[PATCH v3 06/33] target/alpha: Use a static table in alpha_exception_name()

["Philippe Mathieu-Daudé" <philmd@oss.qualcomm.com>]

Replace the switch statement with a static lookup table.

With '-d int', unlisted exception codes are now logged as
"unknown" instead of "<unknown>".

Suggested-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
---
 target/alpha/helper.c | 55 ++++++++++++-------------------------------
 1 file changed, 15 insertions(+), 40 deletions(-)

diff --git a/target/alpha/helper.c b/target/alpha/helper.c
index cedb0006892..84997ef3a99 100644
--- a/target/alpha/helper.c
+++ b/target/alpha/helper.c
@@ -19,6 +19,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/log.h"
+#include "qemu/cutils.h"
 #include "cpu.h"
 #include "exec/cputlb.h"
 #include "exec/page-protection.h"
@@ -37,47 +38,21 @@
 
 const char *alpha_exception_name(int excp)
 {
-    const char *name;
+    static const char * const excp_names[] = {
+        [EXCP_RESET]            = "reset",
+        [EXCP_MCHK]             = "mchk",
+        [EXCP_SMP_INTERRUPT]    = "smp_interrupt",
+        [EXCP_CLK_INTERRUPT]    = "clk_interrupt",
+        [EXCP_DEV_INTERRUPT]    = "dev_interrupt",
+        [EXCP_MMFAULT]          = "mmfault",
+        [EXCP_UNALIGN]          = "unalign",
+        [EXCP_OPCDEC]           = "opcdec",
+        [EXCP_ARITH]            = "arith",
+        [EXCP_FEN]              = "fen",
+        [EXCP_CALL_PAL]         = "call_pal",
+    };
 
-    switch (excp) {
-    case EXCP_RESET:
-        name = "reset";
-        break;
-    case EXCP_MCHK:
-        name = "mchk";
-        break;
-    case EXCP_SMP_INTERRUPT:
-        name = "smp_interrupt";
-        break;
-    case EXCP_CLK_INTERRUPT:
-        name = "clk_interrupt";
-        break;
-    case EXCP_DEV_INTERRUPT:
-        name = "dev_interrupt";
-        break;
-    case EXCP_MMFAULT:
-        name = "mmfault";
-        break;
-    case EXCP_UNALIGN:
-        name = "unalign";
-        break;
-    case EXCP_OPCDEC:
-        name = "opcdec";
-        break;
-    case EXCP_ARITH:
-        name = "arith";
-        break;
-    case EXCP_FEN:
-        name = "fen";
-        break;
-    case EXCP_CALL_PAL:
-        name = "call_pal";
-        break;
-    default:
-        name = "<unknown>";
-        break;
-    }
-    return name;
+    return STR_ARRAY_ELEM_OR_NULL(excp_names, excp) ?: "unknown";
 }
 
 uint64_t cpu_alpha_load_fpcr(CPUAlphaState *env)
-- 
2.55.0