[PULL 054/114] target/arm: Implement SVE2 bitwise ternary operations

[Peter Maydell <peter.maydell@linaro.org>]

From: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525010358.152808-33-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-sve.h    |   6 ++
 target/arm/sve.decode      |  12 +++
 target/arm/sve_helper.c    |  50 +++++++++
 target/arm/translate-sve.c | 213 +++++++++++++++++++++++++++++++++++++
 4 files changed, 281 insertions(+)

diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h
index 5bf9fdc7a36..df617e33513 100644
--- a/target/arm/helper-sve.h
+++ b/target/arm/helper-sve.h
@@ -2543,3 +2543,9 @@ DEF_HELPER_FLAGS_6(sve2_fminp_zpzz_s, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_6(sve2_fminp_zpzz_d, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_5(sve2_eor3, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve2_bcax, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve2_bsl1n, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve2_bsl2n, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_5(sve2_nbsl, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index f3659075180..bf673e2f164 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -124,6 +124,10 @@
 @rda_rn_rm      ........ esz:2 . rm:5 ... ... rn:5 rd:5 \
                 &rrrr_esz ra=%reg_movprfx
 
+# Four operand with unused vector element size
+@rdn_ra_rm_e0   ........ ... rm:5 ... ... ra:5 rd:5 \
+                &rrrr_esz esz=0 rn=%reg_movprfx
+
 # Three operand with "memory" size, aka immediate left shift
 @rd_rn_msz_rm   ........ ... rm:5 .... imm:2 rn:5 rd:5          &rrri
 
@@ -379,6 +383,14 @@ ORR_zzz         00000100 01 1 ..... 001 100 ..... .....         @rd_rn_rm_e0
 EOR_zzz         00000100 10 1 ..... 001 100 ..... .....         @rd_rn_rm_e0
 BIC_zzz         00000100 11 1 ..... 001 100 ..... .....         @rd_rn_rm_e0
 
+# SVE2 bitwise ternary operations
+EOR3            00000100 00 1 ..... 001 110 ..... .....         @rdn_ra_rm_e0
+BSL             00000100 00 1 ..... 001 111 ..... .....         @rdn_ra_rm_e0
+BCAX            00000100 01 1 ..... 001 110 ..... .....         @rdn_ra_rm_e0
+BSL1N           00000100 01 1 ..... 001 111 ..... .....         @rdn_ra_rm_e0
+BSL2N           00000100 10 1 ..... 001 111 ..... .....         @rdn_ra_rm_e0
+NBSL            00000100 11 1 ..... 001 111 ..... .....         @rdn_ra_rm_e0
+
 ### SVE Index Generation Group
 
 # SVE index generation (immediate start, immediate increment)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 74509776304..17889bc3160 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -6797,3 +6797,53 @@ DO_ST1_ZPZ_D(dd_be, zd, MO_64)
 
 #undef DO_ST1_ZPZ_S
 #undef DO_ST1_ZPZ_D
+
+void HELPER(sve2_eor3)(void *vd, void *vn, void *vm, void *vk, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm, *k = vk;
+
+    for (i = 0; i < opr_sz; ++i) {
+        d[i] = n[i] ^ m[i] ^ k[i];
+    }
+}
+
+void HELPER(sve2_bcax)(void *vd, void *vn, void *vm, void *vk, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm, *k = vk;
+
+    for (i = 0; i < opr_sz; ++i) {
+        d[i] = n[i] ^ (m[i] & ~k[i]);
+    }
+}
+
+void HELPER(sve2_bsl1n)(void *vd, void *vn, void *vm, void *vk, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm, *k = vk;
+
+    for (i = 0; i < opr_sz; ++i) {
+        d[i] = (~n[i] & k[i]) | (m[i] & ~k[i]);
+    }
+}
+
+void HELPER(sve2_bsl2n)(void *vd, void *vn, void *vm, void *vk, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm, *k = vk;
+
+    for (i = 0; i < opr_sz; ++i) {
+        d[i] = (n[i] & k[i]) | (~m[i] & ~k[i]);
+    }
+}
+
+void HELPER(sve2_nbsl)(void *vd, void *vn, void *vm, void *vk, uint32_t desc)
+{
+    intptr_t i, opr_sz = simd_oprsz(desc) / 8;
+    uint64_t *d = vd, *n = vn, *m = vm, *k = vk;
+
+    for (i = 0; i < opr_sz; ++i) {
+        d[i] = ~((n[i] & k[i]) | (m[i] & ~k[i]));
+    }
+}
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 64aecc2db46..093424fd27d 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -217,6 +217,17 @@ static void gen_gvec_fn_zzz(DisasContext *s, GVecGen3Fn *gvec_fn,
             vec_full_reg_offset(s, rm), vsz, vsz);
 }
 
