Displaying 1 result from an estimated 1 matches for "read_flags".
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head_flags
2010 Sep 25
2
[LLVMdev] custom lowering with multiple results
...two nodes.
Imagine I have a new instruction "read_world" that sets the status flags
according to some kind of global state. In order to generate this instruction I
have a built-in function with the prototype "int __builtin_read_world(void)".
I also have a new instruction "read_flags" that sets a register according to the
status flags so I can translate a call to __builtin_read_world into a
"read_world" followed by a "read_flags" (at least as a last resort; I'm
expecting the "read_flags" instruction to be optimised away in most cases).
At...