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author | Xavier Leroy <xavier.leroy@inria.fr> | 2015-05-09 09:00:51 +0200 |
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committer | Xavier Leroy <xavier.leroy@inria.fr> | 2015-05-09 09:00:51 +0200 |
commit | a6b6bf31121d975c915c01f501618d97df7879fb (patch) | |
tree | 061cf73e547622695621fc05ce692c029991c9e0 /arm/Machregsaux.ml | |
parent | 56bac3dc3d45c219db5d9c7b6a97794c00f8115e (diff) | |
download | compcert-kvx-a6b6bf31121d975c915c01f501618d97df7879fb.tar.gz compcert-kvx-a6b6bf31121d975c915c01f501618d97df7879fb.zip |
Extended inline asm: revised treatment of clobbered registers.
- Treat clobbered registers as being destroyed by EF_inline_asm builtins
(which is the truth, semantically).
- To enable the above, represent clobbers as Coq strings rather than idents
and move register_by_name from Machregsaux.ml to Machregs.v.
- Side benefit: more efficient implementation of Machregsaux.name_of_register.
-# Please enter the commit message for your changes. Lines starting
Diffstat (limited to 'arm/Machregsaux.ml')
-rw-r--r-- | arm/Machregsaux.ml | 35 |
1 files changed, 9 insertions, 26 deletions
diff --git a/arm/Machregsaux.ml b/arm/Machregsaux.ml index 44e6b192..d59ec8b8 100644 --- a/arm/Machregsaux.ml +++ b/arm/Machregsaux.ml @@ -12,41 +12,24 @@ (** Auxiliary functions on machine registers *) +open Camlcoq open Machregs -let register_names = [ - ("R0", R0); ("R1", R1); ("R2", R2); ("R3", R3); - ("R4", R4); ("R5", R5); ("R6", R6); ("R7", R7); - ("R8", R8); ("R9", R9); ("R10", R10); ("R11", R11); - ("R12", R12); - ("F0", F0); ("F1", F1); ("F2", F2); ("F3", F3); - ("F4", F4); ("F5", F5); ("F6", F6); ("F7", F7); - ("F8", F8); ("F9", F9); ("F10", F10); ("F11", F11); - ("F12", F12);("F13", F13);("F14", F14); ("F15", F15) -] +let register_names : (mreg, string) Hashtbl.t = Hashtbl.create 31 + +let _ = + List.iter + (fun (s, r) -> Hashtbl.add register_names r (camlstring_of_coqstring s)) + Machregs.register_names let scratch_register_names = [ "R14" ] let name_of_register r = - let rec rev_assoc = function - | [] -> None - | (a, b) :: rem -> if b = r then Some a else rev_assoc rem - in rev_assoc register_names + try Some (Hashtbl.find register_names r) with Not_found -> None let register_by_name s = - try - Some(List.assoc (String.uppercase s) register_names) - with Not_found -> - None + Machregs.register_by_name (coqstring_of_camlstring (String.uppercase s)) let can_reserve_register r = List.mem r Conventions1.int_callee_save_regs || List.mem r Conventions1.float_callee_save_regs - -let mregs_of_clobber idl = - List.fold_left - (fun l c -> - match register_by_name (Camlcoq.extern_atom c) with - | Some r -> r :: l - | None -> l) - [] idl |