AArch64: add initial NEON support

Patch by Ana Pazos.

- Completed implementation of instruction formats:
AdvSIMD three same
AdvSIMD modified immediate
AdvSIMD scalar pairwise

- Completed implementation of instruction classes
(some of the instructions in these classes
belong to yet unfinished instruction formats):
Vector Arithmetic
Vector Immediate
Vector Pairwise Arithmetic

- Initial implementation of instruction formats:
AdvSIMD scalar two-reg misc
AdvSIMD scalar three same

- Intial implementation of instruction class:
Scalar Arithmetic

- Initial clang changes to support arm v8 intrinsics.
Note: no clang changes for scalar intrinsics function name mangling yet.

- Comprehensive test cases for added instructions
To verify auto codegen, encoding, decoding, diagnosis, intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187567 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 207 insertions, 0 deletions

diff --git a/test/MC/AArch64/neon-mov.s b/test/MC/AArch64/neon-mov.s
new file mode 100644
index 0000000..8331372
--- /dev/null
+++ b/test/MC/AArch64/neon-mov.s
@@ -0,0 +1,207 @@
+// RUN: llvm-mc -triple aarch64-none-linux-gnu -mattr=+neon -show-encoding < %s | FileCheck %s
+
+// Check that the assembler can handle the documented syntax for AArch64
+
+
+//----------------------------------------------------------------------
+// Vector Move Immediate Shifted
+//----------------------------------------------------------------------
+         movi v0.2s, #1
+         movi v1.2s, #0
+         movi v15.2s, #1, lsl #8
+         movi v16.2s, #1, lsl #16
+         movi v31.2s, #1, lsl #24
+         movi v0.4s, #1
+         movi v0.4s, #1, lsl #8
+         movi v0.4s, #1, lsl #16
+         movi v0.4s, #1, lsl #24
+         movi v0.4h, #1
+         movi v0.4h, #1, lsl #8
+         movi v0.8h, #1
+         movi v0.8h, #1, lsl #8
+
+// CHECK:  movi v0.2s, #0x1           // encoding: [0x20,0x04,0x00,0x0f]
+// CHECK:  movi v1.2s, #0x0           // encoding: [0x01,0x04,0x00,0x0f]
+// CHECK:  movi v15.2s, #0x1, lsl #8  // encoding: [0x2f,0x24,0x00,0x0f]
+// CHECK:  movi v16.2s, #0x1, lsl #16 // encoding: [0x30,0x44,0x00,0x0f]
+// CHECK:  movi v31.2s, #0x1, lsl #24 // encoding: [0x3f,0x64,0x00,0x0f]
+// CHECK:  movi v0.4s, #0x1           // encoding: [0x20,0x04,0x00,0x4f]
+// CHECK:  movi v0.4s, #0x1, lsl #8   // encoding: [0x20,0x24,0x00,0x4f]
+// CHECK:  movi v0.4s, #0x1, lsl #16  // encoding: [0x20,0x44,0x00,0x4f]
+// CHECK:  movi v0.4s, #0x1, lsl #24  // encoding: [0x20,0x64,0x00,0x4f]
+// CHECK:  movi v0.4h, #0x1           // encoding: [0x20,0x84,0x00,0x0f]
+// CHECK:  movi v0.4h, #0x1, lsl #8   // encoding: [0x20,0xa4,0x00,0x0f]
+// CHECK:  movi v0.8h, #0x1           // encoding: [0x20,0x84,0x00,0x4f]
+// CHECK:  movi v0.8h, #0x1, lsl #8   // encoding: [0x20,0xa4,0x00,0x4f]
+
+//----------------------------------------------------------------------
+// Vector Move Inverted Immediate Shifted
+//----------------------------------------------------------------------
+         mvni v0.2s, #1
+         mvni v1.2s, #0
+         mvni v0.2s, #1, lsl #8
+         mvni v0.2s, #1, lsl #16
+         mvni v0.2s, #1, lsl #24
+         mvni v0.4s, #1
+         mvni v15.4s, #1, lsl #8
+         mvni v16.4s, #1, lsl #16
+         mvni v31.4s, #1, lsl #24
+         mvni v0.4h, #1
+         mvni v0.4h, #1, lsl #8
+         mvni v0.8h, #1
+         mvni v0.8h, #1, lsl #8
+
+// CHECK:  mvni v0.2s, #0x1           // encoding: [0x20,0x04,0x00,0x2f]
+// CHECK:  mvni v1.2s, #0x0           // encoding: [0x01,0x04,0x00,0x2f]
+// CHECK:  mvni v0.2s, #0x1, lsl #8   // encoding: [0x20,0x24,0x00,0x2f]
