SPRUJ53B April 2024 – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
Load the 32-Bits of a 32-Bit Floating-Point Register with the Immediate
MRa | Floating-point register (MR0 to MR3) |
#32FHex | A 32-bit immediate value that represents an IEEE 32-bit floating-point value. |
This instruction is an alias for the MMOVIZ and MMOVXI instructions. The second operand is translated by the assembler such that the instruction becomes:
MMOVIZ MRa, #16FHiHex
MMOVXI MRa, #16FLoHex
LSW: IIII IIII IIII IIII (opcode of MMOVIZ MRa, #16FHiHex)
MSW: 0111 1000 0100 00aa
LSW: IIII IIII IIII IIII (opcode of MMOVXI MRa, #16FLoHex)
MSW: 0111 1000 1000 00aa
This instruction only accepts a hex value as the immediate operand. To specify the immediate value with a floating-point representation, use the MMOVF32 MRa, #32F instruction.
Load the 32-bits of MRa with the immediate 32-bit hex value represented by #32FHex.
#32FHex is a 32-bit immediate hex value that represents the IEEE 32-bit floating-point value of a floating-point number. The assembler only accepts a hex immediate value. That is, 3.0 can only be represented as #0x40400000 (#3.0 results in an error).
MRa = #32FHex;
This instruction modifies the following flags in the MSTF register:
Flag | TF | ZF | NF | LUF | LVF |
---|---|---|---|---|---|
Modified | No | No | No | No | No |
Depending on #32FHex, this instruction takes one or two cycles. If all of the lower 16-bits of #32FHex are zeros, then the assembler converts MOVI32 to an MMOVIZ instruction. If the lower 16-bits of #32FHex are not zeros, then the assembler converts MOVI32 to MMOVIZ and MMOVXI instructions.
MOVI32 MR1, #0x40400000 ; MR1 = 0x40400000
; Assembler converts this instruction as
; MMOVIZ MR1, #0x4040
MOVI32 MR2, #0x00000000 ; MR2 = 0x00000000
; Assembler converts this instruction as
; MMOVIZ MR2, #0x0
MOVI32 MR3, #0x40004001 ; MR3 = 0x40004001
; Assembler converts this instruction as
; MMOVIZ MR3, #0x4000
; MMOVXI MR3, #0x4001
MOVI32 MR0, #0x00004040 ; MR0 = 0x00004040
; Assembler converts this instruction as
; MMOVIZ MR0, #0x0000
; MMOVXI MR0, #0x4040