From 6f63405cb67bc4424cd7cada11783dcef0f8b3c2 Mon Sep 17 00:00:00 2001
From: James Hogan <james.hogan@imgtec.com>
Date: Thu, 23 Jun 2016 17:34:38 +0100
Subject: [PATCH] MIPS: uasm: Add r6 MUL encoding

Add the R6 MUL instruction encoding for 3 operand signed multiply to
uasm so that KVM can use uasm for generating its entry point code at
runtime on R6.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/mips/include/uapi/asm/inst.h | 44 +++++++++++++++++++++++++++++++
 arch/mips/mm/uasm-mips.c          |  4 +++
 2 files changed, 48 insertions(+)

diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h
index 6319c5037e66..fc96012c75d1 100644
--- a/arch/mips/include/uapi/asm/inst.h
+++ b/arch/mips/include/uapi/asm/inst.h
@@ -92,6 +92,50 @@ enum spec3_op {
 	rdhwr_op  = 0x3b
 };
 
+/*
+ * Bits 10-6 minor opcode for r6 spec mult/div encodings
+ */
+enum mult_op {
+	mult_mult_op = 0x0,
+	mult_mul_op = 0x2,
+	mult_muh_op = 0x3,
+};
+enum multu_op {
+	multu_multu_op = 0x0,
+	multu_mulu_op = 0x2,
+	multu_muhu_op = 0x3,
+};
+enum div_op {
+	div_div_op = 0x0,
+	div_div6_op = 0x2,
+	div_mod_op = 0x3,
+};
+enum divu_op {
+	divu_divu_op = 0x0,
+	divu_divu6_op = 0x2,
+	divu_modu_op = 0x3,
+};
+enum dmult_op {
+	dmult_dmult_op = 0x0,
+	dmult_dmul_op = 0x2,
+	dmult_dmuh_op = 0x3,
+};
+enum dmultu_op {
+	dmultu_dmultu_op = 0x0,
+	dmultu_dmulu_op = 0x2,
+	dmultu_dmuhu_op = 0x3,
+};
+enum ddiv_op {
+	ddiv_ddiv_op = 0x0,
+	ddiv_ddiv6_op = 0x2,
+	ddiv_dmod_op = 0x3,
+};
+enum ddivu_op {
+	ddivu_ddivu_op = 0x0,
+	ddivu_ddivu6_op = 0x2,
+	ddivu_dmodu_op = 0x3,
+};
+
 /*
  * rt field of bcond opcodes.
  */
diff --git a/arch/mips/mm/uasm-mips.c b/arch/mips/mm/uasm-mips.c
index 86a3c76a1ad8..cec524167822 100644
--- a/arch/mips/mm/uasm-mips.c
+++ b/arch/mips/mm/uasm-mips.c
@@ -121,7 +121,11 @@ static struct insn insn_table[] = {
 	{ insn_mthc0,  M(cop0_op, mthc0_op, 0, 0, 0, 0),  RT | RD | SET},
 	{ insn_mthi,  M(spec_op, 0, 0, 0, 0, mthi_op), RS },
 	{ insn_mtlo,  M(spec_op, 0, 0, 0, 0, mtlo_op), RS },
+#ifndef CONFIG_CPU_MIPSR6
 	{ insn_mul, M(spec2_op, 0, 0, 0, 0, mul_op), RS | RT | RD},
+#else
+	{ insn_mul, M(spec_op, 0, 0, 0, mult_mul_op, mult_op), RS | RT | RD},
+#endif
 	{ insn_ori,  M(ori_op, 0, 0, 0, 0, 0),	RS | RT | UIMM },
 	{ insn_or,  M(spec_op, 0, 0, 0, 0, or_op),  RS | RT | RD },
 #ifndef CONFIG_CPU_MIPSR6
-- 
2.20.1