SiFive U74:
ac3_exponent_min_reuse0_c:       10.0
ac3_exponent_min_reuse0_rvb_b:    8.0
ac3_exponent_min_reuse1_c:     2924.7
ac3_exponent_min_reuse1_rvb_b: 1803.0
ac3_exponent_min_reuse2_c:     5043.0
ac3_exponent_min_reuse2_rvb_b: 2827.5
ac3_exponent_min_reuse3_c:     7028.7
ac3_exponent_min_reuse3_rvb_b: 3872.0
ac3_exponent_min_reuse4_c:     8824.2
ac3_exponent_min_reuse4_rvb_b: 5122.2
ac3_exponent_min_reuse5_c:    10487.5
ac3_exponent_min_reuse5_rvb_b: 6412.2