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MIPS DSPR2 optimization of routine fetchUntransformedRGB16

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Change-Id: I109deb969009214c4d81677e127f50120443acd2
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
This commit is contained in:
Damir Tatalovic 2012-04-04 17:54:58 +02:00 committed by Qt by Nokia
parent 0e7a52b539
commit 7f3f3a0858
3 changed files with 92 additions and 0 deletions
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4
src/gui/painting/qdrawhelper.cpp
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@ -555,8 +555,12 @@ static const uint *QT_FASTCALL fetchUntransformedRGB16(uint *buffer, const Opera
int length)
{
const quint16 *scanLine = (const quint16 *)data->texture.scanLine(y) + x;
#ifdef QT_HAVE_MIPS_DSPR2
qConvertRgb16To32_asm_mips_dspr2(buffer, scanLine, length);
#else
for (int i = 0; i < length; ++i)
buffer[i] = qConvertRgb16To32(scanLine[i]);
#endif
return buffer;
}

6
src/gui/painting/qdrawhelper_mips_dsp_p.h
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@ -71,6 +71,12 @@ uint * QT_FASTCALL qt_destFetchARGB32_mips_dsp(uint *buffer,
void QT_FASTCALL qt_destStoreARGB32_mips_dsp(QRasterBuffer *rasterBuffer, int x, int y,
const uint *buffer, int length);
#ifdef QT_HAVE_MIPS_DSPR2
extern "C" void qConvertRgb16To32_asm_mips_dspr2(quint32 *dest, const quint16 *src, int length);
#endif // QT_HAVE_MIPS_DSPR2
#endif // QT_HAVE_MIPS_DSP
QT_END_NAMESPACE

82
src/gui/painting/qdrawhelper_mips_dspr2_asm.S
View File

@ -93,3 +93,85 @@ LEAF_MIPS_DSPR2(BYTE_MUL_asm_mips_dspr2)
j ra
END(BYTE_MUL_asm_mips_dspr2)
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)