Support for SetVReg and add SetGPR.
These changes are useful for debugging and are required for being able
to change all GC roots.
MIPS is untested.
Change-Id: I2ba055de64264098bffe869a4fb192d0975f1c8f
diff --git a/src/constants_mips.h b/src/constants_mips.h
index 32fa158..08661e9 100644
--- a/src/constants_mips.h
+++ b/src/constants_mips.h
@@ -27,14 +27,14 @@
enum Register {
ZERO = 0,
- AT = 1,
- V0 = 2,
+ AT = 1, // Assembler temporary.
+ V0 = 2, // Values.
V1 = 3,
- A0 = 4,
+ A0 = 4, // Arguments.
A1 = 5,
A2 = 6,
A3 = 7,
- T0 = 8,
+ T0 = 8, // Temporaries.
T1 = 9,
T2 = 10,
T3 = 11,
@@ -42,7 +42,7 @@
T5 = 13,
T6 = 14,
T7 = 15,
- S0 = 16,
+ S0 = 16, // Saved values.
S1 = 17,
S2 = 18,
S3 = 19,
@@ -50,14 +50,14 @@
S5 = 21,
S6 = 22,
S7 = 23,
- T8 = 24,
+ T8 = 24, // More temporaries.
T9 = 25,
- K0 = 26,
+ K0 = 26, // Reserved for trap handler.
K1 = 27,
- GP = 28,
- SP = 29,
- FP = 30,
- RA = 31,
+ GP = 28, // Global pointer.
+ SP = 29, // Stack pointer.
+ FP = 30, // Saved value/frame pointer.
+ RA = 31, // Return address.
kNumberOfCoreRegisters = 32,
kNoRegister = -1 // Signals an illegal register.
};