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target/arm: Restructure handle_fp_1src_{single, double}

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This will allow sharing code that adjusts rmode beyond
the existing users.

Backports commit 0e4db23d1fdbfed4fc1ec19b6e59820209600358 from qemu
This commit is contained in:
Richard Henderson 2019-03-05 23:09:46 -05:00 committed by Lioncash
parent 94b5aab8f8
commit f855ac073d
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 49 additions and 40 deletions
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89
qemu/target/arm/translate-a64.c
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@ -5804,55 +5804,59 @@ static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn)
static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
void (*gen_fpst)(TCGContext *, TCGv_i32, TCGv_i32, TCGv_ptr);
TCGv_i32 tcg_op, tcg_res;
TCGv_ptr fpst;
TCGv_i32 tcg_op;
TCGv_i32 tcg_res;
int rmode = -1;
fpst = get_fpstatus_ptr(s, false);
tcg_op = read_fp_sreg(s, rn);
tcg_res = tcg_temp_new_i32(tcg_ctx);
switch (opcode) {
case 0x0: /* FMOV */
tcg_gen_mov_i32(tcg_ctx, tcg_res, tcg_op);
break;
goto done;
case 0x1: /* FABS */
gen_helper_vfp_abss(tcg_ctx, tcg_res, tcg_op);
break;
goto done;
case 0x2: /* FNEG */
gen_helper_vfp_negs(tcg_ctx, tcg_res, tcg_op);
break;
goto done;
case 0x3: /* FSQRT */
gen_helper_vfp_sqrts(tcg_ctx, tcg_res, tcg_op, tcg_ctx->cpu_env);
break;
goto done;
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
{
TCGv_i32 tcg_rmode = tcg_const_i32(tcg_ctx, arm_rmode_to_sf(opcode & 7));
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
gen_helper_rints(tcg_ctx, tcg_res, tcg_op, fpst);
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
tcg_temp_free_i32(tcg_ctx, tcg_rmode);
rmode = arm_rmode_to_sf(opcode & 7);
gen_fpst = gen_helper_rints;
break;
}
case 0xe: /* FRINTX */
gen_helper_rints_exact(tcg_ctx, tcg_res, tcg_op, fpst);
gen_fpst = gen_helper_rints_exact;
break;
case 0xf: /* FRINTI */
gen_helper_rints(tcg_ctx, tcg_res, tcg_op, fpst);
gen_fpst = gen_helper_rints;
break;
default:
abort();
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_res);
fpst = get_fpstatus_ptr(s, false);
if (rmode >= 0) {
TCGv_i32 tcg_rmode = tcg_const_i32(tcg_ctx, rmode);
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
gen_fpst(tcg_ctx, tcg_res, tcg_op, fpst);
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
tcg_temp_free_i32(tcg_ctx, tcg_rmode);
} else {
gen_fpst(tcg_ctx, tcg_res, tcg_op, fpst);
}
tcg_temp_free_ptr(tcg_ctx, fpst);
done:
write_fp_sreg(s, rd, tcg_res);
tcg_temp_free_i32(tcg_ctx, tcg_op);
tcg_temp_free_i32(tcg_ctx, tcg_res);
}
@ -5861,9 +5865,10 @@ static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
void (*gen_fpst)(TCGContext *, TCGv_i64, TCGv_i64, TCGv_ptr);
TCGv_i64 tcg_op, tcg_res;
TCGv_ptr fpst;
TCGv_i64 tcg_op;
TCGv_i64 tcg_res;
int rmode = -1;
switch (opcode) {
case 0x0: /* FMOV */
@ -5871,48 +5876,52 @@ static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
return;
}
fpst = get_fpstatus_ptr(s, false);
tcg_op = read_fp_dreg(s, rn);
tcg_res = tcg_temp_new_i64(tcg_ctx);
switch (opcode) {
case 0x1: /* FABS */
gen_helper_vfp_absd(tcg_ctx, tcg_res, tcg_op);
break;
goto done;
case 0x2: /* FNEG */
gen_helper_vfp_negd(tcg_ctx, tcg_res, tcg_op);
break;
goto done;
case 0x3: /* FSQRT */
gen_helper_vfp_sqrtd(tcg_ctx, tcg_res, tcg_op, tcg_ctx->cpu_env);
break;
goto done;
case 0x8: /* FRINTN */
case 0x9: /* FRINTP */
case 0xa: /* FRINTM */
case 0xb: /* FRINTZ */
case 0xc: /* FRINTA */
{
TCGv_i32 tcg_rmode = tcg_const_i32(tcg_ctx, arm_rmode_to_sf(opcode & 7));
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
gen_helper_rintd(tcg_ctx, tcg_res, tcg_op, fpst);
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
tcg_temp_free_i32(tcg_ctx, tcg_rmode);
rmode = arm_rmode_to_sf(opcode & 7);
gen_fpst = gen_helper_rintd;
break;
}
case 0xe: /* FRINTX */
gen_helper_rintd_exact(tcg_ctx, tcg_res, tcg_op, fpst);
gen_fpst = gen_helper_rintd_exact;
break;
case 0xf: /* FRINTI */
gen_helper_rintd(tcg_ctx, tcg_res, tcg_op, fpst);
gen_fpst = gen_helper_rintd;
break;
default:
abort();
g_assert_not_reached();
}
write_fp_dreg(s, rd, tcg_res);
fpst = get_fpstatus_ptr(s, false);
if (rmode >= 0) {
TCGv_i32 tcg_rmode = tcg_const_i32(tcg_ctx, rmode);
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
gen_fpst(tcg_ctx, tcg_res, tcg_op, fpst);
gen_helper_set_rmode(tcg_ctx, tcg_rmode, tcg_rmode, fpst);
tcg_temp_free_i32(tcg_ctx, tcg_rmode);
} else {
gen_fpst(tcg_ctx, tcg_res, tcg_op, fpst);
}
tcg_temp_free_ptr(tcg_ctx, fpst);
done:
write_fp_dreg(s, rd, tcg_res);
tcg_temp_free_i64(tcg_ctx, tcg_op);
tcg_temp_free_i64(tcg_ctx, tcg_res);
}