[PATCH v3 72/81] target/arm: Implement SVE2 FCVTLT

[Richard Henderson]

From: Stephen Long <steplong@quicinc.com>

Signed-off-by: Stephen Long <steplong@quicinc.com>
Message-Id: <20200428174332.17162-3-steplong@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-sve.h    |  5 +++++
 target/arm/sve.decode      |  2 ++
 target/arm/sve_helper.c    | 23 +++++++++++++++++++++++
 target/arm/translate-sve.c | 16 ++++++++++++++++
 4 files changed, 46 insertions(+)

diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h
index 0d8667a7d1..df141aec41 100644
--- a/target/arm/helper-sve.h
+++ b/target/arm/helper-sve.h
@@ -2739,3 +2739,8 @@ DEF_HELPER_FLAGS_5(sve2_fcvtnt_sh, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_5(sve2_fcvtnt_ds, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_5(sve2_fcvtlt_hs, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve2_fcvtlt_sd, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, i32)
diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index 9ba4bb476e..abe26f2424 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1576,4 +1576,6 @@ RAX1            01000101 00 1 ..... 11110 1 ..... .....  
@rd_rn_rm_e0
 
 ### SVE2 floating-point convert precision odd elements
 FCVTNT_sh       01100100 10 0010 00 101 ... ..... .....  @rd_pg_rn_e0
+FCVTLT_hs       01100100 10 0010 01 101 ... ..... .....  @rd_pg_rn_e0
 FCVTNT_ds       01100100 11 0010 10 101 ... ..... .....  @rd_pg_rn_e0
+FCVTLT_sd       01100100 11 0010 11 101 ... ..... .....  @rd_pg_rn_e0
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 21023c2f7f..8539493c72 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -7614,3 +7614,26 @@ void HELPER(NAME)(void *vd, void *vn, void *vg, void 
*status, uint32_t desc)  \
 
 DO_FCVTNT(sve2_fcvtnt_sh, uint32_t, uint16_t, H1_4, H1_2, sve_f32_to_f16)
 DO_FCVTNT(sve2_fcvtnt_ds, uint64_t, uint32_t, H1_4, H1_2, float64_to_float32)
+
+#define DO_FCVTLT(NAME, TYPEW, TYPEN, HW, HN, OP)                             \
+void HELPER(NAME)(void *vd, void *vn, void *vg, void *status, uint32_t desc)  \
+{                                                                             \
+    intptr_t i = simd_oprsz(desc);                                            \
+    uint64_t *g = vg;                                                         \
+    do {                                                                      \
+        uint64_t pg = g[(i - 1) >> 6];                                        \
+        do {                                                                  \
+            i -= sizeof(TYPEW);                                               \
+            if (likely((pg >> (i & 63)) & 1)) {                               \
+                TYPEN nn = *(TYPEN *)(vn + HN(i + sizeof(TYPEN)));            \
+                *(TYPEW *)(vd + HW(i)) = OP(nn, status);                      \
+            }                                                                 \
+        } while (i & 63);                                                     \
+    } while (i != 0);                                                         \
+}
+
+DO_FCVTLT(sve2_fcvtlt_hs, uint32_t, uint16_t, H1_4, H1_2, sve_f16_to_f32)
+DO_FCVTLT(sve2_fcvtlt_sd, uint64_t, uint32_t, H1_4, H1_2, float32_to_float64)
+
+#undef DO_FCVTLT
+#undef DO_FCVTNT
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 8a3a646bf5..247288e164 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -8241,3 +8241,19 @@ static bool trans_FCVTNT_ds(DisasContext *s, arg_rpr_esz 
*a)
     }
     return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, 
gen_helper_sve2_fcvtnt_ds);
 }
+
+static bool trans_FCVTLT_hs(DisasContext *s, arg_rpr_esz *a)
+{
+    if (!dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, 
gen_helper_sve2_fcvtlt_hs);
+}
+
+static bool trans_FCVTLT_sd(DisasContext *s, arg_rpr_esz *a)
+{
+    if (!dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, 
gen_helper_sve2_fcvtlt_sd);
+}
-- 
2.25.1