diff options
Diffstat (limited to 'qemu/target-s390x/cc_helper.c')
-rw-r--r-- | qemu/target-s390x/cc_helper.c | 569 |
1 files changed, 0 insertions, 569 deletions
diff --git a/qemu/target-s390x/cc_helper.c b/qemu/target-s390x/cc_helper.c deleted file mode 100644 index 0d9411bdf..000000000 --- a/qemu/target-s390x/cc_helper.c +++ /dev/null @@ -1,569 +0,0 @@ -/* - * S/390 condition code 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 "exec/helper-proto.h" -#include "qemu/host-utils.h" - -/* #define DEBUG_HELPER */ -#ifdef DEBUG_HELPER -#define HELPER_LOG(x...) qemu_log(x) -#else -#define HELPER_LOG(x...) -#endif - -static uint32_t cc_calc_ltgt_32(int32_t src, int32_t dst) -{ - if (src == dst) { - return 0; - } else if (src < dst) { - return 1; - } else { - return 2; - } -} - -static uint32_t cc_calc_ltgt0_32(int32_t dst) -{ - return cc_calc_ltgt_32(dst, 0); -} - -static uint32_t cc_calc_ltgt_64(int64_t src, int64_t dst) -{ - if (src == dst) { - return 0; - } else if (src < dst) { - return 1; - } else { - return 2; - } -} - -static uint32_t cc_calc_ltgt0_64(int64_t dst) -{ - return cc_calc_ltgt_64(dst, 0); -} - -static uint32_t cc_calc_ltugtu_32(uint32_t src, uint32_t dst) -{ - if (src == dst) { - return 0; - } else if (src < dst) { - return 1; - } else { - return 2; - } -} - -static uint32_t cc_calc_ltugtu_64(uint64_t src, uint64_t dst) -{ - if (src == dst) { - return 0; - } else if (src < dst) { - return 1; - } else { - return 2; - } -} - -static uint32_t cc_calc_tm_32(uint32_t val, uint32_t mask) -{ - uint32_t r = val & mask; - - if (r == 0) { - return 0; - } else if (r == mask) { - return 3; - } else { - return 1; - } -} - -static uint32_t cc_calc_tm_64(uint64_t val, uint64_t mask) -{ - uint64_t r = val & mask; - - if (r == 0) { - return 0; - } else if (r == mask) { - return 3; - } else { - int top = clz64(mask); - if ((int64_t)(val << top) < 0) { - return 2; - } else { - return 1; - } - } -} - -static uint32_t cc_calc_nz(uint64_t dst) -{ - return !!dst; -} - -static uint32_t cc_calc_add_64(int64_t a1, int64_t a2, int64_t ar) -{ - if ((a1 > 0 && a2 > 0 && ar < 0) || (a1 < 0 && a2 < 0 && ar > 0)) { - return 3; /* overflow */ - } else { - if (ar < 0) { - return 1; - } else if (ar > 0) { - return 2; - } else { - return 0; - } - } -} - -static uint32_t cc_calc_addu_64(uint64_t a1, uint64_t a2, uint64_t ar) -{ - return (ar != 0) + 2 * (ar < a1); -} - -static uint32_t cc_calc_addc_64(uint64_t a1, uint64_t a2, uint64_t ar) -{ - /* Recover a2 + carry_in. */ - uint64_t a2c = ar - a1; - /* Check for a2+carry_in overflow, then a1+a2c overflow. */ - int carry_out = (a2c < a2) || (ar < a1); - - return (ar != 0) + 2 * carry_out; -} - -static uint32_t cc_calc_sub_64(int64_t a1, int64_t a2, int64_t ar) -{ - if ((a1 > 0 && a2 < 0 && ar < 0) || (a1 < 0 && a2 > 0 && ar > 0)) { - return 3; /* overflow */ - } else { - if (ar < 0) { - return 1; - } else if (ar > 0) { - return 2; - } else { - return 0; - } - } -} - -static uint32_t cc_calc_subu_64(uint64_t a1, uint64_t a2, uint64_t ar) -{ - if (ar == 0) { - return 2; - } else { - if (a2 > a1) { - return 1; - } else { - return 3; - } - } -} - -static uint32_t cc_calc_subb_64(uint64_t a1, uint64_t a2, uint64_t ar) -{ - int borrow_out; - - if (ar != a1 - a2) { /* difference means borrow-in */ - borrow_out = (a2 >= a1); - } else { - borrow_out = (a2 > a1); - } - - return (ar != 0) + 2 * !borrow_out; -} - -static uint32_t cc_calc_abs_64(int64_t dst) -{ - if ((uint64_t)dst == 0x8000000000000000ULL) { - return 3; - } else if (dst) { - return 2; - } else { - return 0; - } -} - -static