Fixes the following piglit tests (for softpipe):

/spec/glsl-1.30/execution/built-in-functions/...
fs-roundeven-float
fs-roundeven-vec2
fs-roundeven-vec3
fs-roundeven-vec4
vs-roundeven-float
vs-roundeven-vec2
vs-roundeven-vec3
vs-roundeven-vec4

/spec/glsl-1.50/execution/built-in-functions/...
gs-roundeven-float
gs-roundeven-vec2
gs-roundeven-vec3
gs-roundeven-vec4

Signed-off-by: Lars Hamre <cheme...@gmail.com>

---

Note: someone with access will need to commit this
      after the review process.

 src/gallium/auxiliary/tgsi/tgsi_exec.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c 
b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index d483429..baf4a89 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -61,6 +61,7 @@
 #include "util/u_half.h"
 #include "util/u_memory.h"
 #include "util/u_math.h"
+#include "util/rounding.h"


 #define DEBUG_EXECUTION 0
@@ -543,10 +544,10 @@ static void
 micro_rnd(union tgsi_exec_channel *dst,
           const union tgsi_exec_channel *src)
 {
-   dst->f[0] = floorf(src->f[0] + 0.5f);
-   dst->f[1] = floorf(src->f[1] + 0.5f);
-   dst->f[2] = floorf(src->f[2] + 0.5f);
-   dst->f[3] = floorf(src->f[3] + 0.5f);
+   dst->f[0] = _mesa_roundevenf(src->f[0]);
+   dst->f[1] = _mesa_roundevenf(src->f[1]);
+   dst->f[2] = _mesa_roundevenf(src->f[2]);
+   dst->f[3] = _mesa_roundevenf(src->f[3]);
 }

 static void
--
2.5.5

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