target/arm: Implement SVE2 UQSHRN, UQRSHRN

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525010358.152808-29-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 137 insertions, 0 deletions

diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h
index 2e80d9d..ba6a24f 100644
--- a/target/arm/helper-sve.h
+++ b/target/arm/helper-sve.h
@@ -2476,6 +2476,22 @@ DEF_HELPER_FLAGS_3(sve2_sqrshrunt_h, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
 DEF_HELPER_FLAGS_3(sve2_sqrshrunt_s, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
 DEF_HELPER_FLAGS_3(sve2_sqrshrunt_d, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_3(sve2_uqshrnb_h, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqshrnb_s, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqshrnb_d, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_3(sve2_uqshrnt_h, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqshrnt_s, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqshrnt_d, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_3(sve2_uqrshrnb_h, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqrshrnb_s, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqrshrnb_d, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_3(sve2_uqrshrnt_h, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqrshrnt_s, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+DEF_HELPER_FLAGS_3(sve2_uqrshrnt_d, TCG_CALL_NO_RWG, void, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_6(sve2_faddp_zpzz_h, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_6(sve2_faddp_zpzz_s, TCG_CALL_NO_RWG,
diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index 18faa90..13b5da0 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1296,6 +1296,10 @@ SHRNB           01000101 .. 1 ..... 00 0100 ..... .....  @rd_rn_tszimm_shr
 SHRNT           01000101 .. 1 ..... 00 0101 ..... .....  @rd_rn_tszimm_shr
 RSHRNB          01000101 .. 1 ..... 00 0110 ..... .....  @rd_rn_tszimm_shr
 RSHRNT          01000101 .. 1 ..... 00 0111 ..... .....  @rd_rn_tszimm_shr
+UQSHRNB         01000101 .. 1 ..... 00 1100 ..... .....  @rd_rn_tszimm_shr
+UQSHRNT         01000101 .. 1 ..... 00 1101 ..... .....  @rd_rn_tszimm_shr
+UQRSHRNB        01000101 .. 1 ..... 00 1110 ..... .....  @rd_rn_tszimm_shr
+UQRSHRNT        01000101 .. 1 ..... 00 1111 ..... .....  @rd_rn_tszimm_shr
 
 ## SVE2 floating-point pairwise operations
 
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index b304ca1..8926214 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -1976,6 +1976,30 @@ DO_SHRNT(sve2_sqrshrunt_h, int16_t, uint8_t, H1_2, H1, DO_SQRSHRUN_H)
 DO_SHRNT(sve2_sqrshrunt_s, int32_t, uint16_t, H1_4, H1_2, DO_SQRSHRUN_S)
 DO_SHRNT(sve2_sqrshrunt_d, int64_t, uint32_t,     , H1_4, DO_SQRSHRUN_D)
 
+#define DO_UQSHRN_H(x, sh) MIN(x >> sh, UINT8_MAX)
+#define DO_UQSHRN_S(x, sh) MIN(x >> sh, UINT16_MAX)
+#define DO_UQSHRN_D(x, sh) MIN(x >> sh, UINT32_MAX)
+
+DO_SHRNB(sve2_uqshrnb_h, uint16_t, uint8_t, DO_UQSHRN_H)
+DO_SHRNB(sve2_uqshrnb_s, uint32_t, uint16_t, DO_UQSHRN_S)
+DO_SHRNB(sve2_uqshrnb_d, uint64_t, uint32_t, DO_UQSHRN_D)
+
+DO_SHRNT(sve2_uqshrnt_h, uint16_t, uint8_t, H1_2, H1, DO_UQSHRN_H)
+DO_SHRNT(sve2_uqshrnt_s, uint32_t, uint16_t, H1_4, H1_2, DO_UQSHRN_S)
+DO_SHRNT(sve2_uqshrnt_d, uint64_t, uint32_t,     , H1_4, DO_UQSHRN_D)
+
+#define DO_UQRSHRN_H(x, sh) MIN(do_urshr(x, sh), UINT8_MAX)
+#define DO_UQRSHRN_S(x, sh) MIN(do_urshr(x, sh), UINT16_MAX)
+#define DO_UQRSHRN_D(x, sh) MIN(do_urshr(x, sh), UINT32_MAX)
+
+DO_SHRNB(sve2_uqrshrnb_h, uint16_t, uint8_t, DO_UQRSHRN_H)
+DO_SHRNB(sve2_uqrshrnb_s, uint32_t, uint16_t, DO_UQRSHRN_S)
+DO_SHRNB(sve2_uqrshrnb_d, uint64_t, uint32_t, DO_UQRSHRN_D)
+
+DO_SHRNT(sve2_uqrshrnt_h, uint16_t, uint8_t, H1_2, H1, DO_UQRSHRN_H)
+DO_SHRNT(sve2_uqrshrnt_s, uint32_t, uint16_t, H1_4, H1_2, DO_UQRSHRN_S)
+DO_SHRNT(sve2_uqrshrnt_d, uint64_t, uint32_t,     , H1_4, DO_UQRSHRN_D)
+
 #undef DO_SHRNB
 #undef DO_SHRNT
 
