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radeonsi/ac: move get thread id to shared code.

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radv will use this.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2017-02-02 09:35:40 +10:00
parent 1c5c268a8a
commit c5f0a56aeb
3 changed files with 55 additions and 56 deletions
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48
src/amd/common/ac_llvm_util.c
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@@ -168,6 +168,9 @@ ac_llvm_context_init(struct ac_llvm_context *ctx, LLVMContextRef context)
ctx->v4f32 = LLVMVectorType(ctx->f32, 4);
ctx->v16i8 = LLVMVectorType(ctx->i8, 16);
ctx->range_md_kind = LLVMGetMDKindIDInContext(ctx->context,
"range", 5);
ctx->invariant_load_md_kind = LLVMGetMDKindIDInContext(ctx->context,
"invariant.load", 14);
@@ -803,3 +806,48 @@ ac_build_buffer_load(struct ac_llvm_context *ctx,
ARRAY_SIZE(args), AC_FUNC_ATTR_READONLY);
}
}
/**
* Set range metadata on an instruction. This can only be used on load and
* call instructions. If you know an instruction can only produce the values
* 0, 1, 2, you would do set_range_metadata(value, 0, 3);
* \p lo is the minimum value inclusive.
* \p hi is the maximum value exclusive.
*/
static void set_range_metadata(struct ac_llvm_context *ctx,
LLVMValueRef value, unsigned lo, unsigned hi)
{
LLVMValueRef range_md, md_args[2];
LLVMTypeRef type = LLVMTypeOf(value);
LLVMContextRef context = LLVMGetTypeContext(type);
md_args[0] = LLVMConstInt(type, lo, false);
md_args[1] = LLVMConstInt(type, hi, false);
range_md = LLVMMDNodeInContext(context, md_args, 2);
LLVMSetMetadata(value, ctx->range_md_kind, range_md);
}
LLVMValueRef
ac_get_thread_id(struct ac_llvm_context *ctx)
{
LLVMValueRef tid;
if (HAVE_LLVM < 0x0308) {
tid = ac_emit_llvm_intrinsic(ctx, "llvm.SI.tid",
ctx->i32,
NULL, 0, AC_FUNC_ATTR_READNONE);
} else {
LLVMValueRef tid_args[2];
tid_args[0] = LLVMConstInt(ctx->i32, 0xffffffff, false);
tid_args[1] = LLVMConstInt(ctx->i32, 0, false);
tid_args[1] = ac_emit_llvm_intrinsic(ctx,
"llvm.amdgcn.mbcnt.lo", ctx->i32,
tid_args, 2, AC_FUNC_ATTR_READNONE);
tid = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.mbcnt.hi",
ctx->i32, tid_args,
2, AC_FUNC_ATTR_READNONE);
}
set_range_metadata(ctx, tid, 0, 64);
return tid;
}