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Commit 6e612423 authored by Eric Kooistra's avatar Eric Kooistra
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Added verification for w =4, r = 2, 3 amd for w = 5, r = 3.

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1 merge request!168Add support for round half to even via g_round_even. Not yet fully tested....
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libraries/base/common/tb/vhdl/tb_round.vhd
+ 231
− 57
View file @ 6e612423
......@@ -24,7 +24,9 @@
-- Description:
-- The signal names in this VHDL tb are the same as in the document [1] and
-- in the Python tb [2].
-- The verification uses expected results from [2].
-- The verification uses expected results that were obtained and copied
-- from [2]. The tb_tb_round.vhd tries different settings for w and r.
--
-- References:
-- [1] https://support.astron.nl/confluence/display/L2M/L4+SDPFW+Decision%3A+Number+representation%2C+resizing+and+rounding
-- [2] common_round_tb.py
......@@ -40,8 +42,8 @@ USE work.common_pkg.ALL;
ENTITY tb_round IS
GENERIC (
g_in_dat_w : NATURAL := 4;
g_out_dat_w : NATURAL := 3
g_in_dat_w : NATURAL := 4; -- w = g_in_dat_w, in [2]
g_out_dat_w : NATURAL := 1 -- r = g_in_dat_w - g_out_dat_w, in [2]
);
END tb_round;
......@@ -56,32 +58,79 @@ ARCHITECTURE tb OF tb_round IS
CONSTANT c_round_w : INTEGER := g_in_dat_w - g_out_dat_w;
-- Expected rounded results from [2] for w = g_in_dat_w = 4 and r = c_round_w = 1
CONSTANT c_exp_w4_r1_signed_truncate : t_integer_arr(0 TO 15) := (-4, -4, -3, -3, -2, -2, -1, -1, 0, 0, 1, 1, 2, 2, 3, 3);
CONSTANT c_exp_w4_r1_signed_round_half_away : t_integer_arr(0 TO 15) := (-4, -4, -3, -3, -2, -2, -1, -1, 0, 1, 1, 2, 2, 3, 3, -4);
CONSTANT c_exp_w4_r1_signed_round_half_away_clip : t_integer_arr(0 TO 15) := (-4, -4, -3, -3, -2, -2, -1, -1, 0, 1, 1, 2, 2, 3, 3, 3);
CONSTANT c_exp_w4_r1_signed_round_half_even : t_integer_arr(0 TO 15) := (-4, -4, -3, -2, -2, -2, -1, 0, 0, 0, 1, 2, 2, 2, 3, -4);
CONSTANT c_exp_w4_r1_signed_round_half_even_clip : t_integer_arr(0 TO 15) := (-4, -4, -3, -2, -2, -2, -1, 0, 0, 0, 1, 2, 2, 2, 3, 3);
CONSTANT c_exp_w4_r1_unsigned_truncate : t_natural_arr(0 TO 15) := (0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7);
CONSTANT c_exp_w4_r1_unsigned_round_half_up : t_natural_arr(0 TO 15) := (0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 0);
CONSTANT c_exp_w4_r1_unsigned_round_half_up_clip : t_natural_arr(0 TO 15) := (0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 7);
CONSTANT c_exp_w4_r1_unsigned_round_half_even : t_natural_arr(0 TO 15) := (0, 0, 1, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 6, 7, 0);
CONSTANT c_exp_w4_r1_unsigned_round_half_even_clip : t_natural_arr(0 TO 15) := (0, 0, 1, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 6, 7, 7);
CONSTANT c_exp_w4_r1_sreal_fixed_point : t_real_arr(0 TO 15) := (-4.0, -3.5, -3.0, -2.5, -2.0, -1.5, -1.0, -0.5, 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5);
CONSTANT c_exp_w4_r1_signed_truncate : t_integer_arr(0 TO 15) := (-4, -4, -3, -3, -2, -2, -1, -1, 0, 0, 1, 1, 2, 2, 3, 3);
CONSTANT c_exp_w4_r1_signed_round_half_away : t_integer_arr(0 TO 15) := (-4, -4, -3, -3, -2, -2, -1, -1, 0, 1, 1, 2, 2, 3, 3, -4);
CONSTANT c_exp_w4_r1_signed_round_half_away_clip : t_integer_arr(0 TO 15) := (-4, -4, -3, -3, -2, -2, -1, -1, 0, 1, 1, 2, 2, 3, 3, 3);
CONSTANT c_exp_w4_r1_signed_round_half_even : t_integer_arr(0 TO 15) := (-4, -4, -3, -2, -2, -2, -1, 0, 0, 0, 1, 2, 2, 2, 3, -4);
CONSTANT c_exp_w4_r1_signed_round_half_even_clip : t_integer_arr(0 TO 15) := (-4, -4, -3, -2, -2, -2, -1, 0, 0, 0, 1, 2, 2, 2, 3, 3);
CONSTANT c_exp_w4_r1_unsigned_fixed_point : t_real_arr(0 TO 15) := (0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5);
