Merge branch 'gallium_draw_llvm'

1 files changed, 484 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/draw/draw_llvm_translate.c b/src/gallium/auxiliary/draw/draw_llvm_translate.c
new file mode 100644
index 0000000000..b29ebdec3a
--- /dev/null
+++ b/src/gallium/auxiliary/draw/draw_llvm_translate.c
@@ -0,0 +1,484 @@
+#include "draw_private.h"
+#include "draw_context.h"
+
+#include "draw_llvm.h"
+
+#include "gallivm/lp_bld_arit.h"
+#include "gallivm/lp_bld_interp.h"
+#include "gallivm/lp_bld_struct.h"
+#include "gallivm/lp_bld_type.h"
+#include "gallivm/lp_bld_flow.h"
+#include "gallivm/lp_bld_debug.h"
+#include "gallivm/lp_bld_tgsi.h"
+#include "gallivm/lp_bld_printf.h"
+
+#include "util/u_memory.h"
+#include "pipe/p_state.h"
+
+
+#define DRAW_DBG 0
+
+static  LLVMValueRef
+from_64_float(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMDoubleType(), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   return LLVMBuildFPTrunc(builder, l, LLVMFloatType(), "");
+}
+
+static LLVMValueRef
+from_32_float(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMFloatType(), 0) , "");
+   return LLVMBuildLoad(builder, bc, "");
+}
+
+static INLINE LLVMValueRef
+from_8_uscaled(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, val, "");
+   return LLVMBuildUIToFP(builder, l, LLVMFloatType(), "");
+}
+
+static INLINE LLVMValueRef
+from_16_uscaled(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(16), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   return LLVMBuildUIToFP(builder, l, LLVMFloatType(), "");
+}
+
+static INLINE LLVMValueRef
+from_32_uscaled(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(32), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   return LLVMBuildUIToFP(builder, l, LLVMFloatType(), "");
+}
+
+static INLINE LLVMValueRef
+from_8_sscaled(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, val, "");
+   return LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+}
+
+static INLINE LLVMValueRef
+from_16_sscaled(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(16), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   return LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+}
+
+static INLINE LLVMValueRef
+from_32_sscaled(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(32), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   return LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+}
+
+
+static INLINE LLVMValueRef
+from_8_unorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, val, "");
+   LLVMValueRef uscaled = LLVMBuildUIToFP(builder, l, LLVMFloatType(), "");
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 255.), "");
+}
+
+static INLINE LLVMValueRef
+from_16_unorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(16), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   LLVMValueRef uscaled = LLVMBuildUIToFP(builder, l, LLVMFloatType(), "");
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 65535.), "");
+}
+
+static INLINE LLVMValueRef
+from_32_unorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(32), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   LLVMValueRef uscaled = LLVMBuildUIToFP(builder, l, LLVMFloatType(), "");
+
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 4294967295.), "");
+}
+
+static INLINE LLVMValueRef
+from_8_snorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, val, "");
+   LLVMValueRef uscaled = LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 127.0), "");
+}
+
+static INLINE LLVMValueRef
+from_16_snorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(16), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   LLVMValueRef uscaled = LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 32767.0f), "");
+}
+
+static INLINE LLVMValueRef
+from_32_snorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(32), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   LLVMValueRef uscaled = LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 2147483647.0), "");
