From 64eacd9136dc45e54dd2728117f71403701fd39c Mon Sep 17 00:00:00 2001
From: Tim Northover <Tim.Northover@arm.com>
Date: Thu, 6 Sep 2012 14:36:55 +0000
Subject: [PATCH] Use correct part of complex operand to encode VST1 alignment.

Patch by Chris Lidbury.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163318 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrNEON.td                |  4 +-
 .../Disassembler/ARM/neont-VST-reencoding.txt | 77 +++++++++++++++++++
 2 files changed, 79 insertions(+), 2 deletions(-)
 create mode 100644 test/MC/Disassembler/ARM/neont-VST-reencoding.txt

diff --git a/lib/Target/ARM/ARMInstrNEON.td b/lib/Target/ARM/ARMInstrNEON.td
index c5f3a83ab24..8158a11f831 100644
--- a/lib/Target/ARM/ARMInstrNEON.td
+++ b/lib/Target/ARM/ARMInstrNEON.td
@@ -1980,7 +1980,7 @@ def VST1LNd8  : VST1LN<0b0000, {?,?,?,0}, "8", v8i8, truncstorei8,
 def VST1LNd16 : VST1LN<0b0100, {?,?,0,?}, "16", v4i16, truncstorei16,
                        NEONvgetlaneu, addrmode6> {
   let Inst{7-6} = lane{1-0};
-  let Inst{4}   = Rn{5};
+  let Inst{4}   = Rn{4};
 }
 
