AT94K05AL ATMEL Corporation, AT94K05AL Datasheet - Page 115

• 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

muls16x16_32
mac16x16_32
Rev. 1138F–FPSLI–06/02
Description
Usage
Statistics
Note:
Description
Usage
Statistics
Signed multiply of two 16-bit numbers with a 32-bit result.
R19:R18:R17:R16 = R23:R22 • R21:R20
Cycles: 19 + ret
Words: 15 + ret
Register usage: R0 to R2 and R16 to R23 (11 registers)
muls16x16_32:
Signed multiply-accumulate of two 16-bit numbers with a 32-bit result.
R19:R18:R17:R16 += R23:R22 • R21:R20
Cycles: 23 + ret
Words: 19 + ret
Register usage: R0 to R2 and R16 to R23 (11 registers)
mac16x16_32:
clr
muls
movw
mul
movw
mulsu r23, r20
sbc
add
adc
adc
mulsu r21, r22
sbc
add
adc
adc
ret
clr
muls
add
adc
mul
add
adc
adc
adc
1. The routine is non-destructive to the operands.
r2
r23, r21
r19:r18, r1:r0
r22, r20
r17:r16, r1:r0
r19, r2
r17, r0
r18, r1
r19, r2
r19, r2
r17, r0
r18, r1
r19, r2
r2
r23, r21
r18, r0
r19, r1
r22, r20
r16, r0
r17, r1
r18, r2
r19, r2
; (signed)ah * (signed)bh
; al * bl
; (signed)ah * bl
; Sign extend
; (signed)bh * al
; Sign Extend
; Register Usage Optimized
; (signed)ah * (signed)bh
; al * bl
AT94K Series FPSLIC
(1)
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