+}
+
+static INLINE LLVMValueRef
+from_32_fixed(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef bc = LLVMBuildBitCast(builder, val,
+                                      LLVMPointerType(LLVMIntType(32), 0) , "");
+   LLVMValueRef l = LLVMBuildLoad(builder, bc, "");
+   LLVMValueRef uscaled = LLVMBuildSIToFP(builder, l, LLVMFloatType(), "");
+
+   return LLVMBuildFDiv(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 65536.0), "");
+}
+
+static LLVMValueRef
+to_64_float(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPExt(builder, l, LLVMDoubleType(), "");
+}
+
+static LLVMValueRef
+to_32_float(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   return LLVMBuildLoad(builder, fp, "");
+}
+
+static INLINE LLVMValueRef
+to_8_uscaled(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPToUI(builder, l, LLVMIntType(8), "");
+}
+
+static INLINE LLVMValueRef
+to_16_uscaled(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPToUI(builder, l, LLVMIntType(16), "");
+}
+
+static INLINE LLVMValueRef
+to_32_uscaled(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPToUI(builder, l, LLVMIntType(32), "");
+}
+
+static INLINE LLVMValueRef
+to_8_sscaled(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPToSI(builder, l, LLVMIntType(8), "");
+}
+
+static INLINE LLVMValueRef
+to_16_sscaled(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPToSI(builder, l, LLVMIntType(16), "");
+}
+
+static INLINE LLVMValueRef
+to_32_sscaled(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   return LLVMBuildFPToSI(builder, l, LLVMIntType(32), "");
+}
+
+static INLINE LLVMValueRef
+to_8_unorm(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   LLVMValueRef uscaled = LLVMBuildFPToUI(builder, l, LLVMIntType(8), "");
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 255.), "");
+}
+
+static INLINE LLVMValueRef
+to_16_unorm(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   LLVMValueRef uscaled = LLVMBuildFPToUI(builder, l, LLVMIntType(32), "");
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 65535.), "");
+}
+
+static INLINE LLVMValueRef
+to_32_unorm(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   LLVMValueRef uscaled = LLVMBuildFPToUI(builder, l, LLVMIntType(32), "");
+
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 4294967295.), "");
+}
+
+static INLINE LLVMValueRef
+to_8_snorm(LLVMBuilderRef builder, LLVMValueRef val)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, val, "");
+   LLVMValueRef uscaled = LLVMBuildFPToSI(builder, l, LLVMIntType(8), "");
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 127.0), "");
+}
+
+static INLINE LLVMValueRef
+to_16_snorm(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   LLVMValueRef uscaled = LLVMBuildFPToSI(builder, l, LLVMIntType(16), "");
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 32767.0f), "");
+}
+
+static INLINE LLVMValueRef
+to_32_snorm(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   LLVMValueRef uscaled = LLVMBuildFPToSI(builder, l, LLVMIntType(32), "");
+
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 2147483647.0), "");
+}
+
+static INLINE LLVMValueRef
+to_32_fixed(LLVMBuilderRef builder, LLVMValueRef fp)
+{
+   LLVMValueRef l = LLVMBuildLoad(builder, fp, "");
+   LLVMValueRef uscaled = LLVMBuildFPToSI(builder, l, LLVMIntType(32), "");
+
+   return LLVMBuildFMul(builder, uscaled,
+                        LLVMConstReal(LLVMFloatType(), 65536.0), "");
+}
+
+typedef LLVMValueRef (*from_func)(LLVMBuilderRef, LLVMValueRef);
+typedef  LLVMValueRef (*to_func)(LLVMBuilderRef, LLVMValueRef);
+
+/* so that underneath can avoid function calls which are prohibited
+ * for static initialization we need this conversion */
+enum ll_type {
+   LL_Double,
+   LL_Float,
+   LL_Int32,
+   LL_Int16,
+   LL_Int8
+};
+
+static INLINE LLVMTypeRef
+ll_type_to_llvm(enum ll_type type)
