1 files changed, 81 insertions, 0 deletions
diff --git a/src/cmd/asm/internal/arch/s390x.go b/src/cmd/asm/internal/arch/s390x.go
new file mode 100644
index 0000000..519d208
--- /dev/null
+++ b/src/cmd/asm/internal/arch/s390x.go
@@ -0,0 +1,81 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file encapsulates some of the odd characteristics of the
+// s390x instruction set, to minimize its interaction
+// with the core of the assembler.
+
+package arch
+
+import (
+	"cmd/internal/obj/s390x"
+)
+
+func jumpS390x(word string) bool {
+	switch word {
+	case "BRC",
+		"BC",
+		"BCL",
+		"BEQ",
+		"BGE",
+		"BGT",
+		"BL",
+		"BLE",
+		"BLEU",
+		"BLT",
+		"BLTU",
+		"BNE",
+		"BR",
+		"BVC",
+		"BVS",
+		"BRCT",
+		"BRCTG",
+		"CMPBEQ",
+		"CMPBGE",
+		"CMPBGT",
+		"CMPBLE",
+		"CMPBLT",
+		"CMPBNE",
+		"CMPUBEQ",
+		"CMPUBGE",
+		"CMPUBGT",
+		"CMPUBLE",
+		"CMPUBLT",
+		"CMPUBNE",
+		"CRJ",
+		"CGRJ",
+		"CLRJ",
+		"CLGRJ",
+		"CIJ",
+		"CGIJ",
+		"CLIJ",
+		"CLGIJ",
+		"CALL",
+		"JMP":
+		return true
+	}
+	return false
+}
+
+func s390xRegisterNumber(name string, n int16) (int16, bool) {
+	switch name {
+	case "AR":
+		if 0 <= n && n <= 15 {
+			return s390x.REG_AR0 + n, true
+		}
+	case "F":
+		if 0 <= n && n <= 15 {
+			return s390x.REG_F0 + n, true
+		}
+	case "R":
+		if 0 <= n && n <= 15 {
+			return s390x.REG_R0 + n, true
+		}
+	case "V":
+		if 0 <= n && n <= 31 {
+			return s390x.REG_V0 + n, true
+		}
+	}
+	return 0, false
+}