Hi Tom
Am 19.04.2016 um 19:52 schrieb Tom Stellard:
> We're trying to move to more of the new style intrinsics with include
> the correct target name, and map directly to ISA instructions.
>
> v2:
> - Only do this with LLVM 3.8 and newer.
> ---
> src/gallium/drivers/radeonsi/si_shader.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/src/gallium/drivers/radeonsi/si_shader.c
> b/src/gallium/drivers/radeonsi/si_shader.c
> index b4f2a42..2a747f9 100644
> --- a/src/gallium/drivers/radeonsi/si_shader.c
> +++ b/src/gallium/drivers/radeonsi/si_shader.c
> @@ -1139,8 +1139,23 @@ static void set_range_metadata(LLVMValueRef value,
> unsigned lo, unsigned hi)
> static LLVMValueRef get_thread_id(struct si_shader_context *ctx)
> {
> struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
> - LLVMValueRef tid = lp_build_intrinsic(gallivm->builder, "llvm.SI.tid",
> + LLVMValueRef tid;
> +
> + if (HAVE_LLVM < 0x0308) {
> + tid = lp_build_intrinsic(gallivm->builder, "llvm.SI.tid",
> ctx->i32, NULL, 0, LLVMReadNoneAttribute);
Is there a reason not to use the helper from patch 1?
Michael
> + } else {
> + LLVMValueRef tid_args[2];
> + tid_args[0] = lp_build_const_int32(gallivm, 0xffffffff);
> + tid_args[1] = lp_build_const_int32(gallivm, 0);
> + tid_args[1] = lp_build_intrinsic(gallivm->builder,
> + "llvm.amdgcn.mbcnt.lo", ctx->i32,
> + tid_args, 2, LLVMReadNoneAttribute);
> +
> + tid = lp_build_intrinsic(gallivm->builder,
> + "llvm.amdgcn.mbcnt.hi", ctx->i32,
> + tid_args, 2, LLVMReadNoneAttribute);
> + }
> set_range_metadata(tid, 0, 64);
> return tid;
> }
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