6f6bd282c9
New code is 20% faster for 64-bit and 15% faster for 32-bit. Compiled using clang. Change-Id: Icfea461238411001fd093561293dbfedfbf8d0bb
70 lines
1.6 KiB
NASM
70 lines
1.6 KiB
NASM
;
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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%include "vpx_ports/x86_abi_support.asm"
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;unsigned int vp9_get_mb_ss_sse2
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;(
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; short *src_ptr
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;)
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global sym(vp9_get_mb_ss_sse2) PRIVATE
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sym(vp9_get_mb_ss_sse2):
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push rbp
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mov rbp, rsp
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SHADOW_ARGS_TO_STACK 1
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GET_GOT rbx
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push rsi
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push rdi
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sub rsp, 16
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; end prolog
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mov rax, arg(0) ;[src_ptr]
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mov rcx, 8
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pxor xmm4, xmm4
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.NEXTROW:
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movdqa xmm0, [rax]
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movdqa xmm1, [rax+16]
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movdqa xmm2, [rax+32]
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movdqa xmm3, [rax+48]
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pmaddwd xmm0, xmm0
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pmaddwd xmm1, xmm1
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pmaddwd xmm2, xmm2
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pmaddwd xmm3, xmm3
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paddd xmm0, xmm1
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paddd xmm2, xmm3
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paddd xmm4, xmm0
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paddd xmm4, xmm2
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add rax, 0x40
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dec rcx
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ja .NEXTROW
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movdqa xmm3,xmm4
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psrldq xmm4,8
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paddd xmm4,xmm3
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movdqa xmm3,xmm4
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psrldq xmm4,4
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paddd xmm4,xmm3
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movq rax,xmm4
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; begin epilog
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add rsp, 16
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pop rdi
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pop rsi
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RESTORE_GOT
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UNSHADOW_ARGS
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pop rbp
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ret
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