+/* Invoke a vector expander on four Zregs.  */
+static void gen_gvec_fn_zzzz(DisasContext *s, GVecGen4Fn *gvec_fn,
+                             int esz, int rd, int rn, int rm, int ra)
+{
+    unsigned vsz = vec_full_reg_size(s);
+    gvec_fn(esz, vec_full_reg_offset(s, rd),
+            vec_full_reg_offset(s, rn),
+            vec_full_reg_offset(s, rm),
+            vec_full_reg_offset(s, ra), vsz, vsz);
+}
+
 /* Invoke a vector move on two Zregs.  */
 static bool do_mov_z(DisasContext *s, int rd, int rn)
 {
@@ -329,6 +340,208 @@ static bool trans_BIC_zzz(DisasContext *s, arg_rrr_esz *a)
     return do_zzz_fn(s, a, tcg_gen_gvec_andc);
 }
 
+static bool do_sve2_zzzz_fn(DisasContext *s, arg_rrrr_esz *a, GVecGen4Fn *fn)
+{
+    if (!dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    if (sve_access_check(s)) {
+        gen_gvec_fn_zzzz(s, fn, a->esz, a->rd, a->rn, a->rm, a->ra);
+    }
+    return true;
+}
+
+static void gen_eor3_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m, TCGv_i64 k)
+{
+    tcg_gen_xor_i64(d, n, m);
+    tcg_gen_xor_i64(d, d, k);
+}
+
+static void gen_eor3_vec(unsigned vece, TCGv_vec d, TCGv_vec n,
+                         TCGv_vec m, TCGv_vec k)
+{
+    tcg_gen_xor_vec(vece, d, n, m);
+    tcg_gen_xor_vec(vece, d, d, k);
+}
+
+static void gen_eor3(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
+                     uint32_t a, uint32_t oprsz, uint32_t maxsz)
+{
+    static const GVecGen4 op = {
+        .fni8 = gen_eor3_i64,
+        .fniv = gen_eor3_vec,
+        .fno = gen_helper_sve2_eor3,
+        .vece = MO_64,
+        .prefer_i64 = TCG_TARGET_REG_BITS == 64,
+    };
+    tcg_gen_gvec_4(d, n, m, a, oprsz, maxsz, &op);
+}
+
+static bool trans_EOR3(DisasContext *s, arg_rrrr_esz *a)
+{
+    return do_sve2_zzzz_fn(s, a, gen_eor3);
+}
+
+static void gen_bcax_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m, TCGv_i64 k)
+{
+    tcg_gen_andc_i64(d, m, k);
+    tcg_gen_xor_i64(d, d, n);
+}
+
+static void gen_bcax_vec(unsigned vece, TCGv_vec d, TCGv_vec n,
+                         TCGv_vec m, TCGv_vec k)
+{
+    tcg_gen_andc_vec(vece, d, m, k);
+    tcg_gen_xor_vec(vece, d, d, n);
+}
+
+static void gen_bcax(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
+                     uint32_t a, uint32_t oprsz, uint32_t maxsz)
+{
+    static const GVecGen4 op = {
+        .fni8 = gen_bcax_i64,
+        .fniv = gen_bcax_vec,
+        .fno = gen_helper_sve2_bcax,
+        .vece = MO_64,
+        .prefer_i64 = TCG_TARGET_REG_BITS == 64,
+    };
+    tcg_gen_gvec_4(d, n, m, a, oprsz, maxsz, &op);
+}
+
+static bool trans_BCAX(DisasContext *s, arg_rrrr_esz *a)
+{
+    return do_sve2_zzzz_fn(s, a, gen_bcax);
+}
+
+static void gen_bsl(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
+                    uint32_t a, uint32_t oprsz, uint32_t maxsz)
+{
+    /* BSL differs from the generic bitsel in argument ordering. */
+    tcg_gen_gvec_bitsel(vece, d, a, n, m, oprsz, maxsz);
+}
+
+static bool trans_BSL(DisasContext *s, arg_rrrr_esz *a)
+{
+    return do_sve2_zzzz_fn(s, a, gen_bsl);
+}
+
+static void gen_bsl1n_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m, TCGv_i64 k)
+{
+    tcg_gen_andc_i64(n, k, n);
+    tcg_gen_andc_i64(m, m, k);
+    tcg_gen_or_i64(d, n, m);
