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test_float_synth.vhdl
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test_float_synth.vhdl
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-------------------------------------------------------------------------------
-- test routine for the post synthesis 32 bit multiply
-------------------------------------------------------------------------------
entity test_float_synth is
generic (
quiet : BOOLEAN := false);
end entity test_float_synth;
use std.textio.all;
library ieee, ieee_proposed;
use ieee.math_real.all;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee_proposed.fixed_float_types.all;
use ieee_proposed.fixed_pkg.all;
use ieee_proposed.float_pkg.all;
--library modelsim_lib;
--use modelsim_lib.util.all;
architecture testbench of test_float_synth is
subtype fp16 is float (6 downto -9); -- 16 bit
function reverse (
inpvec : STD_LOGIC_VECTOR (0 to 31))
return float32 is
variable result : float32;
begin
for i in 0 to 31 loop
result (i-23) := inpvec(i);
end loop; -- i
return result;
end function reverse;
-- purpose: converts an float32 into a std_logic_vector
-- function to_slv (
-- input : float32) -- float32 input
-- return std_logic_vector is
-- variable result : std_logic_vector (31 downto 0); -- result
-- begin -- function to_slv
-- floop: for i in float32'range loop
-- result (i + fp_fraction_width) := input (i);
-- end loop floop;
-- return result;
-- end function to_slv;
-- purpose: converts a std_logic_vector to an float32
function to_float32x (
signal input : STD_LOGIC_VECTOR (31 downto 0))
return float32 is
variable result : float32;
begin -- function to_float32x
return to_float (input, float32'high, -float32'low);
end function to_float32x;
procedure report_error (
constant errmes : STRING; -- error message
actual : in float32; -- data from algorithm
constant expected : float32) is -- reference data
begin -- function report_error
assert actual = expected
report errmes & " miscompare" & CR &
"Actual " & to_string (actual) & " ("
& REAL'image(to_real(actual))& ") /= " & CR &
"Expected " & to_string (expected) & " ("
& REAL'image(to_real(expected))& ")"
severity error;
return;
end procedure report_error;
procedure report_error16 (
constant errmes : STRING; -- error message
actual : in fp16; -- data from algorithm
constant expected : fp16) is -- reference data
begin -- function report_error
assert actual = expected
report errmes & " miscompare" & CR &
"Actual " & to_string (actual) & " ("
& REAL'image(to_real(actual))& ") /= " & CR &
"Expected " & to_string (expected) & " ("
& REAL'image(to_real(expected))& ")"
severity error;
return;
end procedure report_error16;
component float_synth is
port (
in1, in2 : in STD_LOGIC_VECTOR(31 downto 0); -- inputs
out1 : out STD_LOGIC_VECTOR(31 downto 0); -- output
cmd : in STD_LOGIC_VECTOR (3 downto 0);
clk, rst_n : in STD_ULOGIC); -- clk and reset
end component float_synth;
for all : float_synth
use entity work.float_synth(rtl);
constant clock_period : TIME := 500 ns; -- clock period
signal stop_clock : BOOLEAN := false; -- stop the clock
signal out1real : REAL; -- real version
signal in1, in2 : float32; -- inputs
signal out1 : float32; -- output
constant zero0 : float32 := (others => '0'); -- zero
signal cmd : STD_LOGIC_VECTOR (3 downto 0); -- command
signal clk, rst_n : STD_ULOGIC; -- clk and reset
signal in1slv, in2slv, out1slv : STD_LOGIC_VECTOR(31 downto 0);
signal indelay : float32; -- spied signal
begin -- architecture testbench
out1real <= to_real (out1);
in1slv <= to_slv(in1);
in2slv <= to_slv(in2);
out1 <= to_float32x(out1slv);
DUT : float_synth
port map (
in1 => in1slv, -- [in float32] inputs
in2 => in2slv, -- [in float32] inputs
out1 => out1slv, -- [out float32] output
cmd => cmd,
clk => clk, -- [in std_ulogic] clk and reset
rst_n => rst_n); -- [in std_ulogic] clk and reset
-- spy_process : process
-- begin
-- signal_force ("/DUT/in2reg3", "00000000000000000000000000000000",
-- 500 ns, freeze, 5000 ns, 1);
-- wait;
-- end process spy_process;
-- purpose: clock driver
-- type : combinational
-- inputs :
-- outputs:
clkprc : process is
begin -- process clkprc
if (not stop_clock) then
clk <= '0';
wait for clock_period/2.0;
clk <= '1';
wait for clock_period/2.0;
else
wait;
end if;
end process clkprc;
-- purpose: reset driver
-- type : combinational
-- inputs :
-- outputs:
reset_proc : process is
begin -- process reset_proc
rst_n <= '0';
wait for clock_period * 2.0;
rst_n <= '1';
wait;
end process reset_proc;
-- purpose: main test loop
-- type : combinational
-- inputs :
-- outputs:
tester : process is
begin -- process tester
cmd <= "0110"; -- 16 bit to float32 mode
