Floating point transformation insns in MIR.md
| Insn Code | Nops | Description |
|-------------------------|-----:|--------------------------------------------------------|
- | `MIR_F2I` `MIR_D2I` | 2 | transforming floating point value into 64-bit integer |
- | `MIR_FNEG` `MIR_DNEG` | 2 | changing sign of floating point value |
+ | `MIR_F2I`, `MIR_D2I` | 2 | transforming floating point value into 64-bit integer |
+ | `MIR_F2D` | 2 | transforming single to double precision FP value |
+ | `MIR_D2F` | 2 | transforming double to single precision FP value |
+ | `MIR_F2I`, `MIR_D2I` | 2 | transforming floating point value into 64-bit integer |
+ | `MIR_FNEG`, `MIR_DNEG` | 2 | changing sign of floating point value |
| `MIR_FADD`, `MIR_FSUB` | 3 | **single** precision addition and subtraction |
| `MIR_DADD`, `MIR_DSUB` | 3 | **double** precision addition and subtraction |
| `MIR_FMUL`, `MIR_FDIV` | 3 | **single** precision multiplication and divison |
