From: Artem Belevich <tra@google.com>
Date: Thu, 25 Apr 2019 22:28:09 +0000 (+0000)
Subject: [CUDA] Implemented _[bi]mma* builtins.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=03f06f0ea6780e0bebb38015ad242e712db52f39;p=llvm

[CUDA] Implemented _[bi]mma* builtins.

These builtins provide access to the new integer and
sub-integer variants of MMA (matrix multiply-accumulate) instructions
provided by CUDA-10.x on sm_75 (AKA Turing) GPUs.

Also added a feature for PTX 6.4. While Clang/LLVM does not generate
any PTX instructions that need it, we still need to pass it through to
ptxas in order to be able to compile code that uses the new 'mma'
instruction as inline assembly (e.g used by NVIDIA's CUTLASS library
https://github.com/NVIDIA/cutlass/blob/master/cutlass/arch/mma.h#L101)

Differential Revision: https://reviews.llvm.org/D60279

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@359248 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/NVPTX/NVPTX.td b/lib/Target/NVPTX/NVPTX.td
index 9f5048b3182..1d947ef1ce6 100644
--- a/lib/Target/NVPTX/NVPTX.td
+++ b/lib/Target/NVPTX/NVPTX.td
@@ -75,6 +75,8 @@ def PTX61 : SubtargetFeature<"ptx61", "PTXVersion", "61",
                              "Use PTX version 6.1">;
 def PTX63 : SubtargetFeature<"ptx63", "PTXVersion", "63",
                              "Use PTX version 6.3">;
+def PTX64 : SubtargetFeature<"ptx64", "PTXVersion", "64",
+                             "Use PTX version 6.4">;
 
 //===----------------------------------------------------------------------===//
 // NVPTX supported processors.