}
/* 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;
env->fpu_status.float_exception_flags = 0;
s390_exc = s390_softfloat_exc_to_ieee(qemu_exc);
- /* Install the exceptions that we raised. */
- env->fpc |= s390_exc << 16;
+ /*
+ * IEEE-Underflow exception recognition exists if a tininess condition
+ * (underflow) exists and
+ * - The mask bit in the FPC is zero and the result is inexact
+ * - The mask bit in the FPC is one
+ * So tininess conditions that are not inexact don't trigger any
+ * underflow action in case the mask bit is not one.
+ */
+ if (!(s390_exc & S390_IEEE_MASK_INEXACT) &&
+ !((env->fpc >> 24) & S390_IEEE_MASK_UNDERFLOW)) {
+ s390_exc &= ~S390_IEEE_MASK_UNDERFLOW;
+ }
- /* Send signals for enabled exceptions. */
- s390_exc &= env->fpc >> 24;
- if (s390_exc) {
- tcg_s390_data_exception(env, s390_exc, retaddr);
+ /*
+ * FIXME:
+ * 1. Right now, all inexact conditions are inidicated as
+ * "truncated" (0) and never as "incremented" (1) in the DXC.
+ * 2. Only traps due to invalid/divbyzero are suppressing. Other traps
+ * are completing, meaning the target register has to be written!
+ * This, however will mean that we have to write the register before
+ * triggering the trap - impossible right now.
+ */
+
+ /*
+ * invalid/divbyzero cannot coexist with other conditions.
+ * overflow/underflow however can coexist with inexact, we have to
+ * handle it separatly.
+ */
+ if (s390_exc & ~S390_IEEE_MASK_INEXACT) {
+ if (s390_exc & ~S390_IEEE_MASK_INEXACT & env->fpc >> 24) {
+ /* trap condition - inexact reported along */
+ tcg_s390_data_exception(env, s390_exc, retaddr);
+ }
+ /* nontrap condition - inexact handled differently */
+ env->fpc |= (s390_exc & ~S390_IEEE_MASK_INEXACT) << 16;
+ }
+
+ /* inexact handling */
+ 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,
+ retaddr);
+ }
+ /* nontrap condition */
+ env->fpc |= (s390_exc & S390_IEEE_MASK_INEXACT) << 16;
}
}
-static inline int float_comp_to_cc(CPUS390XState *env, int float_compare)
+int float_comp_to_cc(CPUS390XState *env, FloatRelation float_compare)
{
- S390CPU *cpu = s390_env_get_cpu(env);
-
switch (float_compare) {
case float_relation_equal:
return 0;
case float_relation_unordered:
return 3;
default:
- cpu_abort(CPU(cpu), "unknown return value for float compare\n");
+ cpu_abort(env_cpu(env), "unknown return value for float compare\n");
}
}
}
}
+static inline uint8_t round_from_m34(uint32_t m34)
+{
+ return extract32(m34, 0, 4);
+}
+
+static inline bool xxc_from_m34(uint32_t m34)
+{
+ /* XxC is bit 1 of m4 */
+ return extract32(m34, 4 + 3 - 1, 1);
+}
+
/* 32-bit FP addition */
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;
}
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;
}
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);
}
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;
}
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;
}
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);
}
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;
}
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;
}
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);
}
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;
}
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;
}
{
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;
}
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);
}
{
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);
}
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;
}
/* convert 128-bit float to 64-bit float */
-uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
+uint64_t HELPER(ldxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint32_t m34)
{
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float64 ret = float128_to_float64(make_float128(ah, al), &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
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);
}
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);
}
/* convert 64-bit float to 32-bit float */
-uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
+uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2, uint32_t m34)
{
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float32 ret = float64_to_float32(f2, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 128-bit float to 32-bit float */
-uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al)
+uint64_t HELPER(lexb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint32_t m34)
{
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float32 ret = float128_to_float32(make_float128(ah, al), &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* 32-bit FP compare */
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());
+ FloatRelation cmp = float32_compare_quiet(f1, f2, &env->fpu_status);
+ handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
/* 64-bit FP compare */
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());
+ FloatRelation cmp = float64_compare_quiet(f1, f2, &env->fpu_status);
+ handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
uint64_t bh, uint64_t bl)
{
- int cmp = float128_compare_quiet(make_float128(ah, al),
- make_float128(bh, bl),
- &env->fpu_status);
- handle_exceptions(env, GETPC());
