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[2/2] hw/scsi/lsi53c895a: Use deposit32 rather than handcoded shift/mask

Message ID 1377274593-8797-3-git-send-email-peter.maydell@linaro.org
State Accepted
Commit 57ffcc4c83331cb4b2639a866b6ecc11b3e7092c
Headers show

Commit Message

Peter Maydell Aug. 23, 2013, 4:16 p.m. UTC 
Use deposit32() rather than handcoded shifts/masks to update the
scratch registers. This is cleaner and incidentally avoids a clang
sanitizer complaint ("runtime error: left shift of 255 by 24 places
cannot be represented in type 'int'").

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/scsi/lsi53c895a.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
index 333c62f..9c64e7c 100644
--- a/hw/scsi/lsi53c895a.c
+++ b/hw/scsi/lsi53c895a.c
@@ -1870,8 +1870,7 @@  static void lsi_reg_writeb(LSIState *s, int offset, uint8_t val)
             int shift;
             n = (offset - 0x58) >> 2;
             shift = (offset & 3) * 8;
-            s->scratch[n] &= ~(0xff << shift);
-            s->scratch[n] |= (val & 0xff) << shift;
+            s->scratch[n] = deposit32(s->scratch[n], shift, 8, val);
         } else {
             BADF("Unhandled writeb 0x%x = 0x%x\n", offset, val);
         }