diff options
Diffstat (limited to 'target-s390x/cc_helper.c')
| -rw-r--r-- | target-s390x/cc_helper.c | 550 |
1 files changed, 550 insertions, 0 deletions
diff --git a/target-s390x/cc_helper.c b/target-s390x/cc_helper.c new file mode 100644 index 0000000000..19ef145da9 --- /dev/null +++ b/target-s390x/cc_helper.c @@ -0,0 +1,550 @@ +/* + * 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 "cpu.h" +#include "helper.h" + +/* #define DEBUG_HELPER */ +#ifdef DEBUG_HELPER +#define HELPER_LOG(x...) qemu_log(x) +#else +#define HELPER_LOG(x...) +#endif + +static inline uint32_t cc_calc_ltgt_32(CPUS390XState *env, int32_t src, + int32_t dst) +{ + if (src == dst) { + return 0; + } else if (src < dst) { + return 1; + } else { + return 2; + } +} + +static inline uint32_t cc_calc_ltgt0_32(CPUS390XState *env, int32_t dst) +{ + return cc_calc_ltgt_32(env, dst, 0); +} + +static inline uint32_t cc_calc_ltgt_64(CPUS390XState *env, int64_t src, + int64_t dst) +{ + if (src == dst) { + return 0; + } else if (src < dst) { + return 1; + } else { + return 2; + } +} + +static inline uint32_t cc_calc_ltgt0_64(CPUS390XState *env, int64_t dst) +{ + return cc_calc_ltgt_64(env, dst, 0); +} + +static inline uint32_t cc_calc_ltugtu_32(CPUS390XState *env, uint32_t src, + uint32_t dst) +{ + if (src == dst) { + return 0; + } else if (src < dst) { + return 1; + } else { + return 2; + } +} + +static inline uint32_t cc_calc_ltugtu_64(CPUS390XState *env, uint64_t src, + uint64_t dst) +{ + if (src == dst) { + return 0; + } else if (src < dst) { + return 1; + } else { + return 2; + } +} + +static inline uint32_t cc_calc_tm_32(CPUS390XState *env, uint32_t val, + uint32_t mask) +{ + uint16_t r = val & mask; + + HELPER_LOG("%s: val 0x%x mask 0x%x\n", __func__, val, mask); + if (r == 0 || mask == 0) { + return 0; + } else if (r == mask) { + return 3; + } else { + return 1; + } +} + +/* set condition code for test under mask */ +static inline uint32_t cc_calc_tm_64(CPUS390XState *env, uint64_t val, + uint32_t mask) +{ + uint16_t r = val & mask; + + HELPER_LOG("%s: val 0x%lx mask 0x%x r 0x%x\n", __func__, val, mask, r); + if (r == 0 || mask == 0) { + return 0; + } else if (r == mask) { + return 3; + } else { + while (!(mask & 0x8000)) { + mask <<= 1; + val <<= 1; + } + if (val & 0x8000) { + return 2; + } else { + return 1; + } + } +} + +static inline uint32_t cc_calc_nz(CPUS390XState *env, uint64_t dst) +{ + return !!dst; +} + +static inline uint32_t cc_calc_add_64(CPUS390XState *env, 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 inline uint32_t cc_calc_addu_64(CPUS390XState *env, uint64_t a1, + uint64_t a2, uint64_t ar) +{ + if (ar == 0) { + if (a1) { + return 2; + } else { + return 0; + } + } else { + if (ar < a1 || ar < a2) { + return 3; + } else { + return 1; + } + } +} + +static inline uint32_t cc_calc_sub_64(CPUS390XState *env, 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 inline uint32_t cc_calc_subu_64(CPUS390XState *env, uint64_t a1, + uint64_t a2, uint64_t ar) +{ + if (ar == 0) { + return 2; + } else { + if (a2 > a1) { + return 1; + } else { + return 3; + } + } +} + +static inline uint32_t cc_calc_abs_64(CPUS390XState *env, int64_t dst) +{ + if ((uint64_t)dst == 0x8000000000000000ULL) { + return 3; + } else if (dst) { + return 1; + } else { + return 0; + } +} + +static inline uint32_t cc_calc_nabs_64(CPUS390XState *env, int64_t dst) +{ + return !!dst; +} + +static inline uint32_t cc_calc_comp_64(CPUS390XState *env, 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 inline uint32_t cc_calc_add_32(CPUS390XState *env, 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 inline uint32_t cc_calc_addu_32(CPUS390XState *env, uint32_t a1, + uint32_t a2, uint32_t ar) +{ + if (ar == 0) { + if (a1) { + return 2; + } else { + return 0; + } + } else { + if (ar < a1 || ar < a2) { + return 3; + } else { + return 1; + } + } +} + +static inline uint32_t cc_calc_sub_32(CPUS390XState *env, 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 inline uint32_t cc_calc_subu_32(CPUS390XState *env, uint32_t a1, + uint32_t a2, uint32_t ar) +{ + if (ar == 0) { + return 2; + } else { + if (a2 > a1) { + return 1; + } else { + return 