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target/arm: Convert handle_scalar_simd_shli to decodetree 

This includes SHL and SLI.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240912024114.1097832-25-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-09-11 19:41:09 -07:00 committed by Peter Maydell
parent 9c80de4884
commit 7e5d5a3d8c
2 changed files with 13 additions and 35 deletions
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4
target/arm/tcg/a64.decode
View File

@ -1291,6 +1291,7 @@ RSHRN_v 0.00 11110 .... ... 10001 1 ..... ..... @q_shri_s
@shri_d .... ..... 1 ...... ..... . rn:5 rd:5 \
&rri_e esz=3 imm=%neon_rshift_i6
@shli_d .... ..... 1 imm:6 ..... . rn:5 rd:5 &rri_e esz=3
SSHR_s 0101 11110 .... ... 00000 1 ..... ..... @shri_d
USHR_s 0111 11110 .... ... 00000 1 ..... ..... @shri_d
@ -1301,3 +1302,6 @@ URSHR_s 0111 11110 .... ... 00100 1 ..... ..... @shri_d
SRSRA_s 0101 11110 .... ... 00110 1 ..... ..... @shri_d
URSRA_s 0111 11110 .... ... 00110 1 ..... ..... @shri_d
SRI_s 0111 11110 .... ... 01000 1 ..... ..... @shri_d
SHL_s 0101 11110 .... ... 01010 1 ..... ..... @shli_d
SLI_s 0111 11110 .... ... 01010 1 ..... ..... @shli_d

44
target/arm/tcg/translate-a64.c
View File

@ -7124,6 +7124,11 @@ static void gen_sri_d(TCGv_i64 dst, TCGv_i64 src, int64_t shift)
}
}
static void gen_sli_d(TCGv_i64 dst, TCGv_i64 src, int64_t shift)
{
tcg_gen_deposit_i64(dst, dst, src, shift, 64 - shift);
}
static bool do_vec_shift_imm_narrow(DisasContext *s, arg_qrri_e *a,
WideShiftImmFn * const fns[3], MemOp sign)
{
@ -7201,6 +7206,9 @@ TRANS(SRSRA_s, do_scalar_shift_imm, a, gen_srsra_d, true, 0)
TRANS(URSRA_s, do_scalar_shift_imm, a, gen_ursra_d, true, 0)
TRANS(SRI_s, do_scalar_shift_imm, a, gen_sri_d, true, 0)
TRANS(SHL_s, do_scalar_shift_imm, a, tcg_gen_shli_i64, false, 0)
TRANS(SLI_s, do_scalar_shift_imm, a, gen_sli_d, true, 0)
/* Shift a TCGv src by TCGv shift_amount, put result in dst.
* Note that it is the caller's responsibility to ensure that the
* shift amount is in range (ie 0..31 or 0..63) and provide the ARM
@ -9417,38 +9425,6 @@ static void handle_shri_with_rndacc(TCGv_i64 tcg_res, TCGv_i64 tcg_src,
}
}
/* SHL/SLI - Scalar shift left */
static void handle_scalar_simd_shli(DisasContext *s, bool insert,
int immh, int immb, int opcode,
int rn, int rd)
{
int size = 32 - clz32(immh) - 1;
int immhb = immh << 3 | immb;
int shift = immhb - (8 << size);
TCGv_i64 tcg_rn;
TCGv_i64 tcg_rd;
if (!extract32(immh, 3, 1)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_rn = read_fp_dreg(s, rn);
tcg_rd = insert ? read_fp_dreg(s, rd) : tcg_temp_new_i64();
if (insert) {
tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_rn, shift, 64 - shift);
} else {
tcg_gen_shli_i64(tcg_rd, tcg_rn, shift);
}
write_fp_dreg(s, rd, tcg_rd);
}
/* SQSHRN/SQSHRUN - Saturating (signed/unsigned) shift right with
* (signed/unsigned) narrowing */
static void handle_vec_simd_sqshrn(DisasContext *s, bool is_scalar, bool is_q,
@ -9900,9 +9876,6 @@ static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
}
switch (opcode) {
case 0x0a: /* SHL / SLI */
handle_scalar_simd_shli(s, is_u, immh, immb, opcode, rn, rd);
break;
case 0x1c: /* SCVTF, UCVTF */
handle_simd_shift_intfp_conv(s, true, false, is_u, immh, immb,
opcode, rn, rd);
@ -9940,6 +9913,7 @@ static void disas_simd_scalar_shift_imm(DisasContext *s, uint32_t insn)
case 0x04: /* SRSHR / URSHR */
case 0x06: /* SRSRA / URSRA */
case 0x08: /* SRI */
case 0x0a: /* SHL / SLI */
unallocated_encoding(s);
break;
}