uint32_t cc_calc_nabs_64(int64_t dst) -{ - return !!dst; -} - -static uint32_t cc_calc_comp_64(int64_t dst) -{ - if ((uint64_t)dst == 0x8000000000000000ULL) { - return 3; - } else if (dst < 0) { - return 1; - } else if (dst > 0) { - return 2; - } else { - return 0; - } -} - - -static uint32_t cc_calc_add_32(int32_t a1, int32_t a2, int32_t ar) -{ - if ((a1 > 0 && a2 > 0 && ar < 0) || (a1 < 0 && a2 < 0 && ar > 0)) { - return 3; /* overflow */ - } else { - if (ar < 0) { - return 1; - } else if (ar > 0) { - return 2; - } else { - return 0; - } - } -} - -static uint32_t cc_calc_addu_32(uint32_t a1, uint32_t a2, uint32_t ar) -{ - return (ar != 0) + 2 * (ar < a1); -} - -static uint32_t cc_calc_addc_32(uint32_t a1, uint32_t a2, uint32_t ar) -{ - /* Recover a2 + carry_in. */ - uint32_t a2c = ar - a1; - /* Check for a2+carry_in overflow, then a1+a2c overflow. */ - int carry_out = (a2c < a2) || (ar < a1); - - return (ar != 0) + 2 * carry_out; -} - -static uint32_t cc_calc_sub_32(int32_t a1, int32_t a2, int32_t ar) -{ - if ((a1 > 0 && a2 < 0 && ar < 0) || (a1 < 0 && a2 > 0 && ar > 0)) { - return 3; /* overflow */ - } else { - if (ar < 0) { - return 1; - } else if (ar > 0) { - return 2; - } else { - return 0; - } - } -} - -static uint32_t cc_calc_subu_32(uint32_t a1, uint32_t a2, uint32_t ar) -{ - if (ar == 0) { - return 2; - } else { - if (a2 > a1) { - return 1; - } else { - return 3; - } - } -} - -static uint32_t cc_calc_subb_32(uint32_t a1, uint32_t a2, uint32_t ar) -{ - int borrow_out; - - if (ar != a1 - a2) { /* difference means borrow-in */ - borrow_out = (a2 >= a1); - } else { - borrow_out = (a2 > a1); - } - - return (ar != 0) + 2 * !borrow_out; -} - -static uint32_t cc_calc_abs_32(int32_t dst) -{ - if ((uint32_t)dst == 0x80000000UL) { - return 3; - } else if (dst) { - return 2; - } else { - return 0; - } -} - -static uint32_t cc_calc_nabs_32(int32_t dst) -{ - return !!dst; -} - -static uint32_t cc_calc_comp_32(int32_t dst) -{ - if ((uint32_t)dst == 0x80000000UL) { - return 3; - } else if (dst < 0) { - return 1; - } else if (dst > 0) { - return 2; - } else { - return 0; - } -} - -/* calculate condition code for insert character under mask insn */ -static uint32_t cc_calc_icm(uint64_t mask, uint64_t val) -{ - if ((val & mask) == 0) { - return 0; - } else { - int top = clz64(mask); - if ((int64_t)(val << top) < 0) { - return 1; - } else { - return 2; - } - } -} - -static uint32_t cc_calc_sla_32(uint32_t src, int shift) -{ - uint32_t mask = ((1U << shift) - 1U) << (32 - shift); - uint32_t sign = 1U << 31; - uint32_t match; - int32_t r; - - /* Check if the sign bit stays the same. */ - if (src & sign) { - match = mask; - } else { - match = 0; - } - if ((src & mask) != match) { - /* Overflow. */ - return 3; - } - - r = ((src << shift) & ~sign) | (src & sign); - if (r == 0) { - return 0; - } else if (r < 0) { - return 1; - } - return 2; -} - -static uint32_t cc_calc_sla_64(uint64_t src, int shift) -{ - uint64_t mask = ((1ULL << shift) - 1ULL) << (64 - shift); - uint64_t sign = 1ULL << 63; - uint64_t match; - int64_t r; - - /* Check if the sign bit stays the same. */ - if (src & sign) { - match = mask; - } else { - match = 0; - } - if ((src & mask) != match) { - /* Overflow. */ - return 3; - } - - r = ((src << shift) & ~sign) | (src & sign); - if (r == 0) { - return 0; - } else if (r < 0) { - return 1; - } - return 2; -} - -static uint32_t cc_calc_flogr(uint64_t dst) -{ - return dst ? 