Jazelle ID Register
A Jazelle register, which identified the Jazelle architecture version.
This register is present only when FEAT_AA32 is implemented. Otherwise, direct accesses to JIDR are UNDEFINED.
JIDR is a 32-bit register.
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RAZ | |||||||||||||||||||||||||||||||
Reserved, RAZ.
Accesses to this register use the following encodings in the System register encoding space:
MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}
(coproc = 0b1110, opc1 = 0b111, CRn = 0b0000, CRm = 0b0000, opc2 = 0b000)
if !IsFeatureImplemented(FEAT_AA32) then UNDEFINED; elsif PSTATE.EL == EL0 then if boolean IMPLEMENTATION_DEFINED "JIDR UNDEFINED at EL0" then UNDEFINED; elsif EL2Enabled() && (IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2)) && !ELIsInHost(EL0) && HCR_EL2.TID0 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x05); elsif EL2Enabled() && (IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2)) && HCR.TID0 == '1' then AArch32.TakeHypTrapException(0x05); else R[t] = JIDR; elsif PSTATE.EL == EL1 then if EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && HCR_EL2.TID0 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x05); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HCR.TID0 == '1' then AArch32.TakeHypTrapException(0x05); else R[t] = JIDR; elsif PSTATE.EL == EL2 then R[t] = JIDR; elsif PSTATE.EL == EL3 then R[t] = JIDR;
Version 2025.09 — Copyright © 2010-2025 Arm Limited or its affiliates.
This site is provided as a community resource and is NOT affiliated with nor endorsed by Arm Limited.