diff options
Diffstat (limited to 'target-mips/dsp_helper.c')
| -rw-r--r-- | target-mips/dsp_helper.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target-mips/dsp_helper.c b/target-mips/dsp_helper.c index 86c27ec0e8..919ff299f6 100644 --- a/target-mips/dsp_helper.c +++ b/target-mips/dsp_helper.c @@ -3112,6 +3112,61 @@ DM_OPERATE(dmsubu, mul_u32_u32, 0, 0); #undef DM_OPERATE #endif +/** DSP Bit/Manipulation Sub-class insns **/ +target_ulong helper_bitrev(target_ulong rt) +{ + int32_t temp; + uint32_t rd; + int i; + + temp = rt & MIPSDSP_LO; + rd = 0; + for (i = 0; i < 16; i++) { + rd = (rd << 1) | (temp & 1); + temp = temp >> 1; + } + + return (target_ulong)rd; +} + +#define BIT_INSV(name, posfilter, sizefilter, ret_type) \ +target_ulong helper_##name(CPUMIPSState *env, target_ulong rs, \ + target_ulong rt) \ +{ \ + uint32_t pos, size, msb, lsb; \ + target_ulong filter; \ + target_ulong temp, temprs, temprt; \ + target_ulong dspc; \ + \ + dspc = env->active_tc.DSPControl; \ + \ + pos = dspc & posfilter; \ + size = (dspc >> 7) & sizefilter; \ + \ + msb = pos + size - 1; \ + lsb = pos; \ + \ + if (lsb > msb || (msb > TARGET_LONG_BITS)) { \ + return rt; \ + } \ + \ + filter = ((int32_t)0x01 << size) - 1; \ + filter = filter << pos; \ + temprs = rs & filter; \ + temprt = rt & ~filter; \ + temp = temprs | temprt; \ + \ + return (target_long)(ret_type)temp; \ +} + +BIT_INSV(insv, 0x1F, 0x1F, int32_t); +#ifdef TARGET_MIPS64 +BIT_INSV(dinsv, 0x7F, 0x3F, target_long); +#endif + +#undef BIT_INSV + + #undef MIPSDSP_LHI #undef MIPSDSP_LLO #undef MIPSDSP_HI |