Implement various SVE2 Right Shift intrinsics (#116914)

Includes:
* ShiftRightAndInsert
* ShiftRightArithmeticAdd
* ShiftRightArithmeticNarrowingSaturateEven
* ShiftRightArithmeticNarrowingSaturateOdd
* ShiftRightArithmeticNarrowingSaturateUnsignedEven
* ShiftRightArithmeticNarrowingSaturateUnsignedOdd
* ShiftRightArithmeticRounded
* ShiftRightArithmeticRoundedAdd
* ShiftRightArithmeticRoundedNarrowingSaturateEven
* ShiftRightArithmeticRoundedNarrowingSaturateOdd
* ShiftRightArithmeticRoundedNarrowingSaturateUnsignedEven
* ShiftRightArithmeticRoundedNarrowingSaturateUnsignedOdd
* ShiftRightLogicalAdd
* ShiftRightLogicalNarrowingEven
* ShiftRightLogicalNarrowingOdd
* ShiftRightLogicalRounded
* ShiftRightLogicalRoundedAdd
* ShiftRightLogicalRoundedNarrowingEven
* ShiftRightLogicalRoundedNarrowingOdd
* ShiftRightLogicalRoundedNarrowingSaturateOdd
* ShiftRightLogicalRoundedNarrowingSaturateEven

Author: snickolls-arm

src/coreclr/jit/hwintrinsiclistarm64sve.h

@@ -330,12 +330,33 @@ HARDWARE_INTRINSIC(Sve2,          ShiftArithmeticRounded,
 HARDWARE_INTRINSIC(Sve2,          ShiftArithmeticRoundedSaturate,                                   -1,      -1,    {INS_sve_sqrshl,     INS_invalid,        INS_sve_sqrshl,     INS_invalid,        INS_sve_sqrshl,     INS_invalid,        INS_sve_sqrshl,     INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_HasRMWSemantics|HW_Flag_LowMaskedOperation)
 HARDWARE_INTRINSIC(Sve2,          ShiftArithmeticSaturate,                                          -1,      -1,    {INS_sve_sqshl,      INS_invalid,        INS_sve_sqshl,      INS_invalid,        INS_sve_sqshl,      INS_invalid,        INS_sve_sqshl,      INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_HasRMWSemantics|HW_Flag_LowMaskedOperation)
 HARDWARE_INTRINSIC(Sve2,          ShiftLeftAndInsert,                                               -1,      3,     {INS_sve_sli,        INS_sve_sli,        INS_sve_sli,        INS_sve_sli,        INS_sve_sli,        INS_sve_sli,        INS_sve_sli,        INS_sve_sli,        INS_invalid,        INS_invalid},     HW_Category_ShiftLeftByImmediate,  HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
-HARDWARE_INTRINSIC(Sve2,          ShiftLeftLogicalSaturate,                                         -1,      -1,    {INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_HasRMWSemantics)
-HARDWARE_INTRINSIC(Sve2,          ShiftLeftLogicalSaturateUnsigned,                                 -1,      -1,    {INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_invalid},     HW_Category_ShiftLeftByImmediate,  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftLeftLogicalSaturate,                                         -1,      -1,    {INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_sve_uqshl,      INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_LowMaskedOperation|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftLeftLogicalSaturateUnsigned,                                 -1,      -1,    {INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_sve_sqshlu,     INS_invalid,        INS_invalid},     HW_Category_ShiftLeftByImmediate,  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_LowMaskedOperation|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
 HARDWARE_INTRINSIC(Sve2,          ShiftLeftLogicalWideningEven,                                     -1,      2,     {INS_invalid,        INS_invalid,        INS_sve_sshllb,     INS_sve_ushllb,     INS_sve_sshllb,     INS_sve_ushllb,     INS_sve_sshllb,     INS_sve_ushllb,     INS_invalid,        INS_invalid},     HW_Category_ShiftLeftByImmediate,  HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
