提交 cf97f9ff 编写于 作者: D David Hildenbrand 提交者: Cornelia Huck

s390x/tcg: Prepare for IEEE-inexact-exception control (XxC)

Some instructions allow to suppress IEEE inexact exceptions.

z14 PoP, 9-23, "Suppression of Certain IEEE Exceptions"
    IEEE-inexact-exception control (XxC): Bit 1 of
    the M4 field is the XxC bit. If XxC is zero, recogni-
    tion of IEEE-inexact exception is not suppressed;
    if XxC is one, recognition of IEEE-inexact excep-
    tion is suppressed.

Especially, handling for overflow/unerflow remains as is, inexact is
reported along

z14 PoP, 9-23, "Suppression of Certain IEEE Exceptions"
    For example, the IEEE-inexact-exception control (XxC)
    has no effect on the DXC; that is, the DXC for IEEE-
    overflow or IEEE-underflow exceptions along with the
    detail for exact, inexact and truncated, or inexact and
    incremented, is reported according to the actual con-
    dition.

Follow up patches will wire it correctly up for the applicable
instructions.
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Message-Id: <20190218122710.23639-12-david@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>
上级 c0ee7015
......@@ -50,7 +50,7 @@ uint8_t s390_softfloat_exc_to_ieee(unsigned int exc)
}
/* Should be called after any operation that may raise IEEE exceptions. */
static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr)
static void handle_exceptions(CPUS390XState *env, bool XxC, uintptr_t retaddr)
{
unsigned s390_exc, qemu_exc;
......@@ -101,7 +101,7 @@ static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr)
}
/* inexact handling */
if (s390_exc & S390_IEEE_MASK_INEXACT) {
if (s390_exc & S390_IEEE_MASK_INEXACT && !XxC) {
/* trap condition - overflow/underflow _not_ reported along */
if (s390_exc & S390_IEEE_MASK_INEXACT & env->fpc >> 24) {
tcg_s390_data_exception(env, s390_exc & S390_IEEE_MASK_INEXACT,
......@@ -174,7 +174,7 @@ uint32_t set_cc_nz_f128(float128 v)
uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float32 ret = float32_add(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -182,7 +182,7 @@ uint64_t HELPER(aeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
uint64_t HELPER(adb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float64 ret = float64_add(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -193,7 +193,7 @@ uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al,
float128 ret = float128_add(make_float128(ah, al),
make_float128(bh, bl),
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -201,7 +201,7 @@ uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al,
uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float32 ret = float32_sub(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -209,7 +209,7 @@ uint64_t HELPER(seb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
uint64_t HELPER(sdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float64 ret = float64_sub(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -220,7 +220,7 @@ uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
float128 ret = float128_sub(make_float128(ah, al),
make_float128(bh, bl),
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -228,7 +228,7 @@ uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float32 ret = float32_div(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -236,7 +236,7 @@ uint64_t HELPER(deb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
uint64_t HELPER(ddb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float64 ret = float64_div(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -247,7 +247,7 @@ uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
float128 ret = float128_div(make_float128(ah, al),
make_float128(bh, bl),
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -255,7 +255,7 @@ uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float32 ret = float32_mul(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -263,7 +263,7 @@ uint64_t HELPER(meeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
uint64_t HELPER(mdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float64 ret = float64_mul(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -272,7 +272,7 @@ uint64_t HELPER(mdeb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
float64 ret = float32_to_float64(f2, &env->fpu_status);
ret = float64_mul(f1, ret, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -283,7 +283,7 @@ uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
float128 ret = float128_mul(make_float128(ah, al),
make_float128(bh, bl),
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -293,7 +293,7 @@ uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al,
{
float128 ret = float64_to_float128(f2, &env->fpu_status);
ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -301,7 +301,7 @@ uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al,
uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2)
{
float64 ret = float32_to_float64(f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -309,7 +309,7 @@ uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2)
uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
{
float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -317,7 +317,7 @@ uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2)
{
float128 ret = float64_to_float128(f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -325,7 +325,7 @@ uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2)
uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2)
{
float128 ret = float32_to_float128(f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -333,7 +333,7 @@ uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2)
uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
{
float32 ret = float64_to_float32(f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -341,7 +341,7 @@ uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al)
{
float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -349,7 +349,7 @@ uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al)
uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
int cmp = float32_compare_quiet(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
......@@ -357,7 +357,7 @@ uint32_t HELPER(ceb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
