SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
Conditional Swap
MRa | CLA floating-point register (MR0 to MR3) |
MRb | CLA floating-point register (MR0 to MR3) |
CNDF | Optional condition tested based on the MSTF flags |
LSW: 0000 0000 CNDF bbaa
MSW: 0111 1011 0000 0000
Conditional swap of MRa and MRb.
if (CNDF == true) swap MRa and MRb;
CNDF is one of the following conditions:
Encode(1) | CNDF | Description | MSTF Flags Tested |
---|---|---|---|
0000 | NEQ | Not equal to zero | ZF == 0 |
0001 | EQ | Equal to zero | ZF == 1 |
0010 | GT | Greater than zero | ZF == 0 AND NF == 0 |
0011 | GEQ | Greater than or equal to zero | NF == 0 |
0100 | LT | Less than zero | NF == 1 |
0101 | LEQ | Less than or equal to zero | ZF == 1 OR NF == 1 |
1010 | TF | Test flag set | TF == 1 |
1011 | NTF | Test flag not set | TF == 0 |
1100 | LU | Latched underflow | LUF == 1 |
1101 | LV | Latched overflow | LVF == 1 |
1110 | UNC | Unconditional | None |
1111 | UNCF(2) | Unconditional with flag modification | None |
This instruction modifies the following flags in the MSTF register:
Flag | TF | ZF | NF | LUF | LVF |
---|---|---|---|---|---|
Modified | No | No | No | No | No |
No flags affected
This is a single-cycle instruction.
; X is an array of 32-bit floating-point values
; and has length elements. Find the maximum value in
; the array and store the value in Result
;
; Note: MCMPF32 and MSWAPF can be replaced by MMAXF32
;
_Cla1Task1:
MMOVI16 MAR1,#_X ; Start address
MUI16TOF32 MR0, @_len ; Length of the array
MNOP ; delay for MAR1 load
MNOP ; delay for MAR1 load
MMOV32 MR1, *MAR1[2]++ ; MR1 = X0
LOOP
MMOV32 MR2, *MAR1[2]++ ; MR2 = next element
MCMPF32 MR2, MR1 ; Compare MR2 with MR1
MSWAPF MR1, MR2, GT ; MR1 = MAX(MR1, MR2)
MADDF32 MR0, MR0, #-1.0 ; Decrememt the counter
MCMPF32 MR0 #0.0 ; Set/clear flags for MBCNDD
MNOP
MNOP
MNOP
MBCNDD LOOP, NEQ ; Branch if not equal to zero
MMOV32 @_Result, MR1 ; Always executed
MNOP ; Always executed
MNOP ; Always executed
MSTOP ; End of task