diff options
Diffstat (limited to 'gas/config/tc-aarch64.c')
| -rw-r--r-- | gas/config/tc-aarch64.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c index ce597051..47c27fe 100644 --- a/gas/config/tc-aarch64.c +++ b/gas/config/tc-aarch64.c @@ -3197,10 +3197,14 @@ parse_sys_reg (char **str, struct hash_control *sys_regs, int imple_defined_p) unsigned int op0, op1, cn, cm, op2; if (sscanf (buf, "s%u_%u_c%u_c%u_%u", &op0, &op1, &cn, &cm, &op2) != 5) return PARSE_FAIL; - /* Register access is encoded as follows: + /* The architecture specifies the encoding space for implementation + defined registers as: op0 op1 CRn CRm op2 - 11 xxx 1x11 xxxx xxx. */ - if (op0 != 3 || op1 > 7 || (cn | 0x4) != 0xf || cm > 15 || op2 > 7) + 11 xxx 1x11 xxxx xxx + For convenience GAS accepts a wider encoding space, as follows: + op0 op1 CRn CRm op2 + 11 xxx xxxx xxxx xxx */ + if (op0 != 3 || op1 > 7 || cn > 15 || cm > 15 || op2 > 7) return PARSE_FAIL; value = (op0 << 14) | (op1 << 11) | (cn << 7) | (cm << 3) | op2; } |