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([187.217.227.247]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-46755db613csm43849381cf.70.2024.12.11.08.32.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Dec 2024 08:32:21 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Peter Maydell Subject: [PATCH v3 32/69] target/arm: Convert handle_fpfpcvt to decodetree Date: Wed, 11 Dec 2024 10:29:59 -0600 Message-ID: <20241211163036.2297116-33-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241211163036.2297116-1-richard.henderson@linaro.org> References: <20241211163036.2297116-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::834; envelope-from=richard.henderson@linaro.org; helo=mail-qt1-x834.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This includes SCVTF, UCVTF, FCVT{N,P,M,Z,A}{S,U}. Remove disas_fp_fixed_conv as those were the last insns decoded by that function. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/tcg/translate-a64.c | 391 ++++++++++++++------------------- target/arm/tcg/a64.decode | 40 ++++ 2 files changed, 209 insertions(+), 222 deletions(-) diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index b31a6d4dff..67227e2676 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -8524,227 +8524,196 @@ static bool trans_FCVT_s_dh(DisasContext *s, arg_rr *a) return true; } -/* Handle floating point <=> fixed point conversions. Note that we can - * also deal with fp <=> integer conversions as a special case (scale == 64) - * OPTME: consider handling that special case specially or at least skipping - * the call to scalbn in the helpers for zero shifts. - */ -static void handle_fpfpcvt(DisasContext *s, int rd, int rn, int opcode, - bool itof, int rmode, int scale, int sf, int type) +static bool do_cvtf_scalar(DisasContext *s, MemOp esz, int rd, int shift, + TCGv_i64 tcg_int, bool is_signed) { - bool is_signed = !(opcode & 1); TCGv_ptr tcg_fpstatus; TCGv_i32 tcg_shift, tcg_single; TCGv_i64 tcg_double; - tcg_fpstatus = fpstatus_ptr(type == 3 ? FPST_FPCR_F16 : FPST_FPCR); + tcg_fpstatus = fpstatus_ptr(esz == MO_16 ? FPST_FPCR_F16 : FPST_FPCR); + tcg_shift = tcg_constant_i32(shift); - tcg_shift = tcg_constant_i32(64 - scale); - - if (itof) { - TCGv_i64 tcg_int = cpu_reg(s, rn); - if (!sf) { - TCGv_i64 tcg_extend = tcg_temp_new_i64(); - - if (is_signed) { - tcg_gen_ext32s_i64(tcg_extend, tcg_int); - } else { - tcg_gen_ext32u_i64(tcg_extend, tcg_int); - } - - tcg_int = tcg_extend; + switch (esz) { + case MO_64: + tcg_double = tcg_temp_new_i64(); + if (is_signed) { + gen_helper_vfp_sqtod(tcg_double, tcg_int, tcg_shift, tcg_fpstatus); + } else { + gen_helper_vfp_uqtod(tcg_double, tcg_int, tcg_shift, tcg_fpstatus); } + write_fp_dreg(s, rd, tcg_double); + break; - switch (type) { - case 1: /* float64 */ - tcg_double = tcg_temp_new_i64(); - if (is_signed) { - gen_helper_vfp_sqtod(tcg_double, tcg_int, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_uqtod(tcg_double, tcg_int, - tcg_shift, tcg_fpstatus); - } - write_fp_dreg(s, rd, tcg_double); - break; - - case 