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authorJosé Fonseca <jfonseca@vmware.com>2009-10-22 18:28:37 +0100
committerJosé Fonseca <jfonseca@vmware.com>2009-10-22 19:12:13 +0100
commit4458695bdafb13eba639d986e2f20953f0f7445c (patch)
treed8d6314f730b0ec963a79861cb3db98eaf0552be
parent421507de06bd42a322c5864d887e67e385eb458c (diff)
llvmpipe: Utility function to double the bit width of a type.
-rw-r--r--src/gallium/drivers/llvmpipe/lp_bld_type.c29
-rw-r--r--src/gallium/drivers/llvmpipe/lp_bld_type.h4
2 files changed, 28 insertions, 5 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_type.c b/src/gallium/drivers/llvmpipe/lp_bld_type.c
index 606243d6c5..1320a26721 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_type.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_type.c
@@ -160,12 +160,31 @@ lp_build_int_vec_type(struct lp_type type)
struct lp_type
lp_int_type(struct lp_type type)
{
- struct lp_type int_type;
+ struct lp_type res_type;
- memset(&int_type, 0, sizeof int_type);
- int_type.width = type.width;
- int_type.length = type.length;
- return int_type;
+ memset(&res_type, 0, sizeof res_type);
+ res_type.width = type.width;
+ res_type.length = type.length;
+
+ return res_type;
+}
+
+
+/**
+ * Return the type with twice the bit width (hence half the number of elements).
+ */
+struct lp_type
+lp_wider_type(struct lp_type type)
+{
+ struct lp_type res_type;
+
+ memcpy(&res_type, &type, sizeof res_type);
+ res_type.width *= 2;
+ res_type.length /= 2;
+
+ assert(res_type.length);
+
+ return res_type;
}
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_type.h b/src/gallium/drivers/llvmpipe/lp_bld_type.h
index ee5ca3483c..46c298fa20 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_type.h
+++ b/src/gallium/drivers/llvmpipe/lp_bld_type.h
@@ -166,6 +166,10 @@ struct lp_type
lp_int_type(struct lp_type type);
+struct lp_type
+lp_wider_type(struct lp_type type);
+
+
void
lp_build_context_init(struct lp_build_context *bld,
LLVMBuilderRef builder,