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target/loongarch: Fix emulation of float-point disable exception

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We need to emulate it to generate a floating point disable exception
when CSR.EUEN.FPE is zero.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Rui Wang <wangrui@loongson.cn>
Message-Id: <20221104040517.222059-3-wangrui@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Rui Wang 2022-11-04 12:05:17 +08:00 • committed by Song Gao
parent b4bda2006f
commit 2419978cb0
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GPG key ID: 40A2FFF239263EDF
6 changed files with 97 additions and 11 deletions
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29
target/loongarch/insn_trans/trans_fmov.c.inc
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@ -10,8 +10,11 @@ static const uint32_t fcsr_mask[4] = {
static bool trans_fsel(DisasContext *ctx, arg_fsel *a)
{
TCGv zero = tcg_constant_tl(0);
TCGv cond = tcg_temp_new();
TCGv cond;
CHECK_FPE;
cond = tcg_temp_new();
tcg_gen_ld8u_tl(cond, cpu_env, offsetof(CPULoongArchState, cf[a->ca]));
tcg_gen_movcond_tl(TCG_COND_EQ, cpu_fpr[a->fd], cond, zero,
cpu_fpr[a->fj], cpu_fpr[a->fk]);
@ -26,6 +29,8 @@ static bool gen_f2f(DisasContext *ctx, arg_ff *a,
TCGv dest = cpu_fpr[a->fd];
TCGv src = cpu_fpr[a->fj];
CHECK_FPE;
func(dest, src);
if (nanbox) {
gen_nanbox_s(cpu_fpr[a->fd], cpu_fpr[a->fd]);
@ -39,6 +44,8 @@ static bool gen_r2f(DisasContext *ctx, arg_fr *a,
{
TCGv src = gpr_src(ctx, a->rj, EXT_NONE);
CHECK_FPE;
func(cpu_fpr[a->fd], src);
return true;
}
@ -48,6 +55,8 @@ static bool gen_f2r(DisasContext *ctx, arg_rf *a,
{
TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE);
CHECK_FPE;
func(dest, cpu_fpr[a->fj]);
gen_set_gpr(a->rd, dest, EXT_NONE);
@ -59,6 +68,8 @@ static bool trans_movgr2fcsr(DisasContext *ctx, arg_movgr2fcsr *a)
uint32_t mask = fcsr_mask[a->fcsrd];
TCGv Rj = gpr_src(ctx, a->rj, EXT_NONE);
CHECK_FPE;
if (mask == UINT32_MAX) {
tcg_gen_st32_i64(Rj, cpu_env, offsetof(CPULoongArchState, fcsr0));
} else {
@ -90,6 +101,8 @@ static bool trans_movfcsr2gr(DisasContext *ctx, arg_movfcsr2gr *a)
{
TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE);
CHECK_FPE;
tcg_gen_ld32u_i64(dest, cpu_env, offsetof(CPULoongArchState, fcsr0));
tcg_gen_andi_i64(dest, dest, fcsr_mask[a->fcsrs]);
gen_set_gpr(a->rd, dest, EXT_NONE);
@ -114,8 +127,11 @@ static void gen_movfrh2gr_s(TCGv dest, TCGv src)
static bool trans_movfr2cf(DisasContext *ctx, arg_movfr2cf *a)
{
TCGv t0 = tcg_temp_new();
TCGv t0;
CHECK_FPE;
t0 = tcg_temp_new();
tcg_gen_andi_tl(t0, cpu_fpr[a->fj], 0x1);
tcg_gen_st8_tl(t0, cpu_env, offsetof(CPULoongArchState, cf[a->cd & 0x7]));
tcg_temp_free(t0);
@ -125,6 +141,8 @@ static bool trans_movfr2cf(DisasContext *ctx, arg_movfr2cf *a)
static bool trans_movcf2fr(DisasContext *ctx, arg_movcf2fr *a)
{
CHECK_FPE;
tcg_gen_ld8u_tl(cpu_fpr[a->fd], cpu_env,
offsetof(CPULoongArchState, cf[a->cj & 0x7]));
return true;
@ -132,8 +150,11 @@ static bool trans_movcf2fr(DisasContext *ctx, arg_movcf2fr *a)
static bool trans_movgr2cf(DisasContext *ctx, arg_movgr2cf *a)
{
TCGv t0 = tcg_temp_new();
TCGv t0;
CHECK_FPE;
t0 = tcg_temp_new();
tcg_gen_andi_tl(t0, gpr_src(ctx, a->rj, EXT_NONE), 0x1);
tcg_gen_st8_tl(t0, cpu_env, offsetof(CPULoongArchState, cf[a->cd & 0x7]));
tcg_temp_free(t0);
@ -143,6 +164,8 @@ static bool trans_movgr2cf(DisasContext *ctx, arg_movgr2cf *a)
static bool trans_movcf2gr(DisasContext *ctx, arg_movcf2gr *a)
{
CHECK_FPE;
tcg_gen_ld8u_tl(gpr_dst(ctx, a->rd, EXT_NONE), cpu_env,
offsetof(CPULoongArchState, cf[a->cj & 0x7]));
return true;