mirror of https://github.com/proxmox/mirror_qemu
target-arm: A64: add support for ADR and ADRP
Add support for the instructions described in "C3.4.6 PC-rel. addressing" (ADR and ADRP). Signed-off-by: Alexander Graf <agraf@suse.de> [claudio: adapted to new decoder structure] Signed-off-by: Claudio Fontana <claudio.fontana@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>master
parent
832ffa1ce0
commit
15bfe8b650
|
@ -653,10 +653,31 @@ static void disas_ldst(DisasContext *s, uint32_t insn)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
/* PC-rel. addressing */
|
/* C3.4.6 PC-rel. addressing
|
||||||
|
* 31 30 29 28 24 23 5 4 0
|
||||||
|
* +----+-------+-----------+-------------------+------+
|
||||||
|
* | op | immlo | 1 0 0 0 0 | immhi | Rd |
|
||||||
|
* +----+-------+-----------+-------------------+------+
|
||||||
|
*/
|
||||||
static void disas_pc_rel_adr(DisasContext *s, uint32_t insn)
|
static void disas_pc_rel_adr(DisasContext *s, uint32_t insn)
|
||||||
{
|
{
|
||||||
unsupported_encoding(s, insn);
|
unsigned int page, rd;
|
||||||
|
uint64_t base;
|
||||||
|
int64_t offset;
|
||||||
|
|
||||||
|
page = extract32(insn, 31, 1);
|
||||||
|
/* SignExtend(immhi:immlo) -> offset */
|
||||||
|
offset = ((int64_t)sextract32(insn, 5, 19) << 2) | extract32(insn, 29, 2);
|
||||||
|
rd = extract32(insn, 0, 5);
|
||||||
|
base = s->pc - 4;
|
||||||
|
|
||||||
|
if (page) {
|
||||||
|
/* ADRP (page based) */
|
||||||
|
base &= ~0xfff;
|
||||||
|
offset <<= 12;
|
||||||
|
}
|
||||||
|
|
||||||
|
tcg_gen_movi_i64(cpu_reg(s, rd), base + offset);
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Add/subtract (immediate) */
|
/* Add/subtract (immediate) */
|
||||||
|
|
Loading…
Reference in New Issue