MIPS: uasm: Add wsbh uasm instruction

It will be used later on by bpf-jit

[ralf@linux-mips.org: Resolved conflict.]

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/6732/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/uasm.h

@@ -157,6 +157,7 @@ Ip_0(_tlbr);
 Ip_0(_tlbwi);
 Ip_0(_tlbwr);
 Ip_u1(_wait);
+Ip_u2u1(_wsbh);
 Ip_u3u1u2(_xor);
 Ip_u2u1u3(_xori);
 Ip_u2u1(_yield);

arch/mips/include/uapi/asm/inst.h

@@ -205,6 +205,16 @@ enum lx_func {
 	lbx_op	= 0x16,
 };
 
+/*
+ * BSHFL opcodes
+ */
+enum bshfl_func {
+	wsbh_op = 0x2,
+	dshd_op = 0x5,
+	seb_op  = 0x10,
+	seh_op  = 0x18,
+};
+
 /*
  * (microMIPS) Major opcodes.
  */
@@ -258,6 +268,7 @@ enum mm_32a_minor_op {
 	mm_lwxs_op = 0x118,
 	mm_addu32_op = 0x150,
 	mm_subu32_op = 0x1d0,
+	mm_wsbh_op = 0x1ec,
 	mm_and_op = 0x250,
 	mm_or32_op = 0x290,
 	mm_xor32_op = 0x310,

arch/mips/mm/uasm-micromips.c

@@ -112,6 +112,7 @@ static struct insn insn_table_MM[] = {
 	{ insn_tlbwi, M(mm_pool32a_op, 0, 0, 0, mm_tlbwi_op, mm_pool32axf_op), 0 },
 	{ insn_tlbwr, M(mm_pool32a_op, 0, 0, 0, mm_tlbwr_op, mm_pool32axf_op), 0 },
 	{ insn_wait, M(mm_pool32a_op, 0, 0, 0, mm_wait_op, mm_pool32axf_op), SCIMM },
+	{ insn_wsbh, M(mm_pool32a_op, 0, 0, 0, mm_wsbh_op, mm_pool32axf_op), RT | RS },
 	{ insn_xor, M(mm_pool32a_op, 0, 0, 0, 0, mm_xor32_op), RT | RS | RD },
 	{ insn_xori, M(mm_xori32_op, 0, 0, 0, 0, 0), RT | RS | UIMM },
 	{ insn_dins, 0, 0 },

arch/mips/mm/uasm-mips.c

@@ -120,6 +120,7 @@ static struct insn insn_table[] = {
 	{ insn_tlbwi,  M(cop0_op, cop_op, 0, 0, 0, tlbwi_op),  0 },
 	{ insn_tlbwr,  M(cop0_op, cop_op, 0, 0, 0, tlbwr_op),  0 },
 	{ insn_wait, M(cop0_op, cop_op, 0, 0, 0, wait_op), SCIMM },
+	{ insn_wsbh, M(spec3_op, 0, 0, 0, wsbh_op, bshfl_op), RT | RD },
 	{ insn_xori,  M(xori_op, 0, 0, 0, 0, 0),  RS | RT | UIMM },
 	{ insn_xor,  M(spec_op, 0, 0, 0, 0, xor_op),  RS | RT | RD },
 	{ insn_yield, M(spec3_op, 0, 0, 0, 0, yield_op), RS | RD },

arch/mips/mm/uasm.c

@@ -55,7 +55,7 @@ enum opcode {
 	insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll, insn_sllv, insn_sltiu,
 	insn_sltu, insn_sra, insn_srl, insn_srlv, insn_subu, insn_sw, insn_sync,
 	insn_syscall, insn_tlbp, insn_tlbr, insn_tlbwi, insn_tlbwr, insn_wait,
-	insn_xor, insn_xori, insn_yield,
+	insn_wsbh, insn_xor, insn_xori, insn_yield,
 };
 
 struct insn {
@@ -298,6 +298,7 @@ I_0(_tlbr)
 I_0(_tlbwi)
 I_0(_tlbwr)
 I_u1(_wait);
+I_u2u1(_wsbh)
 I_u3u1u2(_xor)
 I_u2u1u3(_xori)
 I_u2u1(_yield)