 HARDWARE_INTRINSIC(Sve2,          ShiftLeftLogicalWideningOdd,                                      -1,      2,     {INS_invalid,        INS_invalid,        INS_sve_sshllt,     INS_sve_ushllt,     INS_sve_sshllt,     INS_sve_ushllt,     INS_sve_sshllt,     INS_sve_ushllt,     INS_invalid,        INS_invalid},     HW_Category_ShiftLeftByImmediate,  HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
 HARDWARE_INTRINSIC(Sve2,          ShiftLogicalRounded,                                              -1,      -1,    {INS_invalid,        INS_sve_urshl,      INS_invalid,        INS_sve_urshl,      INS_invalid,        INS_sve_urshl,      INS_invalid,        INS_sve_urshl,      INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_LowMaskedOperation|HW_Flag_HasRMWSemantics)
 HARDWARE_INTRINSIC(Sve2,          ShiftLogicalRoundedSaturate,                                      -1,      -1,    {INS_invalid,        INS_sve_uqrshl,     INS_invalid,        INS_sve_uqrshl,     INS_invalid,        INS_sve_uqrshl,     INS_invalid,        INS_sve_uqrshl,     INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_LowMaskedOperation|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightAndInsert,                                              -1,      3,     {INS_sve_sri,        INS_sve_sri,        INS_sve_sri,        INS_sve_sri,        INS_sve_sri,        INS_sve_sri,        INS_sve_sri,        INS_sve_sri,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticAdd,                                          -1,      3,     {INS_sve_ssra,       INS_invalid,        INS_sve_ssra,       INS_invalid,        INS_sve_ssra,       INS_invalid,        INS_sve_ssra,       INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticNarrowingSaturateEven,                        -1,      2,     {INS_sve_sqshrnb,    INS_sve_uqshrnb,    INS_sve_sqshrnb,    INS_sve_uqshrnb,    INS_sve_sqshrnb,    INS_sve_uqshrnb,    INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticNarrowingSaturateOdd,                         -1,      3,     {INS_sve_sqshrnt,    INS_sve_uqshrnt,    INS_sve_sqshrnt,    INS_sve_uqshrnt,    INS_sve_sqshrnt,    INS_sve_uqshrnt,    INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticNarrowingSaturateUnsignedEven,                -1,      2,     {INS_invalid,        INS_sve_sqshrunb,   INS_invalid,        INS_sve_sqshrunb,   INS_invalid,        INS_sve_sqshrunb,   INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticNarrowingSaturateUnsignedOdd,                 -1,      3,     {INS_invalid,        INS_sve_sqshrunt,   INS_invalid,        INS_sve_sqshrunt,   INS_invalid,        INS_sve_sqshrunt,   INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticRounded,                                      -1,      -1,    {INS_sve_srshr,      INS_invalid,        INS_sve_srshr,      INS_invalid,        INS_sve_srshr,      INS_invalid,        INS_sve_srshr,      INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_LowMaskedOperation|HW_Flag_HasRMWSemantics|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticRoundedAdd,                                   -1,      3,     {INS_sve_srsra,      INS_invalid,        INS_sve_srsra,      INS_invalid,        INS_sve_srsra,      INS_invalid,        INS_sve_srsra,      INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticRoundedNarrowingSaturateEven,                 -1,      2,     {INS_sve_sqrshrnb,   INS_invalid,        INS_sve_sqrshrnb,   INS_invalid,        INS_sve_sqrshrnb,   INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticRoundedNarrowingSaturateOdd,                  -1,      3,     {INS_sve_sqrshrnt,   INS_invalid,        INS_sve_sqrshrnt,   INS_invalid,        INS_sve_sqrshrnt,   INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticRoundedNarrowingSaturateUnsignedEven,         -1,      2,     {INS_invalid,        INS_sve_sqrshrunb,  INS_invalid,        INS_sve_sqrshrunb,  INS_invalid,        INS_sve_sqrshrunb,  INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightArithmeticRoundedNarrowingSaturateUnsignedOdd,          -1,      3,     {INS_invalid,        INS_sve_sqrshrunt,  INS_invalid,        INS_sve_sqrshrunt,  INS_invalid,        INS_sve_sqrshrunt,  INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalAdd,                                             -1,      3,     {INS_invalid,        INS_sve_usra,       INS_invalid,        INS_sve_usra,       INS_invalid,        INS_sve_usra,       INS_invalid,        INS_sve_usra,       INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalNarrowingEven,                                   -1,      2,     {INS_sve_shrnb,      INS_sve_shrnb,      INS_sve_shrnb,      INS_sve_shrnb,      INS_sve_shrnb,      INS_sve_shrnb,      INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalNarrowingOdd,                                    -1,      3,     {INS_sve_shrnt,      INS_sve_shrnt,      INS_sve_shrnt,      INS_sve_shrnt,      INS_sve_shrnt,      INS_sve_shrnt,      INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalRounded,                                         -1,      -1,    {INS_invalid,        INS_sve_urshr,      INS_invalid,        INS_sve_urshr,      INS_invalid,        INS_sve_urshr,      INS_invalid,        INS_sve_urshr,      INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_EmbeddedMaskedOperation|HW_Flag_LowMaskedOperation|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalRoundedAdd,                                      -1,      3,     {INS_invalid,        INS_sve_ursra,      INS_invalid,        INS_sve_ursra,      INS_invalid,        INS_sve_ursra,      INS_invalid,        INS_sve_ursra,      INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalRoundedNarrowingEven,                            -1,      2,     {INS_sve_rshrnb,     INS_sve_rshrnb,     INS_sve_rshrnb,     INS_sve_rshrnb,     INS_sve_rshrnb,     INS_sve_rshrnb,     INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalRoundedNarrowingOdd,                             -1,      3,     {INS_sve_rshrnt,     INS_sve_rshrnt,     INS_sve_rshrnt,     INS_sve_rshrnt,     INS_sve_rshrnt,     INS_sve_rshrnt,     INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalRoundedNarrowingSaturateEven,                    -1,      2,     {INS_invalid,        INS_sve_uqrshrnb,   INS_invalid,        INS_sve_uqrshrnb,   INS_invalid,        INS_sve_uqrshrnb,   INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand)
+HARDWARE_INTRINSIC(Sve2,          ShiftRightLogicalRoundedNarrowingSaturateOdd,                     -1,      3,     {INS_invalid,        INS_sve_uqrshrnt,   INS_invalid,        INS_sve_uqrshrnt,   INS_invalid,        INS_sve_uqrshrnt,   INS_invalid,        INS_invalid,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasImmediateOperand|HW_Flag_HasRMWSemantics)
 HARDWARE_INTRINSIC(Sve2,          Xor,                                                              -1,      3,     {INS_sve_eor3,       INS_sve_eor3,       INS_sve_eor3,       INS_sve_eor3,       INS_sve_eor3,       INS_sve_eor3,       INS_sve_eor3,       INS_sve_eor3,       INS_invalid,        INS_invalid},     HW_Category_SIMD,                  HW_Flag_Scalable|HW_Flag_SpecialCodeGen|HW_Flag_HasRMWSemantics)
 HARDWARE_INTRINSIC(Sve2,          XorRotateRight,                                                   -1,      3,     {INS_sve_xar,        INS_sve_xar,        INS_sve_xar,        INS_sve_xar,        INS_sve_xar,        INS_sve_xar,        INS_sve_xar,        INS_sve_xar,        INS_invalid,        INS_invalid},     HW_Category_ShiftRightByImmediate, HW_Flag_Scalable|HW_Flag_HasRMWSemantics|HW_Flag_HasImmediateOperand)
 #define LAST_NI_Sve2              NI_Sve2_XorRotateRight