Mesa (master): i965: Use ldexpf() in VF float test set up.

[Matt Turner]

Module: Mesa
Branch: master
Commit: f450030f66036e560be87067c0a0cef33cd7b5ed
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f450030f66036e560be87067c0a0cef33cd7b5ed

Author: Matt Turner <mattst88 at gmail.com>
Date:   Wed Nov  4 14:31:59 2015 -0800

i965: Use ldexpf() in VF float test set up.

Reviewed-by: Iago Toral Quiroga <itoral at igalia.com>

---

 src/mesa/drivers/dri/i965/test_vf_float_conversions.cpp |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/test_vf_float_conversions.cpp b/src/mesa/drivers/dri/i965/test_vf_float_conversions.cpp
index 6a8bcea..7f03425 100644
--- a/src/mesa/drivers/dri/i965/test_vf_float_conversions.cpp
+++ b/src/mesa/drivers/dri/i965/test_vf_float_conversions.cpp
@@ -40,15 +40,10 @@ void vf_float_conversion_test::SetUp() {
       int ebits = (vf >> 4) & 0x7;
       int mbits = vf & 0xf;
 
-      int e = ebits - 3;
+      float x = 1.0f + mbits / 16.0f;
+      int exp = ebits - 3;
 
-      float value = 1.0f;
-
-      value += mbits / 16.0f;
-
-      value *= exp2f(e);
-
-      vf_to_float[vf] = value;
+      vf_to_float[vf] = ldexpf(x, exp);
    }
 }