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Texas Instruments TMS320C28x User Manual

Texas Instruments TMS320C28x
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MOVA T,loc16
6-183
MOVA T,loc16 Load T Register and Add Previous Product
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
MOVA, T,loc16 0001 0000 LLLL LLLL X Y N+1
Operands T Upper 16 bits of the multiplicand register (XT)
loc16 Addressing mode (see Chapter 5)
Description Load the T register with the 16-bit content of the location pointed to by the
“loc16” addressing mode. Also, the content of the P register, shifted by the
amount specified by the product shift mode (PM) bits, is added to the content
of the ACC register:
T = [loc16];
ACC = ACC + P << PM;
Flags and
Modes
N After the operation, if bit 31 of the ACC register is 1, the N bit is set; otherwise,
N is cleared.
Z
After the operation, if the value of ACC is zero, the Z bit is set; otherwise Z is
cleared.
C If the addition generates a carry, then C is set; otherwise, C is cleared.
V If an overflow occurs, V is set; otherwise V is not affected
OVC If overflow mode is disabled; and if the operation generates a positive
overflow, the counter is incremented. If overflow mode is disabled; and if the
operation generates a negative overflow, the counter is decremented.
OVM If overflow mode bit is set; the ACC value will saturate maximum positive
(0x7FFFFFFF) or maximum negative (0x80000000) if the operation
overflows.
PM The value in the PM bits sets the shift mode for the output operation from the
product register. If the product shift value is positive (logical left shift
operation), then the low bits are zero filled. If the product shift value is
negative (arithmetic right shift operation), the upper bits are sign extended.
Repeat This instruction is repeatable. If the operation follows a RPT instruction, it will
be executed N+1 times. The state of the Z, N, C and OVC flags reflect the
final result. The V flag will be set if an intermediate overflow occurs.

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Texas Instruments TMS320C28x Specifications

General IconGeneral
BrandTexas Instruments
ModelTMS320C28x
CategoryProcessor
LanguageEnglish

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