target/arm: Convert FCVT* (vector, fixed-point) scalar to decodetree

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241211163036.2297116-59-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index f7fcc32adc5e8e8e0db010c82128d66ba7e2b85e..f66f62da4f09f0ff4f21492df1bc5d110f037ed3 100644 (file)
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -1682,6 +1682,25 @@ FCVTAS_f        0101 1110 0.1 00001 11001 0 ..... .....     @icvt_sd
 FCVTAU_f        0111 1110 011 11001 11001 0 ..... .....     @icvt_h
 FCVTAU_f        0111 1110 0.1 00001 11001 0 ..... .....     @icvt_sd
 
+%fcvt_f_sh_h    16:4 !function=rsub_16
+%fcvt_f_sh_s    16:5 !function=rsub_32
+%fcvt_f_sh_d    16:6 !function=rsub_64
+
+@fcvt_fixed_h   .... .... . 001 .... ...... rn:5 rd:5       \
+                &fcvt sf=0 esz=1 shift=%fcvt_f_sh_h
+@fcvt_fixed_s   .... .... . 01 ..... ...... rn:5 rd:5       \
+                &fcvt sf=0 esz=2 shift=%fcvt_f_sh_s
+@fcvt_fixed_d   .... .... . 1 ...... ...... rn:5 rd:5       \
+                &fcvt sf=0 esz=3 shift=%fcvt_f_sh_d
+
+FCVTZS_f        0101 1111 0 ....... 111111 ..... .....      @fcvt_fixed_h
+FCVTZS_f        0101 1111 0 ....... 111111 ..... .....      @fcvt_fixed_s
+FCVTZS_f        0101 1111 0 ....... 111111 ..... .....      @fcvt_fixed_d
+
+FCVTZU_f        0111 1111 0 ....... 111111 ..... .....      @fcvt_fixed_h
+FCVTZU_f        0111 1111 0 ....... 111111 ..... .....      @fcvt_fixed_s
+FCVTZU_f        0111 1111 0 ....... 111111 ..... .....      @fcvt_fixed_d
+
 # Advanced SIMD two-register miscellaneous
 
 SQABS_v         0.00 1110 ..1 00000 01111 0 ..... .....     @qrr_e

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 71f1d6f77864be04da29628e96beb7c3a6eee926..894befef4dcbcbf9ec1243777ecc7506bffc76f4 100644 (file)
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -9535,9 +9535,6 @@ static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
         handle_simd_shift_intfp_conv(s, true, false, is_u, immh, immb,
                                      opcode, rn, rd);
         break;
-    case 0x1f: /* FCVTZS, FCVTZU */
-        handle_simd_shift_fpint_conv(s, true, false, is_u, immh, immb, rn, rd);
-        break;
     default:
     case 0x00: /* SSHR / USHR */
     case 0x02: /* SSRA / USRA */
@@ -9551,6 +9548,7 @@ static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
     case 0x11: /* SQRSHRUN */
     case 0x12: /* SQSHRN, UQSHRN */
     case 0x13: /* SQRSHRN, UQRSHRN */
+    case 0x1f: /* FCVTZS, FCVTZU */
         unallocated_encoding(s);
         break;
     }