CONSTANT c_exp_w4_r1_unsigned_truncate : t_natural_arr(0 TO 15) := (0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7);
CONSTANT c_exp_w4_r1_unsigned_round_half_up : t_natural_arr(0 TO 15) := (0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 0);
CONSTANT c_exp_w4_r1_unsigned_round_half_up_clip : t_natural_arr(0 TO 15) := (0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 7);
CONSTANT c_exp_w4_r1_unsigned_round_half_even : t_natural_arr(0 TO 15) := (0, 0, 1, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 6, 7, 0);
CONSTANT c_exp_w4_r1_unsigned_round_half_even_clip : t_natural_arr(0 TO 15) := (0, 0, 1, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 6, 7, 7);
-- Expected rounded results from [2] for w = g_in_dat_w = 4 and r = c_round_w = 2
CONSTANT c_exp_w4_r2_sreal_fixed_point : t_real_arr(0 TO 15) := (-2.0, -1.75, -1.5, -1.25, -1.0, -0.75, -0.5, -0.25, 0.0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75);
CONSTANT c_exp_w4_r2_signed_truncate : t_integer_arr(0 TO 15) := (-2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 0, 1, 1, 1, 1);
CONSTANT c_exp_w4_r2_signed_round_half_away : t_integer_arr(0 TO 15) := (-2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 1, -2, -2);
CONSTANT c_exp_w4_r2_signed_round_half_away_clip : t_integer_arr(0 TO 15) := (-2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 1, 1, 1);
CONSTANT c_exp_w4_r2_signed_round_half_even : t_integer_arr(0 TO 15) := (-2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, -2, -2);
CONSTANT c_exp_w4_r2_signed_round_half_even_clip : t_integer_arr(0 TO 15) := (-2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1);
CONSTANT c_exp_w4_r2_unsigned_fixed_point : t_real_arr(0 TO 15) := (0.0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75);
CONSTANT c_exp_w4_r2_unsigned_truncate : t_natural_arr(0 TO 15) := (0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3);
CONSTANT c_exp_w4_r2_unsigned_round_half_up : t_natural_arr(0 TO 15) := (0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 0, 0);
CONSTANT c_exp_w4_r2_unsigned_round_half_up_clip : t_natural_arr(0 TO 15) := (0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3);
CONSTANT c_exp_w4_r2_unsigned_round_half_even : t_natural_arr(0 TO 15) := (0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 0, 0);
CONSTANT c_exp_w4_r2_unsigned_round_half_even_clip : t_natural_arr(0 TO 15) := (0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3);
-- Expected rounded results from [2] for w = g_in_dat_w = 4 and r = c_round_w = 3
CONSTANT c_exp_w4_r3_sreal_fixed_point : t_real_arr(0 TO 15) := (-1.0, -0.875, -0.75, -0.625, -0.5, -0.375, -0.25, -0.125, 0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875);
CONSTANT c_exp_w4_r3_signed_truncate : t_integer_arr(0 TO 15) := (-1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0);
CONSTANT c_exp_w4_r3_signed_round_half_away : t_integer_arr(0 TO 15) := (-1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1);
CONSTANT c_exp_w4_r3_signed_round_half_away_clip : t_integer_arr(0 TO 15) := (-1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
CONSTANT c_exp_w4_r3_signed_round_half_even : t_integer_arr(0 TO 15) := (-1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1);
CONSTANT c_exp_w4_r3_signed_round_half_even_clip : t_integer_arr(0 TO 15) := (-1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
CONSTANT c_exp_w4_r3_unsigned_fixed_point : t_real_arr(0 TO 15) := (0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875, 1.0, 1.125, 1.25, 1.375, 1.5, 1.625, 1.75, 1.875);
CONSTANT c_exp_w4_r3_unsigned_truncate : t_natural_arr(0 TO 15) := (0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1);
