diff options
Diffstat (limited to 'target-tricore/op_helper.c')
| -rw-r--r-- | target-tricore/op_helper.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target-tricore/op_helper.c b/target-tricore/op_helper.c index 94b5d8e12e..a36988aa1b 100644 --- a/target-tricore/op_helper.c +++ b/target-tricore/op_helper.c @@ -20,6 +20,42 @@ #include "exec/helper-proto.h" #include "exec/cpu_ldst.h" +/* Addressing mode helper */ + +static uint16_t reverse16(uint16_t val) +{ + uint8_t high = (uint8_t)(val >> 8); + uint8_t low = (uint8_t)(val & 0xff); + + uint16_t rh, rl; + + rl = (uint16_t)((high * 0x0202020202ULL & 0x010884422010ULL) % 1023); + rh = (uint16_t)((low * 0x0202020202ULL & 0x010884422010ULL) % 1023); + + return (rh << 8) | rl; +} + +uint32_t helper_br_update(uint32_t reg) +{ + uint32_t index = reg & 0xffff; + uint32_t incr = reg >> 16; + uint32_t new_index = reverse16(reverse16(index) + reverse16(incr)); + return reg - index + new_index; +} + +uint32_t helper_circ_update(uint32_t reg, uint32_t off) +{ + uint32_t index = reg & 0xffff; + uint32_t length = reg >> 16; + int32_t new_index = index + off; + if (new_index < 0) { + new_index += length; + } else { + new_index %= length; + } + return reg - index + new_index; +} + #define SSOV(env, ret, arg, len) do { \ int64_t max_pos = INT##len ##_MAX; \ int64_t max_neg = INT##len ##_MIN; \ |