Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual do Utilizador Página 136

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7 DETAILS OF INSTRUCTIONS
128
EPSON
S1C33 FAMILY C33 PE CORE MANUAL
mlt.h %rd, %rs
Function
Signed 16-bit × 16-bit multiplication
Standard) alr
rd(15:0) × rs(15:0)
Extension 1) Unusable
Extension 2) Unusable
Code
15 12 11 8 7 4 3 0
1 0 1 0 0 0 1 0
r s r d
0xA2__
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Flag
IE C V Z N
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Mode
Src: Register direct %rs = %r0 to %r15
Dst: Register direct
%rd = %r0 to %r15
CLK
Five cycles
Description
The 16 low-order bits of the rd register and the 16 low-order bits of the rs register are multiplied
together with the signs, and the 32-bit product resulting from the operation is loaded into the ALR
register.
Example
mlt.h %r0,%r1 ; alr r0(15:0) × r1(15:0)
; signed multiplication
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