The JMCR characteristics are:
A Jazelle register, which provides control of the Jazelle extension.
This register is present only when AArch32 is supported. Otherwise, direct accesses to JMCR are UNDEFINED.
JMCR 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/WI |
Reserved, RAZ/WI.
For accesses from EL0 it is IMPLEMENTATION DEFINED whether the register is RW or UNDEFINED.
Accesses to this register use the following encodings in the System register encoding space:
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1110 | 0b111 | 0b0010 | 0b0000 | 0b000 |
if PSTATE.EL == EL0 then if boolean IMPLEMENTATION_DEFINED "JMCR UNDEFINED at EL0" then UNDEFINED; else R[t] = JMCR; elsif PSTATE.EL == EL1 then R[t] = JMCR; elsif PSTATE.EL == EL2 then R[t] = JMCR; elsif PSTATE.EL == EL3 then R[t] = JMCR;
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1110 | 0b111 | 0b0010 | 0b0000 | 0b000 |
if PSTATE.EL == EL0 then if boolean IMPLEMENTATION_DEFINED "JMCR UNDEFINED at EL0" then UNDEFINED; else return; elsif PSTATE.EL == EL1 then return; elsif PSTATE.EL == EL2 then return; elsif PSTATE.EL == EL3 then return;
26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6
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