From 2ae43be7b9d4118335c9d2cef6e098f9b9f807fe Mon Sep 17 00:00:00 2001
From: xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e>
Date: Thu, 9 Feb 2006 14:55:48 +0000
Subject: Initial import of compcert

git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
---
 backend/Registers.v | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 backend/Registers.v

(limited to 'backend/Registers.v')

diff --git a/backend/Registers.v b/backend/Registers.v
new file mode 100644
index 00000000..30935893
--- /dev/null
+++ b/backend/Registers.v
@@ -0,0 +1,49 @@
+(** Pseudo-registers and register states.
+
+  This library defines the type of pseudo-registers used in the RTL
+  intermediate language, and of mappings from pseudo-registers to
+  values as used in the dynamic semantics of RTL. *)
+
+Require Import Bool.
+Require Import Coqlib.
+Require Import AST.
+Require Import Maps.
+Require Import Sets.
+
+Definition reg: Set := positive.
+
+Module Reg.
+
+Definition eq := peq.
+
+Definition typenv := PMap.t typ.
+
+End Reg.
+
+(** Mappings from registers to some type. *)
+
+Module Regmap := PMap.
+
+Set Implicit Arguments.
+
+Definition regmap_optget
+    (A: Set) (or: option reg) (dfl: A) (rs: Regmap.t A) : A :=
+  match or with
+  | None => dfl
+  | Some r => Regmap.get r rs
+  end.
+
+Definition regmap_optset
+    (A: Set) (or: option reg) (v: A) (rs: Regmap.t A) : Regmap.t A :=
+  match or with
+  | None => rs
+  | Some r => Regmap.set r v rs
+  end.
+
+Notation "a # b" := (Regmap.get b a) (at level 1).
+Notation "a ## b" := (List.map (fun r => Regmap.get r a) b) (at level 1).
+Notation "a # b <- c" := (Regmap.set b c a) (at level 1, b at next level).
+
+(** Sets of registers *)
+
+Module Regset := MakeSet(PTree).
-- 
cgit