From 534ce69ff05bee2448419f9cad796d6511bc1f9a Mon Sep 17 00:00:00 2001
From: ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 11 Apr 2007 02:13:00 +0000
Subject: [PATCH] More Context/Xcontext fixes. Ifdef some 64bit-only ops, they
 may end up empty for 32bit mips, which dyngen trips over.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2648 c046a42c-6fe2-441c-8c8c-71466251a162
---
 target-mips/op.c        | 14 +++++---------
 target-mips/translate.c |  6 +++++-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/target-mips/op.c b/target-mips/op.c
index 026b08a..9818847 100644
--- a/target-mips/op.c
+++ b/target-mips/op.c
@@ -1293,7 +1293,7 @@ void op_mtc0_entrylo1 (void)
 
 void op_mtc0_context (void)
 {
-    env->CP0_Context = (env->CP0_Context & ~0x007FFFFF) | (T0 & ~0x007FFFFF);
+    env->CP0_Context = (env->CP0_Context & 0x007FFFFF) | (T0 & ~0x007FFFFF);
     RETURN();
 }
 
@@ -1458,12 +1458,6 @@ void op_mtc0_watchhi0 (void)
     RETURN();
 }
 
-void op_mtc0_xcontext (void)
-{
-    env->CP0_XContext = (int32_t)T0; /* XXX */
-    RETURN();
-}
-
 void op_mtc0_framemask (void)
 {
     env->CP0_Framemask = T0; /* XXX */
@@ -1528,6 +1522,7 @@ void op_mtc0_desave (void)
     RETURN();
 }
 
+#ifdef TARGET_MIPS64
 void op_dmfc0_entrylo0 (void)
 {
     T0 = env->CP0_EntryLo0;
@@ -1612,7 +1607,7 @@ void op_dmtc0_entrylo1 (void)
 
 void op_dmtc0_context (void)
 {
-    env->CP0_Context = (env->CP0_Context & ~0x007FFFFF) | (T0 & 0x007FFFF0);
+    env->CP0_Context = (env->CP0_Context & 0x007FFFFF) | (T0 & ~0x007FFFFF);
     RETURN();
 }
 
@@ -1632,7 +1627,7 @@ void op_dmtc0_watchlo0 (void)
 
 void op_dmtc0_xcontext (void)
 {
-    env->CP0_XContext = T0; /* XXX */
+    env->CP0_XContext = (env->CP0_XContext & 0xffffffff) | (T0 & ~0xffffffff);
     RETURN();
 }
 
@@ -1647,6 +1642,7 @@ void op_dmtc0_errorepc (void)
     env->CP0_ErrorEPC = T0;
     RETURN();
 }
+#endif /* TARGET_MIPS64 */
 
 #if 0
 # define DEBUG_FPU_STATE() CALL_FROM_TB1(dump_fpu, env)
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 0d9226a..8aacbd0 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -2750,7 +2750,7 @@ static void gen_mtc0 (DisasContext *ctx, int reg, int sel)
         switch (sel) {
         case 0:
            /* 64 bit MMU only */
-           gen_op_mtc0_xcontext();
+           /* Nothing writable in lower 32 bits */
            rn = "XContext";
            break;
         default:
@@ -2946,6 +2946,7 @@ die:
     generate_exception(ctx, EXCP_RI);
 }
 
+#ifdef TARGET_MIPS64
 static void gen_dmfc0 (DisasContext *ctx, int reg, int sel)
 {
     const char *rn = "invalid";
@@ -4120,6 +4121,7 @@ die:
 #endif
     generate_exception(ctx, EXCP_RI);
 }
+#endif /* TARGET_MIPS64 */
 
 static void gen_cp0 (DisasContext *ctx, uint32_t opc, int rt, int rd)
 {
@@ -4140,6 +4142,7 @@ static void gen_cp0 (DisasContext *ctx, uint32_t opc, int rt, int rd)
         gen_mtc0(ctx, rd, ctx->opcode & 0x7);
         opn = "mtc0";
         break;
+#ifdef TARGET_MIPS64
     case OPC_DMFC0:
         if (rt == 0) {
             /* Treat as NOP */
@@ -4154,6 +4157,7 @@ static void gen_cp0 (DisasContext *ctx, uint32_t opc, int rt, int rd)
         gen_dmtc0(ctx, rd, ctx->opcode & 0x7);
         opn = "dmtc0";
         break;
+#endif
 #if defined(MIPS_USES_R4K_TLB)
     case OPC_TLBWI:
         gen_op_tlbwi();
-- 
2.7.4