Try out mips3

target/device/AMD/DBAu1500/uClibc.config.mipsel

@@ -29,9 +29,9 @@ ARCH_SUPPORTS_LITTLE_ENDIAN=y
 TARGET_ARCH="mips"
 ARCH_CFLAGS="-mno-split-addresses"
 ARCH_SUPPORTS_BIG_ENDIAN=y
-CONFIG_MIPS_ISA_1=y
+# CONFIG_MIPS_ISA_1 is not set
 # CONFIG_MIPS_ISA_2 is not set
-# CONFIG_MIPS_ISA_3 is not set
+CONFIG_MIPS_ISA_3=y
 # CONFIG_MIPS_ISA_4 is not set
 # CONFIG_MIPS_ISA_MIPS32 is not set
 # CONFIG_MIPS_ISA_MIPS64 is not set