PM0056 datasheet(83/156 Pages) STMICROELECTRONICS

83 / 156 page

DocID15491 Rev 5

83/156

PM0056

The Cortex-M3 instruction set

3.6

Multiply and divide instructions

Table 28 shows the multiply and divide instructions.

3.6.1

MUL, MLA, and MLS

Multiply, multiply with accumulate, and multiply with subtract, using 32-bit operands, and

producing a 32-bit result.

Syntax

MUL{S}{cond} {Rd,} Rn, Rm ; Multiply

MLA{cond} Rd, Rn, Rm, Ra ; Multiply with accumulate

MLS{cond} Rd, Rn, Rm, Ra ; Multiply with subtract

where:

•

‘cond’ is an optional condition code (see Conditional execution on page 57)

•

‘S’ is an optional suffix. If S is specified, the condition code flags are updated on the

result of the operation (see Conditional execution on page 57).

•

‘Rd’ is the destination register. If Rd is omitted, the destination register is Rn

•

‘Rn’, ‘Rm’ are registers holding the values to be multiplied

•

‘Ra’ is a register holding the value to be added to or subtracted from

Table 28. Multiply and divide instructions

Mnemonic

Brief description

See

MLA

Multiply with accumulate, 32-bit result MUL, MLA, and MLS on page 83

MLS

Multiply and subtract, 32-bit result

MUL, MLA, and MLS on page 83

MUL

Multiply, 32-bit result

MUL, MLA, and MLS on page 83

SDIV

Signed divide

SDIV and UDIV on page 86

SMLAL

Signed multiply with accumulate

(32x32+64), 64-bit result

UMULL, UMLAL, SMULL, and SMLAL on

page 85

SMULL

Signed multiply (32x32), 64-bit result

UMULL, UMLAL, SMULL, and SMLAL on

page 85

UDIV

Unsigned divide

SDIV and UDIV on page 86

UMLAL

Unsigned multiply with accumulate

(32x32+64), 64-bit result

UMULL, UMLAL, SMULL, and SMLAL on

page 85

UMULL

Unsigned multiply (32x32), 64-bit

result

UMULL, UMLAL, SMULL, and SMLAL on

page 85

PM0056 bảng dữ liệu(PDF) 83 Page - STMicroelectronics

PM0056 bảng dữ liệu(HTML) 83 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL