target-s390x: split integer helpers

Move integer helpers to int_helper.c.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 201 insertions, 0 deletions

diff --git a/target-s390x/int_helper.c b/target-s390x/int_helper.c
new file mode 100644
index 0000000000..e2eeb07575
--- /dev/null
+++ b/target-s390x/int_helper.c
@@ -0,0 +1,201 @@
+/*
+ *  S/390 integer 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 "dyngen-exec.h"
+#include "host-utils.h"
+#include "helper.h"
+
+/* #define DEBUG_HELPER */
+#ifdef DEBUG_HELPER
+#define HELPER_LOG(x...) qemu_log(x)
+#else
+#define HELPER_LOG(x...)
+#endif
+
+/* 64/64 -> 128 unsigned multiplication */
+void HELPER(mlg)(uint32_t r1, uint64_t v2)
+{
+#if HOST_LONG_BITS == 64 && defined(__GNUC__)
+    /* assuming 64-bit hosts have __uint128_t */
+    __uint128_t res = (__uint128_t)env->regs[r1 + 1];
+
+    res *= (__uint128_t)v2;
+    env->regs[r1] = (uint64_t)(res >> 64);
+    env->regs[r1 + 1] = (uint64_t)res;
+#else
+    mulu64(&env->regs[r1 + 1], &env->regs[r1], env->regs[r1 + 1], v2);
+#endif
+}
+
+/* 128 -> 64/64 unsigned division */
+void HELPER(dlg)(uint32_t r1, uint64_t v2)
+{
+    uint64_t divisor = v2;
+
+    if (!env->regs[r1]) {
+        /* 64 -> 64/64 case */
+        env->regs[r1] = env->regs[r1 + 1] % divisor;
+        env->regs[r1 + 1] = env->regs[r1 + 1] / divisor;
+        return;
+    } else {
+#if HOST_LONG_BITS == 64 && defined(__GNUC__)
+        /* assuming 64-bit hosts have __uint128_t */
+        __uint128_t dividend = (((__uint128_t)env->regs[r1]) << 64) |
+            (env->regs[r1 + 1]);
+        __uint128_t quotient = dividend / divisor;
+        __uint128_t remainder = dividend % divisor;
+
+        env->regs[r1 + 1] = quotient;
+        env->regs[r1] = remainder;
+#else
+        /* 32-bit hosts would need special wrapper functionality - just abort if
+           we encounter such a case; it's very unlikely anyways. */
+        cpu_abort(env, "128 -> 64/64 division not implemented\n");
+#endif
+    }
+}
+
+/* absolute value 32-bit */
+uint32_t HELPER(abs_i32)(int32_t val)
+{
+    if (val < 0) {
+        return -val;
+    } else {
+        return val;
+    }
+}
+
+/* negative absolute value 32-bit */
+int32_t HELPER(nabs_i32)(int32_t val)
+{
+    if (val < 0) {
+        return val;
+    } else {
+        return -val;
+    }
+}
+
+/* absolute value 64-bit */
+uint64_t HELPER(abs_i64)(int64_t val)
+{
+    HELPER_LOG("%s: val 0x%" PRIx64 "\n", __func__, val);
+
+    if (val < 0) {
+        return -val;
+    } else {
+        return val;
+    }
+}
+
+/* negative absolute value 64-bit */
+int64_t HELPER(nabs_i64)(int64_t val)
+{
+    if (val < 0) {
+        return val;
+    } else {
+        return -val;
+    }
+}
+
+/* add with carry 32-bit unsigned */
+uint32_t HELPER(addc_u32)(uint32_t cc, uint32_t v1, uint32_t v2)
+{
+    uint32_t res;
+
+    res = v1 + v2;
+    if (cc & 2) {
+        res++;
+    }
+
+    return res;
+}
+
+/* subtract unsigned v2 from v1 with borrow */
+uint32_t HELPER(slb)(uint32_t cc, uint32_t r1, uint32_t v2)
+{
+    uint32_t v1 = env->regs[r1];
+    uint32_t res = v1 + (~v2) + (cc >> 1);
+
+    env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) | res;
+    if (cc & 2) {
+        /* borrow */
+        return v1 ? 1 : 0;
+    } else {
+        return v1 ? 3 : 2;
+    }
+}
+
+/* subtract unsigned v2 from v1 with borrow */
+uint32_t HELPER(slbg)(uint32_t cc, uint32_t r1, uint64_t v1, uint64_t v2)
+{
+    uint64_t res = v1 + (~v2) + (cc >> 1);
+
+    env->regs[r1] = res;
+    if (cc & 2) {
+        /* borrow */
+        return v1 ? 1 : 0;
+    } else {
+        return v1 ? 3 : 2;
+    }
+}
+
+/* find leftmost one */
+uint32_t HELPER(flogr)(uint32_t r1, uint64_t v2)
+{
+    uint64_t res = 0;
+    uint64_t ov2 = v2;
+
+    while (!(v2 & 0x8000000000000000ULL) && v2) {
+        v2 <<= 1;
+        res++;
+    }
+
+    if (!v2) {
+        env->regs[r1] = 64;
+        env->regs[r1 + 1] = 0;
+        return 0;
+    } else {
+        env->regs[r1] = res;
+        env->regs[r1 + 1] = ov2 & ~(0x8000000000000000ULL >> res);
+        return 2;
+    }
+}
+
+uint64_t HELPER(cvd)(int32_t bin)
+{
+    /* positive 0 */
+    uint64_t dec = 0x0c;
+    int shift = 4;
+
+    if (bin < 0) {
+        bin = -bin;
+        dec = 0x0d;
+    }
+
+    for (shift = 4; (shift < 64) && bin; shift += 4) {
+        int current_number = bin % 10;
+
+        dec |= (current_number) << shift;
+        bin /= 10;
+    }
+
+    return dec;
+}