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Helper macros to annotate likely branch directions. Colateral effect: this
also fixes build with GCC 4.1 (ppc-dyngen-ops.cpp) since the branches are re-ordered in a way there is now only one exit-point in op_jump_next_A0().
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@ -166,6 +166,21 @@ typedef int64 intptr;
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#error "Unsupported size of pointer"
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#endif
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/**
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* Helper macros to annotate likely branch directions
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**/
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#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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#define likely(x) __builtin_expect((x),1)
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#define unlikely(x) __builtin_expect((x),0)
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#endif
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#ifndef likely
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#define likely(x) (x)
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#endif
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#ifndef unlikely
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#define unlikely(x) (x)
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#endif
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/**
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* Helper functions to byteswap data
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**/
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@ -1246,10 +1246,10 @@ void OPPROTO op_dcbz_T0(void)
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void OPPROTO op_jump_next_A0(void)
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{
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// Make sure there is no pending interrupt request
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if (powerpc_dyngen_helper::spcflags().empty()) {
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if (likely(powerpc_dyngen_helper::spcflags().empty())) {
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powerpc_block_info *bi = (powerpc_block_info *)reg_A0;
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uint32 pc = powerpc_dyngen_helper::get_pc();
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if (bi->pc == pc || (bi = powerpc_dyngen_helper::find_block(pc)) != NULL)
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if (likely(bi->pc == pc) || likely((bi = powerpc_dyngen_helper::find_block(pc)) != NULL))
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goto *(bi->entry_point);
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}
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dyngen_barrier();
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