+// CHECK:  mvni v0.2s, #0x1, lsl #16  // encoding: [0x20,0x44,0x00,0x2f]
+// CHECK:  mvni v0.2s, #0x1, lsl #24  // encoding: [0x20,0x64,0x00,0x2f]
+// CHECK:  mvni v0.4s, #0x1           // encoding: [0x20,0x04,0x00,0x6f]
+// CHECK:  mvni v15.4s, #0x1, lsl #8  // encoding: [0x2f,0x24,0x00,0x6f]
+// CHECK:  mvni v16.4s, #0x1, lsl #16 // encoding: [0x30,0x44,0x00,0x6f]
+// CHECK:  mvni v31.4s, #0x1, lsl #24 // encoding: [0x3f,0x64,0x00,0x6f]
+// CHECK:  mvni v0.4h, #0x1           // encoding: [0x20,0x84,0x00,0x2f]
+// CHECK:  mvni v0.4h, #0x1, lsl #8   // encoding: [0x20,0xa4,0x00,0x2f]
+// CHECK:  mvni v0.8h, #0x1           // encoding: [0x20,0x84,0x00,0x6f]
+// CHECK:  mvni v0.8h, #0x1, lsl #8   // encoding: [0x20,0xa4,0x00,0x6f]
+
+//----------------------------------------------------------------------
+// Vector Bitwise Bit Clear (AND NOT) - immediate
+//----------------------------------------------------------------------
+         bic v0.2s, #1
+         bic v1.2s, #0
+         bic v0.2s, #1, lsl #8
+         bic v0.2s, #1, lsl #16
+         bic v0.2s, #1, lsl #24
+         bic v0.4s, #1
+         bic v0.4s, #1, lsl #8
+         bic v0.4s, #1, lsl #16
+         bic v0.4s, #1, lsl #24
+         bic v15.4h, #1
+         bic v16.4h, #1, lsl #8
+         bic v0.8h, #1
+         bic v31.8h, #1, lsl #8
+
+// CHECK:  bic v0.2s, #0x1           // encoding: [0x20,0x14,0x00,0x2f]
+// CHECK:  bic v1.2s, #0x0           // encoding: [0x01,0x14,0x00,0x2f]
+// CHECK:  bic v0.2s, #0x1, lsl #8   // encoding: [0x20,0x34,0x00,0x2f]
+// CHECK:  bic v0.2s, #0x1, lsl #16  // encoding: [0x20,0x54,0x00,0x2f]
+// CHECK:  bic v0.2s, #0x1, lsl #24  // encoding: [0x20,0x74,0x00,0x2f]
+// CHECK:  bic v0.4s, #0x1           // encoding: [0x20,0x14,0x00,0x6f]
+// CHECK:  bic v0.4s, #0x1, lsl #8   // encoding: [0x20,0x34,0x00,0x6f]
+// CHECK:  bic v0.4s, #0x1, lsl #16  // encoding: [0x20,0x54,0x00,0x6f]
+// CHECK:  bic v0.4s, #0x1, lsl #24  // encoding: [0x20,0x74,0x00,0x6f]
+// CHECK:  bic v15.4h, #0x1          // encoding: [0x2f,0x94,0x00,0x2f]
+// CHECK:  bic v16.4h, #0x1, lsl #8  // encoding: [0x30,0xb4,0x00,0x2f]
+// CHECK:  bic v0.8h, #0x1           // encoding: [0x20,0x94,0x00,0x6f]
+// CHECK:  bic v31.8h, #0x1, lsl #8  // encoding: [0x3f,0xb4,0x00,0x6f]
+
+//----------------------------------------------------------------------
+// Vector Bitwise OR - immedidate
+//----------------------------------------------------------------------
+         orr v0.2s, #1
+         orr v1.2s, #0
+         orr v0.2s, #1, lsl #8
+         orr v0.2s, #1, lsl #16
+         orr v0.2s, #1, lsl #24
+         orr v0.4s, #1
+         orr v0.4s, #1, lsl #8
+         orr v0.4s, #1, lsl #16
+         orr v0.4s, #1, lsl #24
+         orr v31.4h, #1
+         orr v15.4h, #1, lsl #8
+         orr v0.8h, #1
+         orr v16.8h, #1, lsl #8
+
+// CHECK:  orr v0.2s, #0x1           // encoding: [0x20,0x14,0x00,0x0f]
+// CHECK:  orr v1.2s, #0x0           // encoding: [0x01,0x14,0x00,0x0f]
+// CHECK:  orr v0.2s, #0x1, lsl #8   // encoding: [0x20,0x34,0x00,0x0f]
+// CHECK:  orr v0.2s, #0x1, lsl #16  // encoding: [0x20,0x54,0x00,0x0f]
+// CHECK:  orr v0.2s, #0x1, lsl #24  // encoding: [0x20,0x74,0x00,0x0f]
+// CHECK:  orr v0.4s, #0x1           // encoding: [0x20,0x14,0x00,0x4f]
+// CHECK:  orr v0.4s, #0x1, lsl #8   // encoding: [0x20,0x34,0x00,0x4f]
+// CHECK:  orr v0.4s, #0x1, lsl #16  // encoding: [0x20,0x54,0x00,0x4f]
+// CHECK:  orr v0.4s, #0x1, lsl #24  // encoding: [0x20,0x74,0x00,0x4f]
+// CHECK:  orr v31.4h, #0x1          // encoding: [0x3f,0x94,0x00,0x0f]
+// CHECK:  orr v15.4h, #0x1, lsl #8  // encoding: [0x2f,0xb4,0x00,0x0f]
+// CHECK:  orr v0.8h, #0x1           // encoding: [0x20,0x94,0x00,0x4f]
