1 files changed, 72 insertions, 0 deletions
diff --git a/src/cmd/asm/internal/arch/mips.go b/src/cmd/asm/internal/arch/mips.go
new file mode 100644
index 0000000..5d71f40
--- /dev/null
+++ b/src/cmd/asm/internal/arch/mips.go
@@ -0,0 +1,72 @@
+// Copyright 2015 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
+// MIPS (MIPS64) instruction set, to minimize its interaction
+// with the core of the assembler.
+
+package arch
+
+import (
+	"cmd/internal/obj"
+	"cmd/internal/obj/mips"
+)
+
+func jumpMIPS(word string) bool {
+	switch word {
+	case "BEQ", "BFPF", "BFPT", "BGEZ", "BGEZAL", "BGTZ", "BLEZ", "BLTZ", "BLTZAL", "BNE", "JMP", "JAL", "CALL":
+		return true
+	}
+	return false
+}
+
+// IsMIPSCMP reports whether the op (as defined by an mips.A* constant) is
+// one of the CMP instructions that require special handling.
+func IsMIPSCMP(op obj.As) bool {
+	switch op {
+	case mips.ACMPEQF, mips.ACMPEQD, mips.ACMPGEF, mips.ACMPGED,
+		mips.ACMPGTF, mips.ACMPGTD:
+		return true
+	}
+	return false
+}
+
+// IsMIPSMUL reports whether the op (as defined by an mips.A* constant) is
+// one of the MUL/DIV/REM/MADD/MSUB instructions that require special handling.
+func IsMIPSMUL(op obj.As) bool {
+	switch op {
+	case mips.AMUL, mips.AMULU, mips.AMULV, mips.AMULVU,
+		mips.ADIV, mips.ADIVU, mips.ADIVV, mips.ADIVVU,
+		mips.AREM, mips.AREMU, mips.AREMV, mips.AREMVU,
+		mips.AMADD, mips.AMSUB:
+		return true
+	}
+	return false
+}
+
+func mipsRegisterNumber(name string, n int16) (int16, bool) {
+	switch name {
+	case "F":
+		if 0 <= n && n <= 31 {
+			return mips.REG_F0 + n, true
+		}
+	case "FCR":
+		if 0 <= n && n <= 31 {
+			return mips.REG_FCR0 + n, true
+		}
+	case "M":
+		if 0 <= n && n <= 31 {
+			return mips.REG_M0 + n, true
+		}
+	case "R":
+		if 0 <= n && n <= 31 {
+			return mips.REG_R0 + n, true
+		}
+	case "W":
+		if 0 <= n && n <= 31 {
+			return mips.REG_W0 + n, true
+		}
+	}
+	return 0, false
+}