motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-06 09:13:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target/arm: Convert FRINT[NPMSAXI] (scalar) to decodetree

Browse source 
Remove handle_fp_1src_half 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: 20241211163036.2297116-29-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-11 10:29:55 -06:00 • committed by Peter Maydell
parent dbc739724a
commit cf85790bb8
2 changed files with 46 additions and 79 deletions
Download patch file Download diff file Expand all files Collapse all files

8
target/arm/tcg/a64.decode
View file

@ -1329,6 +1329,14 @@ FABS_s 00011110 .. 1 000001 10000 ..... ..... @rr_hsd
FNEG_s 00011110 .. 1 000010 10000 ..... ..... @rr_hsd
FSQRT_s 00011110 .. 1 000011 10000 ..... ..... @rr_hsd
FRINTN_s 00011110 .. 1 001000 10000 ..... ..... @rr_hsd
FRINTP_s 00011110 .. 1 001001 10000 ..... ..... @rr_hsd
FRINTM_s 00011110 .. 1 001010 10000 ..... ..... @rr_hsd
FRINTZ_s 00011110 .. 1 001011 10000 ..... ..... @rr_hsd
FRINTA_s 00011110 .. 1 001100 10000 ..... ..... @rr_hsd
FRINTX_s 00011110 .. 1 001110 10000 ..... ..... @rr_hsd
FRINTI_s 00011110 .. 1 001111 10000 ..... ..... @rr_hsd
# Floating-point Immediate
FMOVI_s 0001 1110 .. 1 imm:8 100 00000 rd:5 esz=%esz_hsd

117
target/arm/tcg/translate-a64.c
View file

@ -8401,46 +8401,24 @@ static const FPScalar1 f_scalar_fsqrt = {
};
TRANS(FSQRT_s, do_fp1_scalar, a, &f_scalar_fsqrt, -1)
/* Floating-point data-processing (1 source) - half precision */
static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn)
{
TCGv_ptr fpst = NULL;
TCGv_i32 tcg_op = read_fp_hreg(s, rn);
TCGv_i32 tcg_res = tcg_temp_new_i32();
static const FPScalar1 f_scalar_frint = {
gen_helper_advsimd_rinth,
gen_helper_rints,
gen_helper_rintd,
};
TRANS(FRINTN_s, do_fp1_scalar, a, &f_scalar_frint, FPROUNDING_TIEEVEN)
TRANS(FRINTP_s, do_fp1_scalar, a, &f_scalar_frint, FPROUNDING_POSINF)
TRANS(FRINTM_s, do_fp1_scalar, a, &f_scalar_frint, FPROUNDING_NEGINF)
TRANS(FRINTZ_s, do_fp1_scalar, a, &f_scalar_frint, FPROUNDING_ZERO)
TRANS(FRINTA_s, do_fp1_scalar, a, &f_scalar_frint, FPROUNDING_TIEAWAY)
TRANS(FRINTI_s, do_fp1_scalar, a, &f_scalar_frint, -1)
switch (opcode) {
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
{
TCGv_i32 tcg_rmode;
fpst = fpstatus_ptr(FPST_FPCR_F16);
tcg_rmode = gen_set_rmode(opcode & 7, fpst);
gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
gen_restore_rmode(tcg_rmode, fpst);
break;
}
case 0xe: /* FRINTX */
fpst = fpstatus_ptr(FPST_FPCR_F16);
gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, fpst);
break;
case 0xf: /* FRINTI */
fpst = fpstatus_ptr(FPST_FPCR_F16);
gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
break;
default:
case 0x0: /* FMOV */
case 0x1: /* FABS */
case 0x2: /* FNEG */
case 0x3: /* FSQRT */
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_res);
}
static const FPScalar1 f_scalar_frintx = {
gen_helper_advsimd_rinth_exact,
gen_helper_rints_exact,
gen_helper_rintd_exact,
};
TRANS(FRINTX_s, do_fp1_scalar, a, &f_scalar_frintx, -1)
/* Floating-point data-processing (1 source) - single precision */
static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
@ -8457,20 +8435,6 @@ static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
case 0x6: /* BFCVT */
gen_fpst = gen_helper_bfcvt;
break;
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
rmode = opcode & 7;
gen_fpst = gen_helper_rints;
break;
case 0xe: /* FRINTX */
gen_fpst = gen_helper_rints_exact;
break;
case 0xf: /* FRINTI */
gen_fpst = gen_helper_rints;
break;
case 0x10: /* FRINT32Z */
rmode = FPROUNDING_ZERO;
gen_fpst = gen_helper_frint32_s;
@ -8490,6 +8454,13 @@ static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
case 0x1: /* FABS */
case 0x2: /* FNEG */
case 0x3: /* FSQRT */
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
case 0xe: /* FRINTX */
case 0xf: /* FRINTI */
g_assert_not_reached();
}
@ -8517,20 +8488,6 @@ static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
tcg_res = tcg_temp_new_i64();
switch (opcode) {
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
rmode = opcode & 7;
gen_fpst = gen_helper_rintd;
break;
case 0xe: /* FRINTX */
gen_fpst = gen_helper_rintd_exact;
break;
case 0xf: /* FRINTI */
gen_fpst = gen_helper_rintd;
break;
case 0x10: /* FRINT32Z */
rmode = FPROUNDING_ZERO;
gen_fpst = gen_helper_frint32_d;
@ -8550,6 +8507,13 @@ static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
case 0x1: /* FABS */
case 0x2: /* FNEG */
case 0x3: /* FSQRT */
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
case 0xe: /* FRINTX */
case 0xf: /* FRINTI */
g_assert_not_reached();
}
@ -8668,9 +8632,6 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn)
if (type > 1 || !dc_isar_feature(aa64_frint, s)) {
goto do_unallocated;
}
/* fall through */
case 0x8 ... 0xc:
case 0xe ... 0xf:
/* 32-to-32 and 64-to-64 ops */
switch (type) {
case 0:
@ -8686,15 +8647,6 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn)
handle_fp_1src_double(s, opcode, rd, rn);
break;
case 3:
if (!dc_isar_feature(aa64_fp16, s)) {
goto do_unallocated;
}
if (!fp_access_check(s)) {
return;
}
handle_fp_1src_half(s, opcode, rd, rn);
break;
default:
goto do_unallocated;
}
@ -8722,6 +8674,13 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn)
case 0x1: /* FABS */
case 0x2: /* FNEG */
case 0x3: /* FSQRT */
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
case 0xe: /* FRINTX */
case 0xf: /* FRINTI */
unallocated_encoding(s);
break;
}