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Diffstat (limited to 'target/tilegx/helper.c')
| -rw-r--r-- | target/tilegx/helper.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/target/tilegx/helper.c b/target/tilegx/helper.c new file mode 100644 index 0000000000..b4fba9cc21 --- /dev/null +++ b/target/tilegx/helper.c @@ -0,0 +1,163 @@ +/* + * 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 "qemu/osdep.h" +#include "cpu.h" +#include "exec/exec-all.h" +#include "qemu-common.h" +#include "exec/helper-proto.h" +#include <zlib.h> /* For crc32 */ +#include "syscall_defs.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); +} + +void helper_ext01_ics(CPUTLGState *env) +{ + uint64_t val = env->spregs[TILEGX_SPR_EX_CONTEXT_0_1]; + + switch (val) { + case 0: + case 1: + env->spregs[TILEGX_SPR_CRITICAL_SEC] = val; + break; + default: +#if defined(CONFIG_USER_ONLY) + env->signo = TARGET_SIGILL; + env->sigcode = TARGET_ILL_ILLOPC; + helper_exception(env, TILEGX_EXCP_SIGNAL); +#else + helper_exception(env, TILEGX_EXCP_OPCODE_UNIMPLEMENTED); +#endif + break; + } +} + +uint64_t helper_cntlz(uint64_t arg) +{ + return clz64(arg); +} + +uint64_t helper_cnttz(uint64_t arg) +{ + return ctz64(arg); +} + +uint64_t helper_pcnt(uint64_t arg) +{ + return ctpop64(arg); +} + +uint64_t helper_revbits(uint64_t arg) +{ + return revbit64(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; +} + +uint64_t helper_crc32_8(uint64_t accum, uint64_t input) +{ + uint8_t buf = input; + + /* zlib crc32 converts the accumulator and output to one's complement. */ + return crc32(accum ^ 0xffffffff, &buf, 1) ^ 0xffffffff; +} + +uint64_t helper_crc32_32(uint64_t accum, uint64_t input) +{ + uint8_t buf[4]; + + stl_le_p(buf, input); + + /* zlib crc32 converts the accumulator and output to one's complement. */ + return crc32(accum ^ 0xffffffff, buf, 4) ^ 0xffffffff; +} + +uint64_t helper_cmula(uint64_t srcd, uint64_t srca, uint64_t srcb) +{ + uint32_t reala = (int16_t)srca; + uint32_t imaga = (int16_t)(srca >> 16); + uint32_t realb = (int16_t)srcb; + uint32_t imagb = (int16_t)(srcb >> 16); + uint32_t reald = srcd; + uint32_t imagd = srcd >> 32; + uint32_t realr = reala * realb - imaga * imagb + reald; + uint32_t imagr = reala * imagb + imaga * realb + imagd; + + return deposit64(realr, 32, 32, imagr); +} + +uint64_t helper_cmulaf(uint64_t srcd, uint64_t srca, uint64_t srcb) +{ + uint32_t reala = (int16_t)srca; + uint32_t imaga = (int16_t)(srca >> 16); + uint32_t realb = (int16_t)srcb; + uint32_t imagb = (int16_t)(srcb >> 16); + uint32_t reald = (int16_t)srcd; + uint32_t imagd = (int16_t)(srcd >> 16); + int32_t realr = reala * realb - imaga * imagb; + int32_t imagr = reala * imagb + imaga * realb; + + return deposit32((realr >> 15) + reald, 16, 16, (imagr >> 15) + imagd); +} + +uint64_t helper_cmul2(uint64_t srca, uint64_t srcb, int shift, int round) +{ + uint32_t reala = (int16_t)srca; + uint32_t imaga = (int16_t)(srca >> 16); + uint32_t realb = (int16_t)srcb; + uint32_t imagb = (int16_t)(srcb >> 16); + int32_t realr = reala * realb - imaga * imagb + round; + int32_t imagr = reala * imagb + imaga * realb + round; + + return deposit32(realr >> shift, 16, 16, imagr >> shift); +} |