CONSTANT c_exp_w4_r3_unsigned_round_half_up : t_natural_arr(0 TO 15) := (0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0);
CONSTANT c_exp_w4_r3_unsigned_round_half_up_clip : t_natural_arr(0 TO 15) := (0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
CONSTANT c_exp_w4_r3_unsigned_round_half_even : t_natural_arr(0 TO 15) := (0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0);
CONSTANT c_exp_w4_r3_unsigned_round_half_even_clip : t_natural_arr(0 TO 15) := (0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
-- Expected rounded results from [2] for w = g_in_dat_w = 5 and r = c_round_w = 2
CONSTANT c_exp_w5_r2_signed_truncate : t_integer_arr(0 TO 31) := (-4, -4, -4, -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3);
CONSTANT c_exp_w5_r2_signed_round_half_away : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, -4, -4);
CONSTANT c_exp_w5_r2_signed_round_half_away_clip : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3);
CONSTANT c_exp_w5_r2_signed_round_half_even : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -2, -2, -2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, -4, -4);
CONSTANT c_exp_w5_r2_signed_round_half_even_clip : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -2, -2, -2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3);
CONSTANT c_exp_w5_r2_unsigned_truncate : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7);
CONSTANT c_exp_w5_r2_unsigned_truncate_symmetric : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7);
CONSTANT c_exp_w5_r2_unsigned_round_half_up : t_natural_arr(0 TO 31) := (0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 0, 0);
CONSTANT c_exp_w5_r2_unsigned_round_half_up_clip : t_natural_arr(0 TO 31) := (0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7);
CONSTANT c_exp_w5_r2_unsigned_round_half_even : t_natural_arr(0 TO 31) := (0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 0, 0);
CONSTANT c_exp_w5_r2_unsigned_round_half_even_clip : t_natural_arr(0 TO 31) := (0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7);
CONSTANT c_exp_w5_r2_sreal_fixed_point : t_real_arr(0 TO 31) := (-4.0, -3.75, -3.5, -3.25, -3.0, -2.75, -2.5, -2.25, -2.0, -1.75, -1.5, -1.25, -1.0, -0.75, -0.5, -0.25, 0.0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75);
CONSTANT c_exp_w5_r2_signed_truncate : t_integer_arr(0 TO 31) := (-4, -4, -4, -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3);
CONSTANT c_exp_w5_r2_signed_round_half_away : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, -4, -4);
CONSTANT c_exp_w5_r2_signed_round_half_away_clip : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -3, -2, -2, -2, -2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3);
CONSTANT c_exp_w5_r2_signed_round_half_even : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -2, -2, -2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, -4, -4);
CONSTANT c_exp_w5_r2_signed_round_half_even_clip : t_integer_arr(0 TO 31) := (-4, -4, -4, -3, -3, -3, -2, -2, -2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3);
CONSTANT c_exp_w5_r2_unsigned_fixed_point : t_real_arr(0 TO 31) := (0.0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.25, 5.5, 5.75, 6.0, 6.25, 6.5, 6.75, 7.0, 7.25, 7.5, 7.75);
CONSTANT c_exp_w5_r2_unsigned_truncate : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7);
CONSTANT c_exp_w5_r2_unsigned_round_half_up : t_natural_arr(0 TO 31) := (0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 0, 0);
CONSTANT c_exp_w5_r2_unsigned_round_half_up_clip : t_natural_arr(0 TO 31) := (0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7);
CONSTANT c_exp_w5_r2_unsigned_round_half_even : t_natural_arr(0 TO 31) := (0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 0, 0);
