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target/arm: Convert [US]CVTF (vector, fixed-point) scalar to decodetree

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Remove disas_simd_scalar_shift_imm 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: 20241211163036.2297116-61-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-11 10:30:27 -06:00 • committed by Peter Maydell
parent f469ca170d
commit 69d5391a66
2 changed files with 8 additions and 47 deletions
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8
target/arm/tcg/a64.decode
View file

@ -1699,6 +1699,14 @@ FCVTAU_f 0111 1110 0.1 00001 11001 0 ..... ..... @icvt_sd
@fcvt_fixed_d .... .... . 1 ...... ...... rn:5 rd:5 \
&fcvt sf=0 esz=3 shift=%fcvt_f_sh_d
SCVTF_f 0101 1111 0 ....... 111001 ..... ..... @fcvt_fixed_h
SCVTF_f 0101 1111 0 ....... 111001 ..... ..... @fcvt_fixed_s
SCVTF_f 0101 1111 0 ....... 111001 ..... ..... @fcvt_fixed_d
UCVTF_f 0111 1111 0 ....... 111001 ..... ..... @fcvt_fixed_h
UCVTF_f 0111 1111 0 ....... 111001 ..... ..... @fcvt_fixed_s
UCVTF_f 0111 1111 0 ....... 111001 ..... ..... @fcvt_fixed_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

47
target/arm/tcg/translate-a64.c
View file

@ -9531,52 +9531,6 @@ static void handle_simd_shift_fpint_conv(DisasContext *s, bool is_scalar,
gen_restore_rmode(tcg_rmode, tcg_fpstatus);
}
/* AdvSIMD scalar shift by immediate
* 31 30 29 28 23 22 19 18 16 15 11 10 9 5 4 0
* +-----+---+-------------+------+------+--------+---+------+------+
* | 0 1 | U | 1 1 1 1 1 0 | immh | immb | opcode | 1 | Rn | Rd |
* +-----+---+-------------+------+------+--------+---+------+------+
*
* This is the scalar version so it works on a fixed sized registers
*/
static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
{
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 5);
int immb = extract32(insn, 16, 3);
int immh = extract32(insn, 19, 4);
bool is_u = extract32(insn, 29, 1);
if (immh == 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0x1c: /* SCVTF, UCVTF */
handle_simd_shift_intfp_conv(s, true, false, is_u, immh, immb,
opcode, rn, rd);
break;
default:
case 0x00: /* SSHR / USHR */
case 0x02: /* SSRA / USRA */
case 0x04: /* SRSHR / URSHR */
case 0x06: /* SRSRA / URSRA */
case 0x08: /* SRI */
case 0x0a: /* SHL / SLI */
case 0x0c: /* SQSHLU */
case 0x0e: /* SQSHL, UQSHL */
case 0x10: /* SQSHRUN */
case 0x11: /* SQRSHRUN */
case 0x12: /* SQSHRN, UQSHRN */
case 0x13: /* SQRSHRN, UQRSHRN */
case 0x1f: /* FCVTZS, FCVTZU */
unallocated_encoding(s);
break;
}
}
static void handle_2misc_64(DisasContext *s, int opcode, bool u,
TCGv_i64 tcg_rd, TCGv_i64 tcg_rn,
TCGv_i32 tcg_rmode, TCGv_ptr tcg_fpstatus)
@ -10476,7 +10430,6 @@ static const AArch64DecodeTable data_proc_simd[] = {
{ 0x0e200800, 0x9f3e0c00, disas_simd_two_reg_misc },
{ 0x0f000400, 0x9f800400, disas_simd_shift_imm },
{ 0x5e200800, 0xdf3e0c00, disas_simd_scalar_two_reg_misc },
{ 0x5f000400, 0xdf800400, disas_simd_scalar_shift_imm },
{ 0x0e780800, 0x8f7e0c00, disas_simd_two_reg_misc_fp16 },
{ 0x00000000, 0x00000000, NULL }
};