From 559e5b0408c3fda2aa05d477f2738746cb9d0d5d Mon Sep 17 00:00:00 2001 From: Timothy Arceri Date: Tue, 22 Jan 2019 12:29:34 +1100 Subject: [PATCH] ac/nir_to_llvm: add bindless support for uniform handles MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Reviewed-by: Marek Olšák --- src/amd/common/ac_nir_to_llvm.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c index ddf18c4c572..686e8b4935e 100644 --- a/src/amd/common/ac_nir_to_llvm.c +++ b/src/amd/common/ac_nir_to_llvm.c @@ -3303,6 +3303,27 @@ static void visit_intrinsic(struct ac_nir_context *ctx, } } +static LLVMValueRef get_bindless_index_from_uniform(struct ac_nir_context *ctx, + unsigned base_index, + unsigned constant_index, + LLVMValueRef dynamic_index) +{ + LLVMValueRef offset = LLVMConstInt(ctx->ac.i32, base_index * 4, 0); + LLVMValueRef index = LLVMBuildAdd(ctx->ac.builder, dynamic_index, + LLVMConstInt(ctx->ac.i32, constant_index, 0), ""); + + /* Bindless uniforms are 64bit so multiple index by 8 */ + index = LLVMBuildMul(ctx->ac.builder, index, LLVMConstInt(ctx->ac.i32, 8, 0), ""); + offset = LLVMBuildAdd(ctx->ac.builder, offset, index, ""); + + LLVMValueRef ubo_index = ctx->abi->load_ubo(ctx->abi, ctx->ac.i32_0); + + LLVMValueRef ret = ac_build_buffer_load(&ctx->ac, ubo_index, 1, NULL, offset, + NULL, 0, false, false, true, true); + + return LLVMBuildBitCast(ctx->ac.builder, ret, ctx->ac.i32, ""); +} + static LLVMValueRef get_sampler_desc(struct ac_nir_context *ctx, nir_deref_instr *deref_instr, enum ac_descriptor_type desc_type, @@ -3353,8 +3374,15 @@ static LLVMValueRef get_sampler_desc(struct ac_nir_context *ctx, descriptor_set = deref_instr->var->data.descriptor_set; if (deref_instr->var->data.bindless) { + /* For now just assert on unhandled variable types */ + assert(deref_instr->var->data.mode == nir_var_uniform); + base_index = deref_instr->var->data.driver_location; bindless = true; + + index = index ? index : ctx->ac.i32_0; + index = get_bindless_index_from_uniform(ctx, base_index, + constant_index, index); } else base_index = deref_instr->var->data.binding; } -- 2.30.2