[PATCH v2 3/3] riscv: insn: add RV_EXTRACT_FUNCT3()

[Ben Dooks]

Add extraction for the func3 field of most instructions
for use with anyone who needs it.

Note, added this for decoding of CSR accesses for
work we did looking at the RDCYCLE v RDTIME calls.

Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
---
 arch/riscv/include/asm/insn.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/include/asm/insn.h b/arch/riscv/include/asm/insn.h
index 09fde95a5e8f..c67f44ff2066 100644
--- a/arch/riscv/include/asm/insn.h
+++ b/arch/riscv/include/asm/insn.h
@@ -299,6 +299,10 @@ static __always_inline bool riscv_insn_is_c_jalr(u32 code)
 	({typeof(x) x_ = (x); \
 	(RV_X(x_, RVG_RD_OPOFF, RVG_RD_MASK)); })
 
+#define RV_EXTRACT_FUNCT3(x) \
+	({typeof(x) x_ = (x); \
+	(RV_X(x_, RV_INSN_FUNCT3_OPOFF, RV_INSN_FUNCT3_MASK)); })
+
 #define RV_EXTRACT_UTYPE_IMM(x) \
 	({typeof(x) x_ = (x); \
 	(RV_X(x_, RV_U_IMM_31_12_OPOFF, RV_U_IMM_31_12_MASK)); })
-- 
2.37.2.352.g3c44437643