diff options
Diffstat (limited to 'Source/JavaScriptCore/dfg/DFGAssemblyHelpers.h')
| -rw-r--r-- | Source/JavaScriptCore/dfg/DFGAssemblyHelpers.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/Source/JavaScriptCore/dfg/DFGAssemblyHelpers.h b/Source/JavaScriptCore/dfg/DFGAssemblyHelpers.h index 00a226d4c..e7a3132f3 100644 --- a/Source/JavaScriptCore/dfg/DFGAssemblyHelpers.h +++ b/Source/JavaScriptCore/dfg/DFGAssemblyHelpers.h @@ -150,6 +150,23 @@ public: return branch8(Below, Address(structureReg, Structure::typeInfoTypeOffset()), TrustedImm32(ObjectType)); } + static GPRReg selectScratchGPR(GPRReg preserve1 = InvalidGPRReg, GPRReg preserve2 = InvalidGPRReg, GPRReg preserve3 = InvalidGPRReg, GPRReg preserve4 = InvalidGPRReg) + { + if (preserve1 != GPRInfo::regT0 && preserve2 != GPRInfo::regT0 && preserve3 != GPRInfo::regT0 && preserve4 != GPRInfo::regT0) + return GPRInfo::regT0; + + if (preserve1 != GPRInfo::regT1 && preserve2 != GPRInfo::regT1 && preserve3 != GPRInfo::regT1 && preserve4 != GPRInfo::regT1) + return GPRInfo::regT1; + + if (preserve1 != GPRInfo::regT2 && preserve2 != GPRInfo::regT2 && preserve3 != GPRInfo::regT2 && preserve4 != GPRInfo::regT2) + return GPRInfo::regT2; + + if (preserve1 != GPRInfo::regT3 && preserve2 != GPRInfo::regT3 && preserve3 != GPRInfo::regT3 && preserve4 != GPRInfo::regT3) + return GPRInfo::regT3; + + return GPRInfo::regT4; + } + // Add a debug call. This call has no effect on JIT code execution state. void debugCall(V_DFGDebugOperation_EP function, void* argument) { @@ -164,14 +181,16 @@ public: #if CPU(X86_64) || CPU(ARM_THUMB2) move(TrustedImmPtr(argument), GPRInfo::argumentGPR1); move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0); + GPRReg scratch = selectScratchGPR(GPRInfo::argumentGPR0, GPRInfo::argumentGPR1); #elif CPU(X86) poke(GPRInfo::callFrameRegister, 0); poke(TrustedImmPtr(argument), 1); + GPRReg scratch = GPRInfo::regT0; #else #error "DFG JIT not supported on this platform." #endif - move(TrustedImmPtr(reinterpret_cast<void*>(function)), GPRInfo::regT0); - call(GPRInfo::regT0); + move(TrustedImmPtr(reinterpret_cast<void*>(function)), scratch); + call(scratch); for (unsigned i = 0; i < FPRInfo::numberOfRegisters; ++i) { move(TrustedImmPtr(buffer + GPRInfo::numberOfRegisters + i), GPRInfo::regT0); loadDouble(GPRInfo::regT0, FPRInfo::toRegister(i)); @@ -187,12 +206,14 @@ public: void jitAssertIsJSNumber(GPRReg); void jitAssertIsJSDouble(GPRReg); void jitAssertIsCell(GPRReg); + void jitAssertHasValidCallFrame(); #else void jitAssertIsInt32(GPRReg) { } void jitAssertIsJSInt32(GPRReg) { } void jitAssertIsJSNumber(GPRReg) { } void jitAssertIsJSDouble(GPRReg) { } void jitAssertIsCell(GPRReg) { } + void jitAssertHasValidCallFrame() { } #endif // These methods convert between doubles, and doubles boxed and JSValues. |