0: /* float32 */ - tcg_single = tcg_temp_new_i32(); - if (is_signed) { - gen_helper_vfp_sqtos(tcg_single, tcg_int, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_uqtos(tcg_single, tcg_int, - tcg_shift, tcg_fpstatus); - } - write_fp_sreg(s, rd, tcg_single); - break; - - case 3: /* float16 */ - tcg_single = tcg_temp_new_i32(); - if (is_signed) { - gen_helper_vfp_sqtoh(tcg_single, tcg_int, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_uqtoh(tcg_single, tcg_int, - tcg_shift, tcg_fpstatus); - } - write_fp_sreg(s, rd, tcg_single); - break; - - default: - g_assert_not_reached(); + case MO_32: + tcg_single = tcg_temp_new_i32(); + if (is_signed) { + gen_helper_vfp_sqtos(tcg_single, tcg_int, tcg_shift, tcg_fpstatus); + } else { + gen_helper_vfp_uqtos(tcg_single, tcg_int, tcg_shift, tcg_fpstatus); } - } else { - TCGv_i64 tcg_int = cpu_reg(s, rd); - TCGv_i32 tcg_rmode; + write_fp_sreg(s, rd, tcg_single); + break; - if (extract32(opcode, 2, 1)) { - /* There are too many rounding modes to all fit into rmode, - * so FCVTA[US] is a special case. - */ - rmode = FPROUNDING_TIEAWAY; + case MO_16: + tcg_single = tcg_temp_new_i32(); + if (is_signed) { + gen_helper_vfp_sqtoh(tcg_single, tcg_int, tcg_shift, tcg_fpstatus); + } else { + gen_helper_vfp_uqtoh(tcg_single, tcg_int, tcg_shift, tcg_fpstatus); } + write_fp_sreg(s, rd, tcg_single); + break; - tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus); - - switch (type) { - case 1: /* float64 */ - tcg_double = read_fp_dreg(s, rn); - if (is_signed) { - if (!sf) { - gen_helper_vfp_tosld(tcg_int, tcg_double, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_tosqd(tcg_int, tcg_double, - tcg_shift, tcg_fpstatus); - } - } else { - if (!sf) { - gen_helper_vfp_tould(tcg_int, tcg_double, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_touqd(tcg_int, tcg_double, - tcg_shift, tcg_fpstatus); - } - } - if (!sf) { - tcg_gen_ext32u_i64(tcg_int, tcg_int); - } - break; - - case 0: /* float32 */ - tcg_single = read_fp_sreg(s, rn); - if (sf) { - if (is_signed) { - gen_helper_vfp_tosqs(tcg_int, tcg_single, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_touqs(tcg_int, tcg_single, - tcg_shift, tcg_fpstatus); - } - } else { - TCGv_i32 tcg_dest = tcg_temp_new_i32(); - if (is_signed) { - gen_helper_vfp_tosls(tcg_dest, tcg_single, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_touls(tcg_dest, tcg_single, - tcg_shift, tcg_fpstatus); - } - tcg_gen_extu_i32_i64(tcg_int, tcg_dest); - } - break; - - case 3: /* float16 */ - tcg_single = read_fp_sreg(s, rn); - if (sf) { - if (is_signed) { - gen_helper_vfp_tosqh(tcg_int, tcg_single, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_touqh(tcg_int, tcg_single, - tcg_shift, tcg_fpstatus); - } - } else { - TCGv_i32 tcg_dest = tcg_temp_new_i32(); - if (is_signed) { - gen_helper_vfp_toslh(tcg_dest, tcg_single, - tcg_shift, tcg_fpstatus); - } else { - gen_helper_vfp_toulh(tcg_dest, tcg_single, - tcg_shift, tcg_fpstatus); - } - tcg_gen_extu_i32_i64(tcg_int, tcg_dest); - } - break; - - default: - g_assert_not_reached(); - } - - gen_restore_rmode(tcg_rmode, tcg_fpstatus); + default: + g_assert_not_reached(); } + return true; } -/* Floating point <-> fixed point conversions - * 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0 - * +----+---+---+-----------+------+---+-------+--------+-------+------+------+ - * | sf | 0 | S | 1 1 1 1 0 | type | 0 | rmode | opcode | scale | Rn | Rd | - * +----+---+---+-----------+------+---+-------+--------+-------+------+------+ - */ -static void disas_fp_fixed_conv(DisasContext *s, uint32_t insn) +static bool do_cvtf_g(DisasContext *s, arg_fcvt *a, bool is_signed) { - int rd = extract32(insn, 0, 5); - int rn = extract32(insn, 5, 5); - int scale = extract32(insn, 10, 6); - int opcode = extract32(insn, 16, 3); - int rmode = extract32(insn, 19, 2); - int type = extract32(insn, 22, 2); - bool sbit = extract32(insn, 29, 1); - bool sf = extract32(insn, 31, 1); - bool itof; + TCGv_i64 tcg_int; + int check = fp_access_check_scalar_hsd(s, a->esz); - if (sbit || (!sf && scale < 32)) { - unallocated_encoding(s); - return; + if (check <= 0) { + return check == 0; } - switch (type) { - case 0: /* float32 */ - case 1: /* float64 */ - break; - case 3: /* float16 */ - if (dc_isar_feature(aa64_fp16, s)) { - break; + if (a->sf) { + tcg_int = cpu_reg(s, a->rn); + } else { + tcg_int = read_cpu_reg(s, a->rn, true); + if (is_signed) { + tcg_gen_ext32s_i64(tcg_int, tcg_int); + } else { + tcg_gen_ext32u_i64(tcg_int, tcg_int); } - /* fallthru */ - default: - unallocated_encoding(s); - return; } - - switch ((rmode << 3) | opcode) { - case 0x2: /* SCVTF */ - case 0x3: /* UCVTF */ - itof = true; - break; - case 0x18: /* FCVTZS */ - case 0x19: /* FCVTZU */ - itof = false; - break; - default: - unallocated_encoding(s); - return; - } - - if (!fp_access_check(s)) { - return; - } - - handle_fpfpcvt(s, rd, rn, opcode, itof, FPROUNDING_ZERO, scale, sf, type); + return do_cvtf_scalar(s, a->esz, a->rd, a->shift, tcg_int, is_signed); } +TRANS(SCVTF_g, do_cvtf_g, a, true) +TRANS(UCVTF_g, do_cvtf_g, a, false) + +static void do_fcvt_scalar(DisasContext *s, MemOp out, MemOp esz, + TCGv_i64 tcg_out, int shift, int rn, + ARMFPRounding rmode) +{ + TCGv_ptr tcg_fpstatus; + TCGv_i32 tcg_shift, tcg_rmode, tcg_single; + + tcg_fpstatus = fpstatus_ptr(esz == MO_16 ? FPST_FPCR_F16 : FPST_FPCR); + tcg_shift = tcg_constant_i32(shift); + tcg_rmode = gen_set_rmode(rmode, tcg_fpstatus); + + switch (esz) { + case MO_64: + read_vec_element(s, tcg_out, rn, 0, MO_64); + switch (out) { + case MO_64 | MO_SIGN: + gen_helper_vfp_tosqd(tcg_out, tcg_out, tcg_shift, tcg_fpstatus); + break; + case MO_64: + gen_helper_vfp_touqd(tcg_out, tcg_out, tcg_shift, tcg_fpstatus); + break; + case MO_32 | MO_SIGN: + gen_helper_vfp_tosld(tcg_out, tcg_out, tcg_shift, tcg_fpstatus); + break; + case MO_32: + gen_helper_vfp_tould(tcg_out, tcg_out, tcg_shift, tcg_fpstatus); + break; + default: + g_assert_not_reached(); + } + break; + + case MO_32: + tcg_single = read_fp_sreg(s, rn); + switch (out) { + case MO_64 | MO_SIGN: + gen_helper_vfp_tosqs(tcg_out, tcg_single, tcg_shift, tcg_fpstatus); + break; + case MO_64: + gen_helper_vfp_touqs(tcg_out, tcg_single, tcg_shift, tcg_fpstatus); + break; + case MO_32 | MO_SIGN: + gen_helper_vfp_tosls(tcg_single, tcg_single, + tcg_shift, tcg_fpstatus); + tcg_gen_extu_i32_i64(tcg_out, tcg_single); + break; + case MO_32: + gen_helper_vfp_touls(tcg_single, tcg_single, + tcg_shift, tcg_fpstatus); + tcg_gen_extu_i32_i64(tcg_out, tcg_single); + break; + default: + g_assert_not_reached(); + } + break; + + case MO_16: + tcg_single = read_fp_hreg(s, rn); + switch (out) { + case MO_64 | MO_SIGN: + gen_helper_vfp_tosqh(tcg_out, tcg_single, tcg_shift, tcg_fpstatus); + break; + case MO_64: + gen_helper_vfp_touqh(tcg_out, tcg_single, tcg_shift, tcg_fpstatus); + break; + case MO_32 | MO_SIGN: + gen_helper_vfp_toslh(tcg_single, tcg_single, + tcg_shift, tcg_fpstatus); + tcg_gen_extu_i32_i64(tcg_out, tcg_single); + break; + case MO_32: + gen_helper_vfp_toulh(tcg_single, tcg_single, + tcg_shift, tcg_fpstatus); + tcg_gen_extu_i32_i64(tcg_out, tcg_single); + break; + default: + g_assert_not_reached(); + } + break; + + default: + g_assert_not_reached(); + } + + gen_restore_rmode(tcg_rmode, tcg_fpstatus); +} + +static bool do_fcvt_g(DisasContext *s, arg_fcvt *a, + ARMFPRounding rmode, bool is_signed) +{ + TCGv_i64 tcg_int; + int check = fp_access_check_scalar_hsd(s, a->esz); + + if (check <= 0) { + return check == 0; + } + + tcg_int = cpu_reg(s, a->rd); + do_fcvt_scalar(s, (a->sf ? MO_64 : MO_32) | (is_signed ? MO_SIGN : 0), + a->esz, tcg_int, a->shift, a->rn, rmode); + + if (!a->sf) { + tcg_gen_ext32u_i64(tcg_int, tcg_int); + } + return true; +} + +TRANS(FCVTNS_g, do_fcvt_g, a, FPROUNDING_TIEEVEN, true) +TRANS(FCVTNU_g, do_fcvt_g, a, FPROUNDING_TIEEVEN, false) +TRANS(FCVTPS_g, do_fcvt_g, a, FPROUNDING_POSINF, true) +TRANS(FCVTPU_g, do_fcvt_g, a, FPROUNDING_POSINF, false) +TRANS(FCVTMS_g, do_fcvt_g, a, FPROUNDING_NEGINF, true) +TRANS(FCVTMU_g, do_fcvt_g, a, FPROUNDING_NEGINF, false) +TRANS(FCVTZS_g, do_fcvt_g, a, FPROUNDING_ZERO, true) +TRANS(FCVTZU_g, do_fcvt_g, a, FPROUNDING_ZERO, false) +TRANS(FCVTAS_g, do_fcvt_g, a, FPROUNDING_TIEAWAY, true) +TRANS(FCVTAU_g, do_fcvt_g, a, FPROUNDING_TIEAWAY, false) + static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof) { /* FMOV: gpr to or from float, double, or top half of quad fp reg, @@ -8844,33 +8813,11 @@ static void disas_fp_int_conv(DisasContext *s, uint32_t insn) switch (opcode) { case 2: /* SCVTF */ case 3: /* UCVTF */ - itof = true; - /* fallthru */ case 4: /* FCVTAS */ case 5: /* FCVTAU */ - if (rmode != 0) { - goto do_unallocated; - } - /* fallthru */ case 0: /* FCVT[NPMZ]S */ case 1: /* FCVT[NPMZ]U */ - switch (type) { - case 0: /* float32 */ - case 1: /* float64 */ - break; - case 3: /* float16 */ - if (!dc_isar_feature(aa64_fp16, s)) { - goto do_unallocated; - } - break; - default: - goto do_unallocated; - } - if (!fp_access_check(s)) { - return; - } - handle_fpfpcvt(s, rd, rn, opcode, itof, rmode, 64, sf, type); - break; + goto do_unallocated; default: switch (sf << 7 | type << 5 | rmode << 3 | opcode) { @@ -8924,7 +8871,7 @@ static void disas_data_proc_fp(DisasContext *s, uint32_t insn) unallocated_encoding(s); /* in decodetree */ } else if (extract32(insn, 21, 1) == 0) { /* Floating point to fixed point conversions */ - disas_fp_fixed_conv(s, insn); + unallocated_encoding(s); /* in decodetree */ } else { switch (extract32(insn, 10, 2)) { case 1: /* Floating point conditional compare */ diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode index 211346c4d9..5e170cec7a 100644 --- a/target/arm/tcg/a64.decode +++ b/target/arm/tcg/a64.decode @@ -1323,6 +1323,46 @@ FMAXV_s 0110 1110 00 11000 01111 10 ..... ..... @rr_q1e2 FMINV_h 0.00 1110 10 11000 01111 10 ..... ..... @qrr_h FMINV_s 0110 1110 10 11000 01111 10 ..... ..... @rr_q1e2 +# Conversion between floating-point and fixed-point (general register) + +&fcvt rd rn esz sf shift +%fcvt_shift32 10:5 !function=rsub_32 +%fcvt_shift64 10:6 !function=rsub_64 + +@fcvt32 0 ....... .. ...... 1..... rn:5 rd:5 \ + &fcvt sf=0 esz=%esz_hsd shift=%fcvt_shift32 +@fcvt64 1 ....... .. ...... ...... rn:5 rd:5 \ + &fcvt sf=1 esz=%esz_hsd shift=%fcvt_shift64 + +SCVTF_g . 0011110 .. 000010 ...... ..... ..... @fcvt32 +SCVTF_g . 0011110 .. 000010 ...... ..... ..... @fcvt64 +UCVTF_g . 0011110 .. 000011 ...... ..... ..... @fcvt32 +UCVTF_g . 0011110 .. 000011 ...... ..... ..... @fcvt64 + +FCVTZS_g . 0011110 .. 011000 ...... ..... ..... @fcvt32 +FCVTZS_g . 0011110 .. 011000 ...... ..... ..... @fcvt64 +FCVTZU_g . 0011110 .. 011001 ...... ..... ..... @fcvt32 +FCVTZU_g . 0011110 .. 011001 ...... ..... ..... @fcvt64 + +# Conversion between floating-point and integer (general register) + +@icvt sf:1 ....... .. ...... ...... rn:5 rd:5 \ + &fcvt esz=%esz_hsd shift=0 + +SCVTF_g . 0011110 .. 100010 000000 ..... ..... @icvt +UCVTF_g . 0011110 .. 100011 000000 ..... ..... @icvt + +FCVTNS_g . 0011110 .. 100000 000000 ..... ..... @icvt +FCVTNU_g . 0011110 .. 100001 000000 ..... ..... @icvt +FCVTPS_g . 0011110 .. 101000 000000 ..... ..... @icvt +FCVTPU_g . 0011110 .. 101001 000000 ..... ..... @icvt +FCVTMS_g . 0011110 .. 110000 000000 ..... ..... @icvt +FCVTMU_g . 0011110 .. 110001 000000 ..... ..... @icvt +FCVTZS_g . 0011110 .. 111000 000000 ..... ..... @icvt +FCVTZU_g . 0011110 .. 111001 000000 ..... ..... @icvt +FCVTAS_g . 0011110 .. 100100 000000 ..... ..... @icvt +FCVTAU_g . 0011110 .. 100101 000000 ..... ..... @icvt + # Floating-point data processing (1 source) FMOV_s 00011110 .. 1 000000 10000 ..... ..... @rr_hsd