diff --git a/compiler/rustc_codegen_llvm/src/asm.rs b/compiler/rustc_codegen_llvm/src/asm.rs
index a571418c1f5..0aef77129d8 100644
--- a/compiler/rustc_codegen_llvm/src/asm.rs
+++ b/compiler/rustc_codegen_llvm/src/asm.rs
@@ -283,7 +283,7 @@ impl AsmBuilderMethods<'tcx> for Builder<'a, 'll, 'tcx> {
                 }
                 InlineAsmArch::RiscV32 | InlineAsmArch::RiscV64 => {}
                 InlineAsmArch::Nvptx64 => {}
-                InlineAsmArch::PowerPC => {}
+                InlineAsmArch::PowerPC | InlineAsmArch::PowerPC64 => {}
                 InlineAsmArch::Hexagon => {}
                 InlineAsmArch::Mips | InlineAsmArch::Mips64 => {}
                 InlineAsmArch::SpirV => {}
diff --git a/compiler/rustc_target/src/asm/mod.rs b/compiler/rustc_target/src/asm/mod.rs
index f12debb5a34..c2f6bb76295 100644
--- a/compiler/rustc_target/src/asm/mod.rs
+++ b/compiler/rustc_target/src/asm/mod.rs
@@ -184,6 +184,7 @@ pub enum InlineAsmArch {
     Mips,
     Mips64,
     PowerPC,
+    PowerPC64,
     SpirV,
     Wasm32,
 }
@@ -201,6 +202,7 @@ impl FromStr for InlineAsmArch {
             "riscv64" => Ok(Self::RiscV64),
             "nvptx64" => Ok(Self::Nvptx64),
             "powerpc" => Ok(Self::PowerPC),
+            "powerpc64" => Ok(Self::PowerPC64),
             "hexagon" => Ok(Self::Hexagon),
             "mips" => Ok(Self::Mips),
             "mips64" => Ok(Self::Mips64),
@@ -290,7 +292,7 @@ impl InlineAsmReg {
             InlineAsmArch::Nvptx64 => {
                 Self::Nvptx(NvptxInlineAsmReg::parse(arch, has_feature, target, &name)?)
             }
-            InlineAsmArch::PowerPC => {
+            InlineAsmArch::PowerPC | InlineAsmArch::PowerPC64 => {
                 Self::PowerPC(PowerPCInlineAsmReg::parse(arch, has_feature, target, &name)?)
             }
             InlineAsmArch::Hexagon => {
@@ -485,7 +487,9 @@ impl InlineAsmRegClass {
                 Self::RiscV(RiscVInlineAsmRegClass::parse(arch, name)?)
             }
             InlineAsmArch::Nvptx64 => Self::Nvptx(NvptxInlineAsmRegClass::parse(arch, name)?),
-            InlineAsmArch::PowerPC => Self::PowerPC(PowerPCInlineAsmRegClass::parse(arch, name)?),
+            InlineAsmArch::PowerPC | InlineAsmArch::PowerPC64 => {
+                Self::PowerPC(PowerPCInlineAsmRegClass::parse(arch, name)?)
+            }
             InlineAsmArch::Hexagon => Self::Hexagon(HexagonInlineAsmRegClass::parse(arch, name)?),
             InlineAsmArch::Mips | InlineAsmArch::Mips64 => {
                 Self::Mips(MipsInlineAsmRegClass::parse(arch, name)?)
@@ -653,7 +657,7 @@ pub fn allocatable_registers(
             nvptx::fill_reg_map(arch, has_feature, target, &mut map);
             map
         }
-        InlineAsmArch::PowerPC => {
+        InlineAsmArch::PowerPC | InlineAsmArch::PowerPC64 => {
             let mut map = powerpc::regclass_map();
             powerpc::fill_reg_map(arch, has_feature, target, &mut map);
             map
diff --git a/compiler/rustc_target/src/asm/powerpc.rs b/compiler/rustc_target/src/asm/powerpc.rs
index b254e5f3aaa..42fc25c4ff5 100644
--- a/compiler/rustc_target/src/asm/powerpc.rs
+++ b/compiler/rustc_target/src/asm/powerpc.rs
@@ -33,10 +33,16 @@ impl PowerPCInlineAsmRegClass {
 
