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-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_conv.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_conv.c b/src/gallium/auxiliary/gallivm/lp_bld_conv.c
index 3abb19272b6..20aa2577830 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_conv.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_conv.c
@@ -178,6 +178,16 @@ lp_build_unsigned_norm_to_float(LLVMBuilderRef builder,
assert(dst_type.floating);
+ /* Special-case int8->float, though most cases could be handled
+ * this way:
+ */
+ if (src_width == 8) {
+ scale = 1.0/255.0;
+ res = LLVMBuildSIToFP(builder, src, vec_type, "");
+ res = LLVMBuildFMul(builder, res, lp_build_const_vec(dst_type, scale), "");
+ return res;
+ }
+
mantissa = lp_mantissa(dst_type);
n = MIN2(mantissa, src_width);