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-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_conv.c19
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_pack.c18
2 files changed, 30 insertions, 7 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_conv.c b/src/gallium/auxiliary/gallivm/lp_bld_conv.c
index 5e7260dc21..44428f884d 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_conv.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_conv.c
@@ -330,15 +330,24 @@ lp_build_conv(LLVMBuilderRef builder,
/*
* Truncate or expand bit width
+ *
+ * No data conversion should happen here, although the sign bits are
+ * crucial to avoid bad clamping.
*/
- assert(!tmp_type.floating || tmp_type.width == dst_type.width);
+ {
+ struct lp_type new_type;
+
+ new_type = tmp_type;
+ new_type.sign = dst_type.sign;
+ new_type.width = dst_type.width;
+ new_type.length = dst_type.length;
- lp_build_resize(builder, tmp_type, dst_type, tmp, num_srcs, tmp, num_dsts);
+ lp_build_resize(builder, tmp_type, new_type, tmp, num_srcs, tmp, num_dsts);
- tmp_type.width = dst_type.width;
- tmp_type.length = dst_type.length;
- num_tmps = num_dsts;
+ tmp_type = new_type;
+ num_tmps = num_dsts;
+ }
/*
* Scale to the widest range
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_pack.c b/src/gallium/auxiliary/gallivm/lp_bld_pack.c
index dfe83b36c4..7748f8f099 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_pack.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_pack.c
@@ -430,7 +430,10 @@ lp_build_pack(LLVMBuilderRef builder,
/**
- * Truncate or expand the bitwidth
+ * Truncate or expand the bitwidth.
+ *
+ * NOTE: Getting the right sign flags is crucial here, as we employ some
+ * intrinsics that do saturation.
*/
void
lp_build_resize(LLVMBuilderRef builder,
@@ -442,7 +445,18 @@ lp_build_resize(LLVMBuilderRef builder,
LLVMValueRef tmp[LP_MAX_VECTOR_LENGTH];
unsigned i;
- assert(!src_type.floating || src_type.width == dst_type.width);
+ /*
+ * We don't support float <-> int conversion here. That must be done
+ * before/after calling this function.
+ */
+ assert(src_type.floating == dst_type.floating);
+
+ /*
+ * We don't support double <-> float conversion yet, although it could be
+ * added with little effort.
+ */
+ assert((!src_type.floating && !dst_type.floating) ||
+ src_type.width == dst_type.width);
/* We must not loose or gain channels. Only precision */
assert(src_type.length * num_srcs == dst_type.length * num_dsts);