--- /dev/null
+/*
+ * S/390 FPU helper routines
+ *
+ * Copyright (c) 2009 Ulrich Hecht
+ * Copyright (c) 2009 Alexander Graf
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "exec/cpu_ldst.h"
+#include "exec/helper-proto.h"
+
+/* #define DEBUG_HELPER */
+#ifdef DEBUG_HELPER
+#define HELPER_LOG(x...) qemu_log(x)
+#else
+#define HELPER_LOG(x...)
+#endif
+
+#define RET128(F) (env->retxl = F.low, F.high)
+
+#define convert_bit(mask, from, to) \
+ (to < from \
+ ? (mask / (from / to)) & to \
+ : (mask & from) * (to / from))
+
+static void ieee_exception(CPUS390XState *env, uint32_t dxc, uintptr_t retaddr)
+{
+ /* Install the DXC code. */
+ env->fpc = (env->fpc & ~0xff00) | (dxc << 8);
+ /* Trap. */
+ runtime_exception(env, PGM_DATA, retaddr);
+}
+
+/* Should be called after any operation that may raise IEEE exceptions. */
+static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr)
+{
+ unsigned s390_exc, qemu_exc;
+
+ /* Get the exceptions raised by the current operation. Reset the
+ fpu_status contents so that the next operation has a clean slate. */
+ qemu_exc = env->fpu_status.float_exception_flags;
+ if (qemu_exc == 0) {
+ return;
+ }
+ env->fpu_status.float_exception_flags = 0;
+
+ /* Convert softfloat exception bits to s390 exception bits. */
+ s390_exc = 0;
+ s390_exc |= convert_bit(qemu_exc, float_flag_invalid, 0x80);
+ s390_exc |= convert_bit(qemu_exc, float_flag_divbyzero, 0x40);
+ s390_exc |= convert_bit(qemu_exc, float_flag_overflow, 0x20);
+ s390_exc |= convert_bit(qemu_exc, float_flag_underflow, 0x10);
+ s390_exc |= convert_bit(qemu_exc, float_flag_inexact, 0x08);
+
+ /* Install the exceptions that we raised. */
+ env->fpc |= s390_exc << 16;
+
+ /* Send signals for enabled exceptions. */
+ s390_exc &= env->fpc >> 24;
+ if (s390_exc) {
+ ieee_exception(env, s390_exc, retaddr);
+ }
+}
+
+static inline int float_comp_to_cc(CPUS390XState *env, int float_compare)
+{
+ S390CPU *cpu = s390_env_get_cpu(env);
+
+ switch (float_compare) {
+ case float_relation_equal:
+ return 0;
+ case float_relation_less:
+ return 1;
+ case float_relation_greater:
+ return 2;
+ case float_relation_unordered:
+ return 3;
+ default:
+ cpu_abort(CPU(cpu), "unknown return value for float compare\n");
+ }
+}
+
+/* condition codes for unary FP ops */
+uint32_t set_cc_nz_f32(float32 v)
+{
+ if (float32_is_any_nan(v)) {
+ return 3;
+ } else if (float32_is_zero(v)) {
+ return 0;
+ } else if (float32_is_neg(v)) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+
+uint32_t set_cc_nz_f64(float64 v)
+{
+ if (float64_is_any_nan(v)) {
+ return 3;
+ } else if (float64_is_zero(v)) {
+ return 0;
+ } else if (float64_is_neg(v)) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+
+uint32_t set_cc_nz_f128(float128 v)
+{
+ if (float128_is_any_nan(v)) {
+ return 3;
+ } else if (float128_is_zero(v)) {
+ return 0;
+ } else if (float128_is_neg(v)) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+
+/* 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());
+ return ret;
+}
+
+/* 64-bit FP addition */
+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());
+ return ret;
+}
+
+/* 128-bit FP addition */
+uint64_t HELPER(axb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint64_t bh, uint64_t bl)
+{
+ float128 ret = float128_add(make_float128(ah, al),
+ make_float128(bh, bl),
+ &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* 32-bit FP subtraction */
+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());
+ return ret;
+}
+
+/* 64-bit FP subtraction */
+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());
+ return ret;
+}
+
+/* 128-bit FP subtraction */
+uint64_t HELPER(sxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint64_t bh, uint64_t bl)
+{
+ float128 ret = float128_sub(make_float128(ah, al),
+ make_float128(bh, bl),
+ &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* 32-bit FP division */
+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());
+ return ret;
+}
+
+/* 64-bit FP division */
+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());
+ return ret;
+}
+
+/* 128-bit FP division */
+uint64_t HELPER(dxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint64_t bh, uint64_t bl)
+{
+ float128 ret = float128_div(make_float128(ah, al),
+ make_float128(bh, bl),
+ &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* 32-bit FP multiplication */
+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());
+ return ret;
+}
+
+/* 64-bit FP multiplication */
+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());
+ return ret;
+}
+
+/* 64/32-bit FP multiplication */
+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());
+ return ret;
+}
+
+/* 128-bit FP multiplication */
+uint64_t HELPER(mxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint64_t bh, uint64_t bl)
+{
+ float128 ret = float128_mul(make_float128(ah, al),
+ make_float128(bh, bl),
+ &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* 128/64-bit FP multiplication */