2 : 0; -} - -static uint32_t do_calc_cc(CPUS390XState *env, uint32_t cc_op, - uint64_t src, uint64_t dst, uint64_t vr) -{ - S390CPU *cpu = s390_env_get_cpu(env); - uint32_t r = 0; - - switch (cc_op) { - case CC_OP_CONST0: - case CC_OP_CONST1: - case CC_OP_CONST2: - case CC_OP_CONST3: - /* cc_op value _is_ cc */ - r = cc_op; - break; - case CC_OP_LTGT0_32: - r = cc_calc_ltgt0_32(dst); - break; - case CC_OP_LTGT0_64: - r = cc_calc_ltgt0_64(dst); - break; - case CC_OP_LTGT_32: - r = cc_calc_ltgt_32(src, dst); - break; - case CC_OP_LTGT_64: - r = cc_calc_ltgt_64(src, dst); - break; - case CC_OP_LTUGTU_32: - r = cc_calc_ltugtu_32(src, dst); - break; - case CC_OP_LTUGTU_64: - r = cc_calc_ltugtu_64(src, dst); - break; - case CC_OP_TM_32: - r = cc_calc_tm_32(src, dst); - break; - case CC_OP_TM_64: - r = cc_calc_tm_64(src, dst); - break; - case CC_OP_NZ: - r = cc_calc_nz(dst); - break; - case CC_OP_ADD_64: - r = cc_calc_add_64(src, dst, vr); - break; - case CC_OP_ADDU_64: - r = cc_calc_addu_64(src, dst, vr); - break; - case CC_OP_ADDC_64: - r = cc_calc_addc_64(src, dst, vr); - break; - case CC_OP_SUB_64: - r = cc_calc_sub_64(src, dst, vr); - break; - case CC_OP_SUBU_64: - r = cc_calc_subu_64(src, dst, vr); - break; - case CC_OP_SUBB_64: - r = cc_calc_subb_64(src, dst, vr); - break; - case CC_OP_ABS_64: - r = cc_calc_abs_64(dst); - break; - case CC_OP_NABS_64: - r = cc_calc_nabs_64(dst); - break; - case CC_OP_COMP_64: - r = cc_calc_comp_64(dst); - break; - - case CC_OP_ADD_32: - r = cc_calc_add_32(src, dst, vr); - break; - case CC_OP_ADDU_32: - r = cc_calc_addu_32(src, dst, vr); - break; - case CC_OP_ADDC_32: - r = cc_calc_addc_32(src, dst, vr); - break; - case CC_OP_SUB_32: - r = cc_calc_sub_32(src, dst, vr); - break; - case CC_OP_SUBU_32: - r = cc_calc_subu_32(src, dst, vr); - break; - case CC_OP_SUBB_32: - r = cc_calc_subb_32(src, dst, vr); - break; - case CC_OP_ABS_32: - r = cc_calc_abs_32(dst); - break; - case CC_OP_NABS_32: - r = cc_calc_nabs_32(dst); - break; - case CC_OP_COMP_32: - r = cc_calc_comp_32(dst); - break; - - case CC_OP_ICM: - r = cc_calc_icm(src, dst); - break; - case CC_OP_SLA_32: - r = cc_calc_sla_32(src, dst); - break; - case CC_OP_SLA_64: - r = cc_calc_sla_64(src, dst); - break; - case CC_OP_FLOGR: - r = cc_calc_flogr(dst); - break; - - case CC_OP_NZ_F32: - r = set_cc_nz_f32(dst); - break; - case CC_OP_NZ_F64: - r = set_cc_nz_f64(dst); - break; - case CC_OP_NZ_F128: - r = set_cc_nz_f128(make_float128(src, dst)); - break; - - default: - cpu_abort(CPU(cpu), "Unknown CC operation: %s\n", cc_name(cc_op)); - } - - HELPER_LOG("%s: %15s 0x%016lx 0x%016lx 0x%016lx = %d\n", __func__, - cc_name(cc_op), src, dst, vr, r); - return r; -} - -uint32_t calc_cc(CPUS390XState *env, uint32_t cc_op, uint64_t src, uint64_t dst, - uint64_t vr) -{ - return do_calc_cc(env, cc_op, src, dst, vr); -} - -uint32_t HELPER(calc_cc)(CPUS390XState *env, uint32_t cc_op, uint64_t src, - uint64_t dst, uint64_t vr) -{ - return do_calc_cc(env, cc_op, src, dst, vr); -} - -#ifndef CONFIG_USER_ONLY -void HELPER(load_psw)(CPUS390XState *env, uint64_t mask, uint64_t addr) -{ - load_psw(env, mask, addr); - cpu_loop_exit(CPU(s390_env_get_cpu(env))); -} - -void HELPER(sacf)(CPUS390XState *env, uint64_t a1) -{ - HELPER_LOG("%s: %16" PRIx64 "\n", __func__, a1); - - switch (a1 & 0xf00) { - case 0x000: - env->psw.mask &= ~PSW_MASK_ASC; - env->psw.mask |= PSW_ASC_PRIMARY; - break; - case 0x100: - env->psw.mask &= ~PSW_MASK_ASC; - env->psw.mask |= PSW_ASC_SECONDARY; - break; - case 0x300: - env->psw.mask &= ~PSW_MASK_ASC; - env->psw.mask |= PSW_ASC_HOME; - break; - default: - HELPER_LOG("unknown sacf mode: %" PRIx64 "\n", a1); - program_interrupt(env, PGM_SPECIFICATION, 2); - break; - } -} -#endif |