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janwas
623e649acb
all cpu-related stuff is now defined in cpu.h (with cpu_ prefix and fully encapsulated). fix quite brittle core/HT unit/package detection. implement mkdir on VC8, where it is deprecated add strdup on MacOSX move ia32 code into separate subdir. functions implemented in asm are called ia32_asm_*. add some unix versions of sysdep functions (cannot test them) timer: fix for amd64 linux This was SVN commit r4995.
23 lines
780 B
C++
23 lines
780 B
C++
#include "precompiled.h"
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#include "ia32.h"
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#include "ia32_memcpy.h"
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// set by ia32_memcpy_init, referenced by ia32_memcpy (asm)
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// default to "all codepaths supported"
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extern "C" u32 ia32_memcpy_size_mask = ~0u;
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void ia32_memcpy_init()
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{
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// set the mask that is applied to transfer size before
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// choosing copy technique. this is the mechanism for disabling
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// codepaths that aren't supported on all CPUs; see article for details.
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// .. check for PREFETCHNTA and MOVNTQ support. these are part of the SSE
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// instruction set, but also supported on older Athlons as part of
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// the extended AMD MMX set.
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if(!ia32_cap(IA32_CAP_SSE) && !ia32_cap(IA32_CAP_AMD_MMX_EXT))
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ia32_memcpy_size_mask = 0u;
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}
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// ia32_memcpy() is defined in ia32_memcpy_asm.asm
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