+uint64_t HELPER(mxdb)(CPUS390XState *env, uint64_t ah, uint64_t al,
+ uint64_t f2)
+{
+ float128 ret = float64_to_float128(f2, &env->fpu_status);
+ ret = float128_mul(make_float128(ah, al), ret, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* convert 32-bit float to 64-bit float */
+uint64_t HELPER(ldeb)(CPUS390XState *env, uint64_t f2)
+{
+ float64 ret = float32_to_float64(f2, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return float64_maybe_silence_nan(ret);
+}
+
+/* convert 128-bit float to 64-bit float */
+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());
+ return float64_maybe_silence_nan(ret);
+}
+
+/* convert 64-bit float to 128-bit float */
+uint64_t HELPER(lxdb)(CPUS390XState *env, uint64_t f2)
+{
+ float128 ret = float64_to_float128(f2, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(float128_maybe_silence_nan(ret));
+}
+
+/* convert 32-bit float to 128-bit float */
+uint64_t HELPER(lxeb)(CPUS390XState *env, uint64_t f2)
+{
+ float128 ret = float32_to_float128(f2, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(float128_maybe_silence_nan(ret));
+}
+
+/* convert 64-bit float to 32-bit float */
+uint64_t HELPER(ledb)(CPUS390XState *env, uint64_t f2)
+{
+ float32 ret = float64_to_float32(f2, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return float32_maybe_silence_nan(ret);
+}
+
+/* convert 128-bit float to 32-bit float */
+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());
+ return float32_maybe_silence_nan(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());
+ 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());
+ return float_comp_to_cc(env, cmp);
+}
+
+/* 128-bit FP compare */
+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());
+ return float_comp_to_cc(env, cmp);
+}
+
+static int swap_round_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 */
+ case 4:
+ /* round to nearest */
+ set_float_rounding_mode(float_round_nearest_even, &env->fpu_status);
+ break;
+ case 5:
+ /* round to zero */
+ set_float_rounding_mode(float_round_to_zero, &env->fpu_status);
+ break;
+ case 6:
+ /* round to +inf */
+ set_float_rounding_mode(float_round_up, &env->fpu_status);
+ break;
+ case 7:
+ /* round to -inf */
+ set_float_rounding_mode(float_round_down, &env->fpu_status);
+ break;
+ }
+ return ret;
+}
+
+/* convert 64-bit int to 32-bit float */
+uint64_t HELPER(cegb)(CPUS390XState *env, int64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float32 ret = int64_to_float32(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit int to 64-bit float */
+uint64_t HELPER(cdgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float64 ret = int64_to_float64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit int to 128-bit float */
+uint64_t HELPER(cxgb)(CPUS390XState *env, int64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float128 ret = int64_to_float128(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* convert 64-bit uint to 32-bit float */
+uint64_t HELPER(celgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float32 ret = uint64_to_float32(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit uint to 64-bit float */
+uint64_t HELPER(cdlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float64 ret = uint64_to_float64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit uint to 128-bit float */
+uint64_t HELPER(cxlgb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float128 ret = uint64_to_float128(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return RET128(ret);
+}
+
+/* convert 32-bit float to 64-bit int */
+uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ int64_t ret = float32_to_int64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit float to 64-bit int */
+uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ int64_t ret = float64_to_int64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, 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)
+{
+ int hold = swap_round_mode(env, m3);
+ 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());
+ return ret;
+}
+
+/* convert 32-bit float to 32-bit int */
+uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ int32_t ret = float32_to_int32(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit float to 32-bit int */
+uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ int32_t ret = float64_to_int32(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, 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)
+{
+ int hold = swap_round_mode(env, m3);
+ 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());
+ return ret;
+}
+
+/* convert 32-bit float to 64-bit uint */
+uint64_t HELPER(clgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ 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());
+ return ret;
+}
+
+/* convert 64-bit float to 64-bit uint */
+uint64_t HELPER(clgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ uint64_t ret = float64_to_uint64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, 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)
