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Fix toArgb32 on NEON

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The color components were not correctly shuffled to ARGB host-order
form.

Discovered and tested with tst_QPainter::blendARGBonRGB on ARM.

Change-Id: I2ef9b6129dd83f3c6be0b30c0a5e3684564e6b2f
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2017-01-03 11:16:30 +01:00
parent 7991a70d28
commit 3d08f308f1
1 changed files with 6 additions and 1 deletions
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7
src/gui/painting/qrgba64_p.h
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@ -214,7 +214,12 @@ inline uint toArgb32(QRgba64 rgba64)
return toArgb32(v);
#elif defined __ARM_NEON__
uint16x4_t v = vreinterpret_u16_u64(vld1_u64(reinterpret_cast<const uint64_t *>(&rgba64)));
v = vext_u16(v, v, 1);
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
const uint8x8_t shuffleMask = { 4, 5, 2, 3, 0, 1, 6, 7 };
v = vreinterpret_u16_u8(vtbl1_u8(vreinterpret_u8_u16(v), shuffleMask));
#else
v = vext_u16(v, v, 3);
#endif
return toArgb32(v);
#else
return rgba64.toArgb32();