target/arm: Convert URECPE and URSQRTE to decodetree

Remove handle_2misc_reciprocal as these were the last
insns decoded by that function.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241211163036.2297116-69-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 8 insertions, 134 deletions

diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index 9b3b09c..f35d123 100644
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -1863,6 +1863,9 @@ FRECPE_v        0.00 1110 1.1 00001 11011 0 ..... .....     @qrr_sd
 FRSQRTE_v       0.10 1110 111 11001 11011 0 ..... .....     @qrr_h
 FRSQRTE_v       0.10 1110 1.1 00001 11011 0 ..... .....     @qrr_sd
 
+URECPE_v        0.00 1110 101 00001 11001 0 ..... .....     @qrr_s
+URSQRTE_v       0.10 1110 101 00001 11001 0 ..... .....     @qrr_s
+
 &fcvt_q         rd rn esz q shift
 @fcvtq_h        . q:1 . ...... 001 .... ...... rn:5 rd:5    \
                 &fcvt_q esz=1 shift=%fcvt_f_sh_h
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 63cf252..fa3170d 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -9163,6 +9163,8 @@ TRANS(CMLE0_v, do_gvec_fn2, a, gen_gvec_cle0)
 TRANS(CMEQ0_v, do_gvec_fn2, a, gen_gvec_ceq0)
 TRANS(REV16_v, do_gvec_fn2, a, gen_gvec_rev16)
 TRANS(REV32_v, do_gvec_fn2, a, gen_gvec_rev32)
+TRANS(URECPE_v, do_gvec_fn2, a, gen_gvec_urecpe)
+TRANS(URSQRTE_v, do_gvec_fn2, a, gen_gvec_ursqrte)
 
 static bool do_gvec_fn2_bhs(DisasContext *s, arg_qrr_e *a, GVecGen2Fn *fn)
 {
@@ -9506,51 +9508,6 @@ static gen_helper_gvec_2_ptr * const f_frsqrte[] = {
 };
 TRANS(FRSQRTE_v, do_gvec_op2_fpst, a->esz, a->q, a->rd, a->rn, 0, f_frsqrte)
 
-static void handle_2misc_reciprocal(DisasContext *s, int opcode,
-                                    bool is_scalar, bool is_u, bool is_q,
-                                    int size, int rn, int rd)
-{
-    bool is_double = (size == 3);
-
-    if (is_double) {
-        g_assert_not_reached();
-    } else {
-        TCGv_i32 tcg_op = tcg_temp_new_i32();
-        TCGv_i32 tcg_res = tcg_temp_new_i32();
-        int pass, maxpasses;
-
-        if (is_scalar) {
-            maxpasses = 1;
-        } else {
-            maxpasses = is_q ? 4 : 2;
-        }
-
-        for (pass = 0; pass < maxpasses; pass++) {
-            read_vec_element_i32(s, tcg_op, rn, pass, MO_32);
-
-            switch (opcode) {
-            case 0x3c: /* URECPE */
-                gen_helper_recpe_u32(tcg_res, tcg_op);
-                break;
-            case 0x3d: /* FRECPE */
-            case 0x3f: /* FRECPX */
-            case 0x7d: /* FRSQRTE */
-            default:
-                g_assert_not_reached();
-            }
-
-            if (is_scalar) {
-                write_fp_sreg(s, rd, tcg_res);
-            } else {
-                write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
-            }
-        }
-        if (!is_scalar) {
-            clear_vec_high(s, is_q, rd);
-        }
-    }
-}
-
 static void handle_2misc_widening(DisasContext *s, int opcode, bool is_q,
                                   int size, int rn, int rd)
 {
@@ -9609,10 +9566,6 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
     bool is_q = extract32(insn, 30, 1);
     int rn = extract32(insn, 5, 5);
     int rd = extract32(insn, 0, 5);
-    bool need_fpstatus = false;
-    int rmode = -1;
-    TCGv_i32 tcg_rmode;
-    TCGv_ptr tcg_fpstatus;
 
