29779 2009-09-27 02:32:40 -0700 Hard dependency on SSE2 instruction set with JIT 2009-09-28 13:43:15 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) PC Linux RESOLVED FIXED P2 Major --- 0 plaes webkit-unassigned barraclough oliver zuh oldest_to_newest 150371 0 plaes 2009-09-27 02:32:40 -0700 It seems that a while ago JIT code has hard dependency on machines with SSE instruction set, as it has hardcoded xorpd instruction into the source. This breaks at least athlon-xp machines on x86 platform: Program received signal SIGILL, Illegal instruction. [Switching to Thread 0xb463b940 (LWP 10463)] 0xae14e01a in ?? () (gdb) x/8i $pc 0xae14e01a: xorpd %xmm0,%xmm0 0xae14e01e: movsd (%edi),%xmm1 0xae14e022: ucomisd %xmm1,%xmm0 0xae14e026: je 0xae14e1ce 0xae14e02c: mov $0xae340080,%eax 0xae14e031: mov 0xaf051c3c,%edx 0xae14e037: cmp 0x4(%eax),%edx 0xae14e03a: jne 0xae14e60d There's also similar bug report on debian bugtracker: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=548339 processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 6 model name : AMD Athlon(tm) XP 2000+ stepping : 2 cpu MHz : 1663.937 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow bogomips : 3327.87 clflush size : 32 power management: ts 150632 1 40254 oliver 2009-09-28 13:35:18 -0700 Created attachment 40254 Patch v1 150634 2 40254 ggaren 2009-09-28 13:39:16 -0700 Comment on attachment 40254 Patch v1 r=me 150638 3 oliver 2009-09-28 13:43:15 -0700 Committed r48830 40254 2009-09-28 13:35:18 -0700 2009-09-28 13:39:16 -0700 Patch v1 bug-29779-20090928133517.patch text/plain 3573 oliver ZGlmZiAtLWdpdCBhL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZyBiL0phdmFTY3JpcHRDb3JlL0No YW5nZUxvZwppbmRleCA5YTkxOGVkLi5iYWVhOTczIDEwMDY0NAotLS0gYS9KYXZhU2NyaXB0Q29y ZS9DaGFuZ2VMb2cKKysrIGIvSmF2YVNjcmlwdENvcmUvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMTkg QEAKKzIwMDktMDktMjggIE9saXZlciBIdW50ICA8b2xpdmVyQGFwcGxlLmNvbT4KKworICAgICAg ICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBIYXJkIGRlcGVuZGVuY3kg b24gU1NFMiBpbnN0cnVjdGlvbiBzZXQgd2l0aCBKSVQKKyAgICAgICAgaHR0cHM6Ly9idWdzLndl YmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTI5Nzc5CisKKyAgICAgICAgQWRkIGZsb2F0aW5nIHBv aW50IHN1cHBvcnQgY2hlY2tzIHRvIG9wX2pmYWxzZSBhbmQgb3BfanRydWUsIGFuZAorICAgICAg ICBmaXggdGhlIGxvZ2ljIGZvciB0aGUgc2xvdyBjYXNlIG9mIG9wX2FkZAorCisgICAgICAgICog aml0L0pJVEFyaXRobWV0aWMuY3BwOgorICAgICAgICAoSlNDOjpKSVQ6OmVtaXRTbG93X29wX2Fk 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