diff options
| -rw-r--r-- | target-tilegx/helper.c | 70 | ||||
| -rw-r--r-- | target-tilegx/helper.h | 4 |
2 files changed, 74 insertions, 0 deletions
diff --git a/target-tilegx/helper.c b/target-tilegx/helper.c new file mode 100644 index 0000000..5b37a8c --- /dev/null +++ b/target-tilegx/helper.c @@ -0,0 +1,70 @@ +/* + * QEMU TILE-Gx helpers + * + * Copyright (c) 2015 Chen Gang + * + * 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 2.1 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/lgpl-2.1.html> + */ + +#include "cpu.h" +#include "qemu-common.h" +#include "exec/helper-proto.h" + +void helper_exception(CPUTLGState *env, uint32_t excp) +{ + CPUState *cs = CPU(tilegx_env_get_cpu(env)); + + cs->exception_index = excp; + cpu_loop_exit(cs); +} + +uint64_t helper_cntlz(uint64_t arg) +{ + return clz64(arg); +} + +uint64_t helper_cnttz(uint64_t arg) +{ + return ctz64(arg); +} + +/* + * Functional Description + * uint64_t a = rf[SrcA]; + * uint64_t b = rf[SrcB]; + * uint64_t d = rf[Dest]; + * uint64_t output = 0; + * unsigned int counter; + * for (counter = 0; counter < (WORD_SIZE / BYTE_SIZE); counter++) + * { + * int sel = getByte (b, counter) & 0xf; + * uint8_t byte = (sel < 8) ? getByte (d, sel) : getByte (a, (sel - 8)); + * output = setByte (output, counter, byte); + * } + * rf[Dest] = output; + */ +uint64_t helper_shufflebytes(uint64_t dest, uint64_t srca, uint64_t srcb) +{ + uint64_t vdst = 0; + int count; + + for (count = 0; count < 64; count += 8) { + uint64_t sel = srcb >> count; + uint64_t src = (sel & 8) ? srca : dest; + vdst |= extract64(src, (sel & 7) * 8, 8) << count; + } + + return vdst; +} diff --git a/target-tilegx/helper.h b/target-tilegx/helper.h new file mode 100644 index 0000000..fd5517e --- /dev/null +++ b/target-tilegx/helper.h @@ -0,0 +1,4 @@ +DEF_HELPER_2(exception, noreturn, env, i32) +DEF_HELPER_FLAGS_1(cntlz, TCG_CALL_NO_RWG_SE, i64, i64) +DEF_HELPER_FLAGS_1(cnttz, TCG_CALL_NO_RWG_SE, i64, i64) +DEF_HELPER_FLAGS_3(shufflebytes, TCG_CALL_NO_RWG_SE, i64, i64, i64, i64) |
