Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario descargar pdf (Pagina 35)

5 INSTRUCTION SET

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

Extending [%sp+imm6] displacement

The immediate (imm6) in displacement-added register indirect addressing instructions is extended. Be aware

that imm6 is handled differently in single instructions with no ext instructions added.

Displacement-added register indirect addressing instructions, when used singly, automatically calculate a

boundary address according to the data size to be transferred by the instruction.

Example: ld.h %rd,[%sp+imm6]

The address referenced in this example is the “

%sp+imm6∗2” address on a halfword boundary.

For addressing with

ext instructions added, refer to the description below.

Extending to a 19-bit immediate

To extend the immediate to 19-bit quantity, enter one ext instruction directly before the target instruction.

The immediate that is extended to 19-bit quantity has its low-order bits fixed to “0” or “00” according to the

transferred data size. (This applies to other than byte transfers.)

Examples: ext imm13

ld.b

%rd,[%sp+imm6]

ext

imm13

ld.h [%sp+

imm6],%rs

Extended immediate

0 0 0 0 0 00000000

31 19 18

imm13

imm6

5 0

0 0 0 0 0

0 0

00000000

imm13

imm6

[5:1]

0 0 0 0 0 0

0000000

imm13

imm6

[5:2]

Byte transfer

Halfword transfer

Word transfer

The extended data and the sp are added to comprise the source or destination address of transfer.

Extending to a 32-bit immediate

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

ext instructions directly before the target instruction.

The immediate that is extended to 32-bit quantity has its low-order bits fixed to “0” or “00” according to the

transferred data size. (This applies to other than byte transfers.)

Examples: ext imm13 (1)

ext imm13 (2)

ld.b %rd,[%sp+imm6]

ext imm13 (1)

ext imm13 (2)

ld.h [%sp+imm6],%rs

Extended immediate

31 19 18

imm13 (2)

imm6

5 0

0 0

imm13 (2)

imm6

[5:1]

imm13 (2)

imm13 (1)

imm6

[5:2]

Byte transfer

Halfword transfer

Word transfer

The extended data and the sp are added to comprise the source or destination address of transfer.

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 180 181

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