+{
+ int hold = swap_round_mode(env, m3);
+ float128 v2 = make_float128(h, l);
+ /* ??? Not 100% correct. */
+ uint64_t ret = float128_to_int64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 32-bit float to 32-bit uint */
+uint64_t HELPER(clfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ uint32_t ret = float32_to_uint32(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* convert 64-bit float to 32-bit uint */
+uint64_t HELPER(clfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ uint32_t ret = float64_to_uint32(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, 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)
+{
+ int hold = swap_round_mode(env, m3);
+ float128 v2 = make_float128(h, l);
+ /* Not 100% correct. */
+ uint32_t ret = float128_to_int64(v2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* round to integer 32-bit */
+uint64_t HELPER(fieb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float32 ret = float32_round_to_int(f2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* round to integer 64-bit */
+uint64_t HELPER(fidb)(CPUS390XState *env, uint64_t f2, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ float64 ret = float64_round_to_int(f2, &env->fpu_status);
+ set_float_rounding_mode(hold, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* round to integer 128-bit */
+uint64_t HELPER(fixb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint32_t m3)
+{
+ int hold = swap_round_mode(env, m3);
+ 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());
+ return RET128(ret);
+}
+
+/* 32-bit FP multiply and add */
+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());
+ return ret;
+}
+
+/* 64-bit FP multiply and add */
+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());
+ return ret;
+}
+
+/* 32-bit FP multiply and subtract */
+uint64_t HELPER(mseb)(CPUS390XState *env, uint64_t f1,
+ uint64_t f2, uint64_t f3)
+{
+ float32 ret = float32_muladd(f2, f3, f1, float_muladd_negate_c,
+ &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* 64-bit FP multiply and subtract */
+uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1,
+ uint64_t f2, uint64_t f3)
+{
+ float64 ret = float64_muladd(f2, f3, f1, float_muladd_negate_c,
+ &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* test data class 32-bit */
+uint32_t HELPER(tceb)(uint64_t f1, uint64_t m2)
+{
+ float32 v1 = f1;
+ int neg = float32_is_neg(v1);
+ uint32_t cc = 0;
+
+ if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
+ (float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
+ (float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
+ (float32_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
+ cc = 1;
+ } else if (m2 & (1 << (9-neg))) {
+ /* assume normalized number */
+ cc = 1;
+ }
+ /* FIXME: denormalized? */
+ return cc;
+}
+
+/* test data class 64-bit */
+uint32_t HELPER(tcdb)(uint64_t v1, uint64_t m2)
+{
+ int neg = float64_is_neg(v1);
+ uint32_t cc = 0;
+
+ if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
+ (float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
+ (float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
+ (float64_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
+ cc = 1;
+ } else if (m2 & (1 << (9-neg))) {
+ /* assume normalized number */
+ cc = 1;
+ }
+ /* FIXME: denormalized? */
+ return cc;
+}
+
+/* test data class 128-bit */
+uint32_t HELPER(tcxb)(uint64_t ah, uint64_t al, uint64_t m2)
+{
+ float128 v1 = make_float128(ah, al);
+ int neg = float128_is_neg(v1);
+ uint32_t cc = 0;
+
+ if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) ||
+ (float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) ||
+ (float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) ||
+ (float128_is_signaling_nan(v1) && (m2 & (1 << (1-neg))))) {
+ cc = 1;
+ } else if (m2 & (1 << (9-neg))) {
+ /* assume normalized number */
+ cc = 1;
+ }
+ /* FIXME: denormalized? */
+ return cc;
+}
+
+/* square root 32-bit */
+uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
+{
+ float32 ret = float32_sqrt(f2, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* square root 64-bit */
+uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
+{
+ float64 ret = float64_sqrt(f2, &env->fpu_status);
+ handle_exceptions(env, GETPC());
+ return ret;
+}
+
+/* square root 128-bit */
+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());
+ return RET128(ret);
+}
+
+static const int fpc_to_rnd[4] = {
+ float_round_nearest_even,
+ float_round_to_zero,
+ float_round_up,
+ float_round_down
+};
+
+/* set fpc */
+void HELPER(sfpc)(CPUS390XState *env, uint64_t fpc)
+{
+ /* 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 fpc and signal */
+void HELPER(sfas)(CPUS390XState *env, uint64_t val)
+{
+ 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 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);
+ if (s390_exc) {
+ ieee_exception(env, s390_exc | 3, GETPC());
+ }
+}
Code Review / kvmfornfv.git / blobdiff