From 591073be98300e1c07527af45c7c4ce8dff5bc39 Mon Sep 17 00:00:00 2001 From: Bernhard Schommer Date: Wed, 12 Sep 2018 14:32:01 +0200 Subject: Generate a nop instruction after some ais annotations (#137) * Generate a nop instruction after ais annotations. In order to prevent the merging of ais annotations with following Labels a nop instruction is inserted, but only if the annotation is followed immediately by a label. The insertion of nop instructions is performed during the expansion of builtin and pseudo assembler instructions and is processor independent, by inserting a __builtin_nop built-in. * Add Pnop instruction to ARM, RISC-V, and x86 ARM as well as RISC-V don't have nop instructions that can be easily encoded by for example add with zero instructions. For x86 we used to use `mov X0, X0` for nop but this may not be as efficient as the true nop instruction. * Implement __builtin_nop on all supported target architectures. This builtin is not yet made available on the C side for all architectures. Bug 24067 --- backend/Asmexpandaux.mli | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'backend/Asmexpandaux.mli') diff --git a/backend/Asmexpandaux.mli b/backend/Asmexpandaux.mli index 797eb10c..d80b4aec 100644 --- a/backend/Asmexpandaux.mli +++ b/backend/Asmexpandaux.mli @@ -31,6 +31,6 @@ val set_current_function: coq_function -> unit (* Set the current function *) val get_current_function: unit -> coq_function (* Get the current function *) -val expand_debug: positive -> int -> (preg -> int) -> (instruction -> unit) -> instruction list -> unit - (* Expand builtin debug function. Takes the function id, the register number of the stackpointer, a - function to get the dwarf mapping of varibale names and for the expansion of simple instructions *) +val expand: positive -> int -> (preg -> int) -> (instruction -> unit) -> instruction list -> unit + (* Expand the instruction sequence of a function. Takes the function id, the register number of the stackpointer, a + function to get the dwarf mapping of varibale names and for the expansion of simple instructions *) -- cgit