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Make lexing ARM-friendly #21

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duck2 opened this issue Jul 21, 2019 · 0 comments

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duck2 commented Jul 21, 2019

The current trie lexer makes use of the fast unaligned 32/64 bit access found in amd64 architectures:

inline enum_pin_type lex_pin_type(const char *in){
	unsigned int len = strlen(in);
	switch(len){
	case 4:
		switch(*((triehash_uu32*)&in[0])){
		case onechar('O', 0, 32) | onechar('P', 8, 32) | onechar('E', 16, 32) | onechar('N', 24, 32):
			return enum_pin_type::OPEN;
[...]
}

This might run slower in other architectures. Add a knob to uxsdcxx to generate "flat" tries.

duck2 mentioned this issue

Optimize the strcmp chains in lex functions #12

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duck2 mentioned this issue

uxsdcxx output from rr_graph.xsd duck2/uxsdcxx-out#1

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