+ FloatRelation cmp = float128_compare_quiet(make_float128(ah, al),
+ make_float128(bh, bl),
+ &env->fpu_status);
+ handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
-static int swap_round_mode(CPUS390XState *env, int m3)
+int s390_swap_bfp_rounding_mode(CPUS390XState *env, int m3)
{
int ret = env->fpu_status.float_rounding_mode;
+
switch (m3) {
case 0:
/* current mode */
break;
case 1:
- /* biased round no nearest */
+ /* round to nearest with ties away from 0 */
+ set_float_rounding_mode(float_round_ties_away, &env->fpu_status);
+ break;
+ case 3:
+ /* round to prepare for shorter precision */
+ set_float_rounding_mode(float_round_to_odd, &env->fpu_status);
+ break;
case 4:
- /* round to nearest */
+ /* round to nearest with ties to even */
set_float_rounding_mode(float_round_nearest_even, &env->fpu_status);
break;
case 5:
/* round to -inf */
set_float_rounding_mode(float_round_down, &env->fpu_status);
break;
+ default:
+ g_assert_not_reached();
}
return ret;
}
+void s390_restore_bfp_rounding_mode(CPUS390XState *env, int old_mode)
+{
+ set_float_rounding_mode(old_mode, &env->fpu_status);
+}
+
/* convert 64-bit int to 32-bit float */
-uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3)
+uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float32 ret = int64_to_float32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit int to 64-bit float */
-uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
+uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float64 ret = int64_to_float64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit int to 128-bit float */
-uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
+uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float128 ret = int64_to_float128(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return RET128(ret);
}
/* convert 64-bit uint to 32-bit float */
-uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float32 ret = uint64_to_float32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit uint to 64-bit float */
-uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float64 ret = uint64_to_float64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit uint to 128-bit float */
-uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float128 ret = uint64_to_float128(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return RET128(ret);
}
/* convert 32-bit float to 64-bit int */
-uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
int64_t ret = float32_to_int64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit float to 64-bit int */
-uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
int64_t ret = float64_to_int64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 128-bit float to 64-bit int */
-uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
+uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float128 v2 = make_float128(h, l);
int64_t ret = float128_to_int64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 32-bit float to 32-bit int */
-uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
int32_t ret = float32_to_int32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit float to 32-bit int */
-uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
int32_t ret = float64_to_int32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 128-bit float to 32-bit int */
-uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
+uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float128 v2 = make_float128(h, l);
int32_t ret = float128_to_int32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 32-bit float to 64-bit uint */
-uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
uint64_t ret;
+
v2 = float32_to_float64(v2, &env->fpu_status);
ret = float64_to_uint64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit float to 64-bit uint */
-uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
uint64_t ret = float64_to_uint64(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 128-bit float to 64-bit uint */
-uint64_t HELPER(clgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
+uint64_t HELPER(clgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
uint64_t ret = float128_to_uint64(make_float128(h, l), &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 32-bit float to 32-bit uint */
-uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
uint32_t ret = float32_to_uint32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 64-bit float to 32-bit uint */
-uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
uint32_t ret = float64_to_uint32(v2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* convert 128-bit float to 32-bit uint */
-uint64_t HELPER(clfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
+uint64_t HELPER(clfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
uint32_t ret = float128_to_uint32(make_float128(h, l), &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* round to integer 32-bit */
-uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
+uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float32 ret = float32_round_to_int(f2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* round to integer 64-bit */
-uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
+uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float64 ret = float64_round_to_int(f2, &env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return ret;
}
/* round to integer 128-bit */
-uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint32_t m3)
+uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint32_t m34)
{
- int hold = swap_round_mode(env, m3);
+ int old_mode = s390_swap_bfp_rounding_mode(env, round_from_m34(m34));
float128 ret = float128_round_to_int(make_float128(ah, al),
&env->fpu_status);
- set_float_rounding_mode(hold, &env->fpu_status);
- handle_exceptions(env, GETPC());
+
+ s390_restore_bfp_rounding_mode(env, old_mode);
+ handle_exceptions(env, xxc_from_m34(m34), GETPC());
return RET128(ret);
}
/* 32-bit FP compare and signal */
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());
+ FloatRelation cmp = float32_compare(f1, f2, &env->fpu_status);
+ handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
/* 64-bit FP compare and signal */
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());
+ FloatRelation cmp = float64_compare(f1, f2, &env->fpu_status);
+ handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
uint32_t HELPER(kxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
uint64_t bh, uint64_t bl)
{
- int cmp = float128_compare(make_float128(ah, al),
- make_float128(bh, bl),
- &env->fpu_status);
- handle_exceptions(env, GETPC());
+ FloatRelation cmp = float128_compare(make_float128(ah, al),
+ make_float128(bh, bl),
+ &env->fpu_status);
+ handle_exceptions(env, false, GETPC());
return float_comp_to_cc(env, cmp);
}
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;
}
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;
}
{
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;
}
{
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;
}
}
#define DEF_FLOAT_DCMASK(_TYPE) \
-static uint16_t _TYPE##_dcmask(CPUS390XState *env, _TYPE f1) \
+uint16_t _TYPE##_dcmask(CPUS390XState *env, _TYPE f1) \
{ \
const bool neg = _TYPE##_is_neg(f1); \
\
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;
}
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;
}
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);
}
-static const int fpc_to_rnd[4] = {
+static const int fpc_to_rnd[8] = {
float_round_nearest_even,
float_round_to_zero,
float_round_up,
- float_round_down
+ float_round_down,
+ -1,
+ -1,
+ -1,
+ float_round_to_odd,
};
/* set fpc */
void HELPER(sfpc)(CPUS390XState *env, uint64_t fpc)
{
+ if (fpc_to_rnd[fpc & 0x7] == -1 || fpc & 0x03030088u ||
+ (!s390_has_feat(S390_FEAT_FLOATING_POINT_EXT) && fpc & 0x4)) {
+ tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC());
+ }
+
/* Install everything in the main FPC. */
env->fpc = fpc;
/* Install the rounding mode in the shadow fpu_status. */
- set_float_rounding_mode(fpc_to_rnd[fpc & 3], &env->fpu_status);
+ set_float_rounding_mode(fpc_to_rnd[fpc & 0x7], &env->fpu_status);
}
/* set fpc and signal */
-void HELPER(sfas)(CPUS390XState *env, uint64_t val)
+void HELPER(sfas)(CPUS390XState *env, uint64_t fpc)
{
uint32_t signalling = env->fpc;
- uint32_t source = val;
uint32_t s390_exc;
- /* The contents of the source operand are placed in the FPC register;
- then the flags in the FPC register are set to the logical OR of the
- signalling flags and the source flags. */
- env->fpc = source | (signalling & 0x00ff0000);
- set_float_rounding_mode(fpc_to_rnd[source & 3], &env->fpu_status);
+ if (fpc_to_rnd[fpc & 0x7] == -1 || fpc & 0x03030088u ||
+ (!s390_has_feat(S390_FEAT_FLOATING_POINT_EXT) && fpc & 0x4)) {
+ tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC());
+ }
- /* If any signalling flag is 1 and the corresponding source mask
- is also 1, a simulated-iee-exception trap occurs. */
- s390_exc = (signalling >> 16) & (source >> 24);
+ /*
+ * FPC is set to the FPC operand with a bitwise OR of the signalling
+ * flags.
+ */
+ env->fpc = fpc | (signalling & 0x00ff0000);
+ set_float_rounding_mode(fpc_to_rnd[fpc & 0x7], &env->fpu_status);
+
+ /*
+ * If any signaling flag is enabled in the new FPC mask, a
+ * simulated-iee-exception exception occurs.
+ */
+ s390_exc = (signalling >> 16) & (fpc >> 24);
if (s390_exc) {
+ if (s390_exc & S390_IEEE_MASK_INVALID) {
+ s390_exc = S390_IEEE_MASK_INVALID;
+ } else if (s390_exc & S390_IEEE_MASK_DIVBYZERO) {
+ s390_exc = S390_IEEE_MASK_DIVBYZERO;
+ } else if (s390_exc & S390_IEEE_MASK_OVERFLOW) {
+ s390_exc &= (S390_IEEE_MASK_OVERFLOW | S390_IEEE_MASK_INEXACT);
+ } else if (s390_exc & S390_IEEE_MASK_UNDERFLOW) {
+ s390_exc &= (S390_IEEE_MASK_UNDERFLOW | S390_IEEE_MASK_INEXACT);
+ } else if (s390_exc & S390_IEEE_MASK_INEXACT) {
+ s390_exc = S390_IEEE_MASK_INEXACT;
+ } else if (s390_exc & S390_IEEE_MASK_QUANTUM) {
+ s390_exc = S390_IEEE_MASK_QUANTUM;
+ }
tcg_s390_data_exception(env, s390_exc | 3, GETPC());
}
}
+
+/* set bfp rounding mode */
+void HELPER(srnm)(CPUS390XState *env, uint64_t rnd)
+{
+ if (rnd > 0x7 || fpc_to_rnd[rnd & 0x7] == -1) {
+ tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC());
+ }
+
+ env->fpc = deposit32(env->fpc, 0, 3, rnd);
+ set_float_rounding_mode(fpc_to_rnd[rnd & 0x7], &env->fpu_status);
+}
projects / qemu.git / blobdiff