CONSTANT c_exp_w5_r2_unsigned_round_half_even_clip : t_natural_arr(0 TO 31) := (0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7);
-- Expected rounded results from [2] for w = g_in_dat_w = 5 and r = c_round_w = 3
CONSTANT c_exp_w5_r3_sreal_fixed_point : t_real_arr(0 TO 31) := (-2.0, -1.875, -1.75, -1.625, -1.5, -1.375, -1.25, -1.125, -1.0, -0.875, -0.75, -0.625, -0.5, -0.375, -0.25, -0.125, 0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875, 1.0, 1.125, 1.25, 1.375, 1.5, 1.625, 1.75, 1.875);
CONSTANT c_exp_w5_r3_signed_truncate : t_integer_arr(0 TO 31) := (-2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1);
CONSTANT c_exp_w5_r3_signed_round_half_away : t_integer_arr(0 TO 31) := (-2, -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, -2, -2, -2, -2);
CONSTANT c_exp_w5_r3_signed_round_half_away_clip : t_integer_arr(0 TO 31) := (-2, -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
CONSTANT c_exp_w5_r3_signed_round_half_even : t_integer_arr(0 TO 31) := (-2, -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, -2, -2, -2, -2);
CONSTANT c_exp_w5_r3_signed_round_half_even_clip : t_integer_arr(0 TO 31) := (-2, -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
CONSTANT c_exp_w5_r3_unsigned_fixed_point : t_real_arr(0 TO 31) := (0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875, 1.0, 1.125, 1.25, 1.375, 1.5, 1.625, 1.75, 1.875, 2.0, 2.125, 2.25, 2.375, 2.5, 2.625, 2.75, 2.875, 3.0, 3.125, 3.25, 3.375, 3.5, 3.625, 3.75, 3.875);
CONSTANT c_exp_w5_r3_unsigned_truncate : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3);
CONSTANT c_exp_w5_r3_unsigned_round_half_up : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0);
CONSTANT c_exp_w5_r3_unsigned_round_half_up_clip : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3);
CONSTANT c_exp_w5_r3_unsigned_round_half_even : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0);
CONSTANT c_exp_w5_r3_unsigned_round_half_even_clip : t_natural_arr(0 TO 31) := (0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3);
SIGNAL tb_end : STD_LOGIC := '0';
SIGNAL clk : STD_LOGIC := '1';
......@@ -91,7 +140,7 @@ ARCHITECTURE tb OF tb_round IS
SIGNAL in_dat : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);
SIGNAL reg_val : STD_LOGIC;
SIGNAL reg_dat : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);
-- Signed output data
-- . view as radix decimal in Wave window
SIGNAL fs_signed_integer : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);
......@@ -101,20 +150,38 @@ ARCHITECTURE tb OF tb_round IS
SIGNAL fs_signed_round_half_even : STD_LOGIC_VECTOR(g_out_dat_w-1 DOWNTO 0);
SIGNAL fs_signed_round_half_even_clip : STD_LOGIC_VECTOR(g_out_dat_w-1 DOWNTO 0);
SIGNAL S_w4_r1 : NATURAL; -- lookup index for signed
SIGNAL S_w4 : NATURAL; -- lookup index for signed
SIGNAL exp_w4_r1_signed_truncate : INTEGER;
SIGNAL exp_w4_r1_signed_round_half_away : INTEGER;
SIGNAL exp_w4_r1_signed_round_half_away_clip : INTEGER;
SIGNAL exp_w4_r1_signed_round_half_even : INTEGER;
SIGNAL exp_w4_r1_signed_round_half_even_clip : INTEGER;
SIGNAL S_w5_r2 : NATURAL; -- lookup index for signed
SIGNAL exp_w4_r2_signed_truncate : INTEGER;
SIGNAL exp_w4_r2_signed_round_half_away : INTEGER;
SIGNAL exp_w4_r2_signed_round_half_away_clip : INTEGER;
SIGNAL exp_w4_r2_signed_round_half_even : INTEGER;
SIGNAL exp_w4_r2_signed_round_half_even_clip : INTEGER;
SIGNAL exp_w4_r3_signed_truncate : INTEGER;
SIGNAL exp_w4_r3_signed_round_half_away : INTEGER;
SIGNAL exp_w4_r3_signed_round_half_away_clip : INTEGER;
SIGNAL exp_w4_r3_signed_round_half_even : INTEGER;
SIGNAL exp_w4_r3_signed_round_half_even_clip : INTEGER;
SIGNAL S_w5 : NATURAL; -- lookup index for signed
SIGNAL exp_w5_r2_signed_truncate : INTEGER;
