From: Alexander Graf <agraf@xxxxxxx>
This adds 2-src variable shift register instructions:
C5.6.115 LSLV, C5.6.118 LSRV, C5.6.17 ASRV, C5.6.154 RORV
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
[claudio: adapted to new decoder, use enums for shift types]
Signed-off-by: Claudio Fontana <claudio.fontana@xxxxxxxxxx>
Signed-off-by: Peter Maydell <peter.maydell@xxxxxxxxxx>
---
target-arm/translate-a64.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index 43725a9..c2d0308 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -1038,6 +1038,20 @@ static void handle_div(DisasContext *s, bool is_signed, unsigned int sf,
}
}
+/* C5.6.115 LSLV, C5.6.118 LSRV, C5.6.17 ASRV, C5.6.154 RORV */
+static void handle_shift_reg(DisasContext *s,
+ enum a64_shift_type shift_type, unsigned int sf,
+ unsigned int rm, unsigned int rn, unsigned int rd)
+{
+ TCGv_i64 tcg_shift = tcg_temp_new_i64();
+ TCGv_i64 tcg_rd = cpu_reg(s, rd);
+ TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf);
+
+ tcg_gen_andi_i64(tcg_shift, cpu_reg(s, rm), sf ? 63 : 31);
+ shift_reg(tcg_rd, tcg_rn, sf, shift_type, tcg_shift);
+ tcg_temp_free_i64(tcg_shift);
+}
+
/* C3.5.8 Data-processing (2 source)
* 31 30 29 28 21 20 16 15 10 9 5 4 0
* +----+---+---+-----------------+------+--------+------+------+
@@ -1066,9 +1080,17 @@ static void disas_data_proc_2src(DisasContext *s, uint32_t insn)
handle_div(s, TRUE, sf, rm, rn, rd);
break;
case 8: /* LSLV */
+ handle_shift_reg(s, A64_SHIFT_TYPE_LSL, sf, rm, rn, rd);
+ break;
case 9: /* LSRV */
+ handle_shift_reg(s, A64_SHIFT_TYPE_LSR, sf, rm, rn, rd);
+ break;
case 10: /* ASRV */
+ handle_shift_reg(s, A64_SHIFT_TYPE_ASR, sf, rm, rn, rd);
+ break;
case 11: /* RORV */
+ handle_shift_reg(s, A64_SHIFT_TYPE_ROR, sf, rm, rn, rd);
+ break;
case 16:
case 17:
case 18:
--
1.7.9.5
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