HCS12 datasheet(175/452 Pages) FREESCALE

175 / 452 page

Glossary

S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

175

Operation:

MIN ((D), (M : M + 1))

⇒ D

Description:

Subtracts an unsigned 16-bit value in memory from an unsigned 16-bit

value in double accumulator D to determine which is larger, and leaves the

smaller of the two values in D. The Z status bit is set when the result of the

subtraction is zero (the values are equal), and the C status bit is set when

the subtraction requires a borrow (the value in memory is larger than the

value in the accumulator). When C = 0, the value in D has been replaced by

the value in memory.

The unsigned value in memory is accessed by means of indexed

addressing modes, which allow a great deal of flexibility in specifying the

address of the operand. Auto increment/decrement variations of indexed

addressing facilitate finding the smallest value in a list of values.

EMIND

Place Smaller of Two

Unsigned 16-Bit Values

in Accumulator D

EMIND

CCR Details:

HIN

––––

∆∆∆∆

N: Set if MSB of result is set; cleared otherwise

Set if result is $0000; cleared otherwise

D15

• M15 • R15 + D15 • M15 • R15

Set if a two’s complement overflow resulted from the operation;

cleared otherwise

C: D15

• M15 + M15 • R15 + R15 • D15

Set if the value of the content of memory is larger than the value of

the accumulator; cleared otherwise

Condition codes reflect internal subtraction (R = D – M : M + 1)

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

EMIND oprx0_xysp

EMIND oprx9,xysp

EMIND oprx16,xysp

EMIND [D,xysp]

EMIND [oprx16,xysp]

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

18 1B xb

18 1B xb ff

18 1B xb ee ff

18 1B xb

18 1B xb ee ff

ORPf

ORPO

OfRPP

OfIfRPf

OfIPRPf

ORfP

ORPO

OfRPP

OfIfRfP

OfIPRfP

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