uint32_t HELPER(cdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
int cmp = float64_compare_quiet(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
......@@ -368,7 +368,7 @@ uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
int cmp = float128_compare_quiet(make_float128(ah, al),
make_float128(bh, bl),
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
......@@ -413,7 +413,7 @@ uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3)
float32 ret = int64_to_float32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -424,7 +424,7 @@ uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
float64 ret = int64_to_float64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -435,7 +435,7 @@ uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
float128 ret = int64_to_float128(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -446,7 +446,7 @@ uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
float32 ret = uint64_to_float32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -457,7 +457,7 @@ uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
float64 ret = uint64_to_float64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -468,7 +468,7 @@ uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
float128 ret = uint64_to_float128(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -479,7 +479,7 @@ uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
int64_t ret = float32_to_int64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -490,7 +490,7 @@ uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
int64_t ret = float64_to_int64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -502,7 +502,7 @@ uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
int64_t ret = float128_to_int64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -513,7 +513,7 @@ uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
int32_t ret = float32_to_int32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -524,7 +524,7 @@ uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
int32_t ret = float64_to_int32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -536,7 +536,7 @@ uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
int32_t ret = float128_to_int32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -549,7 +549,7 @@ uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
v2 = float32_to_float64(v2, &env->fpu_status);
ret = float64_to_uint64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -560,7 +560,7 @@ uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
uint64_t ret = float64_to_uint64(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -571,7 +571,7 @@ uint64_t HELPER(clgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
uint64_t ret = float128_to_uint64(make_float128(h, l), &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -582,7 +582,7 @@ uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
uint32_t ret = float32_to_uint32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -593,7 +593,7 @@ uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
uint32_t ret = float64_to_uint32(v2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -604,7 +604,7 @@ uint64_t HELPER(clfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
uint32_t ret = float128_to_uint32(make_float128(h, l), &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -615,7 +615,7 @@ uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
float32 ret = float32_round_to_int(f2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -626,7 +626,7 @@ uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
float64 ret = float64_round_to_int(f2, &env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -634,11 +634,11 @@ uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint32_t m3)
{
int old_mode = s390_swap_bfp_rounding_mode(env, m3);
float128 ret = float128_round_to_int(make_float128(ah, al),
&env->fpu_status);
s390_restore_bfp_rounding_mode(env, old_mode);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......@@ -646,7 +646,7 @@ uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint32_t m3)
uint32_t HELPER(keb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
int cmp = float32_compare(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
......@@ -654,7 +654,7 @@ uint32_t HELPER(keb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
uint32_t HELPER(kdb)(CPUS390XState *env, uint64_t f1, uint64_t f2)
{
int cmp = float64_compare(f1, f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
......@@ -665,7 +665,7 @@ uint32_t HELPER(kxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
int cmp = float128_compare(make_float128(ah, al),
make_float128(bh, bl),
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
......@@ -674,7 +674,7 @@ uint64_t HELPER(maeb)(CPUS390XState *env, uint64_t f1,
uint64_t f2, uint64_t f3)
{
float32 ret = float32_muladd(f2, f3, f1, 0, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -683,7 +683,7 @@ uint64_t HELPER(madb)(CPUS390XState *env, uint64_t f1,
uint64_t f2, uint64_t f3)
{
float64 ret = float64_muladd(f2, f3, f1, 0, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -693,7 +693,7 @@ uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1,
{
float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c,
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -703,7 +703,7 @@ uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1,
{
float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c,
&env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -759,7 +759,7 @@ uint32_t HELPER(tcxb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint64_t m2)
uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
{
float32 ret = float32_sqrt(f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -767,7 +767,7 @@ uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
{
float64 ret = float64_sqrt(f2, &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return ret;
}
......@@ -775,7 +775,7 @@ uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
{
float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status);
handle_exceptions(env, GETPC());
handle_exceptions(env, false, GETPC());
return RET128(ret);
}
......
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