[PATCH v5 2/3] display/blizzard: use extract16() for fix clang analyzer warning in blizzard_draw_line16_32()

[Chen Qun]

Clang static code analyzer show warning:
  hw/display/blizzard.c:940:9: warning: Value stored to 'data' is never read
        data >>= 5;
        ^        ~
Reported-by: Euler Robot <address@hidden>
Signed-off-by: Chen Qun <address@hidden>
---
Cc: Andrzej Zaborowski <address@hidden>
Cc: Peter Maydell <address@hidden>

v1->v2: Use extract16() function instead of bit operation(Base on Laurent's 
comments).
---
 hw/display/blizzard.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/hw/display/blizzard.c b/hw/display/blizzard.c
index 359e399c2a..105241577d 100644
--- a/hw/display/blizzard.c
+++ b/hw/display/blizzard.c
@@ -19,6 +19,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/bitops.h"
 #include "ui/console.h"
 #include "hw/display/blizzard.h"
 #include "ui/pixel_ops.h"
@@ -932,12 +933,9 @@ static void blizzard_draw_line16_32(uint32_t *dest,
     const uint16_t *end = (const void *) src + width;
     while (src < end) {
         data = *src ++;
-        b = (data & 0x1f) << 3;
-        data >>= 5;
-        g = (data & 0x3f) << 2;
-        data >>= 6;
-        r = (data & 0x1f) << 3;
-        data >>= 5;
+        b = extract16(data, 0, 5) << 3;
+        g = extract16(data, 5, 6) << 2;
+        r = extract16(data, 11, 5) << 3;
         *dest++ = rgb_to_pixel32(r, g, b);
     }
 }
-- 
2.23.0