Compaq ECQD2KCTE manual Index

A

Aborts, forcing, 6–6

ACCESS(x,y) operator, 3–7

Add instructions

add longword, 4–25add quadword, 4–27

add scaled longword, 4–26add scaled quadword, 4–28 See also Floating-point operate

ADDF instruction, 4–110

ADDG instruction, 4–110

ADDL instruction, 4–25

ADDQ instruction, 4–27

Address space match (ASM) virtual cache coherency, 5–4

Address space number (ASN) register

virtual cache coherency, 5–4ADDS instruction, 4–111ADDT instruction, 4–111

AFTER, defined for memory access, 5–12Aligned byte/word memory accesses, A–9

ALIGNED data objects, 1–8

Alignment

atomic byte, 5–3atomic longword, 5–2atomic quadword, 5–2D_floating, 2–6

data considerations, A–4double-width data paths, A–1F_floating, 2–4G_floating, 2–5instruction, A–2longword, 2–2

longword integer, 2–12memory accesses, A–9quadword, 2–3quadword integer, 2–12S_floating, 2–8T_floating, 2–9X_floating, 2–10

Index

Alpha architecture

addressing, 2–1overview, 1–1

porting operating systems to, 1–1programming implications, 5–1registers, 3–1

security, 1–7

See also Conventions

Alpha privileged architecture library. See PALcode AMASK (Architecture mask) instruction, 4–133

AMASK bit assignments, D–3

AND instruction, 4–42

AND operator, 3–7

Architecture extensions,AMASK with, 4–133

ARITH_RIGHT_SHIFT(x,y) operator, 3–7

Arithmetic instructions, 4–24

See also specific arithmetic instructions Arithmetic left shift instruction, 4–41

Arithmetic traps

denormal operand exception disabling, 4–81denormal operand exception enabled for, B–5denormal operand status of, B–5disabling, 4–78

division by zero, 4–77 ,4–81division by zero, disabling, 4–81division by zero, enabling, B–6division by zero, status of, B–5dynamic rounding mode, 4–80enabling, B–5

inexact result, 4–78 ,4–81inexact result, disabling, 4–80inexact result, enabling, B–6inexact result, status of, B–5integer overflow, 4–78 ,4–81integer overflow, disabling, B–5integer overflow, enabling, B–5invalid operation, 4–76 ,4–81invalid operation, disabling, 4–81invalid operation, enabling, B–6invalid operation, status of, B–5overflow, 4–77 ,4–81overflow, disabling, 4–81overflow, enabling, B–6overflow, status of, B–5

Index–1