diff options
Diffstat (limited to 'target-alpha/int_helper.c')
| -rw-r--r-- | target-alpha/int_helper.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/target-alpha/int_helper.c b/target-alpha/int_helper.c new file mode 100644 index 0000000000..1d832f0b57 --- /dev/null +++ b/target-alpha/int_helper.c @@ -0,0 +1,319 @@ +/* + * Helpers for integer and multimedia instructions. + * + * Copyright (c) 2007 Jocelyn Mayer + * + * 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" +#include "host-utils.h" + + +uint64_t helper_umulh(uint64_t op1, uint64_t op2) +{ + uint64_t tl, th; + mulu64(&tl, &th, op1, op2); + return th; +} + +uint64_t helper_ctpop(uint64_t arg) +{ + return ctpop64(arg); +} + +uint64_t helper_ctlz(uint64_t arg) +{ + return clz64(arg); +} + +uint64_t helper_cttz(uint64_t arg) +{ + return ctz64(arg); +} + +static inline uint64_t byte_zap(uint64_t op, uint8_t mskb) +{ + uint64_t mask; + + mask = 0; + mask |= ((mskb >> 0) & 1) * 0x00000000000000FFULL; + mask |= ((mskb >> 1) & 1) * 0x000000000000FF00ULL; + mask |= ((mskb >> 2) & 1) * 0x0000000000FF0000ULL; + mask |= ((mskb >> 3) & 1) * 0x00000000FF000000ULL; + mask |= ((mskb >> 4) & 1) * 0x000000FF00000000ULL; + mask |= ((mskb >> 5) & 1) * 0x0000FF0000000000ULL; + mask |= ((mskb >> 6) & 1) * 0x00FF000000000000ULL; + mask |= ((mskb >> 7) & 1) * 0xFF00000000000000ULL; + + return op & ~mask; +} + +uint64_t helper_zap(uint64_t val, uint64_t mask) +{ + return byte_zap(val, mask); +} + +uint64_t helper_zapnot(uint64_t val, uint64_t mask) +{ + return byte_zap(val, ~mask); +} + +uint64_t helper_cmpbge(uint64_t op1, uint64_t op2) +{ + uint8_t opa, opb, res; + int i; + + res = 0; + for (i = 0; i < 8; i++) { + opa = op1 >> (i * 8); + opb = op2 >> (i * 8); + if (opa >= opb) { + res |= 1 << i; + } + } + return res; +} + +uint64_t helper_minub8(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + uint8_t opa, opb, opr; + int i; + + for (i = 0; i < 8; ++i) { + opa = op1 >> (i * 8); + opb = op2 >> (i * 8); + opr = opa < opb ? opa : opb; + res |= (uint64_t)opr << (i * 8); + } + return res; +} + +uint64_t helper_minsb8(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + int8_t opa, opb; + uint8_t opr; + int i; + + for (i = 0; i < 8; ++i) { + opa = op1 >> (i * 8); + opb = op2 >> (i * 8); + opr = opa < opb ? opa : opb; + res |= (uint64_t)opr << (i * 8); + } + return res; +} + +uint64_t helper_minuw4(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + uint16_t opa, opb, opr; + int i; + + for (i = 0; i < 4; ++i) { + opa = op1 >> (i * 16); + opb = op2 >> (i * 16); + opr = opa < opb ? opa : opb; + res |= (uint64_t)opr << (i * 16); + } + return res; +} + +uint64_t helper_minsw4(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + int16_t opa, opb; + uint16_t opr; + int i; + + for (i = 0; i < 4; ++i) { + opa = op1 >> (i * 16); + opb = op2 >> (i * 16); + opr = opa < opb ? opa : opb; + res |= (uint64_t)opr << (i * 16); + } + return res; +} + +uint64_t helper_maxub8(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + uint8_t opa, opb, opr; + int i; + + for (i = 0; i < 8; ++i) { + opa = op1 >> (i * 8); + opb = op2 >> (i * 8); + opr = opa > opb ? opa : opb; + res |= (uint64_t)opr << (i * 8); + } + return res; +} + +uint64_t helper_maxsb8(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + int8_t opa, opb; + uint8_t opr; + int i; + + for (i = 0; i < 8; ++i) { + opa = op1 >> (i * 8); + opb = op2 >> (i * 8); + opr = opa > opb ? opa : opb; + res |= (uint64_t)opr << (i * 8); + } + return res; +} + +uint64_t helper_maxuw4(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + uint16_t opa, opb, opr; + int i; + + for (i = 0; i < 4; ++i) { + opa = op1 >> (i * 16); + opb = op2 >> (i * 16); + opr = opa > opb ? opa : opb; + res |= (uint64_t)opr << (i * 16); + } + return res; +} + +uint64_t helper_maxsw4(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + int16_t opa, opb; + uint16_t opr; + int i; + + for (i = 0; i < 4; ++i) { + opa = op1 >> (i * 16); + opb = op2 >> (i * 16); + opr = opa > opb ? opa : opb; + res |= (uint64_t)opr << (i * 16); + } + return res; +} + +uint64_t helper_perr(uint64_t op1, uint64_t op2) +{ + uint64_t res = 0; + uint8_t opa, opb, opr; + int i; + + for (i = 0; i < 8; ++i) { + opa = op1 >> (i * 8); + opb = op2 >> (i * 8); + if (opa >= opb) { + opr = opa - opb; + } else { + opr = opb - opa; + } + res += opr; + } + return res; +} + +uint64_t helper_pklb(uint64_t op1) +{ + return (op1 & 0xff) | ((op1 >> 24) & 0xff00); +} + +uint64_t helper_pkwb(uint64_t op1) +{ + return ((op1 & 0xff) + | ((op1 >> 8) & 0xff00) + | ((op1 >> 16) & 0xff0000) + | ((op1 >> 24) & 0xff000000)); +} + +uint64_t helper_unpkbl(uint64_t op1) +{ + return (op1 & 0xff) | ((op1 & 0xff00) << 24); +} + +uint64_t helper_unpkbw(uint64_t op1) +{ + return ((op1 & 0xff) + | ((op1 & 0xff00) << 8) + | ((op1 & 0xff0000) << 16) + | ((op1 & 0xff000000) << 24)); +} + +uint64_t helper_addqv(CPUAlphaState *env, uint64_t op1, uint64_t op2) +{ + uint64_t tmp = op1; + op1 += op2; + if (unlikely((tmp ^ op2 ^ (-1ULL)) & (tmp ^ op1) & (1ULL << 63))) { + arith_excp(env, GETPC(), EXC_M_IOV, 0); + } + return op1; +} + +uint64_t helper_addlv(CPUAlphaState *env, uint64_t op1, uint64_t op2) +{ + uint64_t tmp = op1; + op1 = (uint32_t)(op1 + op2); + if (unlikely((tmp ^ op2 ^ (-1UL)) & (tmp ^ op1) & (1UL << 31))) { + arith_excp(env, GETPC(), EXC_M_IOV, 0); + } + return op1; +} + +uint64_t helper_subqv(CPUAlphaState *env, uint64_t op1, uint64_t op2) +{ + uint64_t res; + res = op1 - op2; + if (unlikely((op1 ^ op2) & (res ^ op1) & (1ULL << 63))) { + arith_excp(env, GETPC(), EXC_M_IOV, 0); + } + return res; +} + +uint64_t helper_sublv(CPUAlphaState *env, uint64_t op1, uint64_t op2) +{ + uint32_t res; + res = op1 - op2; + if (unlikely((op1 ^ op2) & (res ^ op1) & (1UL << 31))) { + arith_excp(env, GETPC(), EXC_M_IOV, 0); + } + return res; +} + +uint64_t helper_mullv(CPUAlphaState *env, uint64_t op1, uint64_t op2) +{ + int64_t res = (int64_t)op1 * (int64_t)op2; + + if (unlikely((int32_t)res != res)) { + arith_excp(env, GETPC(), EXC_M_IOV, 0); + } + return (int64_t)((int32_t)res); +} + +uint64_t helper_mulqv(CPUAlphaState *env, uint64_t op1, uint64_t op2) +{ + uint64_t tl, th; + + muls64(&tl, &th, op1, op2); + /* If th != 0 && th != -1, then we had an overflow */ + if (unlikely((th + 1) > 1)) { + arith_excp(env, GETPC(), EXC_M_IOV, 0); + } + return tl; +} |