diff options
Diffstat (limited to 'src/amd/common/ac_llvm_util.c')
| -rw-r--r-- | src/amd/common/ac_llvm_util.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/amd/common/ac_llvm_util.c b/src/amd/common/ac_llvm_util.c index bc309bd81c4..4c114585292 100644 --- a/src/amd/common/ac_llvm_util.c +++ b/src/amd/common/ac_llvm_util.c @@ -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; +} |