MPC8540 datasheet(260/1302 Pages) FREESCALE

260 / 1302 page

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

6-10

Freescale Semiconductor

Core Register Summary

CR0[2]

00010 Zero (EQ)—Set when the result is zero. For SPE APU vector compare and vector test

instructions:

Set to the OR of the result of the compare of the high and low elements.

CR0[3]

00011 Summary overflow (SO). Copy of XER[SO] at the instruction’s completion.

For SPE APU vector compare and vector test instructions:

Set to the AND of the result of the compare of the high and low elements.

CR1[0]

00100 Negative (LT)

For SPE APU vector compare and vector test instructions:

Set if the high-order element of rA is equal to the high-order element of rB; cleared

otherwise.

CR1[1]

00101 Positive (GT)

For SPE APU vector compare and vector test instructions:

Set if the low-order element of rA is equal to the low-order element of rB; cleared

otherwise.

CR1[2]

00110 Zero (EQ)

For SPE APU vector compare and vector test instructions:

Set to the OR of the result of the compare of the high and low elements.

CR1[3]

00111 Summary overflow (SO)

For SPE APU vector compare and vector test instructions:

Set to the AND of the result of the compare of the high and low elements.

CRn[0]

01000

01100

10000

10100

11000

11100

Less than (LT)

For integer compare instructions:

rA < SIMM or rB (signed comparison) or rA < UIMM or rB (unsigned comparison).

For SPE APU vector compare and vector test instructions:

Set if the high-order element of rA is equal to the high-order element of rB; cleared

otherwise.

CRn[1]

01001

01101

10001

10101

11001

11101

Greater than (GT)

For integer compare instructions:

rA > SIMM or rB (signed comparison) or rA > UIMM or rB (unsigned comparison).

For SPE APU vector compare and vector test instructions:

Set if the low-order element of rA is equal to the low-order element of rB; cleared

otherwise.

CRn[2]

01010

01110

10010

10110

11010

11110

Equal (EQ)

For integer compare instructions:

rA = SIMM, UIMM, or rB.

For SPE APU vector compare and vector test instructions:

Set to the OR of the result of the compare of the high and low elements.

CRn[3]

01011

01111

10011

10111

11011

11111

Summary overflow (SO)

For integer compare instructions, this is a copy of XER[SO] at the completion of the

instruction.

For SPE APU vector compare and vector test instructions:

Set to the AND of the result of the compare of the high and low elements.

Table 6-4. BI Operand Settings for CR Fields (continued)

CRn Bits CR Bits

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