at94k05al-25aqi ATMEL Corporation, at94k05al-25aqi Datasheet - Page 115

• Manufacturer Part Number: at94k05al-25aqi
• Description: 5k - 40k Gates Of At40k Fpga With 8-bit Microcontroller, Up To 36k Bytes Of Sram And On-chip Jtag Ice
• 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
add
adc
adc
adc
mul
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)
115