SIGNAL exp_w5_r2_signed_round_half_away : INTEGER;
SIGNAL exp_w5_r2_signed_round_half_away_clip : INTEGER;
SIGNAL exp_w5_r2_signed_round_half_even : INTEGER;
SIGNAL exp_w5_r2_signed_round_half_even_clip : INTEGER;
SIGNAL exp_w5_r3_signed_truncate : INTEGER;
SIGNAL exp_w5_r3_signed_round_half_away : INTEGER;
SIGNAL exp_w5_r3_signed_round_half_away_clip : INTEGER;
SIGNAL exp_w5_r3_signed_round_half_even : INTEGER;
SIGNAL exp_w5_r3_signed_round_half_even_clip : INTEGER;
-- . show as real in Wave window
SIGNAL fs_sreal_fixed_point : REAL := 0.0;
SIGNAL fs_sreal_truncate : REAL := 0.0;
......@@ -132,20 +199,38 @@ ARCHITECTURE tb OF tb_round IS
SIGNAL fs_unsigned_round_half_even : STD_LOGIC_VECTOR(g_out_dat_w-1 DOWNTO 0);
SIGNAL fs_unsigned_round_half_even_clip : STD_LOGIC_VECTOR(g_out_dat_w-1 DOWNTO 0);
SIGNAL U_w4_r1 : NATURAL; -- lookup index for unsigned
SIGNAL U_w4 : NATURAL; -- lookup index for unsigned
SIGNAL exp_w4_r1_unsigned_truncate : INTEGER;
SIGNAL exp_w4_r1_unsigned_round_half_up : INTEGER;
SIGNAL exp_w4_r1_unsigned_round_half_up_clip : INTEGER;
SIGNAL exp_w4_r1_unsigned_round_half_even : INTEGER;
SIGNAL exp_w4_r1_unsigned_round_half_even_clip : INTEGER;
SIGNAL U_w5_r2 : NATURAL; -- lookup index for unsigned
SIGNAL exp_w4_r2_unsigned_truncate : INTEGER;
SIGNAL exp_w4_r2_unsigned_round_half_up : INTEGER;
SIGNAL exp_w4_r2_unsigned_round_half_up_clip : INTEGER;
SIGNAL exp_w4_r2_unsigned_round_half_even : INTEGER;
SIGNAL exp_w4_r2_unsigned_round_half_even_clip : INTEGER;
SIGNAL exp_w4_r3_unsigned_truncate : INTEGER;
SIGNAL exp_w4_r3_unsigned_round_half_up : INTEGER;
SIGNAL exp_w4_r3_unsigned_round_half_up_clip : INTEGER;
SIGNAL exp_w4_r3_unsigned_round_half_even : INTEGER;
SIGNAL exp_w4_r3_unsigned_round_half_even_clip : INTEGER;
SIGNAL U_w5 : NATURAL; -- lookup index for unsigned
SIGNAL exp_w5_r2_unsigned_truncate : INTEGER;
SIGNAL exp_w5_r2_unsigned_round_half_up : INTEGER;
SIGNAL exp_w5_r2_unsigned_round_half_up_clip : INTEGER;
SIGNAL exp_w5_r2_unsigned_round_half_even : INTEGER;
SIGNAL exp_w5_r2_unsigned_round_half_even_clip : INTEGER;
SIGNAL exp_w5_r3_unsigned_truncate : INTEGER;
SIGNAL exp_w5_r3_unsigned_round_half_up : INTEGER;
SIGNAL exp_w5_r3_unsigned_round_half_up_clip : INTEGER;
SIGNAL exp_w5_r3_unsigned_round_half_even : INTEGER;
SIGNAL exp_w5_r3_unsigned_round_half_even_clip : INTEGER;
-- . show as real in Wave window
SIGNAL fs_ureal_fixed_point : REAL := 0.0;
SIGNAL fs_ureal_truncate : REAL := 0.0;
......@@ -376,31 +461,78 @@ BEGIN
fs_ureal_round_half_even_clip <= TO_UREAL(fs_unsigned_round_half_even_clip, 0);
-- Expected rounded values
S_w4_r1 <= (TO_UINT(in_dat) + 8) MOD 16; -- 2**4 = 16
exp_w4_r1_signed_truncate <= c_exp_w4_r1_signed_truncate(S_w4_r1);
exp_w4_r1_signed_round_half_away <= c_exp_w4_r1_signed_round_half_away(S_w4_r1);
exp_w4_r1_signed_round_half_away_clip <= c_exp_w4_r1_signed_round_half_away_clip(S_w4_r1);
exp_w4_r1_signed_round_half_even <= c_exp_w4_r1_signed_round_half_even(S_w4_r1);
exp_w4_r1_signed_round_half_even_clip <= c_exp_w4_r1_signed_round_half_even_clip(S_w4_r1);
U_w4_r1 <= TO_UINT(in_dat) MOD 16;
exp_w4_r1_unsigned_truncate <= c_exp_w4_r1_unsigned_truncate(U_w4_r1);
exp_w4_r1_unsigned_round_half_up <= c_exp_w4_r1_unsigned_round_half_up(U_w4_r1);
exp_w4_r1_unsigned_round_half_up_clip <= c_exp_w4_r1_unsigned_round_half_up_clip(U_w4_r1);
exp_w4_r1_unsigned_round_half_even <= c_exp_w4_r1_unsigned_round_half_even(U_w4_r1);
exp_w4_r1_unsigned_round_half_even_clip <= c_exp_w4_r1_unsigned_round_half_even_clip(U_w4_r1);
S_w5_r2 <= (TO_UINT(in_dat) + 16) MOD 32; -- 2**5 = 32
exp_w5_r2_signed_truncate <= c_exp_w5_r2_signed_truncate(S_w5_r2);
exp_w5_r2_signed_round_half_away <= c_exp_w5_r2_signed_round_half_away(S_w5_r2);
