Low-Complexity Online Synthesis for AMIDAR Processors

Table 1

Runtime acceleration of benchmark applications.

(a) Round key generation of cryptographic cipher benchmarks
Configuration	Rijndael		Twofish		RC6		Serpent
	Clock ticks	Speedup	Clock ticks	Speedup	Clock ticks	Speedup	Clock ticks	Speedup
Plain software	17760	—	525276	—	61723	—	44276	—
Synthesis enabled	4337	4.09	34112	15.40	3459	17.84	6230	7.11
(b) Single block encryption of cryptographic cipher benchmarks
Configuration	Rijndael		Twofish		RC6		Serpent
	Clock ticks	Speedup	Clock ticks	Speedup	Clock ticks	Speedup	Clock ticks	Speedup
Plain software	21389	—	12864	—	17371	—	34855	—
Synthesis enabled	6167	3.47	8452	1.52	2768	6.28	3273	10.65
(c) Hash algorithms and message digests
Configuration	SHA-1			SHA-256			MD5
	Clock ticks	Speedup		Clock ticks	Speedup		Clock ticks	Speedup
Plain software	23948	—		47471	—		11986	—
Synthesis enabled	4561	5.25		3484	13.63		1485	8.07
(d) Image processing kernels
Configuration	Sobel convolution			Grayscale filter			Contrast filter
	Clock ticks	Speedup		Clock ticks	Speedup		Clock ticks	Speedup
Plain software	21124	—		236	—		608	—
Synthesis enabled	2246	9.41		59	4.00		90	6.76
(e) JPEG-encoding and its application kernels
Configuration	JPEG-encoder		Color space transformation		Forward DCT		Quantization
	Clock ticks	Speedup	Clock ticks	Speedup	Clock ticks	Speedup	Clock ticks	Speedup
Plain software	17368663	—	3436078	—	23054	—	7454	—
Synthesis enabled	4612561	3.77	269702	12.74	2545	9.06	1816	4.10