Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 297 insertions, 0 deletions

diff --git a/src/gui/painting/qdrawhelper_neon_asm.S b/src/gui/painting/qdrawhelper_neon_asm.S
new file mode 100644
index 0000000000..e8434fc8e7
--- /dev/null
+++ b/src/gui/painting/qdrawhelper_neon_asm.S
@@ -0,0 +1,297 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/* Prevent the stack from becoming executable for no reason... */
+#if defined(__linux__) && defined(__ELF__)
+.section .note.GNU-stack,"",%progbits
+#endif
+
+.text
+.fpu neon
+.arch armv7a
+.altmacro
+
+/* void blend_8_pixels_argb32_on_rgb16_neon(quint16 *dst, const quint32 *src, int const_alpha) */
+
+    .func blend_8_pixels_argb32_on_rgb16_neon
+    .global blend_8_pixels_argb32_on_rgb16_neon
+    /* For ELF format also set function visibility to hidden */
+#ifdef __ELF__
+    .hidden blend_8_pixels_argb32_on_rgb16_neon
+    .type blend_8_pixels_argb32_on_rgb16_neon, %function
+#endif
+blend_8_pixels_argb32_on_rgb16_neon:
+    vld4.8      { d0, d1, d2, d3 }, [r1]
+    vld1.16     { d4, d5 }, [r0]
+
+    cmp         r2, #256
+    beq         .blend_32_inner
+
+    vdup.8      d6, r2
+
+    /* multiply by const_alpha */
+    vmull.u8    q8,   d6, d0
+    vmull.u8    q9,   d6, d1
+    vmull.u8    q10,  d6, d2
+    vmull.u8    q11,  d6, d3
+
+    vshrn.u16   d0,  q8, #8
+    vshrn.u16   d1,  q9, #8
+    vshrn.u16   d2, q10, #8
+    vshrn.u16   d3, q11, #8
+
+.blend_32_inner:
+    /* convert 8 r5g6b5 pixel data from {d4, d5} to planar 8-bit format
+       and put data into d6 - red, d7 - green, d30 - blue */
+    vshrn.u16   d6, q2, #8
+    vshrn.u16   d7, q2, #3
+    vsli.u16    q2, q2, #5
+    vsri.u8     d6, d6, #5
+    vmvn.8      d3, d3
+    vsri.u8     d7, d7, #6
+    vshrn.u16   d30, q2, #2
+
+    pld [r0, #128]
+
+    /* now do alpha blending, storing results in 8-bit planar format
+       into d16 - red, d19 - green, d18 - blue */
+    vmull.u8    q10, d3, d6
+    vmull.u8    q11, d3, d7
+    vmull.u8    q12, d3, d30
+    vrshr.u16   q13, q10, #8
+    vrshr.u16   q3,  q11, #8
+    vrshr.u16   q15, q12, #8
+    vraddhn.u16 d20, q10, q13
+    vraddhn.u16 d23, q11, q3
+    vraddhn.u16 d22, q12, q15
+    vqadd.u8    d16, d2, d20
+    vqadd.u8    q9, q0, q11
+    /* convert the result to r5g6b5 and store it into {d28, d29} */
+    vshll.u8    q14, d16, #8
+    vshll.u8    q8, d19, #8
+    vshll.u8    q9, d18, #8
+    vsri.u16    q14, q8, #5
+    vsri.u16    q14, q9, #11
+
+    vst1.16     { d28, d29 }, [r0]
+
+    bx          lr
+
+    .endfunc
+
+/* void blend_8_pixels_rgb16_on_rgb16_neon(quint16 *dst, const quint16 *src, int const_alpha) */
+
+    .func blend_8_pixels_rgb16_on_rgb16_neon
+    .global blend_8_pixels_rgb16_on_rgb16_neon
+    /* For ELF format also set function visibility to hidden */
+#ifdef __ELF__
+    .hidden blend_8_pixels_rgb16_on_rgb16_neon
+    .type blend_8_pixels_rgb16_on_rgb16_neon, %function
+#endif
+blend_8_pixels_rgb16_on_rgb16_neon:
+    vld1.16     { d0, d1 }, [r0]
+    vld1.16     { d2, d3 }, [r1]
+
+    rsb         r3, r2, #256
+    vdup.8      d4, r2
+    vdup.8      d5, r3
+
+    /* convert 8 r5g6b5 pixel data from {d0, d1} to planar 8-bit format
+       and put data into d6 - red, d7 - green, d30 - blue */
+    vshrn.u16   d6,  q0,  #8
+    vshrn.u16   d7,  q0,  #3
+    vsli.u16    q0,  q0,  #5
+    vsri.u8     d6,  d6,  #5
+    vsri.u8     d7,  d7,  #6
