_WIDTH @ -#else - add r0, r0, #LCD_WIDTH @ -#endif -#endif - @ - subs r2, r2, #2 @ subtract block from width - bgt 10b @ loop line @ - @ - ldmpc regs=r4-r11 @ restore registers and return - .ltorg @ dump constant pool - .size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither -- cgit v1.2.3