1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 12 .globl vp8_block_error_ppc 13 14 .align 2 15 ;# r3 short *Coeff 16 ;# r4 short *dqcoeff 17 vp8_block_error_ppc: 18 mfspr r11, 256 ;# get old VRSAVE 19 oris r12, r11, 0xf800 20 mtspr 256, r12 ;# set VRSAVE 21 22 stwu r1,-32(r1) ;# create space on the stack 23 24 stw r5, 12(r1) ;# tranfer dc to vector register 25 26 lvx v0, 0, r3 ;# Coeff 27 lvx v1, 0, r4 ;# dqcoeff 28 29 li r10, 16 30 31 vspltisw v3, 0 32 33 vsubshs v0, v0, v1 34 35 vmsumshm v2, v0, v0, v3 ;# multiply differences 36 37 lvx v0, r10, r3 ;# Coeff 38 lvx v1, r10, r4 ;# dqcoeff 39 40 vsubshs v0, v0, v1 41 42 vmsumshm v1, v0, v0, v2 ;# multiply differences 43 vsumsws v1, v1, v3 ;# sum up 44 45 stvx v1, 0, r1 46 lwz r3, 12(r1) ;# return value 47 48 addi r1, r1, 32 ;# recover stack 49 mtspr 256, r11 ;# reset old VRSAVE 50 51 blr 52
