Zilog Z16F2810 Instrukcja Użytkownika Pobierz pdf (Strona 113)

UM018809-0611 DEC Instruction

ZNEO

CPU Core

User Manual

Examples

Before:

R3=FFFF_B024H, FFFF_B02CH=702EH

DEC.W 8(R3) ;Object Code: ADF3 4008

After:

FFFF_B02CH=702CH, Flags C, S, Z, V, B=0

Before: FFFF_B034H=2EH

DEC.B B034H:RAM ;Object Code: ADA3 B034

After:

FFFF_B034H = 2DH, Flags C, Z, S, V, B =0

DEC soff14(Rd) {ADFH, Rd} {1xB, soff14}

DEC.W addr16 ADA7H addr16

DEC.W addr32 ADB7H addr[31:16] addr[15:0]

DEC.W (Rd) {AC7H, Rd}

DEC.W soff14(Rd) {ADFH, Rd} {01B, soff14}

DEC.B addr16 ADA3H addr16

DEC.B addr32 ADB3H addr[31:16] addr[15:0]

DEC.B (Rd) {AC3H, Rd}

DEC.B soff14(Rd) {ADFH, Rd} {00B, soff14}

Note:

1. The ZNEO CPU assembler uses a SUB opcode to implement DEC Rd. The one-word instruction

ADD Rd, #-1 can be used if ADD Flags behavior is acceptable.

Instruction, Operands Word 0 Word 1 Word 2

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 215 216

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Zilog Z16F2810 Instrukcja Użytkownika Strona 113