bdbecea1ba
nasm should infer .text but does not for windows: https://bugzilla.nasm.us/show_bug.cgi?id=3392451 Change-Id: Ib195465e5f33405f5ff61c4cf88aa2a72640cacb
89 lines
2.4 KiB
NASM
89 lines
2.4 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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SECTION .text
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;void vpx_plane_add_noise_sse2(uint8_t *start, const int8_t *noise,
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; int blackclamp, int whiteclamp,
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; int width, int height, int pitch)
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global sym(vpx_plane_add_noise_sse2) PRIVATE
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sym(vpx_plane_add_noise_sse2):
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push rbp
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mov rbp, rsp
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SHADOW_ARGS_TO_STACK 7
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GET_GOT rbx
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push rsi
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push rdi
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mov rdx, 0x01010101
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mov rax, arg(2)
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mul rdx
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movq xmm3, rax
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pshufd xmm3, xmm3, 0 ; xmm3 is 16 copies of char in blackclamp
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mov rdx, 0x01010101
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mov rax, arg(3)
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mul rdx
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movq xmm4, rax
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pshufd xmm4, xmm4, 0 ; xmm4 is 16 copies of char in whiteclamp
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movdqu xmm5, xmm3 ; both clamp = black clamp + white clamp
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paddusb xmm5, xmm4
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.addnoise_loop:
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call sym(LIBVPX_RAND) WRT_PLT
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mov rcx, arg(1) ;noise
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and rax, 0xff
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add rcx, rax
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mov rdi, rcx
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movsxd rcx, dword arg(4) ;[Width]
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mov rsi, arg(0) ;Pos
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xor rax, rax
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.addnoise_nextset:
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movdqu xmm1,[rsi+rax] ; get the source
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psubusb xmm1, xmm3 ; subtract black clamp
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paddusb xmm1, xmm5 ; add both clamp
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psubusb xmm1, xmm4 ; subtract whiteclamp
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movdqu xmm2,[rdi+rax] ; get the noise for this line
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paddb xmm1,xmm2 ; add it in
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movdqu [rsi+rax],xmm1 ; store the result
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add rax,16 ; move to the next line
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cmp rax, rcx
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jl .addnoise_nextset
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movsxd rax, dword arg(6) ; Pitch
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add arg(0), rax ; Start += Pitch
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sub dword arg(5), 1 ; Height -= 1
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jg .addnoise_loop
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; begin epilog
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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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SECTION_RODATA
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align 16
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rd42:
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times 8 dw 0x04
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four8s:
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times 4 dd 8
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