+{
+   switch (type) {
+   case LL_Double:
+      return LLVMDoubleType();
+   case LL_Float:
+      return LLVMFloatType();
+   case LL_Int32:
+      return LLVMInt32Type();
+   case LL_Int16:
+      return LLVMIntType(16);
+   case LL_Int8:
+      return LLVMIntType(8);
+   }
+   return LLVMIntType(8);
+}
+
+static INLINE int
+ll_type_size(enum ll_type type)
+{
+   switch (type) {
+   case LL_Double:
+      return 8;
+   case LL_Float:
+      return 4;
+   case LL_Int32:
+      return 4;
+   case LL_Int16:
+      return 2;
+   case LL_Int8:
+      return 1;
+   }
+   return 1;
+}
+
+struct draw_llvm_translate {
+   int format;
+   from_func from;
+   to_func to;
+   enum ll_type type;
+   int num_components;
+} translates[] =
+{
+   {PIPE_FORMAT_R64_FLOAT,          from_64_float, to_64_float, LL_Double, 1},
+   {PIPE_FORMAT_R64G64_FLOAT,       from_64_float, to_64_float, LL_Double, 2},
+   {PIPE_FORMAT_R64G64B64_FLOAT,    from_64_float, to_64_float, LL_Double, 3},
+   {PIPE_FORMAT_R64G64B64A64_FLOAT, from_64_float, to_64_float, LL_Double, 4},
+   {PIPE_FORMAT_R32_FLOAT,          from_32_float, to_32_float, LL_Float, 1},
+   {PIPE_FORMAT_R32G32_FLOAT,       from_32_float, to_32_float, LL_Float, 2},
+   {PIPE_FORMAT_R32G32B32_FLOAT,    from_32_float, to_32_float, LL_Float, 3},
+   {PIPE_FORMAT_R32G32B32A32_FLOAT, from_32_float, to_32_float, LL_Float, 4},
+
+   {PIPE_FORMAT_R32_UNORM,          from_32_unorm, to_32_unorm, LL_Int32, 1},
+   {PIPE_FORMAT_R32G32_UNORM,       from_32_unorm, to_32_unorm, LL_Int32, 2},
+   {PIPE_FORMAT_R32G32B32_UNORM,    from_32_unorm, to_32_unorm, LL_Int32, 3},
+   {PIPE_FORMAT_R32G32B32A32_UNORM, from_32_unorm, to_32_unorm, LL_Int32, 4},
+
+   {PIPE_FORMAT_R32_USCALED,          from_32_uscaled, to_32_uscaled, LL_Int32, 1},
+   {PIPE_FORMAT_R32G32_USCALED,       from_32_uscaled, to_32_uscaled, LL_Int32, 2},
+   {PIPE_FORMAT_R32G32B32_USCALED,    from_32_uscaled, to_32_uscaled, LL_Int32, 3},
+   {PIPE_FORMAT_R32G32B32A32_USCALED, from_32_uscaled, to_32_uscaled, LL_Int32, 4},
+
+   {PIPE_FORMAT_R32_SNORM,          from_32_snorm, to_32_snorm, LL_Int32, 1},
+   {PIPE_FORMAT_R32G32_SNORM,       from_32_snorm, to_32_snorm, LL_Int32, 2},
+   {PIPE_FORMAT_R32G32B32_SNORM,    from_32_snorm, to_32_snorm, LL_Int32, 3},
+   {PIPE_FORMAT_R32G32B32A32_SNORM, from_32_snorm, to_32_snorm, LL_Int32, 4},
+
+   {PIPE_FORMAT_R32_SSCALED,          from_32_sscaled, to_32_sscaled, LL_Int32, 1},
+   {PIPE_FORMAT_R32G32_SSCALED,       from_32_sscaled, to_32_sscaled, LL_Int32, 2},
+   {PIPE_FORMAT_R32G32B32_SSCALED,    from_32_sscaled, to_32_sscaled, LL_Int32, 3},
+   {PIPE_FORMAT_R32G32B32A32_SSCALED, from_32_sscaled, to_32_sscaled, LL_Int32, 4},
+
+   {PIPE_FORMAT_R16_UNORM,          from_16_unorm, to_16_unorm, LL_Int16, 1},
+   {PIPE_FORMAT_R16G16_UNORM,       from_16_unorm, to_16_unorm, LL_Int16, 2},
+   {PIPE_FORMAT_R16G16B16_UNORM,    from_16_unorm, to_16_unorm, LL_Int16, 3},
+   {PIPE_FORMAT_R16G16B16A16_UNORM, from_16_unorm, to_16_unorm, LL_Int16, 4},
+
+   {PIPE_FORMAT_R16_USCALED,          from_16_uscaled, to_16_uscaled, LL_Int16, 1},
+   {PIPE_FORMAT_R16G16_USCALED,       from_16_uscaled, to_16_uscaled, LL_Int16, 2},
+   {PIPE_FORMAT_R16G16B16_USCALED,    from_16_uscaled, to_16_uscaled, LL_Int16, 3},
+   {PIPE_FORMAT_R16G16B16A16_USCALED, from_16_uscaled, to_16_uscaled, LL_Int16, 4},
+
+   {PIPE_FORMAT_R16_SNORM,          from_16_snorm, to_16_snorm, LL_Int16, 1},
+   {PIPE_FORMAT_R16G16_SNORM,       from_16_snorm, to_16_snorm, LL_Int16, 2},
+   {PIPE_FORMAT_R16G16B16_SNORM,    from_16_snorm, to_16_snorm, LL_Int16, 3},
+   {PIPE_FORMAT_R16G16B16A16_SNORM, from_16_snorm, to_16_snorm, LL_Int16, 4},
+
+   {PIPE_FORMAT_R16_SSCALED,          from_16_sscaled, to_16_sscaled, LL_Int16, 1},
+   {PIPE_FORMAT_R16G16_SSCALED,       from_16_sscaled, to_16_sscaled, LL_Int16, 2},
+   {PIPE_FORMAT_R16G16B16_SSCALED,    from_16_sscaled, to_16_sscaled, LL_Int16, 3},
