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riscv: Add unused attribute to some registers.hh constants

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Three of the constants defined in arch/riscv/registers.hh
(ReturnValueReg, SyscallNumReg, and SyscallPseudoReturnReg) may cause
the compiler to warn that they are unused, which results in an error.
This patch adds M5_VAR_USED attributes to them to stop this.

Change-Id: Ie6389a55e8ffb3d003a47d02e76bdf9fb5219457
Reviewed-on: https://gem5-review.googlesource.com/4040
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Alec Roelke <ar4jc@virginia.edu>
This commit is contained in:
Alec Roelke
2017-07-13 16:26:53 -04:00
parent c473bdb891
commit d72eafa64b
1 changed files with 3 additions and 3 deletions
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6
src/arch/riscv/registers.hh
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@@ -93,7 +93,7 @@ const int GlobalPointerReg = 3;
const int ThreadPointerReg = 4;
const int FramePointerReg = 8;
const std::vector<int> ReturnValueRegs = {10, 11};
const int ReturnValueReg = ReturnValueRegs[0];
const int ReturnValueReg M5_VAR_USED = ReturnValueRegs[0];
const std::vector<int> ArgumentRegs = {10, 11, 12, 13, 14, 15, 16, 17};
const int AMOTempReg = 32;
@@ -118,10 +118,10 @@ const std::vector<std::string> FloatRegNames = {
"ft8", "ft9", "ft10", "ft11"
};
const int SyscallNumReg = ArgumentRegs[7];
const int SyscallNumReg M5_VAR_USED = ArgumentRegs[7];
const std::vector<int> SyscallArgumentRegs = {ArgumentRegs[0], ArgumentRegs[1],
ArgumentRegs[2], ArgumentRegs[3]};
const int SyscallPseudoReturnReg = ReturnValueRegs[0];
const int SyscallPseudoReturnReg M5_VAR_USED = ReturnValueRegs[0];
enum MiscRegIndex {
MISCREG_USTATUS = 0x000,