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ac: add support for 16bit load_push_constant

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Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Daniel Schürmann 2018-07-16 20:45:24 +02:00 • committed by Bas Nieuwenhuizen
parent b722b29f10
commit 4d0b02bb5a
1 changed files with 20 additions and 0 deletions
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20
src/amd/common/ac_nir_to_llvm.c
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@ -1395,6 +1395,26 @@ static LLVMValueRef visit_load_push_constant(struct ac_nir_context *ctx,
get_src(ctx, instr->src[0]), "");
ptr = ac_build_gep0(&ctx->ac, ctx->abi->push_constants, addr);
if (instr->dest.ssa.bit_size == 16) {
unsigned load_dwords = instr->dest.ssa.num_components / 2 + 1;
LLVMTypeRef vec_type = LLVMVectorType(LLVMInt16Type(), 2 * load_dwords);
ptr = ac_cast_ptr(&ctx->ac, ptr, vec_type);
LLVMValueRef res = LLVMBuildLoad(ctx->ac.builder, ptr, "");
res = LLVMBuildBitCast(ctx->ac.builder, res, vec_type, "");
LLVMValueRef cond = LLVMBuildLShr(ctx->ac.builder, addr, ctx->ac.i32_1, "");
cond = LLVMBuildTrunc(ctx->ac.builder, cond, LLVMInt1Type(), "");
LLVMValueRef mask[] = { LLVMConstInt(ctx->ac.i32, 0, false), LLVMConstInt(ctx->ac.i32, 1, false),
LLVMConstInt(ctx->ac.i32, 2, false), LLVMConstInt(ctx->ac.i32, 3, false),
LLVMConstInt(ctx->ac.i32, 4, false)};
LLVMValueRef swizzle_aligned = LLVMConstVector(&mask[0], instr->dest.ssa.num_components);
LLVMValueRef swizzle_unaligned = LLVMConstVector(&mask[1], instr->dest.ssa.num_components);
LLVMValueRef shuffle_aligned = LLVMBuildShuffleVector(ctx->ac.builder, res, res, swizzle_aligned, "");
LLVMValueRef shuffle_unaligned = LLVMBuildShuffleVector(ctx->ac.builder, res, res, swizzle_unaligned, "");
res = LLVMBuildSelect(ctx->ac.builder, cond, shuffle_unaligned, shuffle_aligned, "");
return LLVMBuildBitCast(ctx->ac.builder, res, get_def_type(ctx, &instr->dest.ssa), "");
}
ptr = ac_cast_ptr(&ctx->ac, ptr, get_def_type(ctx, &instr->dest.ssa));
return LLVMBuildLoad(ctx->ac.builder, ptr, "");