Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Uživatelský manuál stáhnout pdf (Strana 34)

5 INSTRUCTION SET

EPSON

S1C33 FAMILY C33 PE CORE MANUAL

Extending to a 32-bit immediate

To extend the immediate to 32-bit quantity, enter two

ext instructions directly before the target instruction.

Example: ext imm13 (1)

ext imm13 (2)

and %rd,sign6

Extended immediate

imm13 (1)

31 19 18

imm13 (2)

sign6

5 0

The MSB (bit 12) in the first ext instruction is the sign, with the immediate extended to become

signed 32-bit data.

5.6.2 Extension of Register Indirect Addressing

Adding displacement to [%rb]

Memory is accessed at the address derived by adding the immediate specified by an ext instruction to the

address that is indirectly referenced by

[%rb].

Adding a 13-bit immediate

Memory is accessed at the address derived by adding the 13-bit immediate specified by

imm13 to the address

specified by the

rb register. During address calculation, imm13 is zero-extended to 32-bit quantity.

Example: ext imm13

ld.b

%rd,[%rb]

0 0 0 0 0 0 0 0

0 0 0 0

0000000

31 13 12

imm13

Immediate

Memory address pointer

Adding a 26-bit immediate

Memory is accessed at the address derived by adding the 26-bit immediate specified by

imm26 to the address

specified by the

rb register. During address calculation, imm26 is zero-extended to 32-bit quantity.

Example: ext imm13 (1)

ext imm13 (2)

ld.uh %rd,[%rb]

000000

31 13 1226 25

imm13 (2)

imm13 (1)

Immediate

Memory address pointer

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 180 181

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