alpha_call is 6 instructions, not 1. 5 to load the addr, 1 to call.
* jit/jit-gen-alpha.h: add macros for fp sign copy and arithmetic.
* jit/jit-rules-alpha.c: remove TODO() from unused functions.
in jit/jit-rules-alpha.c.
There is enough done on the alpha port to compile the following function
"void func(void) { return; }" and call it 1,000,000 times without anything
crashing. jit_dump_function shows a properly generated prolog and epilog.