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08fa8da77c
Andreas Ertelt The problem in question is caused by changeset 7771 (http://hg.libsdl.org/SDL/rev/5486e579872e / https://bugzilla.libsdl.org/show_bug.cgi?id=2121) The redefinition of __inline__ (introduced by the addition of begin_code.h:128's "|| __STRICT_ANSI__") results in mingw's gcc throwing multiple warning: always_inline function might not be inlinable [-Wattributes] as well as a whole bunch of redefinitions of mingw internals which break linking of projects including the SDL2 headers.
153 lines
3.7 KiB
C
153 lines
3.7 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#include "SDL_video.h"
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#include "SDL_blit.h"
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#include "SDL_blit_copy.h"
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#ifdef __SSE__
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/* This assumes 16-byte aligned src and dst */
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static SDL_INLINE void
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SDL_memcpySSE(Uint8 * dst, const Uint8 * src, int len)
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{
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int i;
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__m128 values[4];
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for (i = len / 64; i--;) {
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_mm_prefetch(src, _MM_HINT_NTA);
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values[0] = *(__m128 *) (src + 0);
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values[1] = *(__m128 *) (src + 16);
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values[2] = *(__m128 *) (src + 32);
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values[3] = *(__m128 *) (src + 48);
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_mm_stream_ps((float *) (dst + 0), values[0]);
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_mm_stream_ps((float *) (dst + 16), values[1]);
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_mm_stream_ps((float *) (dst + 32), values[2]);
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_mm_stream_ps((float *) (dst + 48), values[3]);
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src += 64;
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dst += 64;
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}
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if (len & 63)
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SDL_memcpy(dst, src, len & 63);
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}
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#endif /* __SSE__ */
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#ifdef __MMX__
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#ifdef _MSC_VER
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#pragma warning(disable:4799)
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#endif
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static SDL_INLINE void
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SDL_memcpyMMX(Uint8 * dst, const Uint8 * src, int len)
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{
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const int remain = (len & 63);
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int i;
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__m64* d64 = (__m64*)dst;
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__m64* s64 = (__m64*)src;
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for(i= len / 64; i--;) {
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d64[0] = s64[0];
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d64[1] = s64[1];
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d64[2] = s64[2];
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d64[3] = s64[3];
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d64[4] = s64[4];
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d64[5] = s64[5];
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d64[6] = s64[6];
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d64[7] = s64[7];
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d64 += 8;
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s64 += 8;
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}
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if (remain)
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{
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const int skip = len - remain;
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SDL_memcpy(dst + skip, src + skip, remain);
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}
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}
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#endif /* __MMX__ */
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void
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SDL_BlitCopy(SDL_BlitInfo * info)
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{
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SDL_bool overlap;
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Uint8 *src, *dst;
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int w, h;
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int srcskip, dstskip;
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w = info->dst_w * info->dst_fmt->BytesPerPixel;
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h = info->dst_h;
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src = info->src;
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dst = info->dst;
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srcskip = info->src_pitch;
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dstskip = info->dst_pitch;
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/* Properly handle overlapping blits */
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if (src < dst) {
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overlap = (dst < (src + h*srcskip));
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} else {
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overlap = (src < (dst + h*dstskip));
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}
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if (overlap) {
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while (h--) {
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SDL_memmove(dst, src, w);
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src += srcskip;
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dst += dstskip;
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}
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return;
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}
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#ifdef __SSE__
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if (SDL_HasSSE() &&
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!((uintptr_t) src & 15) && !(srcskip & 15) &&
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!((uintptr_t) dst & 15) && !(dstskip & 15)) {
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while (h--) {
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SDL_memcpySSE(dst, src, w);
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src += srcskip;
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dst += dstskip;
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}
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return;
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}
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#endif
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#ifdef __MMX__
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if (SDL_HasMMX() && !(srcskip & 7) && !(dstskip & 7)) {
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while (h--) {
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SDL_memcpyMMX(dst, src, w);
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src += srcskip;
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dst += dstskip;
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}
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_mm_empty();
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return;
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}
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#endif
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while (h--) {
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SDL_memcpy(dst, src, w);
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src += srcskip;
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dst += dstskip;
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}
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}
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/* vi: set ts=4 sw=4 expandtab: */
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