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target/arm: Implement the STGP instruction 

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-06-25 20:31:14 -07:00 committed by Peter Maydell
parent c15294c1e3
commit 6439d67fc9
1 changed files with 26 additions and 3 deletions
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29
target/arm/translate-a64.c
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@ -2690,7 +2690,7 @@ static void disas_ld_lit(DisasContext *s, uint32_t insn)
* +-----+-------+---+---+-------+---+-------+-------+------+------+
*
* opc: LDP/STP/LDNP/STNP 00 -> 32 bit, 10 -> 64 bit
* LDPSW 01
* LDPSW/STGP 01
* LDP/STP/LDNP/STNP (SIMD) 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit
* V: 0 -> GPR, 1 -> Vector
* idx: 00 -> signed offset with non-temporal hint, 01 -> post-index,
@ -2715,6 +2715,7 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
bool is_signed = false;
bool postindex = false;
bool wback = false;
bool set_tag = false;
TCGv_i64 clean_addr, dirty_addr;
@ -2727,6 +2728,14 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
if (is_vector) {
size = 2 + opc;
} else if (opc == 1 && !is_load) {
/* STGP */
if (!dc_isar_feature(aa64_mte_insn_reg, s) || index == 0) {
unallocated_encoding(s);
return;
}
size = 3;
set_tag = true;
} else {
size = 2 + extract32(opc, 1, 1);
is_signed = extract32(opc, 0, 1);
@ -2767,7 +2776,7 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
return;
}
offset <<= size;
offset <<= (set_tag ? LOG2_TAG_GRANULE : size);
if (rn == 31) {
gen_check_sp_alignment(s);
@ -2777,8 +2786,22 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
if (!postindex) {
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
}
clean_addr = clean_data_tbi(s, dirty_addr);
if (set_tag) {
if (!s->ata) {
/*
* TODO: We could rely on the stores below, at least for
* system mode, if we arrange to add MO_ALIGN_16.
*/
gen_helper_stg_stub(cpu_env, dirty_addr);
} else if (tb_cflags(s->base.tb) & CF_PARALLEL) {
gen_helper_stg_parallel(cpu_env, dirty_addr, dirty_addr);
} else {
gen_helper_stg(cpu_env, dirty_addr, dirty_addr);
}
}
clean_addr = clean_data_tbi(s, dirty_addr);
if (is_vector) {
if (is_load) {
do_fp_ld(s, rt, clean_addr, size);