From 4e7f8390c0aada41b820fe47f65b7bde570f53a7 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 20 May 2010 20:36:29 +0000
Subject: [PATCH] MC/X86: Add movq alias for movabsq, to allow matching 64-bit
 immediates with movq.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104275 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86Instr64bit.td            |  7 +++++++
 test/MC/AsmParser/X86/x86_64-new-encoder.s | 20 ++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td
index 3cbb2f5a8ce..24a1296c163 100644
--- a/lib/Target/X86/X86Instr64bit.td
+++ b/lib/Target/X86/X86Instr64bit.td
@@ -354,6 +354,13 @@ def MOV64ri32 : RIi32<0xC7, MRM0r, (outs GR64:$dst), (ins i64i32imm:$src),
                       [(set GR64:$dst, i64immSExt32:$src)]>;
 }
 
+// The assembler accepts movq of a 64-bit immediate as an alternate spelling of
+// movabsq.
+let isAsmParserOnly = 1 in {
+def MOV64ri_alt : RIi64<0xB8, AddRegFrm, (outs GR64:$dst), (ins i64imm:$src),
+                    "mov{q}\t{$src, $dst|$dst, $src}", []>;
+}
+
 def MOV64rr_REV : RI<0x8B, MRMSrcReg, (outs GR64:$dst), (ins GR64:$src),
                      "mov{q}\t{$src, $dst|$dst, $src}", []>;
 
diff --git a/test/MC/AsmParser/X86/x86_64-new-encoder.s b/test/MC/AsmParser/X86/x86_64-new-encoder.s
index bc8ad21ba72..589c719158f 100644
--- a/test/MC/AsmParser/X86/x86_64-new-encoder.s
+++ b/test/MC/AsmParser/X86/x86_64-new-encoder.s
@@ -84,3 +84,23 @@ movl	0, %eax   // CHECK: movl 0, %eax # encoding: [0x8b,0x04,0x25,A,A,A,A]
         popf
 // CHECK: popfq	        # encoding: [0x9d]
         popfq
+
+// CHECK: movabsq $-281474976710654, %rax
+// CHECK: encoding: [0x48,0xb8,0x02,0x00,0x00,0x00,0x00,0x00,0xff,0xff]
+        movabsq $0xFFFF000000000002, %rax
+
+// CHECK: movq $-281474976710654, %rax
+// CHECK: encoding: [0x48,0xb8,0x02,0x00,0x00,0x00,0x00,0x00,0xff,0xff]
+        movq $0xFFFF000000000002, %rax
+
+// CHECK: movq $-65536, %rax
+// CHECK: encoding: [0x48,0xc7,0xc0,0x00,0x00,0xff,0xff]
+        movq $0xFFFFFFFFFFFF0000, %rax
+
+// CHECK: movq $-256, %rax
+// CHECK: encoding: [0x48,0xc7,0xc0,0x00,0xff,0xff,0xff]
+        movq $0xFFFFFFFFFFFFFF00, %rax
+
+// CHECK: movq $10, %rax
+// CHECK: encoding: [0x48,0xc7,0xc0,0x0a,0x00,0x00,0x00]
+        movq $10, %rax
-- 
2.34.1