From: Nicolai Hähnle <nicolai.haeh...@amd.com>
This will allow it to be reused for RESQ.
---
src/gallium/drivers/radeonsi/si_shader.c | 55 ++++++++++++++++++++------------
1 file changed, 35 insertions(+), 20 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_shader.c
b/src/gallium/drivers/radeonsi/si_shader.c
index 003fe68..a4352f1 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2656,6 +2656,40 @@ static void si_llvm_return_fs_outputs(struct
lp_build_tgsi_context *bld_base)
ctx->return_value = ret;
}
+/**
+ * Given a v8i32 resource descriptor for a buffer, extract the size of the
+ * buffer in number of elements and return it as an i32.
+ */
+static LLVMValueRef get_buffer_size(
+ struct lp_build_tgsi_context *bld_base,
+ LLVMValueRef descriptor)
+{
+ struct si_shader_context *ctx = si_shader_context(bld_base);
+ struct gallivm_state *gallivm = bld_base->base.gallivm;
+ LLVMBuilderRef builder = gallivm->builder;
+ LLVMValueRef size =
+ LLVMBuildExtractElement(builder, descriptor,
+ lp_build_const_int32(gallivm, 6), "");
+
+ if (ctx->screen->b.chip_class >= VI) {
+ /* On VI, the descriptor contains the size in bytes,
+ * but TXQ must return the size in elements.
+ * The stride is always non-zero for resources using TXQ.
+ */
+ LLVMValueRef stride =
+ LLVMBuildExtractElement(builder, descriptor,
+ lp_build_const_int32(gallivm,
5), "");
+ stride = LLVMBuildLShr(builder, stride,
+ lp_build_const_int32(gallivm, 16), "");
+ stride = LLVMBuildAnd(builder, stride,
+ lp_build_const_int32(gallivm, 0x3FFF),
"");
+
+ size = LLVMBuildUDiv(builder, size, stride, "");
+ }
+
+ return size;
+}
+
static void build_tex_intrinsic(const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data);
@@ -2836,26 +2870,7 @@ static void tex_fetch_args(
if (target == TGSI_TEXTURE_BUFFER) {
/* Read the size from the buffer descriptor directly. */
LLVMValueRef res = LLVMBuildBitCast(builder, res_ptr,
ctx->v8i32, "");
- LLVMValueRef size = LLVMBuildExtractElement(builder,
res,
-
lp_build_const_int32(gallivm, 6), "");
-
- if (ctx->screen->b.chip_class >= VI) {
- /* On VI, the descriptor contains the size in
bytes,
- * but TXQ must return the size in elements.
- * The stride is always non-zero for resources
using TXQ.
- */
- LLVMValueRef stride =
- LLVMBuildExtractElement(builder, res,
-
lp_build_const_int32(gallivm, 5), "");
- stride = LLVMBuildLShr(builder, stride,
-
lp_build_const_int32(gallivm, 16), "");
- stride = LLVMBuildAnd(builder, stride,
-
lp_build_const_int32(gallivm, 0x3FFF), "");
-
- size = LLVMBuildUDiv(builder, size, stride, "");
- }
-
- emit_data->args[0] = size;
+ emit_data->args[0] = get_buffer_size(bld_base, res);
return;
}
--
2.5.0
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