target/arm: Introduce gen_gvec_cls, gen_gvec_clz

Add gvec interfaces for CLS and CLZ operations.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241211163036.2297116-38-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/tcg/gengvec.c b/target/arm/tcg/gengvec.c
index f652520b652d85343c29f667a7ba05de2d784b80..834b2961c06c792bafb78c6cdba264b720203c7b 100644 (file)
--- a/target/arm/tcg/gengvec.c
+++ b/target/arm/tcg/gengvec.c
@@ -2358,3 +2358,38 @@ void gen_gvec_urhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
     assert(vece <= MO_32);
     tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &g[vece]);
 }
+
+void gen_gvec_cls(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                  uint32_t opr_sz, uint32_t max_sz)
+{
+    static const GVecGen2 g[] = {
+        { .fni4 = gen_helper_neon_cls_s8,
+          .vece = MO_8 },
+        { .fni4 = gen_helper_neon_cls_s16,
+          .vece = MO_16 },
+        { .fni4 = tcg_gen_clrsb_i32,
+          .vece = MO_32 },
+    };
+    assert(vece <= MO_32);
+    tcg_gen_gvec_2(rd_ofs, rn_ofs, opr_sz, max_sz, &g[vece]);
+}
+
+static void gen_clz32_i32(TCGv_i32 d, TCGv_i32 n)
+{
+    tcg_gen_clzi_i32(d, n, 32);
+}
+
+void gen_gvec_clz(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                  uint32_t opr_sz, uint32_t max_sz)
+{
+    static const GVecGen2 g[] = {
+        { .fni4 = gen_helper_neon_clz_u8,
+          .vece = MO_8 },
+        { .fni4 = gen_helper_neon_clz_u16,
+          .vece = MO_16 },
+        { .fni4 = gen_clz32_i32,
+          .vece = MO_32 },
+    };
+    assert(vece <= MO_32);
+    tcg_gen_gvec_2(rd_ofs, rn_ofs, opr_sz, max_sz, &g[vece]);
+}

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index c697f0e94416cbc9154fa65b4439feaf7bb61019..387bbbf906bac5a8a5f275020826d7763ebe97f3 100644 (file)
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -10321,6 +10321,13 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
     }
 
     switch (opcode) {
+    case 0x4: /* CLZ, CLS */
+        if (u) {
+            gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_clz, size);
+        } else {
+            gen_gvec_fn2(s, is_q, rd, rn, gen_gvec_cls, size);
+        }
+        return;
     case 0x5:
         if (u && size == 0) { /* NOT */
             gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_not, 0);
@@ -10379,13 +10386,6 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
             if (size == 2) {
                 /* Special cases for 32 bit elements */
                 switch (opcode) {
-                case 0x4: /* CLS */
-                    if (u) {
-                        tcg_gen_clzi_i32(tcg_res, tcg_op, 32);
-                    } else {
-                        tcg_gen_clrsb_i32(tcg_res, tcg_op);
-                    }
-                    break;
                 case 0x2f: /* FABS */
                     gen_vfp_abss(tcg_res, tcg_op);
                     break;
@@ -10450,21 +10450,6 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
                         gen_helper_neon_cnt_u8(tcg_res, tcg_op);
                     }
                     break;
-                case 0x4: /* CLS, CLZ */
-                    if (u) {
-                        if (size == 0) {
-                            gen_helper_neon_clz_u8(tcg_res, tcg_op);
-                        } else {
-                            gen_helper_neon_clz_u16(tcg_res, tcg_op);
-                        }
-                    } else {
-                        if (size == 0) {
-                            gen_helper_neon_cls_s8(tcg_res, tcg_op);
-                        } else {
-                            gen_helper_neon_cls_s16(tcg_res, tcg_op);
-                        }
-                    }
-                    break;
                 default:
                 case 0x7: /* SQABS, SQNEG */
                     g_assert_not_reached();

diff --git a/target/arm/tcg/translate-neon.c b/target/arm/tcg/translate-neon.c
index 9c8829ad7d24ec6ab2bbcaf07980dc1f9c1d1017..1c89a53272213f748e62a8c210e594074e027a16 100644 (file)
--- a/target/arm/tcg/translate-neon.c
+++ b/target/arm/tcg/translate-neon.c
@@ -3120,6 +3120,8 @@ DO_2MISC_VEC(VCGT0, gen_gvec_cgt0)
 DO_2MISC_VEC(VCLE0, gen_gvec_cle0)
 DO_2MISC_VEC(VCGE0, gen_gvec_cge0)
 DO_2MISC_VEC(VCLT0, gen_gvec_clt0)
+DO_2MISC_VEC(VCLS, gen_gvec_cls)
+DO_2MISC_VEC(VCLZ, gen_gvec_clz)
 
 static bool trans_VMVN(DisasContext *s, arg_2misc *a)
 {
@@ -3227,33 +3229,6 @@ static bool trans_VREV16(DisasContext *s, arg_2misc *a)
     return do_2misc(s, a, gen_rev16);
 }
 
-static bool trans_VCLS(DisasContext *s, arg_2misc *a)
-{
-    static NeonGenOneOpFn * const fn[] = {
-        gen_helper_neon_cls_s8,
-        gen_helper_neon_cls_s16,
-        gen_helper_neon_cls_s32,
-        NULL,
-    };
-    return do_2misc(s, a, fn[a->size]);
-}
-
-static void do_VCLZ_32(TCGv_i32 rd, TCGv_i32 rm)
-{
-    tcg_gen_clzi_i32(rd, rm, 32);
-}
-
-static bool trans_VCLZ(DisasContext *s, arg_2misc *a)
-{
-    static NeonGenOneOpFn * const fn[] = {
-        gen_helper_neon_clz_u8,
-        gen_helper_neon_clz_u16,
-        do_VCLZ_32,
-        NULL,
-    };
-    return do_2misc(s, a, fn[a->size]);
-}
-
 static bool trans_VCNT(DisasContext *s, arg_2misc *a)
 {
     if (a->size != 0) {

diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index 20cd0e851c4349c84e085f7abc6035e4726ec0df..5c6c24f0575ffe951dd4a793cf0d5127f9107929 100644 (file)
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -578,6 +578,11 @@ void gen_gvec_umaxp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
 void gen_gvec_uminp(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                     uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 
+void gen_gvec_cls(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                  uint32_t opr_sz, uint32_t max_sz);
+void gen_gvec_clz(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                  uint32_t opr_sz, uint32_t max_sz);
+
 /*
  * Forward to the isar_feature_* tests given a DisasContext pointer.
  */