exp_w5_r2_signed_round_half_away_clip <= c_exp_w5_r2_signed_round_half_away_clip(S_w5_r2);
exp_w5_r2_signed_round_half_even <= c_exp_w5_r2_signed_round_half_even(S_w5_r2);
exp_w5_r2_signed_round_half_even_clip <= c_exp_w5_r2_signed_round_half_even_clip(S_w5_r2);
U_w5_r2 <= TO_UINT(in_dat) MOD 32;
exp_w5_r2_unsigned_truncate <= c_exp_w5_r2_unsigned_truncate(U_w5_r2);
exp_w5_r2_unsigned_round_half_up <= c_exp_w5_r2_unsigned_round_half_up(U_w5_r2);
exp_w5_r2_unsigned_round_half_up_clip <= c_exp_w5_r2_unsigned_round_half_up_clip(U_w5_r2);
exp_w5_r2_unsigned_round_half_even <= c_exp_w5_r2_unsigned_round_half_even(U_w5_r2);
exp_w5_r2_unsigned_round_half_even_clip <= c_exp_w5_r2_unsigned_round_half_even_clip(U_w5_r2);
-- . w = 4
S_w4 <= (TO_UINT(in_dat) + 8) MOD 16; -- 2**4 = 16
U_w4 <= TO_UINT(in_dat) MOD 16;
-- . w = 4, r = 1
exp_w4_r1_signed_truncate <= c_exp_w4_r1_signed_truncate(S_w4);
exp_w4_r1_signed_round_half_away <= c_exp_w4_r1_signed_round_half_away(S_w4);
exp_w4_r1_signed_round_half_away_clip <= c_exp_w4_r1_signed_round_half_away_clip(S_w4);
exp_w4_r1_signed_round_half_even <= c_exp_w4_r1_signed_round_half_even(S_w4);
exp_w4_r1_signed_round_half_even_clip <= c_exp_w4_r1_signed_round_half_even_clip(S_w4);
exp_w4_r1_unsigned_truncate <= c_exp_w4_r1_unsigned_truncate(U_w4);
exp_w4_r1_unsigned_round_half_up <= c_exp_w4_r1_unsigned_round_half_up(U_w4);
exp_w4_r1_unsigned_round_half_up_clip <= c_exp_w4_r1_unsigned_round_half_up_clip(U_w4);
exp_w4_r1_unsigned_round_half_even <= c_exp_w4_r1_unsigned_round_half_even(U_w4);
exp_w4_r1_unsigned_round_half_even_clip <= c_exp_w4_r1_unsigned_round_half_even_clip(U_w4);
-- . w = 4, r = 2
exp_w4_r2_signed_truncate <= c_exp_w4_r2_signed_truncate(S_w4);
exp_w4_r2_signed_round_half_away <= c_exp_w4_r2_signed_round_half_away(S_w4);
exp_w4_r2_signed_round_half_away_clip <= c_exp_w4_r2_signed_round_half_away_clip(S_w4);
exp_w4_r2_signed_round_half_even <= c_exp_w4_r2_signed_round_half_even(S_w4);
exp_w4_r2_signed_round_half_even_clip <= c_exp_w4_r2_signed_round_half_even_clip(S_w4);
exp_w4_r2_unsigned_truncate <= c_exp_w4_r2_unsigned_truncate(U_w4);
exp_w4_r2_unsigned_round_half_up <= c_exp_w4_r2_unsigned_round_half_up(U_w4);
exp_w4_r2_unsigned_round_half_up_clip <= c_exp_w4_r2_unsigned_round_half_up_clip(U_w4);
exp_w4_r2_unsigned_round_half_even <= c_exp_w4_r2_unsigned_round_half_even(U_w4);
exp_w4_r2_unsigned_round_half_even_clip <= c_exp_w4_r2_unsigned_round_half_even_clip(U_w4);
-- . w = 4, r = 3
exp_w4_r3_signed_truncate <= c_exp_w4_r3_signed_truncate(S_w4);
exp_w4_r3_signed_round_half_away <= c_exp_w4_r3_signed_round_half_away(S_w4);
exp_w4_r3_signed_round_half_away_clip <= c_exp_w4_r3_signed_round_half_away_clip(S_w4);
exp_w4_r3_signed_round_half_even <= c_exp_w4_r3_signed_round_half_even(S_w4);
exp_w4_r3_signed_round_half_even_clip <= c_exp_w4_r3_signed_round_half_even_clip(S_w4);
exp_w4_r3_unsigned_truncate <= c_exp_w4_r3_unsigned_truncate(U_w4);
exp_w4_r3_unsigned_round_half_up <= c_exp_w4_r3_unsigned_round_half_up(U_w4);
exp_w4_r3_unsigned_round_half_up_clip <= c_exp_w4_r3_unsigned_round_half_up_clip(U_w4);
exp_w4_r3_unsigned_round_half_even <= c_exp_w4_r3_unsigned_round_half_even(U_w4);
exp_w4_r3_unsigned_round_half_even_clip <= c_exp_w4_r3_unsigned_round_half_even_clip(U_w4);
-- . w = 5
S_w5 <= (TO_UINT(in_dat) + 16) MOD 32; -- 2**5 = 32
U_w5 <= TO_UINT(in_dat) MOD 32;
-- . w = 5, r = 2
exp_w5_r2_signed_truncate <= c_exp_w5_r2_signed_truncate(S_w5);
exp_w5_r2_signed_round_half_away <= c_exp_w5_r2_signed_round_half_away(S_w5);
exp_w5_r2_signed_round_half_away_clip <= c_exp_w5_r2_signed_round_half_away_clip(S_w5);
exp_w5_r2_signed_round_half_even <= c_exp_w5_r2_signed_round_half_even(S_w5);
