diff options
Diffstat (limited to 'qemu/target-s390x/int_helper.c')
| -rw-r--r-- | qemu/target-s390x/int_helper.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/qemu/target-s390x/int_helper.c b/qemu/target-s390x/int_helper.c deleted file mode 100644 index cc1071eea..000000000 --- a/qemu/target-s390x/int_helper.c +++ /dev/null @@ -1,155 +0,0 @@ -/* - * 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 "qemu/osdep.h" -#include "cpu.h" -#include "qemu/host-utils.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 - -/* 64/32 -> 32 signed division */ -int64_t HELPER(divs32)(CPUS390XState *env, int64_t a, int64_t b64) -{ - int32_t ret, b = b64; - int64_t q; - - if (b == 0) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } - - ret = q = a / b; - env->retxl = a % b; - - /* Catch non-representable quotient. */ - if (ret != q) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } - - return ret; -} - -/* 64/32 -> 32 unsigned division */ -uint64_t HELPER(divu32)(CPUS390XState *env, uint64_t a, uint64_t b64) -{ - uint32_t ret, b = b64; - uint64_t q; - - if (b == 0) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } - - ret = q = a / b; - env->retxl = a % b; - - /* Catch non-representable quotient. */ - if (ret != q) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } - - return ret; -} - -/* 64/64 -> 64 signed division */ -int64_t HELPER(divs64)(CPUS390XState *env, int64_t a, int64_t b) -{ - /* Catch divide by zero, and non-representable quotient (MIN / -1). */ - if (b == 0 || (b == -1 && a == (1ll << 63))) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } - env->retxl = a % b; - return a / b; -} - -/* 128 -> 64/64 unsigned division */ -uint64_t HELPER(divu64)(CPUS390XState *env, uint64_t ah, uint64_t al, - uint64_t b) -{ - uint64_t ret; - /* Signal divide by zero. */ - if (b == 0) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } - if (ah == 0) { - /* 64 -> 64/64 case */ - env->retxl = al % b; - ret = al / b; - } else { - /* ??? Move i386 idivq helper to host-utils. */ -#ifdef CONFIG_INT128 - __uint128_t a = ((__uint128_t)ah << 64) | al; - __uint128_t q = a / b; - env->retxl = a % b; - ret = q; - if (ret != q) { - runtime_exception(env, PGM_FIXPT_DIVIDE, GETPC()); - } -#else - S390CPU *cpu = s390_env_get_cpu(env); - /* 32-bit hosts would need special wrapper functionality - just abort if - we encounter such a case; it's very unlikely anyways. */ - cpu_abort(CPU(cpu), "128 -> 64/64 division not implemented\n"); -#endif - } - return ret; -} - -/* count leading zeros, for find leftmost one */ -uint64_t HELPER(clz)(uint64_t v) -{ - return clz64(v); -} - -uint64_t HELPER(cvd)(int32_t reg) -{ - /* positive 0 */ - uint64_t dec = 0x0c; - int64_t bin = reg; - int shift; - - if (bin < 0) { - bin = -bin; - dec = 0x0d; - } - - for (shift = 4; (shift < 64) && bin; shift += 4) { - dec |= (bin % 10) << shift; - bin /= 10; - } - - return dec; -} - -uint64_t HELPER(popcnt)(uint64_t r2) -{ - uint64_t ret = 0; - int i; - - for (i = 0; i < 64; i += 8) { - uint64_t t = ctpop32((r2 >> i) & 0xff); - ret |= t << i; - } - return ret; -} |