+    vshrn.u16   d30, q0,  #2
+
+    /* same from {d2, d3} into {d26, d27, d28} */
+    vshrn.u16   d26, q1,  #8
+    vshrn.u16   d27, q1,  #3
+    vsli.u16    q1,  q1,  #5
+    vsri.u8     d26, d26, #5
+    vsri.u8     d27, d27, #6
+    vshrn.u16   d28, q1,  #2
+
+    /* multiply dst by inv const_alpha */
+    vmull.u8    q10, d5,  d6
+    vmull.u8    q11, d5,  d7
+    vmull.u8    q12, d5,  d30
+
+    vshrn.u16   d6,  q10, #8
+    vshrn.u16   d7,  q11, #8
+    vshrn.u16   d30, q12, #8
+
+    /* multiply src by const_alpha */
+    vmull.u8    q10,  d4, d26
+    vmull.u8    q11,  d4, d27
+    vmull.u8    q12,  d4, d28
+
+    vshrn.u16   d26, q10, #8
+    vshrn.u16   d27, q11, #8
+    vshrn.u16   d28, q12, #8
+
+    /* preload dst + 128 */
+    pld [r0, #128]
+
+    /* add components, storing results in 8-bit planar format
+       into d16 - red, d19 - green, d18 - blue */
+    vadd.u8     d16, d26, d6
+    vadd.u8     d19, d27, d7
+    vadd.u8     d18, d28, d30
+
+    /* convert the result to r5g6b5 and store it into {d28, d29} */
+    vshll.u8    q14, d16, #8
+    vshll.u8    q8,  d19, #8
+    vshll.u8    q9,  d18, #8
+    vsri.u16    q14,  q8, #5
+    vsri.u16    q14,  q9, #11
+
+    vst1.16     { d28, d29 }, [r0]
+
+    bx          lr
+
+    .endfunc
+
+/* void qt_rotate90_16_neon(quint16 *dst, const quint16 *src, int sstride, int dstride, int count) */
+    .func qt_rotate90_16_neon
+    .global qt_rotate90_16_neon
+    /* For ELF format also set function visibility to hidden */
+#ifdef __ELF__
+    .hidden qt_rotate90_16_neon
+    .type qt_rotate90_16_neon, %function
+#endif
+qt_rotate90_16_neon:
+    push { r4-r11, lr }
+    ldr r5, [sp, #(9*4)]
+
+    /* The preloads are the key to getting good performance */
+    pld [r1]
+
+    mov r4, r5, asr #2
+    add r6, r0, r3
+    add r7, r6, r3
+
+    add r8, r7, r3
+    add r9, r8, r3
+
+    pld [r1, r2]
+
+    add r10, r9, r3
+    add r11, r10, r3
+
+    add r3, r3, r11
+    and r5, r5, #3
+
+    pld [r1, r2, lsl #1]
+
+    cmp r4, #0
+    beq .rotate90_16_tail
+
+.rotate90_16_loop:
+    vld1.16 { q8  }, [r1], r2
+
+    pld [r1, r2, lsl #1]
+
+    vld1.16 { q9  }, [r1], r2
+    vld1.16 { q10 }, [r1], r2
+    vld1.16 { q11 }, [r1], r2
+
+    pld [r1]
+
+    /* Could have used four quad-word zips instead,
+       but those take three cycles as opposed to one. */
+    vzip.16 d16, d20
+    vzip.16 d17, d21
+
+    vzip.16 d18, d22
+
+    pld [r1, r2]
+
+    vzip.16 d19, d23
+
+    vzip.16 d16, d18
+    vzip.16 d17, d19
+
+    pld [r1, r2, lsl #1]
+
+    vzip.16 d20, d22
+    vzip.16 d21, d23
+
+    vst1.16 { d23 }, [r0]!
+    vst1.16 { d21 }, [r6]!
+    vst1.16 { d19 }, [r7]!
+    vst1.16 { d17 }, [r8]!
+    vst1.16 { d22 }, [r9]!
+    vst1.16 { d20 }, [r10]!
+    vst1.16 { d18 }, [r11]!
+    vst1.16 { d16 }, [r3]!
+
+    sub r4, r4, #1
+    cmp r4, #0
+    bne .rotate90_16_loop
+    b .rotate90_16_tail
+
+.rotate90_16_tail_loop:
+    sub r5, r5, #2
+
+    vld1.16 { q8 }, [r1], r2
+    vld1.16 { q9 }, [r1], r2
+
+    vzip.16 d16, d18
+    vzip.16 d17, d19
+
+    vst1.32 { d19[1] }, [r0]!
+    vst1.32 { d19[0] }, [r6]!
+    vst1.32 { d17[1] }, [r7]!
+    vst1.32 { d17[0] }, [r8]!
+    vst1.32 { d18[1] }, [r9]!
+    vst1.32 { d18[0] }, [r10]!
+    vst1.32 { d16[1] }, [r11]!
+    vst1.32 { d16[0] }, [r3]!
+
+.rotate90_16_tail:
+    cmp r5, #0
+    bgt .rotate90_16_tail_loop
+
+    pop { r4-r11, pc }
+
+    .endfunc