Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario descargar pdf (Pagina 83)

7 DETAILS OF INSTRUCTIONS

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

cmp %rd, sign6

Function

Comparison

Standard) rd

- sign6

Extension 1) rd

- sign19

Extension 2) rd

- sign32

Code

15 12 11 10 9 4 3 0

0 1 1 0 1 0

sign6 r d

0x68__

Flag

IE C V Z N

–

↔ ↔ ↔ ↔

Mode

Src: Immediate data (signed)

Dst: Register direct

%rd = %r0 to %r15

CLK

One cycle

Description

(1) Standard

cmp

%rd,sign6 ; rd - sign6

Subtracts the signed 6-bit immediate sign6 from the contents of the rd register, and sets or resets

the flags (C, V, Z and N) according to the results. The

sign6 is sign-extended into 32 bits prior

to the operation. It does not change the contents of the rd register.

(2) Extension 1

ext

imm13 ; = sign19(18:6)

cmp

%rd,sign6 ; rd - sign19, sign6 = sign19(5:0)

Subtracts the signed 19-bit immediate

sign19 from the contents of the rd register, and sets or

resets the flags (C, V, Z and N) according to the results. The

sign19 is sign-extended into 32 bits

prior to the operation. It does not change the contents of the rd register.

(3) Extension 2

ext

imm13 ; = sign32(31:19)

ext

imm13 ; = sign32(18:6)

cmp

%rd,sign6 ; rd - sign32, sign6 = sign32(5:0)

Subtracts the signed 32-bit immediate sign32 extended with the ext instruction from the

contents of the rd register, and sets or resets the flags (C, V, Z and N) according to the results. It

does not change the contents of the rd register.

(4) Delayed instruction

This instruction may be executed as a delayed instruction by writing it directly after a branch

instruction with the “d” bit. In this case, extension of the immediate by the ext instruction

cannot be performed.

Example

(1) cmp %r0,0x3f ; Changes the flags according to the results of

; r0 - 0x3f.

(2)

ext 0x1fff

cmp %r1,0x3f ; Changes the flags according to the results of

; r1 - 0xffffffff.

1 2 ... 78 79 80 81 82 83 84 85 86 87 88 ... 180 181

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario Pagina 83

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