Hi, from paltform.h it is enabled only on X86 MAC/WIN; from javaScriptCore.pri it is also enabled for (QT_ARCH,i386). But, from config.log I see them are enabled!
how can I run WREC/JIT test so I can trace in X86 asm coce generated? thanks a lot. joe --- On Sat, 2/7/09, Gavin Barraclough <barraclo...@apple.com> wrote: > From: Gavin Barraclough <barraclo...@apple.com> > Subject: Re: [webkit-dev] want to port JIT to MIPS - using X86::ecx as base > To: last...@yahoo.com > Cc: "WebKit Development" <webkit-dev@lists.webkit.org> > Date: Saturday, February 7, 2009, 7:08 AM > On Feb 6, 2009, at 2:52 PM, x yz wrote: > > > 1.what's the meaning of ALTERNATE_JSIMMEDIATE and > slow case? > > On x86-64 we use a different implementation of the class > JSImmediate. See JSImmediate.h. > Re 'slow case', in the JIT code generation is > performed as two passes over the bytecode – see > JIT::privateCompileMainPass and > JIT::privateCompileSlowCases. > > > 2.how come the following code can use ECX as base > register? > > load32(Address(X86::ecx, FIELD_OFFSET(Structure, > m_typeInfo.m_flags)), X86::ecx); > > if the X86::ecx just means its value 1 in ModR/M, does > it means [BX+DI]? > > I think you're looking at the old 16-bit addressing > mode tables; 32/64-bit x86 can happily encode ecx as a base > register. If you're looking at the Intel IA-32 manual > volume 2, see table 2-2 on the next page. > > > 3. can anybody help me on my previous questions? does > JIT support floating point? > > Yes, some. See JITArithmetic.cpp. > > cheers, > G. _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev