target/arm: Implement SVE2 gather load insns

Add decoding logic for SVE2 64-bit/32-bit gather non-temporal
load insns.

64-bit
* LDNT1SB
* LDNT1B (vector plus scalar)
* LDNT1SH
* LDNT1H (vector plus scalar)
* LDNT1SW
* LDNT1W (vector plus scalar)
* LDNT1D (vector plus scalar)

32-bit
* LDNT1SB
* LDNT1B (vector plus scalar)
* LDNT1SH
* LDNT1H (vector plus scalar)
* LDNT1W (vector plus scalar)

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stephen Long <steplong@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525010358.152808-46-richard.henderson@linaro.org
Message-Id: <20200422152343.12493-1-steplong@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index 5cfe6df0d2401e86b2a555931241db3246859abb..c3958bed6ac6efb5c8f5010d6e9e556186ee76f0 100644 (file)
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1389,6 +1389,17 @@ UMLSLT_zzzw     01000100 .. 0 ..... 010 111 ..... .....  @rda_rn_rm
 CMLA_zzzz       01000100 esz:2 0 rm:5 0010 rot:2 rn:5 rd:5  ra=%reg_movprfx
 SQRDCMLAH_zzzz  01000100 esz:2 0 rm:5 0011 rot:2 rn:5 rd:5  ra=%reg_movprfx
 
+### SVE2 Memory Gather Load Group
+
+# SVE2 64-bit gather non-temporal load
+#   (scalar plus unpacked 32-bit unscaled offsets)
+LDNT1_zprz      1100010 msz:2 00 rm:5 1 u:1 0 pg:3 rn:5 rd:5 \
+                &rprr_gather_load xs=0 esz=3 scale=0 ff=0
+
+# SVE2 32-bit gather non-temporal load (scalar plus 32-bit unscaled offsets)
+LDNT1_zprz      1000010 msz:2 00 rm:5 10 u:1 pg:3 rn:5 rd:5 \
+                &rprr_gather_load xs=0 esz=2 scale=0 ff=0
+
 ### SVE2 Memory Store Group
 
 # SVE2 64-bit scatter non-temporal store (vector plus scalar)

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index ac43bb02be31575badcd9a4d88489dec51746b17..a64ad04c5025c1201adbb2505f827b7ad4f7481a 100644 (file)
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -6015,6 +6015,14 @@ static bool trans_LD1_zpiz(DisasContext *s, arg_LD1_zpiz *a)
     return true;
 }
 
+static bool trans_LDNT1_zprz(DisasContext *s, arg_LD1_zprz *a)
+{
+    if (!dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    return trans_LD1_zprz(s, a);
+}
+
 /* Indexed by [mte][be][xs][msz].  */
 static gen_helper_gvec_mem_scatter * const scatter_store_fn32[2][2][2][3] = {
     { /* MTE Inactive */