From: Christophe LYON <christophe.lyon@st.com>
Date: Wed, 19 Oct 2011 16:14:05 +0000 (+0000)
Subject: rsqrte_f32: No need to copy sign bit.
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=26cc6abf61cc2bf68eaeb89b1497c12330e6b73c;p=qemu.git

rsqrte_f32: No need to copy sign bit.

Indeed, the result is known to be always positive.

Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---

diff --git a/target-arm/helper.c b/target-arm/helper.c
index e2428eb7b2..17ef98b687 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -3039,8 +3039,7 @@ float32 HELPER(rsqrte_f32)(float32 a, CPUState *env)
 
     val64 = float64_val(f64);
 
-    val = ((val64 >> 63)  & 0x80000000)
-        | ((result_exp & 0xff) << 23)
+    val = ((result_exp & 0xff) << 23)
         | ((val64 >> 29)  & 0x7fffff);
     return make_float32(val);
 }