From 124096735bba3072b02e319d92d66fc683d38b83 Mon Sep 17 00:00:00 2001
From: Johnnie Birch <45402135+jlb6740@users.noreply.github.com>
Date: Sun, 22 Nov 2020 21:55:37 -0800
Subject: [PATCH] Add support for palignr for X86_64 vcode backend

---
 cranelift/codegen/src/isa/x64/inst/args.rs       | 8 +++++++-
 cranelift/codegen/src/isa/x64/inst/emit.rs       | 1 +
 cranelift/codegen/src/isa/x64/inst/emit_tests.rs | 5 +++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/cranelift/codegen/src/isa/x64/inst/args.rs b/cranelift/codegen/src/isa/x64/inst/args.rs
index 2958dd56d0..feede2e063 100644
--- a/cranelift/codegen/src/isa/x64/inst/args.rs
+++ b/cranelift/codegen/src/isa/x64/inst/args.rs
@@ -476,6 +476,7 @@ pub enum SseOpcode {
     Paddsw,
     Paddusb,
     Paddusw,
+    Palignr,
     Pand,
     Pandn,
     Pavgb,
@@ -688,7 +689,11 @@ impl SseOpcode {
             | SseOpcode::Ucomisd
             | SseOpcode::Xorpd => SSE2,
 
-            SseOpcode::Pabsb | SseOpcode::Pabsw | SseOpcode::Pabsd | SseOpcode::Pshufb => SSSE3,
+            SseOpcode::Pabsb
+            | SseOpcode::Pabsw
+            | SseOpcode::Pabsd
+            | SseOpcode::Palignr
+            | SseOpcode::Pshufb => SSSE3,
 
             SseOpcode::Insertps
             | SseOpcode::Pcmpeqq
@@ -805,6 +810,7 @@ impl fmt::Debug for SseOpcode {
             SseOpcode::Paddsw => "paddsw",
             SseOpcode::Paddusb => "paddusb",
             SseOpcode::Paddusw => "paddusw",
+            SseOpcode::Palignr => "palignr",
             SseOpcode::Pand => "pand",
             SseOpcode::Pandn => "pandn",
             SseOpcode::Pavgb => "pavgb",
diff --git a/cranelift/codegen/src/isa/x64/inst/emit.rs b/cranelift/codegen/src/isa/x64/inst/emit.rs
index 7d04e0e800..ec46d27744 100644
--- a/cranelift/codegen/src/isa/x64/inst/emit.rs
+++ b/cranelift/codegen/src/isa/x64/inst/emit.rs
@@ -1970,6 +1970,7 @@ pub(crate) fn emit(
                 SseOpcode::Cmpss => (LegacyPrefixes::_F3, 0x0FC2, 2),
                 SseOpcode::Cmpsd => (LegacyPrefixes::_F2, 0x0FC2, 2),
                 SseOpcode::Insertps => (LegacyPrefixes::_66, 0x0F3A21, 3),
+                SseOpcode::Palignr => (LegacyPrefixes::_66, 0x0F3A0F, 3),
                 SseOpcode::Pinsrb => (LegacyPrefixes::_66, 0x0F3A20, 3),
                 SseOpcode::Pinsrw => (LegacyPrefixes::_66, 0x0FC4, 2),
                 SseOpcode::Pinsrd => (LegacyPrefixes::_66, 0x0F3A22, 3),
diff --git a/cranelift/codegen/src/isa/x64/inst/emit_tests.rs b/cranelift/codegen/src/isa/x64/inst/emit_tests.rs
index bfcd7a401f..59560cd4ef 100644
--- a/cranelift/codegen/src/isa/x64/inst/emit_tests.rs
+++ b/cranelift/codegen/src/isa/x64/inst/emit_tests.rs
@@ -3481,6 +3481,11 @@ fn test_x64_emit() {
         "410FC2FF00",
         "cmpps   $0, %xmm15, %xmm7",
     ));
+    insns.push((
+        Inst::xmm_rm_r_imm(SseOpcode::Palignr, RegMem::reg(xmm1), w_xmm9, 3, false),
+        "66440F3A0FC903",
+        "palignr $3, %xmm1, %xmm9",
+    ));
 
     // ========================================================
     // Pertaining to atomics.