Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario descargar pdf (Pagina 160)

7 DETAILS OF INSTRUCTIONS

152

EPSON

S1C33 FAMILY C33 PE CORE MANUAL

sbc %rd, %rs

Function

Subtraction with borrow

Standard) rd

← rd - rs - C

Extension 1) Unusable

Extension 2) Unusable

Code

15 12 11 8 7 4 3 0

1 0 1 1 1 1 0 0

r s r d

0xBC__

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

sbc

%rd,%rs ; rd ← rd - rs - C

The content of the rs register and C (carry) flag are subtracted from the rd register.

(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

(1) sbc %r0,%r1 ; r0 = r0 - r1 - C

(2) Subtraction of 64-bit data

data 1 = {r2, r1}, data2 = {r4, r3}, result = {r2, r1}

sub %r1,%r3 ; Subtraction of the low-order word

sbc %r2,%r4 ; Subtraction of the high-order word

1 2 ... 155 156 157 158 159 160 161 162 163 164 165 ... 180 181

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario Pagina 160