exp_w5_r2_signed_round_half_even_clip <= c_exp_w5_r2_signed_round_half_even_clip(S_w5);
exp_w5_r2_unsigned_truncate <= c_exp_w5_r2_unsigned_truncate(U_w5);
exp_w5_r2_unsigned_round_half_up <= c_exp_w5_r2_unsigned_round_half_up(U_w5);
exp_w5_r2_unsigned_round_half_up_clip <= c_exp_w5_r2_unsigned_round_half_up_clip(U_w5);
exp_w5_r2_unsigned_round_half_even <= c_exp_w5_r2_unsigned_round_half_even(U_w5);
exp_w5_r2_unsigned_round_half_even_clip <= c_exp_w5_r2_unsigned_round_half_even_clip(U_w5);
-- . w = 5, r = 3
exp_w5_r3_signed_truncate <= c_exp_w5_r3_signed_truncate(S_w5);
exp_w5_r3_signed_round_half_away <= c_exp_w5_r3_signed_round_half_away(S_w5);
exp_w5_r3_signed_round_half_away_clip <= c_exp_w5_r3_signed_round_half_away_clip(S_w5);
exp_w5_r3_signed_round_half_even <= c_exp_w5_r3_signed_round_half_even(S_w5);
exp_w5_r3_signed_round_half_even_clip <= c_exp_w5_r3_signed_round_half_even_clip(S_w5);
exp_w5_r3_unsigned_truncate <= c_exp_w5_r3_unsigned_truncate(U_w5);
exp_w5_r3_unsigned_round_half_up <= c_exp_w5_r3_unsigned_round_half_up(U_w5);
exp_w5_r3_unsigned_round_half_up_clip <= c_exp_w5_r3_unsigned_round_half_up_clip(U_w5);
exp_w5_r3_unsigned_round_half_even <= c_exp_w5_r3_unsigned_round_half_even(U_w5);
exp_w5_r3_unsigned_round_half_even_clip <= c_exp_w5_r3_unsigned_round_half_even_clip(U_w5);
-- Verification
p_verify : PROCESS
......@@ -437,6 +569,34 @@ BEGIN
ASSERT UNSIGNED(fs_unsigned_round_half_even ) = exp_w4_r1_unsigned_round_half_even REPORT "Wrong exp_w4_r1_unsigned_round_half_even" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even_clip) = exp_w4_r1_unsigned_round_half_even_clip REPORT "Wrong exp_w4_r1_unsigned_round_half_even_clip" SEVERITY ERROR;
END IF;
IF g_in_dat_w = 4 AND c_round_w = 2 THEN
-- . signed
ASSERT SIGNED(fs_signed_truncate ) = exp_w4_r2_signed_truncate REPORT "Wrong exp_w4_r2_signed_truncate" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_away ) = exp_w4_r2_signed_round_half_away REPORT "Wrong exp_w4_r2_signed_round_half_away" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_away_clip) = exp_w4_r2_signed_round_half_away_clip REPORT "Wrong exp_w4_r2_signed_round_half_away_clip" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_even ) = exp_w4_r2_signed_round_half_even REPORT "Wrong exp_w4_r2_signed_round_half_even" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_even_clip) = exp_w4_r2_signed_round_half_even_clip REPORT "Wrong exp_w4_r2_signed_round_half_even_clip" SEVERITY ERROR;
-- . unsigned
ASSERT UNSIGNED(fs_unsigned_truncate ) = exp_w4_r2_unsigned_truncate REPORT "Wrong exp_w4_r2_unsigned_truncate" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_up ) = exp_w4_r2_unsigned_round_half_up REPORT "Wrong exp_w4_r2_unsigned_round_half_up" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_up_clip ) = exp_w4_r2_unsigned_round_half_up_clip REPORT "Wrong exp_w4_r2_unsigned_round_half_up_clip" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even ) = exp_w4_r2_unsigned_round_half_even REPORT "Wrong exp_w4_r2_unsigned_round_half_even" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even_clip) = exp_w4_r2_unsigned_round_half_even_clip REPORT "Wrong exp_w4_r2_unsigned_round_half_even_clip" SEVERITY ERROR;
END IF;
IF g_in_dat_w = 4 AND c_round_w = 3 THEN
-- . signed
ASSERT SIGNED(fs_signed_truncate ) = exp_w4_r3_signed_truncate REPORT "Wrong exp_w4_r3_signed_truncate" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_away ) = exp_w4_r3_signed_round_half_away REPORT "Wrong exp_w4_r3_signed_round_half_away" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_away_clip) = exp_w4_r3_signed_round_half_away_clip REPORT "Wrong exp_w4_r3_signed_round_half_away_clip" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_even ) = exp_w4_r3_signed_round_half_even REPORT "Wrong exp_w4_r3_signed_round_half_even" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_even_clip) = exp_w4_r3_signed_round_half_even_clip REPORT "Wrong exp_w4_r3_signed_round_half_even_clip" SEVERITY ERROR;