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 36986b6..e5c7100 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -6956,6 +6956,99 @@ static bool trans_SQRSHRUNT(DisasContext *s, arg_rri_esz *a)
     return do_sve2_shr_narrow(s, a, ops);
 }
 
+static void gen_uqshrnb_vec(unsigned vece, TCGv_vec d,
+                            TCGv_vec n, int64_t shr)
+{
+    TCGv_vec t = tcg_temp_new_vec_matching(d);
+    int halfbits = 4 << vece;
+
+    tcg_gen_shri_vec(vece, n, n, shr);
+    tcg_gen_dupi_vec(vece, t, MAKE_64BIT_MASK(0, halfbits));
+    tcg_gen_umin_vec(vece, d, n, t);
+    tcg_temp_free_vec(t);
+}
+
+static bool trans_UQSHRNB(DisasContext *s, arg_rri_esz *a)
+{
+    static const TCGOpcode vec_list[] = {
+        INDEX_op_shri_vec, INDEX_op_umin_vec, 0
+    };
+    static const GVecGen2i ops[3] = {
+        { .fniv = gen_uqshrnb_vec,
+          .opt_opc = vec_list,
+          .fno = gen_helper_sve2_uqshrnb_h,
+          .vece = MO_16 },
+        { .fniv = gen_uqshrnb_vec,
+          .opt_opc = vec_list,
+          .fno = gen_helper_sve2_uqshrnb_s,
+          .vece = MO_32 },
+        { .fniv = gen_uqshrnb_vec,
+          .opt_opc = vec_list,
+          .fno = gen_helper_sve2_uqshrnb_d,
+          .vece = MO_64 },
+    };
+    return do_sve2_shr_narrow(s, a, ops);
+}
+
+static void gen_uqshrnt_vec(unsigned vece, TCGv_vec d,
+                            TCGv_vec n, int64_t shr)
+{
+    TCGv_vec t = tcg_temp_new_vec_matching(d);
+    int halfbits = 4 << vece;
+
+    tcg_gen_shri_vec(vece, n, n, shr);
+    tcg_gen_dupi_vec(vece, t, MAKE_64BIT_MASK(0, halfbits));
+    tcg_gen_umin_vec(vece, n, n, t);
+    tcg_gen_shli_vec(vece, n, n, halfbits);
+    tcg_gen_bitsel_vec(vece, d, t, d, n);
+    tcg_temp_free_vec(t);
+}
+
+static bool trans_UQSHRNT(DisasContext *s, arg_rri_esz *a)
+{
+    static const TCGOpcode vec_list[] = {
+        INDEX_op_shli_vec, INDEX_op_shri_vec, INDEX_op_umin_vec, 0
+    };
+    static const GVecGen2i ops[3] = {
+        { .fniv = gen_uqshrnt_vec,
+          .opt_opc = vec_list,
+          .load_dest = true,
+          .fno = gen_helper_sve2_uqshrnt_h,
+          .vece = MO_16 },
+        { .fniv = gen_uqshrnt_vec,
+          .opt_opc = vec_list,
+          .load_dest = true,
+          .fno = gen_helper_sve2_uqshrnt_s,
+          .vece = MO_32 },
+        { .fniv = gen_uqshrnt_vec,
+          .opt_opc = vec_list,
+          .load_dest = true,
+          .fno = gen_helper_sve2_uqshrnt_d,
+          .vece = MO_64 },
+    };
+    return do_sve2_shr_narrow(s, a, ops);
+}
+
+static bool trans_UQRSHRNB(DisasContext *s, arg_rri_esz *a)
+{
+    static const GVecGen2i ops[3] = {
+        { .fno = gen_helper_sve2_uqrshrnb_h },
+        { .fno = gen_helper_sve2_uqrshrnb_s },
+        { .fno = gen_helper_sve2_uqrshrnb_d },
+    };
+    return do_sve2_shr_narrow(s, a, ops);
+}
+
+static bool trans_UQRSHRNT(DisasContext *s, arg_rri_esz *a)
+{
+    static const GVecGen2i ops[3] = {
+        { .fno = gen_helper_sve2_uqrshrnt_h },
+        { .fno = gen_helper_sve2_uqrshrnt_s },
+        { .fno = gen_helper_sve2_uqrshrnt_d },
+    };
+    return do_sve2_shr_narrow(s, a, ops);
+}
+
 static bool do_sve2_zpzz_fp(DisasContext *s, arg_rprr_esz *a,
                             gen_helper_gvec_4_ptr *fn)
 {