 def VST1LNd32 : VST1LN<0b1000, {?,0,?,?}, "32", v2i32, store, extractelt,
@@ -2023,7 +2023,7 @@ def VST1LNd8_UPD  : VST1LNWB<0b0000, {?,?,?,0}, "8", v8i8, post_truncsti8,
 def VST1LNd16_UPD : VST1LNWB<0b0100, {?,?,0,?}, "16", v4i16, post_truncsti16,
                              NEONvgetlaneu, addrmode6> {
   let Inst{7-6} = lane{1-0};
-  let Inst{4}   = Rn{5};
+  let Inst{4}   = Rn{4};
 }
 def VST1LNd32_UPD : VST1LNWB<0b1000, {?,0,?,?}, "32", v2i32, post_store,
                              extractelt, addrmode6oneL32> {
diff --git a/test/MC/Disassembler/ARM/neont-VST-reencoding.txt b/test/MC/Disassembler/ARM/neont-VST-reencoding.txt
new file mode 100644
index 00000000000..eb3722c0853
--- /dev/null
+++ b/test/MC/Disassembler/ARM/neont-VST-reencoding.txt
@@ -0,0 +1,77 @@
+# RUN: llvm-mc -triple thumbv7 -show-encoding -disassemble < %s | FileCheck %s
+
+0x80 0xf9 0x00 0x00
+0x81 0xf9 0x21 0x10
+0x81 0xf9 0x42 0x10
+0x81 0xf9 0x61 0x20
+0x82 0xf9 0x82 0x20
+0x82 0xf9 0xa1 0x10
+0x82 0xf9 0xc2 0x20
+0x83 0xf9 0xe3 0x30
+
+# CHECK: vst1.8  {d0[0]}, [r0], r0 @ encoding: [0x80,0xf9,0x00,0x00]
+# CHECK: vst1.8  {d1[1]}, [r1], r1 @ encoding: [0x81,0xf9,0x21,0x10]
+# CHECK: vst1.8  {d1[2]}, [r1], r2 @ encoding: [0x81,0xf9,0x42,0x10]
+# CHECK: vst1.8  {d2[3]}, [r1], r1 @ encoding: [0x81,0xf9,0x61,0x20]
+# CHECK: vst1.8  {d2[4]}, [r2], r2 @ encoding: [0x82,0xf9,0x82,0x20]
+# CHECK: vst1.8  {d1[5]}, [r2], r1 @ encoding: [0x82,0xf9,0xa1,0x10]
+# CHECK: vst1.8  {d2[6]}, [r2], r2 @ encoding: [0x82,0xf9,0xc2,0x20]
+# CHECK: vst1.8  {d3[7]}, [r3], r3 @ encoding: [0x83,0xf9,0xe3,0x30]
+
+0x80 0xf9 0x00 0x04
+0xc3 0xf9 0x13 0x04
+0xc4 0xf9 0x43 0x04
+0xc5 0xf9 0x55 0x04
+0xc6 0xf9 0x85 0x04
+0xc7 0xf9 0x95 0x74
+0xc8 0xf9 0xc7 0x84
+0xc9 0xf9 0xd9 0x94
+
+# CHECK: vst1.16 {d0[0]},  [r0], r0      @ encoding: [0x80,0xf9,0x00,0x04]
+# CHECK: vst1.16 {d16[0]}, [r3, :16], r3 @ encoding: [0xc3,0xf9,0x13,0x04]
+# CHECK: vst1.16 {d16[1]}, [r4], r3      @ encoding: [0xc4,0xf9,0x43,0x04]
+# CHECK: vst1.16 {d16[1]}, [r5, :16], r5 @ encoding: [0xc5,0xf9,0x55,0x04]
+# CHECK: vst1.16 {d16[2]}, [r6], r5      @ encoding: [0xc6,0xf9,0x85,0x04]
+# CHECK: vst1.16 {d23[2]}, [r7, :16], r5 @ encoding: [0xc7,0xf9,0x95,0x74]
+# CHECK: vst1.16 {d24[3]}, [r8], r7      @ encoding: [0xc8,0xf9,0xc7,0x84]
+# CHECK: vst1.16 {d25[3]}, [r9, :16], r9 @ encoding: [0xc9,0xf9,0xd9,0x94]
+
+0x8a 0xf9 0x01 0xa8
+0xcb 0xf9 0x32 0x18
+0x8c 0xf9 0x83 0xb8
+0xcd 0xf9 0xb4 0x28
+
+# CHECK: vst1.32 {d10[0]}, [r10], r1      @ encoding: [0x8a,0xf9,0x01,0xa8]
+# CHECK: vst1.32 {d17[0]}, [r11, :32], r2 @ encoding: [0xcb,0xf9,0x32,0x18]
+# CHECK: vst1.32 {d11[1]}, [r12], r3      @ encoding: [0x8c,0xf9,0x83,0xb8]
+# CHECK: vst1.32 {d18[1]}, [sp, :32], r4  @ encoding: [0xcd,0xf9,0xb4,0x28]
+
+0x81 0xf9 0x1f 0x44
+0x82 0xf9 0x8f 0x30
+
+# CHECK: vst1.16 {d4[0]}, [r1, :16] @ encoding: [0x81,0xf9,0x1f,0x44]
+# CHECK: vst1.8  {d3[4]}, [r2]      @ encoding: [0x82,0xf9,0x8f,0x30]
+
+0x83 0xf9 0x1d 0x24
+0x84 0xf9 0x8d 0x10
+
+# CHECK: vst1.16 {d2[0]}, [r3, :16]! @ encoding: [0x83,0xf9,0x1d,0x24]
+# CHECK: vst1.8  {d1[4]}, [r4]!      @ encoding: [0x84,0xf9,0x8d,0x10]
+
+0x85 0xf9 0x10 0x04
+0x85 0xf9 0x1a 0x74
+0x8e 0xf9 0x1a 0x84
+0x85 0xf9 0x1a 0x94
+
+# CHECK: vst1.16 {d0[0]}, [r5, :16], r0  @ encoding: [0x85,0xf9,0x10,0x04]
+# CHECK: vst1.16 {d7[0]}, [r5, :16], r10 @ encoding: [0x85,0xf9,0x1a,0x74]
+# CHECK: vst1.16 {d8[0]}, [lr, :16], r10 @ encoding: [0x8e,0xf9,0x1a,0x84]
+# CHECK: vst1.16 {d9[0]}, [r5, :16], r10 @ encoding: [0x85,0xf9,0x1a,0x94]
+
+0x81 0xf9 0x24 0x0b
+0x82 0xf9 0x25 0x07
+0x83 0xf9 0x26 0x03
+
+# CHECK: vst4.32 {d0[0], d1[0], d2[0], d3[0]}, [r1, :128], r4 @ encoding: [0x81,0xf9,0x24,0x0b]
+# CHECK: vst4.16 {d0[0], d2[0], d4[0], d6[0]}, [r2], r5       @ encoding: [0x82,0xf9,0x25,0x07]
+# CHECK: vst4.8  {d0[1], d1[1], d2[1], d3[1]}, [r3], r6       @ encoding: [0x83,0xf9,0x26,0x03]