libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/x86/vp9_quantize_mmx.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.
+;
+
+
+%include "vpx_ports/x86_abi_support.asm"
+
+;int vp9_fast_quantize_b_impl_mmx(short *coeff_ptr, short *zbin_ptr,
+;                           short *qcoeff_ptr,short *dequant_ptr,
+;                           short *scan_mask, short *round_ptr,
+;                           short *quant_ptr, short *dqcoeff_ptr);
+global sym(vp9_fast_quantize_b_impl_mmx)
+sym(vp9_fast_quantize_b_impl_mmx):
+    push        rbp
+    mov         rbp, rsp
+    SHADOW_ARGS_TO_STACK 8
+    push rsi
+    push rdi
+    ; end prolog
+
+
+        mov             rsi,        arg(0) ;coeff_ptr
+        movq            mm0,        [rsi]
+
+        mov             rax,        arg(1) ;zbin_ptr
+        movq            mm1,        [rax]
+
+        movq            mm3,        mm0
+        psraw           mm0,        15
+
+        pxor            mm3,        mm0
+        psubw           mm3,        mm0         ; abs
+
+        movq            mm2,        mm3
+        pcmpgtw         mm1,        mm2
+
+        pandn           mm1,        mm2
+        movq            mm3,        mm1
+
+        mov             rdx,        arg(6) ;quant_ptr
+        movq            mm1,        [rdx]
+
+        mov             rcx,        arg(5) ;round_ptr
+        movq            mm2,        [rcx]
+
+        paddw           mm3,        mm2
+        pmulhuw         mm3,        mm1
+
+        pxor            mm3,        mm0
+        psubw           mm3,        mm0     ;gain the sign back
+
+        mov             rdi,        arg(2) ;qcoeff_ptr
+        movq            mm0,        mm3
+
+        movq            [rdi],      mm3
+
+        mov             rax,        arg(3) ;dequant_ptr
+        movq            mm2,        [rax]
+
+        pmullw          mm3,        mm2
+        mov             rax,        arg(7) ;dqcoeff_ptr
+
+        movq            [rax],      mm3
+
+        ; next 8
+        movq            mm4,        [rsi+8]
+
+        mov             rax,        arg(1) ;zbin_ptr
+        movq            mm5,        [rax+8]
+
+        movq            mm7,        mm4
+        psraw           mm4,        15
+
+        pxor            mm7,        mm4
+        psubw           mm7,        mm4         ; abs
+
+        movq            mm6,        mm7
+        pcmpgtw         mm5,        mm6
+
+        pandn           mm5,        mm6
+        movq            mm7,        mm5
+
+        movq            mm5,        [rdx+8]
+        movq            mm6,        [rcx+8]
+
+        paddw           mm7,        mm6
+        pmulhuw         mm7,        mm5
+
+        pxor            mm7,        mm4
+        psubw           mm7,        mm4;gain the sign back
+
+        mov             rdi,        arg(2) ;qcoeff_ptr
+
+        movq            mm1,        mm7
+        movq            [rdi+8],    mm7
+
+        mov             rax,        arg(3) ;dequant_ptr
+        movq            mm6,        [rax+8]
+
+        pmullw          mm7,        mm6
+        mov             rax,        arg(7) ;dqcoeff_ptr
+
+        movq            [rax+8],    mm7
+
+
+                ; next 8
+        movq            mm4,        [rsi+16]
+
+        mov             rax,        arg(1) ;zbin_ptr
+        movq            mm5,        [rax+16]
+
+        movq            mm7,        mm4
+        psraw           mm4,        15
+
+        pxor            mm7,        mm4
+        psubw           mm7,        mm4         ; abs
+
+        movq            mm6,        mm7
+        pcmpgtw         mm5,        mm6
+
+        pandn           mm5,        mm6
+        movq            mm7,        mm5
+
+        movq            mm5,        [rdx+16]
+        movq            mm6,        [rcx+16]
+
+        paddw           mm7,        mm6
+        pmulhuw         mm7,        mm5
+
+        pxor            mm7,        mm4
+        psubw           mm7,        mm4;gain the sign back
+
+        mov             rdi,        arg(2) ;qcoeff_ptr
+
+        movq            mm1,        mm7