+// CHECK:  orr v16.8h, #0x1, lsl #8  // encoding: [0x30,0xb4,0x00,0x4f]
+
+//----------------------------------------------------------------------
+// Vector Move Immediate Masked
+//----------------------------------------------------------------------
+         movi v0.2s, #1, msl #8
+         movi v1.2s, #1, msl #16
+         movi v0.4s, #1, msl #8
+         movi v31.4s, #1, msl #16
+
+// CHECK:  movi v0.2s, #0x1, msl #8   // encoding: [0x20,0xc4,0x00,0x0f]
+// CHECK:  movi v1.2s, #0x1, msl #16  // encoding: [0x21,0xd4,0x00,0x0f]
+// CHECK:  movi v0.4s, #0x1, msl #8   // encoding: [0x20,0xc4,0x00,0x4f]
+// CHECK:  movi v31.4s, #0x1, msl #16 // encoding: [0x3f,0xd4,0x00,0x4f]
+
+//----------------------------------------------------------------------
+// Vector Move Inverted Immediate Masked
+//----------------------------------------------------------------------
+         mvni v1.2s, #0x1, msl #8
+         mvni v0.2s, #0x1, msl #16
+         mvni v31.4s, #0x1, msl #8
+         mvni v0.4s, #0x1, msl #16
+
+// CHECK:   mvni v1.2s, #0x1, msl #8  // encoding: [0x21,0xc4,0x00,0x2f]
+// CHECK:   mvni v0.2s, #0x1, msl #16 // encoding: [0x20,0xd4,0x00,0x2f]
+// CHECK:   mvni v31.4s, #0x1, msl #8 // encoding: [0x3f,0xc4,0x00,0x6f]
+// CHECK:   mvni v0.4s, #0x1, msl #16 // encoding: [0x20,0xd4,0x00,0x6f]
+
+//----------------------------------------------------------------------
+// Vector Immediate - per byte
+//----------------------------------------------------------------------
+         movi v0.8b, #0
+         movi v31.8b, #0xff
+         movi v15.16b, #0xf
+         movi v31.16b, #0x1f
+
+// CHECK:   movi v0.8b, #0x0        // encoding: [0x00,0xe4,0x00,0x0f]
+// CHECK:   movi v31.8b, #0xff      // encoding: [0xff,0xe7,0x07,0x0f]
+// CHECK:   movi v15.16b, #0xf      // encoding: [0xef,0xe5,0x00,0x4f]
+// CHECK:   movi v31.16b, #0x1f     // encoding: [0xff,0xe7,0x00,0x4f]
+
+//----------------------------------------------------------------------
+// Vector Move Immediate - bytemask, per doubleword
+//---------------------------------------------------------------------
+         movi v0.2d, #0xff00ff00ff00ff00
+
+// CHECK: movi v0.2d, #0xff00ff00ff00ff00 // encoding: [0x40,0xe5,0x05,0x6f]
+
+//----------------------------------------------------------------------
+// Vector Move Immediate - bytemask, one doubleword
+//----------------------------------------------------------------------
+         movi d0, #0xff00ff00ff00ff00
+
+// CHECK: movi d0,  #0xff00ff00ff00ff00 // encoding: [0x40,0xe5,0x05,0x2f]
+
+//----------------------------------------------------------------------
+// Vector Floating Point Move Immediate
+//----------------------------------------------------------------------
+         fmov v1.2s, #1.0
+         fmov v15.4s, #1.0
+         fmov v31.2d, #1.0
+
+// CHECK:  fmov v1.2s, #1.00000000     // encoding: [0x01,0xf6,0x03,0x0f]
+// CHECK:  fmov v15.4s, #1.00000000    // encoding: [0x0f,0xf6,0x03,0x4f]
+// CHECK:  fmov v31.2d, #1.00000000    // encoding: [0x1f,0xf6,0x03,0x6f]
+
+
+//----------------------------------------------------------------------
+// Vector Move -  register
+//----------------------------------------------------------------------
+      mov v0.8b, v31.8b
+      mov v15.16b, v16.16b
+      orr v0.8b, v31.8b, v31.8b
+      orr v15.16b, v16.16b, v16.16b
+
+// CHECK:   mov v0.8b, v31.8b     // encoding: [0xe0,0x1f,0xbf,0x0e]
+// CHECK:   mov v15.16b, v16.16b  // encoding: [0x0f,0x1e,0xb0,0x4e]
+// CHECK:   mov v0.8b, v31.8b     // encoding: [0xe0,0x1f,0xbf,0x0e]
+// CHECK:   mov v15.16b, v16.16b  // encoding: [0x0f,0x1e,0xb0,0x4e]
+