     switch (opcode) {
     case 0xc ... 0xf:
@@ -9625,28 +9578,12 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
         opcode |= (extract32(size, 1, 1) << 5) | (u << 6);
         size = is_double ? 3 : 2;
         switch (opcode) {
-        case 0x3c: /* URECPE */
-            if (size == 3) {
-                unallocated_encoding(s);
-                return;
-            }
-            if (!fp_access_check(s)) {
-                return;
-            }
-            handle_2misc_reciprocal(s, opcode, false, u, is_q, size, rn, rd);
-            return;
         case 0x17: /* FCVTL, FCVTL2 */
             if (!fp_access_check(s)) {
                 return;
             }
             handle_2misc_widening(s, opcode, is_q, size, rn, rd);
             return;
-        case 0x7c: /* URSQRTE */
-            if (size == 3) {
-                unallocated_encoding(s);
-                return;
-            }
-            break;
         default:
         case 0x16: /* FCVTN, FCVTN2 */
         case 0x36: /* BFCVTN, BFCVTN2 */
@@ -9684,6 +9621,8 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
         case 0x6d: /* FCMLE (zero) */
         case 0x3d: /* FRECPE */
         case 0x7d: /* FRSQRTE */
+        case 0x3c: /* URECPE */
+        case 0x7c: /* URSQRTE */
             unallocated_encoding(s);
             return;
         }
@@ -9708,75 +9647,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
         unallocated_encoding(s);
         return;
     }
-
-    if (!fp_access_check(s)) {
-        return;
-    }
-
-    if (need_fpstatus || rmode >= 0) {
-        tcg_fpstatus = fpstatus_ptr(FPST_FPCR);
-    } else {
-        tcg_fpstatus = NULL;
-    }
-    if (rmode >= 0) {
-        tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus);
-    } else {
-        tcg_rmode = NULL;
-    }
-
-    {
-        int pass;
-
-        assert(size == 2);
-        for (pass = 0; pass < (is_q ? 4 : 2); pass++) {
-            TCGv_i32 tcg_op = tcg_temp_new_i32();
-            TCGv_i32 tcg_res = tcg_temp_new_i32();
-
-            read_vec_element_i32(s, tcg_op, rn, pass, MO_32);
-
-            {
-                /* Special cases for 32 bit elements */
-                switch (opcode) {
-                case 0x7c: /* URSQRTE */
-                    gen_helper_rsqrte_u32(tcg_res, tcg_op);
-                    break;
-                default:
-                case 0x7: /* SQABS, SQNEG */
-                case 0x2f: /* FABS */
-                case 0x6f: /* FNEG */
-                case 0x7f: /* FSQRT */
-                case 0x18: /* FRINTN */
-                case 0x19: /* FRINTM */
-                case 0x38: /* FRINTP */
-                case 0x39: /* FRINTZ */
-                case 0x58: /* FRINTA */
-                case 0x79: /* FRINTI */
-                case 0x59: /* FRINTX */
-                case 0x1e: /* FRINT32Z */
-                case 0x5e: /* FRINT32X */
-                case 0x1f: /* FRINT64Z */
-                case 0x5f: /* FRINT64X */
-                case 0x1a: /* FCVTNS */
-                case 0x1b: /* FCVTMS */
-                case 0x1c: /* FCVTAS */
-                case 0x3a: /* FCVTPS */
-                case 0x3b: /* FCVTZS */
-                case 0x5a: /* FCVTNU */
-                case 0x5b: /* FCVTMU */
-                case 0x5c: /* FCVTAU */
-                case 0x7a: /* FCVTPU */
-                case 0x7b: /* FCVTZU */
-                    g_assert_not_reached();
-                }
-            }
-            write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
-        }
-    }
-    clear_vec_high(s, is_q, rd);
-
-    if (tcg_rmode) {
-        gen_restore_rmode(tcg_rmode, tcg_fpstatus);
-    }
+    g_assert_not_reached();
 }
 
 /* C3.6 Data processing - SIMD, inc Crypto