Mercurial > hg > graal-compiler
diff src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 11127:980532a806a5
8016697: Use stubs to implement safefetch
Summary: Implement Safefetch as stub routines. This reduces compiler and os dependencies.
Reviewed-by: twisti, kvn
author | goetz |
---|---|
date | Thu, 20 Jun 2013 15:02:05 +0200 |
parents | 46c544b8fbfc |
children | 6b0fd0964b87 7944aba7ba41 |
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--- a/src/cpu/sparc/vm/stubGenerator_sparc.cpp Thu Jul 04 14:56:49 2013 -0700 +++ b/src/cpu/sparc/vm/stubGenerator_sparc.cpp Thu Jun 20 15:02:05 2013 +0200 @@ -410,6 +410,51 @@ return start; } + // Safefetch stubs. + void generate_safefetch(const char* name, int size, address* entry, + address* fault_pc, address* continuation_pc) { + // safefetch signatures: + // int SafeFetch32(int* adr, int errValue); + // intptr_t SafeFetchN (intptr_t* adr, intptr_t errValue); + // + // arguments: + // o0 = adr + // o1 = errValue + // + // result: + // o0 = *adr or errValue + + StubCodeMark mark(this, "StubRoutines", name); + + // Entry point, pc or function descriptor. + __ align(CodeEntryAlignment); + *entry = __ pc(); + + __ mov(O0, G1); // g1 = o0 + __ mov(O1, O0); // o0 = o1 + // Load *adr into c_rarg1, may fault. + *fault_pc = __ pc(); + switch (size) { + case 4: + // int32_t + __ ldsw(G1, 0, O0); // o0 = [g1] + break; + case 8: + // int64_t + __ ldx(G1, 0, O0); // o0 = [g1] + break; + default: + ShouldNotReachHere(); + } + + // return errValue or *adr + *continuation_pc = __ pc(); + // By convention with the trap handler we ensure there is a non-CTI + // instruction in the trap shadow. + __ nop(); + __ retl(); + __ delayed()->nop(); + } //------------------------------------------------------------------------------------------------------------------------ // Continuation point for throwing of implicit exceptions that are not handled in @@ -3315,6 +3360,14 @@ // Don't initialize the platform math functions since sparc // doesn't have intrinsics for these operations. + + // Safefetch stubs. + generate_safefetch("SafeFetch32", sizeof(int), &StubRoutines::_safefetch32_entry, + &StubRoutines::_safefetch32_fault_pc, + &StubRoutines::_safefetch32_continuation_pc); + generate_safefetch("SafeFetchN", sizeof(intptr_t), &StubRoutines::_safefetchN_entry, + &StubRoutines::_safefetchN_fault_pc, + &StubRoutines::_safefetchN_continuation_pc); }