From 9ed9ff06ab3c69ec6d18df36f78085c295e6829c Mon Sep 17 00:00:00 2001
From: Aleksandar Markovic <amarkovic@wavecomp.com>
Date: Mon, 18 Nov 2019 23:37:58 -0500
Subject: [PATCH] target/mips: Clean up handling of CP0 register 27

Clean up handling of CP0 register 27.

Backports commit 5a10873d7ddd5d84c38c6f0dd69116b93219a7c1 from qemu
---
 qemu/target/mips/translate.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/qemu/target/mips/translate.c b/qemu/target/mips/translate.c
index 34cf17ff..a455ed76 100644
--- a/qemu/target/mips/translate.c
+++ b/qemu/target/mips/translate.c
@@ -7545,10 +7545,7 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_27:
         switch (sel) {
-        case 0:
-        case 1:
-        case 2:
-        case 3:
+        case CP0_REG27__CACHERR:
             tcg_gen_movi_tl(tcg_ctx, arg, 0); /* unimplemented */
             register_name = "CacheErr";
             break;
@@ -8304,10 +8301,7 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_27:
         switch (sel) {
-        case 0:
-        case 1:
-        case 2:
-        case 3:
+        case CP0_REG27__CACHERR:
             /* ignored */
             register_name = "CacheErr";
             break;
@@ -9031,10 +9025,7 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
     case CP0_REGISTER_27:
         switch (sel) {
         /* ignored */
-        case 0:
-        case 1:
-        case 2:
-        case 3:
+        case CP0_REG27__CACHERR:
             tcg_gen_movi_tl(tcg_ctx, arg, 0); /* unimplemented */
             register_name = "CacheErr";
             break;
@@ -9767,10 +9758,7 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_27:
         switch (sel) {
-        case 0:
-        case 1:
-        case 2:
-        case 3:
+        case CP0_REG27__CACHERR:
             /* ignored */
             register_name = "CacheErr";
             break;