AT94K05AL ATMEL Corporation, AT94K05AL Datasheet - Page 114
AT94K05AL
Manufacturer Part Number
AT94K05AL
Description
Fpslic Devices Combine 5K Gates of Atmel's Patented AT40K Fpga Architecture, a 20 Mips Avr 8-bit Risc Microprocessor Core, Numerous Fixed Microcontroller Peripheries And up to 36K Bytes of Program And Data SRAM.
Manufacturer
ATMEL Corporation
Datasheet
1.AT94K05AL.pdf
(192 pages)
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Implementations
mul16x16_16
mul16x16_32
114
AT94K Series FPSLIC
Description
Usage
Statistics
Note:
Description
Usage
Statistics
Note:
Multiply of two 16-bit numbers with a 16-bit result.
R17:R16 = R23:R22 • R21:R20
Cycles: 9 + ret
Words: 6 + ret
Register usage: R0, R1 and R16 to R23 (8 registers)
mul16x16_16:
Unsigned multiply of two 16-bit numbers with a 32-bit result.
R19:R18:R17:R16 = R23:R22 • R21:R20
Cycles: 17 + ret
Words: 13 + ret
Register usage: R0 to R2 and R16 to R23 (11 registers)
mul16x16_32:
mul
movw
mul
add
mul
add
ret
clr
mul
movw
mul
movw
mul
add
adc
adc
mul
add
adc
adc
ret
1. Full orthogonality, i.e., any register pair can be used as long as the result and the two oper-
1. Full orthogonality, i.e., any register pair can be used as long as the result and the two oper-
ands do not share register pairs. The routine is non-destructive to the operands.
ands do not share register pairs. The routine is non-destructive to the operands.
r22, r20
r17:r16, r1:r0
r23, r20
r17, r0
r21, r22
r17, r0
r2
r23, r21
r19:r18, r1:r0
r22, r20
r17:r16, r1:r0
r23, r20
r17, r0
r18, r1
r19, r2
r21, r22
r17, r0
r18, r1
r19, r2
; al * bl
; ah * bl
; bh * al
; ah * bh
; al * bl
; ah * bl
; bh * al
(1)
(1)
Rev. 1138F–FPSLI–06/02
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