[Qemu-devel] [PATCH 1/9] sparc64: trace pstate and global register set changes

["Igor V. Kovalenko" <igor.v.kovalenko@gmail.com>]

From: Igor V. Kovalenko <igor.v.kovalenko@gmail.com>

Signed-off-by: Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
---
 target-sparc/op_helper.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/target-sparc/op_helper.c b/target-sparc/op_helper.c
index dab2c25..26092e5 100644
--- a/target-sparc/op_helper.c
+++ b/target-sparc/op_helper.c
@@ -11,6 +11,7 @@
 //#define DEBUG_UNASSIGNED
 //#define DEBUG_ASI
 //#define DEBUG_PCALL
+//#define DEBUG_PSTATE
 
 #ifdef DEBUG_MMU
 #define DPRINTF_MMU(fmt, ...)                                   \
@@ -31,6 +32,13 @@
     do { printf("ASI: " fmt , ## __VA_ARGS__); } while (0)
 #endif
 
+#ifdef DEBUG_PSTATE
+#define DPRINTF_PSTATE(fmt, ...)                                   \
+    do { printf("PSTATE: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF_PSTATE(fmt, ...) do {} while (0)
+#endif
+
 #ifdef TARGET_SPARC64
 #ifndef TARGET_ABI32
 #define AM_CHECK(env1) ((env1)->pstate & PS_AM)
@@ -3244,6 +3252,12 @@ static inline uint64_t *get_gregset(uint64_t pstate)
 {
     switch (pstate) {
     default:
+        DPRINTF_PSTATE("ERROR in get_gregset: active pstate bits=%lX %s %s %s",
+                pstate,
+                (pstate&PS_IG)?"IG":"",
+                (pstate&PS_MG)?"MG":"",
+                (pstate&PS_AG)?"AG":"" );
+        /* pass through to normal set of global registers */
     case 0:
         return env->bgregs;
     case PS_AG:
@@ -3269,12 +3283,18 @@ static inline void change_pstate(uint64_t new_pstate)
     new_pstate_regs = new_pstate & 0xc01;
 
     if (new_pstate_regs != pstate_regs) {
+        DPRINTF_PSTATE("change_pstate: switching regs old=%lX new=%lX\n",
+                       pstate_regs, new_pstate_regs);
         // Switch global register bank
         src = get_gregset(new_pstate_regs);
         dst = get_gregset(pstate_regs);
         memcpy32(dst, env->gregs);
         memcpy32(env->gregs, src);
     }
+    else {
+        DPRINTF_PSTATE("change_pstate: regs new=%lX (unchanged)\n",
+                       new_pstate_regs);
+    }
     env->pstate = new_pstate;
 }