Zilog Z16F2810 Uživatelský manuál Strana 119

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 216
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 118
UM018809-0611 EXT Instruction
ZNEO
®
CPU Core
User Manual
103
EXT
Definition
Extend
Syntax
EXT dst, src
Operation
dst
src
Description
This instruction loads an 8-bit or 16-bit value from the source register into the destination register
with Signed or Unsigned extension. Byte (8-bit) or Word (16-bit) data size is selected by adding
a .B or .W, suffix, respectively, to the EXT mnemonic. A “U” in the mnemonic suffix selects zero
(unsigned) extension. An “S” in the mnemonic suffix selects signed extension. See LD for
instructions to read memory values with extension.
Flags
Syntax and Opcodes
76543210
C Z S V B CIRQE IRQE
–**–*–
Legend
C = No change.
Z = Set to 1 if the result is zero; otherwise, set to 0.
S = Set to 1 if the result msb is 1; otherwise set to 0.
V = No change.
B = Cleared to 0.
CIRQE = No change.
IRQE = No change.
Instruction, Operands Word 0 Word 1 Word 2
EXT.SW Rd, Rs {43H, Rs, Rd}
EXT.UW Rd, Rs {41H, Rs, Rd}
EXT.SB Rd, Rs {42H, Rs, Rd}
EXT.UB Rd, Rs {40H, Rs, Rd}
Zobrazit stránku 118
1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 215 216

Komentáře k této Příručce

Žádné komentáře