target/arm: Implement SVE Select Vectors Group

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180613015641.5667-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h
index c3f8a2b5021276f35fe179d003ed57cc1f1a0f2d..0f57f64895b107d7130e8a6c553ce26ae31bb666 100644 (file)
--- a/target/arm/helper-sve.h
+++ b/target/arm/helper-sve.h
@@ -195,6 +195,15 @@ DEF_HELPER_FLAGS_5(sve_lsl_zpzz_s, TCG_CALL_NO_RWG,
 DEF_HELPER_FLAGS_5(sve_lsl_zpzz_d, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_5(sve_sel_zpzz_b, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve_sel_zpzz_h, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve_sel_zpzz_s, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve_sel_zpzz_d, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_5(sve_asr_zpzw_b, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_5(sve_asr_zpzw_h, TCG_CALL_NO_RWG,

diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index a9fa6312522c0196428a4131a15d7ce17b81b606..91522d8e1370762c7506e78df43cb17adc5915de 100644 (file)
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -98,6 +98,7 @@
                 &rprr_esz rn=%reg_movprfx
 @rdm_pg_rn      ........ esz:2 ... ... ... pg:3 rn:5 rd:5 \
                 &rprr_esz rm=%reg_movprfx
+@rd_pg4_rn_rm   ........ esz:2 . rm:5  .. pg:4  rn:5 rd:5       &rprr_esz
 
 # Three register operand, with governing predicate, vector element size
 @rda_pg_rn_rm   ........ esz:2 . rm:5  ... pg:3 rn:5 rd:5 \
@@ -466,6 +467,11 @@ RBIT            00000101 .. 1001 11 100 ... ..... .....         @rd_pg_rn
 # SVE vector splice (predicated)
 SPLICE          00000101 .. 101 100 100 ... ..... .....         @rdn_pg_rm
 
+### SVE Select Vectors Group
+
+# SVE select vector elements (predicated)
+SEL_zpzz        00000101 .. 1 ..... 11 .... ..... .....         @rd_pg4_rn_rm
+
 ### SVE Predicate Logical Operations Group
 
 # SVE predicate logical operations

diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 8da7baad7645b9936323e28d7c93824af79d809b..f55fdc7dbef35f0ba1317d6ac83c33d2b22dc013 100644 (file)
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -2146,3 +2146,58 @@ void HELPER(sve_splice)(void *vd, void *vn, void *vm, void *vg, uint32_t desc)
     }
     swap_memmove(vd + len, vm, opr_sz * 8 - len);
 }
+
+void HELPER(sve_sel_zpzz_b)(void *vd, void *vn, void *vm,
+                            void *vg, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm;
+    uint8_t *pg = vg;
+
+    for (i = 0; i < opr_sz; i += 1) {
+        uint64_t nn = n[i], mm = m[i];
+        uint64_t pp = expand_pred_b(pg[H1(i)]);
+        d[i] = (nn & pp) | (mm & ~pp);
+    }
+}
+
+void HELPER(sve_sel_zpzz_h)(void *vd, void *vn, void *vm,
+                            void *vg, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm;
+    uint8_t *pg = vg;
+
+    for (i = 0; i < opr_sz; i += 1) {
+        uint64_t nn = n[i], mm = m[i];
+        uint64_t pp = expand_pred_h(pg[H1(i)]);
+        d[i] = (nn & pp) | (mm & ~pp);
+    }
+}
+
+void HELPER(sve_sel_zpzz_s)(void *vd, void *vn, void *vm,
+                            void *vg, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm;
+    uint8_t *pg = vg;
+
+    for (i = 0; i < opr_sz; i += 1) {
+        uint64_t nn = n[i], mm = m[i];
+        uint64_t pp = expand_pred_s(pg[H1(i)]);
+        d[i] = (nn & pp) | (mm & ~pp);
+    }
+}
+
+void HELPER(sve_sel_zpzz_d)(void *vd, void *vn, void *vm,
+                            void *vg, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm;
+    uint8_t *pg = vg;
+
+    for (i = 0; i < opr_sz; i += 1) {
+        uint64_t nn = n[i], mm = m[i];
+        d[i] = (pg[H1(i)] & 1 ? nn : mm);
+    }
+}

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 1517d82468b206f225a3c45edb9ca3fa29d95bcc..0de9118fdfb1ceec994dfd4d9532d54cb53d0356 100644 (file)
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -373,6 +373,8 @@ static bool trans_UDIV_zpzz(DisasContext *s, arg_rprr_esz *a, uint32_t insn)
     return do_zpzz_ool(s, a, fns[a->esz]);
 }
 
+DO_ZPZZ(SEL, sel)
+
 #undef DO_ZPZZ
 
 /*