     pub fn supported_types(
         self,
-        _arch: InlineAsmArch,
+        arch: InlineAsmArch,
     ) -> &'static [(InlineAsmType, Option<&'static str>)] {
         match self {
-            Self::reg | Self::reg_nonzero => types! { _: I8, I16, I32; },
+            Self::reg | Self::reg_nonzero => {
+                if arch == InlineAsmArch::PowerPC {
+                    types! { _: I8, I16, I32; }
+                } else {
+                    types! { _: I8, I16, I32, I64; }
+                }
+            }
             Self::freg => types! { _: F32, F64; },
         }
     }
diff --git a/src/test/assembly/asm/powerpc-types.rs b/src/test/assembly/asm/powerpc-types.rs
index 26c891392f2..742e4ddaed6 100644
--- a/src/test/assembly/asm/powerpc-types.rs
+++ b/src/test/assembly/asm/powerpc-types.rs
@@ -1,6 +1,8 @@
 // min-llvm-version: 10.0.1
+// revisions: powerpc powerpc64
 // assembly-output: emit-asm
-// compile-flags: --target powerpc-unknown-linux-gnu
+//[powerpc] compile-flags: --target powerpc-unknown-linux-gnu
+//[powerpc64] compile-flags: --target powerpc64-unknown-linux-gnu
 // needs-llvm-components: powerpc
 
 #![feature(no_core, lang_items, rustc_attrs, repr_simd)]
@@ -86,6 +88,13 @@ check!(reg_i16, i16, reg, "mr");
 // CHECK: #NO_APP
 check!(reg_i32, i32, reg, "mr");
 
+// powerpc64-LABEL: reg_i64:
+// powerpc64: #APP
+// powerpc64: mr {{[0-9]+}}, {{[0-9]+}}
+// powerpc64: #NO_APP
+#[cfg(powerpc64)]
+check!(reg_i64, i64, reg, "mr");
+
 // CHECK-LABEL: reg_i8_nz:
 // CHECK: #APP
 // CHECK: mr {{[0-9]+}}, {{[0-9]+}}
@@ -104,6 +113,13 @@ check!(reg_i16_nz, i16, reg_nonzero, "mr");
 // CHECK: #NO_APP
 check!(reg_i32_nz, i32, reg_nonzero, "mr");
 
+// powerpc64-LABEL: reg_i64_nz:
+// powerpc64: #APP
+// powerpc64: mr {{[0-9]+}}, {{[0-9]+}}
+// powerpc64: #NO_APP
+#[cfg(powerpc64)]
+check!(reg_i64_nz, i64, reg_nonzero, "mr");
+
 // CHECK-LABEL: reg_f32:
 // CHECK: #APP
 // CHECK: fmr {{[0-9]+}}, {{[0-9]+}}
@@ -134,6 +150,13 @@ check_reg!(reg_i16_r0, i16, "0", "0", "mr");
 // CHECK: #NO_APP
 check_reg!(reg_i32_r0, i32, "0", "0", "mr");
 
+// powerpc64-LABEL: reg_i64_r0:
+// powerpc64: #APP
+// powerpc64: mr 0, 0
+// powerpc64: #NO_APP
+#[cfg(powerpc64)]
+check_reg!(reg_i64_r0, i64, "0", "0", "mr");
+
 // CHECK-LABEL: reg_i8_r18:
 // CHECK: #APP
 // CHECK: mr 18, 18
@@ -152,6 +175,13 @@ check_reg!(reg_i16_r18, i16, "18", "18", "mr");
 // CHECK: #NO_APP
 check_reg!(reg_i32_r18, i32, "18", "18", "mr");
 
+// powerpc64-LABEL: reg_i64_r18:
+// powerpc64: #APP
+// powerpc64: mr 18, 18
+// powerpc64: #NO_APP
+#[cfg(powerpc64)]
+check_reg!(reg_i64_r18, i64, "18", "18", "mr");
+
 // CHECK-LABEL: reg_f32_f0:
 // CHECK: #APP
 // CHECK: fmr 0, 0