diff options
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 55 |
1 files changed, 35 insertions, 20 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index c95e2fe2c61..aefb2e0cbd8 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; } |