That's another huge pitfall for 64-Bit performance, when porting existing applications. Furthermore "inline assembly" is no longer supported by MSVC for 64-Bit, which means that all existing inline assembly must be disabled/replaced when compiling amd64 binaries with MSVC. MPC-BE All 6 Experiences Pros 6 Top Pro Supports madVR external Video renderer madVR is a high quality video renderer (GPU assisted). As far as I know, this is one major reason why assembler code written for x86 cannot be ported to amd64 easily. Disabling the assembler code means that we fall back to the plain C code, which will be much slower than the highly-optimized assembler code, even if compiled for amd64.īTW: It is correct that all "instructions" of x86 are still available on amd64, but the ABI (Application Binary Interface) has changed significantly between 32-Bit and 64-Bit - at least on the Microsoft Windows platforms. So when we built a software for amd64 instead of x86, we must either port all the assembler code to amd64 manually - which may be a though task and a lot of work - or we simply disable all the assembler code that won't run on amd64 yet. Supported operating systems include Windows XP, Vista, 7, 8, 8.1, or 10. However assembler code written for the x86 architecture - and 99% of all assembler code written for PC software in the last three decades was developed for x86 - doesn't run on amd64 (aka "x86-64") automatically. Media Player Classic is known for its simple and clean interface and compatibility across devices.
Even the best compilers with all their fancy auto-optimizations can't generated code that is as fast as a hand-optimized code written by one of the assembler gurus. And the best performance is still achieved with hand-optimized assembler code. Decoders are highly optimized code, in order to provide good playback performance.
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