target/arm: Define syndrome function for MOPS exceptions

The FEAT_MOPS memory operations can raise a Memory Copy or Memory Set
exception if a copy or set instruction is executed when the CPU
register state is not correct for that instruction. Define the
usual syn_* function that constructs the syndrome register value
for these exceptions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230912140434.1333369-5-peter.maydell@linaro.org

target/arm/syndrome.h

@@ -58,6 +58,7 @@ enum arm_exception_class {
     EC_DATAABORT              = 0x24,
     EC_DATAABORT_SAME_EL      = 0x25,
     EC_SPALIGNMENT            = 0x26,
+    EC_MOP                    = 0x27,
     EC_AA32_FPTRAP            = 0x28,
     EC_AA64_FPTRAP            = 0x2c,
     EC_SERROR                 = 0x2f,
@@ -334,4 +335,15 @@ static inline uint32_t syn_serror(uint32_t extra)
     return (EC_SERROR << ARM_EL_EC_SHIFT) | ARM_EL_IL | extra;
 }
 
+static inline uint32_t syn_mop(bool is_set, bool is_setg, int options,
+                               bool epilogue, bool wrong_option, bool option_a,
+                               int destreg, int srcreg, int sizereg)
+{
+    return (EC_MOP << ARM_EL_EC_SHIFT) | ARM_EL_IL |
+        (is_set << 24) | (is_setg << 23) | (options << 19) |
+        (epilogue << 18) | (wrong_option << 17) | (option_a << 16) |
+        (destreg << 10) | (srcreg << 5) | sizereg;
+}
+
+
 #endif /* TARGET_ARM_SYNDROME_H */