libvpx: Pull from upstream

source/libvpx/vp8/common/ppc/idctllm_altivec.asm

-;
-;  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
-;
-;  Use of this source code is governed by a BSD-style license
-;  that can be found in the LICENSE file in the root of the source
-;  tree. An additional intellectual property rights grant can be found
-;  in the file PATENTS.  All contributing project authors may
-;  be found in the AUTHORS file in the root of the source tree.
-;
-
-
-    .globl short_idct4x4llm_ppc
-
-.macro load_c V, LABEL, OFF, R0, R1
-    lis     \R0, \LABEL@ha
-    la      \R1, \LABEL@l(\R0)
-    lvx     \V, \OFF, \R1
-.endm
-
-;# r3 short *input
-;# r4 short *output
-;# r5 int pitch
-    .align 2
-short_idct4x4llm_ppc:
-    mfspr   r11, 256            ;# get old VRSAVE
-    oris    r12, r11, 0xfff8
-    mtspr   256, r12            ;# set VRSAVE
-
-    load_c v8, sinpi8sqrt2, 0, r9, r10
-    load_c v9, cospi8sqrt2minus1, 0, r9, r10
-    load_c v10, hi_hi, 0, r9, r10
-    load_c v11, lo_lo, 0, r9, r10
-    load_c v12, shift_16, 0, r9, r10
-
-    li      r10,  16
-    lvx     v0,   0, r3         ;# input ip[0], ip[ 4]
-    lvx     v1, r10, r3         ;# input ip[8], ip[12]
-
-    ;# first pass
-    vupkhsh v2, v0
-    vupkhsh v3, v1
-    vaddsws v6, v2, v3          ;# a1 = ip[0]+ip[8]
-    vsubsws v7, v2, v3          ;# b1 = ip[0]-ip[8]
-
-    vupklsh v0, v0
-    vmulosh v4, v0, v8
-    vsraw   v4, v4, v12
-    vaddsws v4, v4, v0          ;# ip[ 4] * sin(pi/8) * sqrt(2)
-
-    vupklsh v1, v1
-    vmulosh v5, v1, v9
-    vsraw   v5, v5, v12         ;# ip[12] * cos(pi/8) * sqrt(2)
-    vaddsws v5, v5, v1
-
-    vsubsws v4, v4, v5          ;# c1
-
-    vmulosh v3, v1, v8
-    vsraw   v3, v3, v12
-    vaddsws v3, v3, v1          ;# ip[12] * sin(pi/8) * sqrt(2)
-
-    vmulosh v5, v0, v9
-    vsraw   v5, v5, v12         ;# ip[ 4] * cos(pi/8) * sqrt(2)
-    vaddsws v5, v5, v0
-
-    vaddsws v3, v3, v5          ;# d1
-
-    vaddsws v0, v6, v3          ;# a1 + d1
-    vsubsws v3, v6, v3          ;# a1 - d1
-
-    vaddsws v1, v7, v4          ;# b1 + c1
-    vsubsws v2, v7, v4          ;# b1 - c1
-
-    ;# transpose input
-    vmrghw  v4, v0, v1          ;# a0 b0 a1 b1
-    vmrghw  v5, v2, v3          ;# c0 d0 c1 d1
-
-    vmrglw  v6, v0, v1          ;# a2 b2 a3 b3
-    vmrglw  v7, v2, v3          ;# c2 d2 c3 d3
-
-    vperm   v0, v4, v5, v10     ;# a0 b0 c0 d0
-    vperm   v1, v4, v5, v11     ;# a1 b1 c1 d1
-
-    vperm   v2, v6, v7, v10     ;# a2 b2 c2 d2
-    vperm   v3, v6, v7, v11     ;# a3 b3 c3 d3
-
-    ;# second pass
-    vaddsws v6, v0, v2          ;# a1 = ip[0]+ip[8]
-    vsubsws v7, v0, v2          ;# b1 = ip[0]-ip[8]
-
-    vmulosh v4, v1, v8
-    vsraw   v4, v4, v12
-    vaddsws v4, v4, v1          ;# ip[ 4] * sin(pi/8) * sqrt(2)
-
-    vmulosh v5, v3, v9
-    vsraw   v5, v5, v12         ;# ip[12] * cos(pi/8) * sqrt(2)
-    vaddsws v5, v5, v3
-
-    vsubsws v4, v4, v5          ;# c1
-
-    vmulosh v2, v3, v8
-    vsraw   v2, v2, v12
-    vaddsws v2, v2, v3          ;# ip[12] * sin(pi/8) * sqrt(2)
-
-    vmulosh v5, v1, v9
-    vsraw   v5, v5, v12         ;# ip[ 4] * cos(pi/8) * sqrt(2)
-    vaddsws v5, v5, v1
-
-    vaddsws v3, v2, v5          ;# d1
-
-    vaddsws v0, v6, v3          ;# a1 + d1
-    vsubsws v3, v6, v3          ;# a1 - d1
-
-    vaddsws v1, v7, v4          ;# b1 + c1
-    vsubsws v2, v7, v4          ;# b1 - c1
-
-    vspltish v6, 4
-    vspltish v7, 3
-
-    vpkswss v0, v0, v1
-    vpkswss v1, v2, v3
-
-    vaddshs v0, v0, v6
-    vaddshs v1, v1, v6
-
-    vsrah   v0, v0, v7
-    vsrah   v1, v1, v7
-
-    ;# transpose output
-    vmrghh  v2, v0, v1          ;# a0 c0 a1 c1 a2 c2 a3 c3
-    vmrglh  v3, v0, v1          ;# b0 d0 b1 d1 b2 d2 b3 d3
-
-    vmrghh  v0, v2, v3          ;# a0 b0 c0 d0 a1 b1 c1 d1
-    vmrglh  v1, v2, v3          ;# a2 b2 c2 d2 a3 b3 c3 d3
-
-    stwu    r1,-416(r1)         ;# create space on the stack
-
-    stvx    v0,  0, r1
-    lwz     r6, 0(r1)
-    stw     r6, 0(r4)
-    lwz     r6, 4(r1)
-    stw     r6, 4(r4)
-
-    add     r4, r4, r5
-
-    lwz     r6,  8(r1)
-    stw     r6,  0(r4)
-    lwz     r6, 12(r1)
-    stw     r6,  4(r4)
-
-    add     r4, r4, r5
-
-    stvx    v1,  0, r1
-    lwz     r6, 0(r1)
-    stw     r6, 0(r4)
-    lwz     r6, 4(r1)
-    stw     r6, 4(r4)
-
-    add     r4, r4, r5
-
-    lwz     r6,  8(r1)
-    stw     r6,  0(r4)
-    lwz     r6, 12(r1)
-    stw     r6,  4(r4)
-
-    addi    r1, r1, 416         ;# recover stack
-
-    mtspr   256, r11            ;# reset old VRSAVE
-
-    blr
-
-    .align 4
-sinpi8sqrt2:
-    .short  35468, 35468, 35468, 35468, 35468, 35468, 35468, 35468
-
-    .align 4
-cospi8sqrt2minus1:
-    .short  20091, 20091, 20091, 20091, 20091, 20091, 20091, 20091
-
-    .align 4
-shift_16:
-    .long      16,    16,    16,    16
-
-    .align 4
-hi_hi:
-    .byte     0,  1,  2,  3,  4,  5,  6,  7, 16, 17, 18, 19, 20, 21, 22, 23
-
-    .align 4
-lo_lo:
-    .byte     8,  9, 10, 11, 12, 13, 14, 15, 24, 25, 26, 27, 28, 29, 30, 31