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[v3,24/81] target/arm: Implement SVE2 bitwise shift right and accumulate

Message ID 20200918183751.2787647-25-richard.henderson@linaro.org
State Superseded
Headers show
Series target/arm: Implement SVE2 | expand

Commit Message

Richard Henderson Sept. 18, 2020, 6:36 p.m. UTC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/sve.decode      |  8 ++++++++
 target/arm/translate-sve.c | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
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Patch

diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index f4f0c2ade6..7783e9f0d3 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1253,3 +1253,11 @@  UABALT          01000101 .. 0 ..... 1100 11 ..... .....  @rda_rn_rm
 # ADC and SBC decoded via size in helper dispatch.
 ADCLB           01000101 .. 0 ..... 11010 0 ..... .....  @rda_rn_rm
 ADCLT           01000101 .. 0 ..... 11010 1 ..... .....  @rda_rn_rm
+
+## SVE2 bitwise shift right and accumulate
+
+# TODO: Use @rda and %reg_movprfx here.
+SSRA            01000101 .. 0 ..... 1110 00 ..... .....  @rd_rn_tszimm_shr
+USRA            01000101 .. 0 ..... 1110 01 ..... .....  @rd_rn_tszimm_shr
+SRSRA           01000101 .. 0 ..... 1110 10 ..... .....  @rd_rn_tszimm_shr
+URSRA           01000101 .. 0 ..... 1110 11 ..... .....  @rd_rn_tszimm_shr
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 4e23b6cedd..312a47f4b9 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -6404,3 +6404,37 @@  static bool trans_ADCLT(DisasContext *s, arg_rrrr_esz *a)
 {
     return do_adcl(s, a, true);
 }
+
+static bool do_sve2_fn2i(DisasContext *s, arg_rri_esz *a, GVecGen2iFn *fn)
+{
+    if (a->esz < 0 || !dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    if (sve_access_check(s)) {
+        unsigned vsz = vec_full_reg_size(s);
+        unsigned rd_ofs = vec_full_reg_offset(s, a->rd);
+        unsigned rn_ofs = vec_full_reg_offset(s, a->rn);
+        fn(a->esz, rd_ofs, rn_ofs, a->imm, vsz, vsz);
+    }
+    return true;
+}
+
+static bool trans_SSRA(DisasContext *s, arg_rri_esz *a)
+{
+    return do_sve2_fn2i(s, a, gen_gvec_ssra);
+}
+
+static bool trans_USRA(DisasContext *s, arg_rri_esz *a)
+{
+    return do_sve2_fn2i(s, a, gen_gvec_usra);
+}
+
+static bool trans_SRSRA(DisasContext *s, arg_rri_esz *a)
+{
+    return do_sve2_fn2i(s, a, gen_gvec_srsra);
+}
+
+static bool trans_URSRA(DisasContext *s, arg_rri_esz *a)
+{
+    return do_sve2_fn2i(s, a, gen_gvec_ursra);
+}