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coprocessor: Implement fast-path for Coproc{Send,Get}{OneWord,TwoWords}

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Allow coprocessor interface to provide pointers instead of a callback.
This allows for a fastpath when all that is required is to read or write a
value and no other action needs to be taken.
This commit is contained in:
MerryMage 2016-12-31 11:27:11 +00:00 • committed by Merry
parent e3bc7d039f
commit 9ecdd32b84
2 changed files with 103 additions and 21 deletions
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30
include/dynarmic/coprocessor.h
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@ -36,6 +36,20 @@ public:
boost::optional<void*> user_arg;
};
/**
* boost::blank: coprocessor exception will be compiled
* Callback: a call to the Callback will be compiled
* std::uint32_t*: a write/read to that memory address will be compiled
*/
using CallbackOrAccessOneWord = boost::variant<boost::blank, Callback, std::uint32_t*>;
/**
* boost::blank: coprocessor exception will be compiled
* Callback: a call to the Callback will be compiled
* std::array<std::uint32_t*, 2>: a write/read to those memory addresses will be compiled
*/
using CallbackOrAccessTwoWords = boost::variant<boost::blank, Callback, std::array<std::uint32_t*, 2>>;
/**
* Called when compiling CDP or CDP2 for this coprocessor.
* A return value of boost::none will cause a coprocessor exception to be compiled.
@ -45,38 +59,38 @@ public:
/**
* Called when compiling MCR or MCR2 for this coprocessor.
* A return value of boost::none will cause a coprocessor exception to be compiled.
* A return value of boost::blank will cause a coprocessor exception to be compiled.
* arg0 of the callback will contain the word sent to the coprocessor.
* arg1 and return value of the callback are ignored.
*/
virtual boost::optional<Callback> CompileSendOneWord(bool two, unsigned opc1, CoprocReg CRn, CoprocReg CRm, unsigned opc2) = 0;
virtual CallbackOrAccessOneWord CompileSendOneWord(bool two, unsigned opc1, CoprocReg CRn, CoprocReg CRm, unsigned opc2) = 0;
/**
* Called when compiling MCRR or MCRR2 for this coprocessor.
* A return value of boost::none will cause a coprocessor exception to be compiled.
* A return value of boost::blank will cause a coprocessor exception to be compiled.
* arg0 and arg1 of the callback will contain the words sent to the coprocessor.
* The return value of the callback is ignored.
*/
virtual boost::optional<Callback> CompileSendTwoWords(bool two, unsigned opc, CoprocReg CRm) = 0;
virtual CallbackOrAccessTwoWords CompileSendTwoWords(bool two, unsigned opc, CoprocReg CRm) = 0;
/**
* Called when compiling MRC or MRC2 for this coprocessor.
* A return value of boost::none will cause a coprocessor exception to be compiled.
* A return value of boost::blank will cause a coprocessor exception to be compiled.
* The return value of the callback should contain word from coprocessor.
* The low word of the return value will be stored in Rt.
* arg0 and arg1 of the callback are ignored.
*/
virtual boost::optional<Callback> CompileGetOneWord(bool two, unsigned opc1, CoprocReg CRn, CoprocReg CRm, unsigned opc2) = 0;
virtual CallbackOrAccessOneWord CompileGetOneWord(bool two, unsigned opc1, CoprocReg CRn, CoprocReg CRm, unsigned opc2) = 0;
/**
* Called when compiling MRRC or MRRC2 for this coprocessor.
* A return value of boost::none will cause a coprocessor exception to be compiled.
* A return value of boost::blank will cause a coprocessor exception to be compiled.
* The return value of the callback should contain words from coprocessor.
* The low word of the return value will be stored in Rt.
* The high word of the return value will be stored in Rt2.
* arg0 and arg1 of the callback are ignored.
*/
virtual boost::optional<Callback> CompileGetTwoWords(bool two, unsigned opc, CoprocReg CRm) = 0;
virtual CallbackOrAccessTwoWords CompileGetTwoWords(bool two, unsigned opc, CoprocReg CRm) = 0;
/**
* Called when compiling LDC or LDC2 for this coprocessor.