+}
+
+static void gen_bsl1n_vec(unsigned vece, TCGv_vec d, TCGv_vec n,
+                          TCGv_vec m, TCGv_vec k)
+{
+    if (TCG_TARGET_HAS_bitsel_vec) {
+        tcg_gen_not_vec(vece, n, n);
+        tcg_gen_bitsel_vec(vece, d, k, n, m);
+    } else {
+        tcg_gen_andc_vec(vece, n, k, n);
+        tcg_gen_andc_vec(vece, m, m, k);
+        tcg_gen_or_vec(vece, d, n, m);
+    }
+}
+
+static void gen_bsl1n(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
+                      uint32_t a, uint32_t oprsz, uint32_t maxsz)
+{
+    static const GVecGen4 op = {
+        .fni8 = gen_bsl1n_i64,
+        .fniv = gen_bsl1n_vec,
+        .fno = gen_helper_sve2_bsl1n,
+        .vece = MO_64,
+        .prefer_i64 = TCG_TARGET_REG_BITS == 64,
+    };
+    tcg_gen_gvec_4(d, n, m, a, oprsz, maxsz, &op);
+}
+
+static bool trans_BSL1N(DisasContext *s, arg_rrrr_esz *a)
+{
+    return do_sve2_zzzz_fn(s, a, gen_bsl1n);
+}
+
+static void gen_bsl2n_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m, TCGv_i64 k)
+{
+    /*
+     * Z[dn] = (n & k) | (~m & ~k)
+     *       =         | ~(m | k)
+     */
+    tcg_gen_and_i64(n, n, k);
+    if (TCG_TARGET_HAS_orc_i64) {
+        tcg_gen_or_i64(m, m, k);
+        tcg_gen_orc_i64(d, n, m);
+    } else {
+        tcg_gen_nor_i64(m, m, k);
+        tcg_gen_or_i64(d, n, m);
+    }
+}
+
+static void gen_bsl2n_vec(unsigned vece, TCGv_vec d, TCGv_vec n,
+                          TCGv_vec m, TCGv_vec k)
+{
+    if (TCG_TARGET_HAS_bitsel_vec) {
+        tcg_gen_not_vec(vece, m, m);
+        tcg_gen_bitsel_vec(vece, d, k, n, m);
+    } else {
+        tcg_gen_and_vec(vece, n, n, k);
+        tcg_gen_or_vec(vece, m, m, k);
+        tcg_gen_orc_vec(vece, d, n, m);
+    }
+}
+
+static void gen_bsl2n(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
+                      uint32_t a, uint32_t oprsz, uint32_t maxsz)
+{
+    static const GVecGen4 op = {
+        .fni8 = gen_bsl2n_i64,
+        .fniv = gen_bsl2n_vec,
+        .fno = gen_helper_sve2_bsl2n,
+        .vece = MO_64,
+        .prefer_i64 = TCG_TARGET_REG_BITS == 64,
+    };
+    tcg_gen_gvec_4(d, n, m, a, oprsz, maxsz, &op);
+}
+
+static bool trans_BSL2N(DisasContext *s, arg_rrrr_esz *a)
+{
+    return do_sve2_zzzz_fn(s, a, gen_bsl2n);
+}
+
+static void gen_nbsl_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m, TCGv_i64 k)
+{
+    tcg_gen_and_i64(n, n, k);
+    tcg_gen_andc_i64(m, m, k);
+    tcg_gen_nor_i64(d, n, m);
+}
+
+static void gen_nbsl_vec(unsigned vece, TCGv_vec d, TCGv_vec n,
+                          TCGv_vec m, TCGv_vec k)
+{
+    tcg_gen_bitsel_vec(vece, d, k, n, m);
+    tcg_gen_not_vec(vece, d, d);
+}
+
+static void gen_nbsl(unsigned vece, uint32_t d, uint32_t n, uint32_t m,
+                     uint32_t a, uint32_t oprsz, uint32_t maxsz)
+{
+    static const GVecGen4 op = {
+        .fni8 = gen_nbsl_i64,
+        .fniv = gen_nbsl_vec,
+        .fno = gen_helper_sve2_nbsl,
+        .vece = MO_64,
+        .prefer_i64 = TCG_TARGET_REG_BITS == 64,
+    };
+    tcg_gen_gvec_4(d, n, m, a, oprsz, maxsz, &op);
+}
+
+static bool trans_NBSL(DisasContext *s, arg_rrrr_esz *a)
+{
+    return do_sve2_zzzz_fn(s, a, gen_nbsl);
+}
+
 /*
  *** SVE Integer Arithmetic - Unpredicated Group
  */
-- 
2.20.1