Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manuel d'utilisateur télécharger pdf (Page 111)

7 DETAILS OF INSTRUCTIONS

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

103

ld.h %rd, %rs

Function

Signed halfword data transfer

Standard) rd(15:0)

← rs(15:0), rd(31:16) ← rs(15)

Extension 1) Unusable

Extension 2) Unusable

Code

15 12 11 8 7 4 3 0

1 0 1 0 1 0 0 1

r s r d

0xA9__

Flag

IE C V Z N

– – – – –

Mode

Src: Register direct %rs = %r0 to %r15

Dst: Register direct

%rd = %r0 to %r15

CLK

One cycle

Description

(1) Standard

The 16 low-order bits of the rs register are transferred to the rd register after being sign-

extended to 32 bits.

(2) Delayed instruction

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

instruction with the “d” bit.

Example

ld.h %r0,%r1 ; r0 ← r1(15:0) sign-extended

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 180 181

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manuel d'utilisateur Page 111