[Qemu-devel] [RISU v3 11/11] risu_reginfo_i386: rework --xfeatures value parsing

[Jan Bobek <jan.bobek@gmail.com>]

Have the --xfeatures option accept "sse", "avx" and "avx512" in
addition to a plain numerical value, purely for users' convenience.
Don't fail silently when an incorrect value is specified, to avoid
confusion.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Jan Bobek <jan.bobek@gmail.com>
---
 risu_reginfo_i386.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/risu_reginfo_i386.c b/risu_reginfo_i386.c
index 01ea179..194e0ad 100644
--- a/risu_reginfo_i386.c
+++ b/risu_reginfo_i386.c
@@ -53,8 +53,25 @@ const char * const arch_extra_help
 
 void process_arch_opt(int opt, const char *arg)
 {
+    char *endptr;
+
     assert(opt == FIRST_ARCH_OPT);
-    xfeatures = strtoull(arg, 0, 0);
+
+    if (!strcmp(arg, "sse")) {
+        xfeatures = XFEAT_X87 | XFEAT_SSE;
+    } else if (!strcmp(arg, "avx")) {
+        xfeatures = XFEAT_X87 | XFEAT_SSE | XFEAT_AVX;
+    } else if (!strcmp(arg, "avx512")) {
+        xfeatures = XFEAT_X87 | XFEAT_SSE | XFEAT_AVX | XFEAT_AVX512;
+    } else {
+        xfeatures = strtoull(arg, &endptr, 0);
+        if (*endptr) {
+            fprintf(stderr,
+                    "Unable to parse '%s' in '%s' into an xfeatures integer mask\n",
+                    endptr, arg);
+            exit(1);
+        }
+    }
 }
 
 const int reginfo_size(void)
-- 
2.20.1