From: Christophe Lyon <christophe.lyon@st.com>
Date: Tue, 15 Feb 2011 13:44:44 +0000 (+0000)
Subject: target-arm: fix unsigned 64 bit right shifts.
X-Git-Tag: qemu-xen-4.3.0-rc1~3389
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=51e3930fc7ae8d3cff1ff0ecfdd63403b4c20f36;p=qemu-upstream-4.4-testing.git

target-arm: fix unsigned 64 bit right shifts.

Fix range of shift amounts which always give 0 as result.

Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---

diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c
index 52ef994d2..c97aa7dbd 100644
--- a/target-arm/neon_helper.c
+++ b/target-arm/neon_helper.c
@@ -639,7 +639,7 @@ uint32_t HELPER(neon_rshl_u32)(uint32_t val, uint32_t shiftop)
 uint64_t HELPER(neon_rshl_u64)(uint64_t val, uint64_t shiftop)
 {
     int8_t shift = (uint8_t)shiftop;
-    if (shift >= 64 || shift < 64) {
+    if (shift >= 64 || shift < -64) {
         val = 0;
     } else if (shift == -64) {
         /* Rounding a 1-bit result just preserves that bit.  */