Re: [webkit-dev] want to port JIT to MIPS - how to get of SSE2 now?

Hi, Old version seems use ENABLE_JIT_OPTIMIZE_ARITHMETIC to enable sse2 and only for X86_64, current version changes conf to: 1. you must ENABLE_JIT_OPTIMIZE_ARITHMETIC or else you use interpreter for arithmatic. 2. if ALTERNATE_JSIMMEDIATE not enabled you must have sse2 engine 3. if

Re: [webkit-dev] want to port JIT to MIPS - how to get of SSE2 now?

SSE2 code generation is guarded by calls to a function 'isSSE2Present()'. On Feb 26, 2009, at 12:27 PM, x yz wrote: Hi, Old version seems use ENABLE_JIT_OPTIMIZE_ARITHMETIC to enable sse2 and only for X86_64, current version changes conf to: 1. you must ENABLE_JIT_OPTIMIZE_ARITHMETIC or

Re: [webkit-dev] want to port JIT to MIPS - how to get of SSE2 now?

yes but if isSSE2Present() returns false the code becomes very simple so I doubt it may be slow. what's the benefit to enable/disable ALTERNATE_JSIMMEDIATE? thanks joe --- On Fri, 2/27/09, Gavin Barraclough barraclo...@apple.com wrote: From: Gavin Barraclough barraclo...@apple.com Subject:

Re: [webkit-dev] want to port JIT to MIPS - how to get of SSE2 now?

ALTERNATE_JSIMMEDIATE is only supported on 64-bit, and all 64-bit x86's have SSE2 – so the ALTERNATE_JSIMMEDIATE code is assuming that SSE2 is present. If we wanted to make ALTERNATE_JSIMMEDIATE being enabled on 32-bit x86 possible, then we would also need to check isSSE2Present() here.