-- . unsigned
ASSERT UNSIGNED(fs_unsigned_truncate ) = exp_w4_r3_unsigned_truncate REPORT "Wrong exp_w4_r3_unsigned_truncate" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_up ) = exp_w4_r3_unsigned_round_half_up REPORT "Wrong exp_w4_r3_unsigned_round_half_up" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_up_clip ) = exp_w4_r3_unsigned_round_half_up_clip REPORT "Wrong exp_w4_r3_unsigned_round_half_up_clip" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even ) = exp_w4_r3_unsigned_round_half_even REPORT "Wrong exp_w4_r3_unsigned_round_half_even" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even_clip) = exp_w4_r3_unsigned_round_half_even_clip REPORT "Wrong exp_w4_r3_unsigned_round_half_even_clip" SEVERITY ERROR;
END IF;
IF g_in_dat_w = 5 AND c_round_w = 2 THEN
-- . signed
ASSERT SIGNED(fs_signed_truncate ) = exp_w5_r2_signed_truncate REPORT "Wrong exp_w5_r2_signed_truncate" SEVERITY ERROR;
......@@ -451,6 +611,20 @@ BEGIN
ASSERT UNSIGNED(fs_unsigned_round_half_even ) = exp_w5_r2_unsigned_round_half_even REPORT "Wrong exp_w5_r2_unsigned_round_half_even" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even_clip) = exp_w5_r2_unsigned_round_half_even_clip REPORT "Wrong exp_w5_r2_unsigned_round_half_even_clip" SEVERITY ERROR;
END IF;
IF g_in_dat_w = 5 AND c_round_w = 3 THEN
-- . signed
ASSERT SIGNED(fs_signed_truncate ) = exp_w5_r3_signed_truncate REPORT "Wrong exp_w5_r3_signed_truncate" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_away ) = exp_w5_r3_signed_round_half_away REPORT "Wrong exp_w5_r3_signed_round_half_away" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_away_clip) = exp_w5_r3_signed_round_half_away_clip REPORT "Wrong exp_w5_r3_signed_round_half_away_clip" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_even ) = exp_w5_r3_signed_round_half_even REPORT "Wrong exp_w5_r3_signed_round_half_even" SEVERITY ERROR;
ASSERT SIGNED(fs_signed_round_half_even_clip) = exp_w5_r3_signed_round_half_even_clip REPORT "Wrong exp_w5_r3_signed_round_half_even_clip" SEVERITY ERROR;
-- . unsigned
ASSERT UNSIGNED(fs_unsigned_truncate ) = exp_w5_r3_unsigned_truncate REPORT "Wrong exp_w5_r3_unsigned_truncate" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_up ) = exp_w5_r3_unsigned_round_half_up REPORT "Wrong exp_w5_r3_unsigned_round_half_up" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_up_clip ) = exp_w5_r3_unsigned_round_half_up_clip REPORT "Wrong exp_w5_r3_unsigned_round_half_up_clip" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even ) = exp_w5_r3_unsigned_round_half_even REPORT "Wrong exp_w5_r3_unsigned_round_half_even" SEVERITY ERROR;
ASSERT UNSIGNED(fs_unsigned_round_half_even_clip) = exp_w5_r3_unsigned_round_half_even_clip REPORT "Wrong exp_w5_r3_unsigned_round_half_even_clip" SEVERITY ERROR;
END IF;
END IF;
END IF;
END PROCESS;
......
libraries/base/common/tb/vhdl/tb_tb_round.vhd
+ 3
− 0
View file @ 6e612423
......@@ -35,5 +35,8 @@ BEGIN
u_extend : ENTITY work.tb_round GENERIC MAP (5, 6);
u_wires : ENTITY work.tb_round GENERIC MAP (5, 5);
u_round_w4_r1 : ENTITY work.tb_round GENERIC MAP (4, 3); -- -r = 4 - 3 = 1
u_round_w4_r2 : ENTITY work.tb_round GENERIC MAP (4, 2); -- -r = 4 - 2 = 2
u_round_w4_r3 : ENTITY work.tb_round GENERIC MAP (4, 1); -- -r = 4 - 1 = 3
u_round_w5_r2 : ENTITY work.tb_round GENERIC MAP (5, 3); -- -r = 5 - 3 = 2
u_round_w5_r3 : ENTITY work.tb_round GENERIC MAP (5, 2); -- -r = 5 - 2 = 3
END tb;
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