target/riscv: vector floating-point min/max instructions

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20200701152549.1218-38-zhiwei_liu@c-sky.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 0d58c4c..854ff9a 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -492,6 +492,10 @@
 vfwnmsac_vv     111111 . ..... ..... 001 ..... 1010111 @r_vm
 vfwnmsac_vf     111111 . ..... ..... 101 ..... 1010111 @r_vm
 vfsqrt_v        100011 . ..... 00000 001 ..... 1010111 @r2_vm
+vfmin_vv        000100 . ..... ..... 001 ..... 1010111 @r_vm
+vfmin_vf        000100 . ..... ..... 101 ..... 1010111 @r_vm
+vfmax_vv        000110 . ..... ..... 001 ..... 1010111 @r_vm
+vfmax_vf        000110 . ..... ..... 101 ..... 1010111 @r_vm
 
 vsetvli         0 ........... ..... 111 ..... 1010111  @r2_zimm
 vsetvl          1000000 ..... ..... 111 ..... 1010111  @r