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/****************************************************************************
**
** Copyright (C) 2012 MIPS Technologies, www.mips.com, author Damir Tatalovic <dtatalovic@mips.com>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qt_mips_asm_dsp_p.h"
LEAF_MIPS_DSPR2(qConvertRgb16To32_asm_mips_dspr2)
/*
* a0 - dst (a8r8g8b8)
* a1 - src (r5g6b5)
* a2 - w
*/
beqz a2, 3f
nop
addiu t1, a2, -1
beqz t1, 2f
nop
li t4, 0x07e007e0
li t5, 0x001F001F
/* Convert two pixels at time (2 x rgb565 -> 2 x rgb8888) */
1:
lhu t0, 0(a1)
lhu t1, 2(a1)
addiu a1, a1, 4
addiu a2, a2, -2
sll t6, t0, 16
or t6, t6, t1 /* t6 = R1 G1 B1 | R2 G2 B2 */
lui t3, 0xff00
ori t3, t3, 0xff00 /* t3 = FF 00 | FF 00 (in place) */
shrl.ph t7, t6, 11 /* t7 = 0 R1 | 0 R2 */
and t8, t6, t4 /* t8 = 0 G1 0 | 0 G2 0 */
shra.ph t9, t7, 2 /* t9 = 0 R1 | 0 R2 (lower) */
shll.ph t7, t7, 3 /* t7 = 0 R1 | 0 R2 (higher) */
shll.ph t8, t8, 5 /* t8 = G1 0 | G2 0 (higher) */
or t7, t7, t9 /* t7 = 0 R1 | 0 R2 (in place) */
shrl.qb t9, t8, 6 /* t9 = G1 0 | G2 0 (lower) */
or t3, t3, t7 /* t3 = FF R1 | FF R2 (in place) */
or t8, t8, t9 /* t8 = G1 0 | G2 0 (in place) */
and t6, t6, t5 /* t6 = 0 B1 | 0 B2 */
shll.ph t7, t6, 3 /* t7 = 0 B1 | 0 B2 (higher) */
shra.ph t9, t6, 2 /* t9 = 0 B1 | 0 B2 (lower) */
or t7, t7, t9 /* t7 = 0 B1 | 0 B2 (in place) */
or t8, t7, t8 /* t8 = G1 B1 | G2 B2 (in place) */
precrq.ph.w t2, t3, t8 /* t2 = FF R1 G1 B1 (in place) */
precr_sra.ph.w t3, t8, 0 /* t3 = FF R2 G2 B2 (in place) */
sw t2, 0(a0)
sw t3, 4(a0)
addiu t2, a2, -1
bgtz t2, 1b
addiu a0, a0, 8
2:
beqz a2, 3f
nop
lhu t0, 0(a1)
/* Remaining pixel conversion (rgb565 -> rgb8888) */
lui t1, 0xff00
sll t2, t0, 0x3
andi t3, t2, 0xff
ext t2, t0, 0x2, 0x3
or t2, t3, t2
or t1, t1, t2
sll t2, t0, 0x5
andi t2, t2, 0xfc00
srl t3, t0, 0x1
andi t3, t3, 0x300
or t3, t2, t3
or t1, t1, t3
andi t2, t0, 0xf800
srl t3, t2, 0x5
andi t3, t3, 0xff00
or t2, t2, t3
sll t2, t2, 0x8
or t1, t1, t2
sw t1, 0(a0)
3:
j ra
nop
END(qConvertRgb16To32_asm_mips_dspr2)
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