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ac/nir_to_llvm: add bindless support for uniform handles 

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Timothy Arceri 2019-01-22 12:29:34 +11:00
parent f0ed59076f
commit 559e5b0408
1 changed files with 28 additions and 0 deletions
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28
src/amd/common/ac_nir_to_llvm.c
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@ -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;
}