+   {PIPE_FORMAT_R16G16B16A16_SSCALED, from_16_sscaled, to_16_sscaled, LL_Int16, 4},
+
+   {PIPE_FORMAT_R8_UNORM,       from_8_unorm, to_8_unorm, LL_Int8, 1},
+   {PIPE_FORMAT_R8G8_UNORM,     from_8_unorm, to_8_unorm, LL_Int8, 2},
+   {PIPE_FORMAT_R8G8B8_UNORM,   from_8_unorm, to_8_unorm, LL_Int8, 3},
+   {PIPE_FORMAT_R8G8B8A8_UNORM, from_8_unorm, to_8_unorm, LL_Int8, 4},
+
+   {PIPE_FORMAT_R8_USCALED,       from_8_uscaled, to_8_uscaled, LL_Int8, 1},
+   {PIPE_FORMAT_R8G8_USCALED,     from_8_uscaled, to_8_uscaled, LL_Int8, 2},
+   {PIPE_FORMAT_R8G8B8_USCALED,   from_8_uscaled, to_8_uscaled, LL_Int8, 3},
+   {PIPE_FORMAT_R8G8B8A8_USCALED, from_8_uscaled, to_8_uscaled, LL_Int8, 4},
+
+   {PIPE_FORMAT_R8_SNORM,       from_8_snorm, to_8_snorm, LL_Int8, 1},
+   {PIPE_FORMAT_R8G8_SNORM,     from_8_snorm, to_8_snorm, LL_Int8, 2},
+   {PIPE_FORMAT_R8G8B8_SNORM,   from_8_snorm, to_8_snorm, LL_Int8, 3},
+   {PIPE_FORMAT_R8G8B8A8_SNORM, from_8_snorm, to_8_snorm, LL_Int8, 4},
+
+   {PIPE_FORMAT_R8_SSCALED,       from_8_sscaled, to_8_sscaled, LL_Int8, 1},
+   {PIPE_FORMAT_R8G8_SSCALED,     from_8_sscaled, to_8_sscaled, LL_Int8, 2},
+   {PIPE_FORMAT_R8G8B8_SSCALED,   from_8_sscaled, to_8_sscaled, LL_Int8, 3},
+   {PIPE_FORMAT_R8G8B8A8_SSCALED, from_8_sscaled, to_8_sscaled, LL_Int8, 4},
+
+   {PIPE_FORMAT_R32_FIXED,          from_32_fixed, to_32_fixed, LL_Int32, 1},
+   {PIPE_FORMAT_R32G32_FIXED,       from_32_fixed, to_32_fixed, LL_Int32, 2},
+   {PIPE_FORMAT_R32G32B32_FIXED,    from_32_fixed, to_32_fixed, LL_Int32, 3},
+   {PIPE_FORMAT_R32G32B32A32_FIXED, from_32_fixed, to_32_fixed, LL_Int32, 4},
+
+   {PIPE_FORMAT_A8R8G8B8_UNORM, from_8_unorm, to_8_unorm, LL_Int8, 4},
+   {PIPE_FORMAT_B8G8R8A8_UNORM, from_8_unorm, to_8_unorm, LL_Int8, 4},
+};
+
+
+static LLVMValueRef
+fetch(LLVMBuilderRef builder,
+      LLVMValueRef ptr, int val_size, int nr_components,
+      from_func func)
+{
+   int i;
+   int offset = 0;
+   LLVMValueRef res = LLVMConstNull(
+      LLVMVectorType(LLVMFloatType(), 4));
+   LLVMValueRef defaults[4];
+
+   defaults[0] = LLVMConstReal(LLVMFloatType(), 0);
+   defaults[1] = LLVMConstReal(LLVMFloatType(), 0);
+   defaults[2] = LLVMConstReal(LLVMFloatType(), 0);
+   defaults[3] = LLVMConstReal(LLVMFloatType(), 1);
+
+   for (i = 0; i < nr_components; ++i) {
+      LLVMValueRef src_index = LLVMConstInt(LLVMInt32Type(), offset, 0);
+      LLVMValueRef dst_index = LLVMConstInt(LLVMInt32Type(), i, 0);
+      LLVMValueRef src_tmp;
+      LLVMValueRef component;
+
+      src_tmp = LLVMBuildGEP(builder, ptr, &src_index, 1, "src_tmp");
+
+      /* convert src_tmp to float */
+      component = func(builder, src_tmp);
+
+      /* vec.comp = component */
+      res = LLVMBuildInsertElement(builder,
+                                   res,
+                                   component,
+                                   dst_index, "");
+      offset += val_size;
+   }
+   for (; i < 4; ++i) {
+      LLVMValueRef dst_index = LLVMConstInt(LLVMInt32Type(), i, 0);
+      res = LLVMBuildInsertElement(builder,
+                                   res,
+                                   defaults[i],
+                                   dst_index, "");
+   }
+   return res;
+}
+
+
+LLVMValueRef
+draw_llvm_translate_from(LLVMBuilderRef builder,
+                         LLVMValueRef vbuffer,
+                         enum pipe_format from_format)
+{
+   int i;
+   for (i = 0; i < Elements(translates); ++i) {
+      if (translates[i].format == from_format) {
+         /*LLVMTypeRef type = ll_type_to_llvm(translates[i].type);*/
+         return fetch(builder,
+                      vbuffer,
+                      ll_type_size(translates[i].type),
+                      translates[i].num_components,
+                      translates[i].from);
+      }
+   }
+   return LLVMGetUndef(LLVMVectorType(LLVMFloatType(), 4));
+}