org.xwt.mips -> org.ibex.nestedvm

[nestedvm.git] / src / org / ibex / nestedvm / Registers.java

diff --git a/src/org/ibex/nestedvm/Registers.java b/src/org/ibex/nestedvm/Registers.java
new file mode 100644 (file)
index 0000000..1a885a2
--- /dev/null
+++ b/src/org/ibex/nestedvm/Registers.java
@@ -0,0 +1,42 @@
+package org.ibex.nestedvm;
+
+interface Registers {
+    // Register Names
+    public final static int ZERO = 0; // Immutable, hardwired to 0
+    public final static int AT = 1;  // Reserved for assembler
+    public final static int K0 = 26; // Reserved for kernel 
+    public final static int K1 = 27; // Reserved for kernel 
+    public final static int GP = 28; // Global pointer (the middle of .sdata/.sbss)
+    public final static int SP = 29; // Stack pointer
+    public final static int FP = 30; // Frame Pointer
+    public final static int RA = 31; // Return Address
+    
+    // Return values (caller saved)
+    public final static int V0 = 2;
+    public final static int V1 = 3;
+    // Argument Registers (caller saved)
+    public final static int A0 = 4; 
+    public final static int A1 = 5;
+    public final static int A2 = 6;
+    public final static int A3 = 7;
+    // Temporaries (caller saved)
+    public final static int T0 = 8;
+    public final static int T1 = 9;
+    public final static int T2 = 10;
+    public final static int T3 = 11;
+    public final static int T4 = 12;
+    public final static int T5 = 13;
+    public final static int T6 = 14;
+    public final static int T7 = 15;
+    public final static int T8 = 24;
+    public final static int T9 = 25;
+    // Saved (callee saved)
+    public final static int S0 = 16;
+    public final static int S1 = 17;
+    public final static int S2 = 18;
+    public final static int S3 = 19;
+    public final static int S4 = 20;
+    public final static int S5 = 21;
+    public final static int S6 = 22;
+    public final static int S7 = 23;
+}