[Mesa-dev] [PATCH] gallivm: fix conversion for pure integer formats

[sroland at vmware.com]

From: Roland Scheidegger <sroland at vmware.com>

Since the idea is to just expand or shrink the bit width but not otherwise do
conversion we also need to adjust the sign bit according to src, otherwise
the conversion code will incorrectly clamp the values. (Since this only works
for casting to ordinary floats the norm and fixed bits should always be fine.)

This fixes the remaining piglit attribs GL3 failures.
---
 .../auxiliary/gallivm/lp_bld_format_aos_array.c    |    1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c b/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c
index 1eb9446..9642b9e 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c
@@ -150,6 +150,7 @@ lp_build_fetch_rgba_aos_array(struct gallivm_state *gallivm,
    if (pure_integer) {
       assert(dst_type.floating);
       tmp_type.floating = 0;
+      tmp_type.sign = src_type.sign;
    }
 
    /* Convert to correct format */
-- 
1.7.9.5