+        movq            [rdi+16],   mm7
+
+        mov             rax,        arg(3) ;dequant_ptr
+        movq            mm6,        [rax+16]
+
+        pmullw          mm7,        mm6
+        mov             rax,        arg(7) ;dqcoeff_ptr
+
+        movq            [rax+16],   mm7
+
+
+                ; next 8
+        movq            mm4,        [rsi+24]
+
+        mov             rax,        arg(1) ;zbin_ptr
+        movq            mm5,        [rax+24]
+
+        movq            mm7,        mm4
+        psraw           mm4,        15
+
+        pxor            mm7,        mm4
+        psubw           mm7,        mm4         ; abs
+
+        movq            mm6,        mm7
+        pcmpgtw         mm5,        mm6
+
+        pandn           mm5,        mm6
+        movq            mm7,        mm5
+
+        movq            mm5,        [rdx+24]
+        movq            mm6,        [rcx+24]
+
+        paddw           mm7,        mm6
+        pmulhuw         mm7,        mm5
+
+        pxor            mm7,        mm4
+        psubw           mm7,        mm4;gain the sign back
+
+        mov             rdi,        arg(2) ;qcoeff_ptr
+
+        movq            mm1,        mm7
+        movq            [rdi+24],   mm7
+
+        mov             rax,        arg(3) ;dequant_ptr
+        movq            mm6,        [rax+24]
+
+        pmullw          mm7,        mm6
+        mov             rax,        arg(7) ;dqcoeff_ptr
+
+        movq            [rax+24],   mm7
+
+
+
+        mov             rdi,        arg(4) ;scan_mask
+        mov             rsi,        arg(2) ;qcoeff_ptr
+
+        pxor            mm5,        mm5
+        pxor            mm7,        mm7
+
+        movq            mm0,        [rsi]
+        movq            mm1,        [rsi+8]
+
+        movq            mm2,        [rdi]
+        movq            mm3,        [rdi+8];
+
+        pcmpeqw         mm0,        mm7
+        pcmpeqw         mm1,        mm7
+
+        pcmpeqw         mm6,        mm6
+        pxor            mm0,        mm6
+
+        pxor            mm1,        mm6
+        psrlw           mm0,        15
+
+        psrlw           mm1,        15
+        pmaddwd         mm0,        mm2
+
+        pmaddwd         mm1,        mm3
+        movq            mm5,        mm0
+
+        paddd           mm5,        mm1
+
+        movq            mm0,        [rsi+16]
+        movq            mm1,        [rsi+24]
+
+        movq            mm2,        [rdi+16]
+        movq            mm3,        [rdi+24];
+
+        pcmpeqw         mm0,        mm7
+        pcmpeqw         mm1,        mm7
+
+        pcmpeqw         mm6,        mm6
+        pxor            mm0,        mm6
+
+        pxor            mm1,        mm6
+        psrlw           mm0,        15
+
+        psrlw           mm1,        15
+        pmaddwd         mm0,        mm2
+
+        pmaddwd         mm1,        mm3
+        paddd           mm5,        mm0
+
+        paddd           mm5,        mm1
+        movq            mm0,        mm5
+
+        psrlq           mm5,        32
+        paddd           mm0,        mm5
+
+        ; eob adjustment begins here
+        movq            rcx,        mm0
+        and             rcx,        0xffff
+
+        xor             rdx,        rdx
+        sub             rdx,        rcx ; rdx=-rcx
+
+        bsr             rax,        rcx
+        inc             rax
+
+        sar             rdx,        31
+        and             rax,        rdx
+        ; Substitute the sse assembly for the old mmx mixed assembly/C. The
+        ; following is kept as reference
+        ;    movq            rcx,        mm0
+        ;    bsr             rax,        rcx
+        ;
+        ;    mov             eob,        rax
+        ;    mov             eee,        rcx
+        ;
+        ;if(eee==0)
+        ;{
+        ;    eob=-1;
+        ;}
+        ;else if(eee<0)
+        ;{
+        ;    eob=15;
+        ;}
+        ;d->eob = eob+1;
+
+    ; begin epilog
+    pop rdi
+    pop rsi
+    UNSHADOW_ARGS
+    pop         rbp
+    ret