1 files changed, 107 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/asm/s390x.rs b/compiler/rustc_target/src/asm/s390x.rs
new file mode 100644
index 000000000..0a50064f5
--- /dev/null
+++ b/compiler/rustc_target/src/asm/s390x.rs
@@ -0,0 +1,107 @@
+use super::{InlineAsmArch, InlineAsmType};
+use rustc_macros::HashStable_Generic;
+use rustc_span::Symbol;
+use std::fmt;
+
+def_reg_class! {
+    S390x S390xInlineAsmRegClass {
+        reg,
+        freg,
+    }
+}
+
+impl S390xInlineAsmRegClass {
+    pub fn valid_modifiers(self, _arch: super::InlineAsmArch) -> &'static [char] {
+        &[]
+    }
+
+    pub fn suggest_class(self, _arch: InlineAsmArch, _ty: InlineAsmType) -> Option<Self> {
+        None
+    }
+
+    pub fn suggest_modifier(
+        self,
+        _arch: InlineAsmArch,
+        _ty: InlineAsmType,
+    ) -> Option<(char, &'static str)> {
+        None
+    }
+
+    pub fn default_modifier(self, _arch: InlineAsmArch) -> Option<(char, &'static str)> {
+        None
+    }
+
+    pub fn supported_types(
+        self,
+        arch: InlineAsmArch,
+    ) -> &'static [(InlineAsmType, Option<Symbol>)] {
+        match (self, arch) {
+            (Self::reg, _) => types! { _: I8, I16, I32, I64; },
+            (Self::freg, _) => types! { _: F32, F64; },
+        }
+    }
+}
+
+def_regs! {
+    S390x S390xInlineAsmReg S390xInlineAsmRegClass {
+        r0: reg = ["r0"],
+        r1: reg = ["r1"],
+        r2: reg = ["r2"],
+        r3: reg = ["r3"],
+        r4: reg = ["r4"],
+        r5: reg = ["r5"],
+        r6: reg = ["r6"],
+        r7: reg = ["r7"],
+        r8: reg = ["r8"],
+        r9: reg = ["r9"],
+        r10: reg = ["r10"],
+        r12: reg = ["r12"],
+        r13: reg = ["r13"],
+        r14: reg = ["r14"],
+        f0: freg = ["f0"],
+        f1: freg = ["f1"],
+        f2: freg = ["f2"],
+        f3: freg = ["f3"],
+        f4: freg = ["f4"],
+        f5: freg = ["f5"],
+        f6: freg = ["f6"],
+        f7: freg = ["f7"],
+        f8: freg = ["f8"],
+        f9: freg = ["f9"],
+        f10: freg = ["f10"],
+        f11: freg = ["f11"],
+        f12: freg = ["f12"],
+        f13: freg = ["f13"],
+        f14: freg = ["f14"],
+        f15: freg = ["f15"],
+        #error = ["r11"] =>
+            "The frame pointer cannot be used as an operand for inline asm",
+        #error = ["r15"] =>
+            "The stack pointer cannot be used as an operand for inline asm",
+        #error = [
+            "c0", "c1", "c2", "c3",
+            "c4", "c5", "c6", "c7",
+            "c8", "c9", "c10", "c11",
+            "c12", "c13", "c14", "c15"
+        ] =>
+            "control registers are reserved by the kernel and cannot be used as operands for inline asm",
+        #error = [
+            "a0", "a1", "a2", "a3",
+            "a4", "a5", "a6", "a7",
+            "a8", "a9", "a10", "a11",
+            "a12", "a13", "a14", "a15"
+        ] =>
+            "access registers are not supported and cannot be used as operands for inline asm",
+    }
+}
+
+impl S390xInlineAsmReg {
+    pub fn emit(
+        self,
+        out: &mut dyn fmt::Write,
+        _arch: InlineAsmArch,
+        _modifier: Option<char>,
+    ) -> fmt::Result {
+        write!(out, "%{}", self.name())
+    }
+}