From 501cad951b7d5e0bfd289790472793433bc03368 Mon Sep 17 00:00:00 2001
From: Michael Kuperstein <michael.m.kuperstein@intel.com>
Date: Tue, 30 Jun 2015 08:49:35 +0000
Subject: [PATCH] [X86] Add FXSR intrinsics

Add intrinsics for the FXSR instructions (FXSAVE/FXSAVE64/FXRSTOR/FXRSTOR64)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241049 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/IR/IntrinsicsX86.td         | 13 ++++++++++
 lib/Target/X86/X86InstrFPStack.td        | 16 ++++++------
 test/CodeGen/X86/system-intrinsics-64.ll | 33 ++++++++++++++++++++++++
 test/CodeGen/X86/system-intrinsics.ll    | 17 ++++++++++++
 4 files changed, 71 insertions(+), 8 deletions(-)
 create mode 100644 test/CodeGen/X86/system-intrinsics-64.ll
 create mode 100644 test/CodeGen/X86/system-intrinsics.ll

diff --git a/include/llvm/IR/IntrinsicsX86.td b/include/llvm/IR/IntrinsicsX86.td
index 80446d35a4b..79e57a6d565 100644
--- a/include/llvm/IR/IntrinsicsX86.td
+++ b/include/llvm/IR/IntrinsicsX86.td
@@ -3514,6 +3514,19 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[], [llvm_i64_ty]>;
 }
 
+//===----------------------------------------------------------------------===//
+// FXSR
+let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
+  def int_x86_fxrstor : GCCBuiltin<"__builtin_ia32_fxrstor">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+  def int_x86_fxrstor64 : GCCBuiltin<"__builtin_ia32_fxrstor64">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+  def int_x86_fxsave : GCCBuiltin<"__builtin_ia32_fxsave">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+  def int_x86_fxsave64 : GCCBuiltin<"__builtin_ia32_fxsave64">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+}
+
 //===----------------------------------------------------------------------===//
 // Half float conversion
 
diff --git a/lib/Target/X86/X86InstrFPStack.td b/lib/Target/X86/X86InstrFPStack.td
index 0dd05d8befd..49068e9c37d 100644
--- a/lib/Target/X86/X86InstrFPStack.td
+++ b/lib/Target/X86/X86InstrFPStack.td
@@ -633,16 +633,16 @@ def FRNDINT : I<0xD9, MRM_FC, (outs), (ins), "frndint", [], IIC_FRNDINT>;
 def FSCALE : I<0xD9, MRM_FD, (outs), (ins), "fscale", [], IIC_FSCALE>;
 def FCOMPP : I<0xDE, MRM_D9, (outs), (ins), "fcompp", [], IIC_FCOMPP>;
 
-def FXSAVE : I<0xAE, MRM0m, (outs opaque512mem:$dst), (ins),
-               "fxsave\t$dst", [], IIC_FXSAVE>, TB;
-def FXSAVE64 : RI<0xAE, MRM0m, (outs opaque512mem:$dst), (ins),
-                  "fxsave64\t$dst", [], IIC_FXSAVE>, TB,
-                  Requires<[In64BitMode]>;
+def FXSAVE : I<0xAE, MRM0m, (outs), (ins opaque512mem:$dst),
+               "fxsave\t$dst", [(int_x86_fxsave addr:$dst)], IIC_FXSAVE>, TB;
+def FXSAVE64 : RI<0xAE, MRM0m, (outs), (ins opaque512mem:$dst),
+                  "fxsave64\t$dst", [(int_x86_fxsave64 addr:$dst)], 
+                  IIC_FXSAVE>, TB, Requires<[In64BitMode]>;
 def FXRSTOR : I<0xAE, MRM1m, (outs), (ins opaque512mem:$src),
-                "fxrstor\t$src", [], IIC_FXRSTOR>, TB;
+              "fxrstor\t$src", [(int_x86_fxrstor addr:$src)], IIC_FXRSTOR>, TB;
 def FXRSTOR64 : RI<0xAE, MRM1m, (outs), (ins opaque512mem:$src),
-                  "fxrstor64\t$src", [], IIC_FXRSTOR>, TB,
-                  Requires<[In64BitMode]>;
+                   "fxrstor64\t$src", [(int_x86_fxrstor64 addr:$src)],
+                   IIC_FXRSTOR>, TB, Requires<[In64BitMode]>;
 } // SchedRW
 
 //===----------------------------------------------------------------------===//
diff --git a/test/CodeGen/X86/system-intrinsics-64.ll b/test/CodeGen/X86/system-intrinsics-64.ll
new file mode 100644
index 00000000000..96c44177339
--- /dev/null
+++ b/test/CodeGen/X86/system-intrinsics-64.ll
@@ -0,0 +1,33 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
+
+define void @test_fxsave(i8* %ptr) {
+; CHECK-LABEL: test_fxsave
+; CHECK: fxsave
+  call void @llvm.x86.fxsave(i8* %ptr)
+  ret void;
+}
+declare void @llvm.x86.fxsave(i8*)
+
+define void @test_fxsave64(i8* %ptr) {
+; CHECK-LABEL: test_fxsave64
+; CHECK: fxsave64
+  call void @llvm.x86.fxsave64(i8* %ptr)
+  ret void;
+}
+declare void @llvm.x86.fxsave64(i8*)
+
+define void @test_fxrstor(i8* %ptr) {
+; CHECK-LABEL: test_fxrstor
+; CHECK: fxrstor
+  call void @llvm.x86.fxrstor(i8* %ptr)
+  ret void;
+}
+declare void @llvm.x86.fxrstor(i8*)
+
+define void @test_fxrstor64(i8* %ptr) {
+; CHECK-LABEL: test_fxrstor64
+; CHECK: fxrstor64
+  call void @llvm.x86.fxrstor64(i8* %ptr)
+  ret void;
+}
+declare void @llvm.x86.fxrstor64(i8*)
diff --git a/test/CodeGen/X86/system-intrinsics.ll b/test/CodeGen/X86/system-intrinsics.ll
new file mode 100644
index 00000000000..84fcd052d7d
--- /dev/null
+++ b/test/CodeGen/X86/system-intrinsics.ll
@@ -0,0 +1,17 @@
+; RUN: llc < %s -mtriple=i686-unknown-unknown   | FileCheck %s
+
+define void @test_fxsave(i8* %ptr) {
+; CHECK-LABEL: test_fxsave
+; CHECK: fxsave
+  call void @llvm.x86.fxsave(i8* %ptr)
+  ret void;
+}
+declare void @llvm.x86.fxsave(i8*)
+
+define void @test_fxrstor(i8* %ptr) {
+; CHECK-LABEL: test_fxrstor
+; CHECK: fxrstor
+  call void @llvm.x86.fxrstor(i8* %ptr)
+  ret void;
+}
+declare void @llvm.x86.fxrstor(i8*)
-- 
2.34.1