target/nios2: Hoist CPU_LOG_INT logging

Performing this early means that we can merge more cases
within the non-logging switch statement.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-34-richard.henderson@linaro.org>

target/nios2/helper.c

@@ -70,20 +70,64 @@ void nios2_cpu_do_interrupt(CPUState *cs)
     Nios2CPU *cpu = NIOS2_CPU(cs);
     CPUNios2State *env = &cpu->env;
 
+    if (qemu_loglevel_mask(CPU_LOG_INT)) {
+        const char *name = NULL;
+
+        switch (cs->exception_index) {
+        case EXCP_IRQ:
+            name = "interrupt";
+            break;
+        case EXCP_TLBD:
+            if (env->ctrl[CR_STATUS] & CR_STATUS_EH) {
+                name = "TLB MISS (double)";
+            } else {
+                name = "TLB MISS (fast)";
+            }
+            break;
+        case EXCP_TLBR:
+        case EXCP_TLBW:
+        case EXCP_TLBX:
+            name = "TLB PERM";
+            break;
+        case EXCP_SUPERA:
+        case EXCP_SUPERD:
+            name = "SUPERVISOR (address)";
+            break;
+        case EXCP_SUPERI:
+            name = "SUPERVISOR (insn)";
+            break;
+        case EXCP_ILLEGAL:
+            name = "ILLEGAL insn";
+            break;
+        case EXCP_TRAP:
+            name = "TRAP insn";
+            break;
+        case EXCP_BREAK:
+            name = "BREAK insn";
+            break;
+        case EXCP_SEMIHOST:
+            name = "SEMIHOST insn";
+            break;
+        }
+        if (name) {
+            qemu_log("%s at pc=0x%08x\n", name, env->pc);
+        } else {
+            qemu_log("Unknown exception %d at pc=0x%08x\n",
+                     cs->exception_index, env->pc);
+        }
+    }
+
     switch (cs->exception_index) {
     case EXCP_IRQ:
-        qemu_log_mask(CPU_LOG_INT, "interrupt at pc=%x\n", env->pc);
         do_iic_irq(cpu);
         break;
 
     case EXCP_TLBD:
         if ((env->ctrl[CR_STATUS] & CR_STATUS_EH) == 0) {
-            qemu_log_mask(CPU_LOG_INT, "TLB MISS (fast) at pc=%x\n", env->pc);
             env->ctrl[CR_TLBMISC] &= ~CR_TLBMISC_DBL;
             env->ctrl[CR_TLBMISC] |= CR_TLBMISC_WE;
             do_exception(cpu, cpu->fast_tlb_miss_addr, false);
         } else {
-            qemu_log_mask(CPU_LOG_INT, "TLB MISS (double) at pc=%x\n", env->pc);
             env->ctrl[CR_TLBMISC] |= CR_TLBMISC_DBL;
             do_exception(cpu, cpu->exception_addr, false);
         }
@@ -92,7 +136,6 @@ void nios2_cpu_do_interrupt(CPUState *cs)
     case EXCP_TLBR:
     case EXCP_TLBW:
     case EXCP_TLBX:
-        qemu_log_mask(CPU_LOG_INT, "TLB PERM at pc=%x\n", env->pc);
         if ((env->ctrl[CR_STATUS] & CR_STATUS_EH) == 0) {
             env->ctrl[CR_TLBMISC] |= CR_TLBMISC_WE;
         }
@@ -102,23 +145,16 @@ void nios2_cpu_do_interrupt(CPUState *cs)
     case EXCP_SUPERA:
     case EXCP_SUPERI:
     case EXCP_SUPERD:
-        qemu_log_mask(CPU_LOG_INT, "SUPERVISOR exception at pc=%x\n", env->pc);
-        do_exception(cpu, cpu->exception_addr, false);
-        break;
-
     case EXCP_ILLEGAL:
     case EXCP_TRAP:
-        qemu_log_mask(CPU_LOG_INT, "TRAP exception at pc=%x\n", env->pc);
         do_exception(cpu, cpu->exception_addr, false);
         break;
 
     case EXCP_BREAK:
-        qemu_log_mask(CPU_LOG_INT, "BREAK exception at pc=%x\n", env->pc);
         do_exception(cpu, cpu->exception_addr, true);
         break;
 
     case EXCP_SEMIHOST:
-        qemu_log_mask(CPU_LOG_INT, "BREAK semihosting at pc=%x\n", env->pc);
         env->pc += 4;
         do_nios2_semihosting(env);
         break;