diff --git a/cranelift/codegen/src/isa/x64/inst/args.rs b/cranelift/codegen/src/isa/x64/inst/args.rs
index 600381496f..6b13b5283e 100644
--- a/cranelift/codegen/src/isa/x64/inst/args.rs
+++ b/cranelift/codegen/src/isa/x64/inst/args.rs
@@ -380,6 +380,8 @@ pub enum SseOpcode {
     Movaps,
     Movapd,
     Movd,
+    Movdqa,
+    Movdqu,
     Movq,
     Movss,
     Movsd,
@@ -487,6 +489,8 @@ impl SseOpcode {
             | SseOpcode::Movq
             | SseOpcode::Movsd
             | SseOpcode::Movupd
+            | SseOpcode::Movdqa
+            | SseOpcode::Movdqu
             | SseOpcode::Mulpd
             | SseOpcode::Mulsd
             | SseOpcode::Orpd
@@ -571,6 +575,8 @@ impl fmt::Debug for SseOpcode {
             SseOpcode::Movaps => "movaps",
             SseOpcode::Movapd => "movapd",
             SseOpcode::Movd => "movd",
+            SseOpcode::Movdqa => "movdqa",
+            SseOpcode::Movdqu => "movdqu",
             SseOpcode::Movq => "movq",
             SseOpcode::Movss => "movss",
             SseOpcode::Movsd => "movsd",
diff --git a/cranelift/codegen/src/isa/x64/inst/emit.rs b/cranelift/codegen/src/isa/x64/inst/emit.rs
index 6118284674..f2633bb1db 100644
--- a/cranelift/codegen/src/isa/x64/inst/emit.rs
+++ b/cranelift/codegen/src/isa/x64/inst/emit.rs
@@ -1596,8 +1596,12 @@ pub(crate) fn emit(
             let rex = RexFlags::clear_w();
 
             let (prefix, opcode) = match op {
+                SseOpcode::Cvtss2sd => (LegacyPrefix::_F3, 0x0F5A),
+                SseOpcode::Cvtsd2ss => (LegacyPrefix::_F2, 0x0F5A),
                 SseOpcode::Movaps => (LegacyPrefix::None, 0x0F28),
                 SseOpcode::Movapd => (LegacyPrefix::_66, 0x0F28),
+                SseOpcode::Movdqa => (LegacyPrefix::_66, 0x0F6F),
+                SseOpcode::Movdqu => (LegacyPrefix::_F3, 0x0F6F),
                 SseOpcode::Movsd => (LegacyPrefix::_F2, 0x0F10),
                 SseOpcode::Movss => (LegacyPrefix::_F3, 0x0F10),
                 SseOpcode::Movups => (LegacyPrefix::None, 0x0F10),
@@ -1606,8 +1610,6 @@ pub(crate) fn emit(
                 SseOpcode::Sqrtpd => (LegacyPrefix::_66, 0x0F51),
                 SseOpcode::Sqrtss => (LegacyPrefix::_F3, 0x0F51),
                 SseOpcode::Sqrtsd => (LegacyPrefix::_F2, 0x0F51),
-                SseOpcode::Cvtss2sd => (LegacyPrefix::_F3, 0x0F5A),
-                SseOpcode::Cvtsd2ss => (LegacyPrefix::_F2, 0x0F5A),
                 _ => unimplemented!("Opcode {:?} not implemented", op),
             };
 
@@ -1839,10 +1841,14 @@ pub(crate) fn emit(
             srcloc,
         } => {
             let (prefix, opcode) = match op {
+                SseOpcode::Movaps => (LegacyPrefix::None, 0x0F29),
+                SseOpcode::Movapd => (LegacyPrefix::_66, 0x0F29),
+                SseOpcode::Movdqa => (LegacyPrefix::_66, 0x0F7F),
+                SseOpcode::Movdqu => (LegacyPrefix::_F3, 0x0F7F),
                 SseOpcode::Movss => (LegacyPrefix::_F3, 0x0F11),
                 SseOpcode::Movsd => (LegacyPrefix::_F2, 0x0F11),
-                SseOpcode::Movaps => (LegacyPrefix::None, 0x0F29),
                 SseOpcode::Movups => (LegacyPrefix::None, 0x0F11),
+                SseOpcode::Movupd => (LegacyPrefix::_66, 0x0F11),
                 _ => unimplemented!("Opcode {:?} not implemented", op),
             };
             let dst = &dst.finalize(state);