3; + } + } +} + +static inline uint32_t cc_calc_abs_32(CPUS390XState *env, int32_t dst) +{ + if ((uint32_t)dst == 0x80000000UL) { + return 3; + } else if (dst) { + return 1; + } else { + return 0; + } +} + +static inline uint32_t cc_calc_nabs_32(CPUS390XState *env, int32_t dst) +{ + return !!dst; +} + +static inline uint32_t cc_calc_comp_32(CPUS390XState *env, 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 inline uint32_t cc_calc_icm_32(CPUS390XState *env, uint32_t mask, + uint32_t val) +{ + uint32_t cc; + + HELPER_LOG("%s: mask 0x%x val %d\n", __func__, mask, val); + if (mask == 0xf) { + if (!val) { + return 0; + } else if (val & 0x80000000) { + return 1; + } else { + return 2; + } + } + + if (!val || !mask) { + cc = 0; + } else { + while (mask != 1) { + mask >>= 1; + val >>= 8; + } + if (val & 0x80) { + cc = 1; + } else { + cc = 2; + } + } + return cc; +} + +static inline uint32_t cc_calc_slag(CPUS390XState *env, uint64_t src, + uint64_t shift) +{ + uint64_t mask = ((1ULL << shift) - 1ULL) << (64 - shift); + uint64_t match, r; + + /* check if the sign bit stays the same */ + if (src & (1ULL << 63)) { + match = mask; + } else { + match = 0; + } + + if ((src & mask) != match) { + /* overflow */ + return 3; + } + + r = ((src << shift) & ((1ULL << 63) - 1)) | (src & (1ULL << 63)); + + if ((int64_t)r == 0) { + return 0; + } else if ((int64_t)r < 0) { + return 1; + } + + return 2; +} + + +static inline uint32_t do_calc_cc(CPUS390XState *env, uint32_t cc_op, + uint64_t src, uint64_t dst, uint64_t vr) +{ + 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(env, dst); + break; + case CC_OP_LTGT0_64: + r = cc_calc_ltgt0_64(env, dst); + break; + case CC_OP_LTGT_32: + r = cc_calc_ltgt_32(env, src, dst); + break; + case CC_OP_LTGT_64: + r = cc_calc_ltgt_64(env, src, dst); + break; + case CC_OP_LTUGTU_32: + r = cc_calc_ltugtu_32(env, src, dst); + break; + case CC_OP_LTUGTU_64: + r = cc_calc_ltugtu_64(env, src, dst); + break; + case CC_OP_TM_32: + r = cc_calc_tm_32(env, src, dst); + break; + case CC_OP_TM_64: + r = cc_calc_tm_64(env, src, dst); + break; + case CC_OP_NZ: + r = cc_calc_nz(env, dst); + break; + case CC_OP_ADD_64: + r = cc_calc_add_64(env, src, dst, vr); + break; + case CC_OP_ADDU_64: + r = cc_calc_addu_64(env, src, dst, vr); + break; + case CC_OP_SUB_64: + r = cc_calc_sub_64(env, src, dst, vr); + break; + case CC_OP_SUBU_64: + r = cc_calc_subu_64(env, src, dst, vr); + break; + case CC_OP_ABS_64: + r = cc_calc_abs_64(env, dst); + break; + case CC_OP_NABS_64: + r = cc_calc_nabs_64(env, dst); + break; + case CC_OP_COMP_64: + r = cc_calc_comp_64(env, dst); + break; + + case CC_OP_ADD_32: + r = cc_calc_add_32(env, src, dst, vr); + break; + case CC_OP_ADDU_32: + r = cc_calc_addu_32(env, src, dst, vr); + break; + case CC_OP_SUB_32: + r = cc_calc_sub_32(env, src, dst, vr); + break; + case CC_OP_SUBU_32: + r = cc_calc_subu_32(env, src, dst, vr); + break; + case CC_OP_ABS_32: + r = cc_calc_abs_64(env, dst); + break; + case CC_OP_NABS_32: + r = cc_calc_nabs_64(env, dst); + break; + case CC_OP_COMP_32: + r = cc_calc_comp_32(env, dst); + break; + + case CC_OP_ICM: + r = cc_calc_icm_32(env, src, dst); + break; + case CC_OP_SLAG: + r = cc_calc_slag(env, src, dst); + break; + + case CC_OP_LTGT_F32: + r = set_cc_f32(env, src, dst); + break; + case CC_OP_LTGT_F64: + r = set_cc_f64(env, src, 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; + + default: + cpu_abort(env, "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); +} + +/* insert psw mask and condition code into r1 */ +void HELPER(ipm)(CPUS390XState *env, uint32_t cc, uint32_t r1) +{ + uint64_t r = env->regs[r1]; + + r &= 0xffffffff00ffffffULL; + r |= (cc << 28) | ((env->psw.mask >> 40) & 0xf); + env->regs[r1] = r; + HELPER_LOG("%s: cc %d psw.mask 0x%lx r1 0x%lx\n", __func__, + cc, env->psw.mask, r); +} + +#ifndef CONFIG_USER_ONLY +void HELPER(load_psw)(CPUS390XState *env, uint64_t mask, uint64_t addr) +{ + load_psw(env, mask, addr); + cpu_loop_exit(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: + qemu_log("unknown sacf mode: %" PRIx64 "\n", a1); + program_interrupt(env, PGM_SPECIFICATION, 2); + break; + } +} +#endif |