SPRUJ53B April 2024 – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
Convert 32-Bit Floating-Point Value to 16-Bit Integer and Round
MRa | CLA floating-point destination register (MR0 to MR3) |
MRb | CLA floating-point source register (MR0 to MR3) |
LSW: 0000 0000 0000 bbaa
MSW: 0111 1110 0110 0000
Convert the 32-bit floating point value in MRb to a 16-bit integer and round to the nearest even value. The result is stored in MRa.
MRa(15:0) = F32TOI16round(MRb);
MRa(31:16) = sign extension of MRa(15);
This instruction does not affect any flags:
Flag | TF | ZF | NF | LUF | LVF |
---|---|---|---|---|---|
Modified | No | No | No | No | No |
This is a single-cycle instruction.
MMOVIZ MR0, #0x3FD9 ; MR0(31:16) = 0x3FD9
MMOVXI MR0, #0x999A ; MR0(15:0) = 0x999A
; MR0 = 1.7 (0x3FD9999A)
MF32TOI16R MR1, MR0 ; MR1(15:0) = MF32TOI16round (MR0) = 2 (0x0002)
; MR1(31:16) = Sign extension of MR1(15) = 0x0000
MMOVF32 MR2, #-1.7 ; MR2 = -1.7 (0xBFD9999A)
MF32TOI16R MR3, MR2 ; MR3(15:0) = MF32TOI16round (MR2) = -2 (0xFFFE)
; MR3(31:16) = Sign extension of MR2(15) = 0xFFFF