in1 <= "10000000000000000000001000101111"; -- 4.33 ufixed
in2 <= "00000000000000000000000000000100"; -- 4
floop1: for i in 1 to 100 loop
wait for clock_period;
end loop floop1;
cmd <= "0110"; -- 16 bit to float32 mode
in1 <= "10000000000000000000001000101011"; -- 4.33 ufixed
in2 <= "00000000000000000000000000000100"; -- 4
floop2: for i in 1 to 100 loop
wait for clock_period;
end loop floop2;
cmd <= "0010";
in1 <= reverse("00000000000000000000101100000010"); -- 6.5
in2 <= reverse("00000000000000000001010001000010"); -- 42
wait for clock_period;
in1 <= reverse("00000000000000000001010001000010"); -- 42
in2 <= reverse("00000000000000000000101100000010"); -- 6.5
wait for clock_period;
in1 <= reverse("00000000000000000000101100000010"); -- 6.5
in2 <= reverse("00000000000000000000101100000010"); -- 6.5
wait for clock_period;
in1 <= reverse("00000000000000000001010001000010"); -- 42
in2 <= "01000000000000000000000000000000"; -- 2
wait for clock_period;
in1 <= "00111110101010101010101010101011"; -- 1/3
in2 <= "01000000000000000000000000000000"; -- 2
wait for clock_period;
in1 <= reverse("00000000000000000001010001000010"); -- 42
in2 <= reverse("00000000000000000000101100000011"); -- -6.5
wait for clock_period;
in1 <= reverse("10000000000000000000000000000000"); -- 2**-149
in2 <= "11000000000000000000000000000000"; -- -2.0
wait for clock_period;
in1 <= reverse("00000000000000000000001000000000"); -- 2**-127
in2 <= "00111110100000000000000000000000"; -- 0.25
wait for clock_period;
in1 <= reverse("00000000000000000001010001000010"); -- 42
in2 <= reverse("00000000000000000000101100000010"); -- 6.5
wait for clock_period;
cmd <= "0001"; -- subtract mode
in2 <= "01001011111001110011000110011011"; -- 30303030
in1 <= "01001011111001110011000110011100"; -- 30303033
wait for clock_period;
in1 <= reverse("00000000000000000000101100000010"); -- 6.5
in2 <= "01000000100000000000000000000000"; -- 4
wait for clock_period;
in2 <= reverse("00000000000000000000101100000010"); -- 6.5
in1 <= "01000000100000000000000000000000"; -- 4
wait for clock_period;
in1 <= "01000000100010101010101010101011"; -- 4.333333
in2 <= "00111110101010101010101010101011"; -- 1/3
wait for clock_period;
cmd <= "0000"; -- add mode
in1 <= "00111110101010101010101010101011"; -- 1/3
in2 <= "01000000000000000000000000000000"; -- 2
wait for clock_period;
in2 <= "00111110101010101010101010101011"; -- 1/3
in1 <= "01000000000000000000000000000000"; -- 2
wait for clock_period;
in1 <= "00000000100000000000000000000001"; -- 2**-126
in2 <= "01000000100000000000000000000001"; -- 4+
wait for clock_period;
cmd <= "0011"; -- divide mode
in1 <= "00111111100000000000000000000000"; -- 1.0
in2 <= "01000000010000000000000000000000"; -- 3.0
wait for clock_period;
in1 <= "01001100000011001011110001001111"; -- 36892987
in2 <= "00000000010000000000000000000000"; -- 2**-127
wait for clock_period;
in1 <= "10111110101010101010101010101011"; -- -1/3
in2 <= "01000000000000000000000000000000"; -- 2
wait for clock_period;
cmd <= "0100"; -- 32 to 16 conversion mode
in1 <= "00111111100000000000000000000000"; -- 1.0
in2 <= (others => '0');
wait for clock_period;
in1 <= "10111110101010101010101010101011"; -- -1/3, no round
wait for clock_period;
in1 <= "10111110101010101010101010101011"; -- -1/3
in2 <= "00000000000000000000000000000001"; -- opcode 1
wait for clock_period;
cmd <= "0101"; -- conversion mode
in1 <= "00111111100000000000000000000000"; -- 1.0
in2 <= "01000000000000000000000000000000"; -- opcode zero
wait for clock_period;
in1 <= "01000010001010000000000000000000"; -- 42.0
in2 <= "00000000000000000000000000000001"; -- opcode 1
wait for clock_period;
in1 <= "10111111100000000000000000000000"; -- -1.0
in2 <= "00000000000000000000000000000010"; -- 2
wait for clock_period;
in1 <= "00111111100000000000000000000000"; -- 1.0
in2 <= "00000000000000000000000000000011"; -- 3
wait for clock_period;
in1 <= "01000000100010101010101010101011"; -- 4.333333
in2 <= "00000000000000000000000000000100"; -- 4
wait for clock_period;
in1 <= "00111111100000000000000000000000"; -- 1.0
in2 <= "00000000000000000000000000000101"; -- 5
wait for clock_period;
in1 <= "11000000100010101010101010101011"; -- -4.333333
in2 <= "00000000000000000000000000000110"; -- 6 to_sfixed
wait for clock_period;
in1 <= "00111111100000000000000000000000"; -- 1.0
in2 <= "00000000000000000000000000000111"; -- 7 to_sfixed
wait for clock_period;
cmd <= "0110"; -- 16 bit to float32 mode
in1 <= "00000000000000000000000000000011"; -- 3
in2 <= "01000000000000000000000000000000"; -- mode 0
wait for clock_period;
in1 <= "00000000000000000000000000000100"; -- 4
in2 <= "01000000000000000000000000000001"; -- 1
wait for clock_period;
in1 <= "00000000000000001111111111111110"; -- -2
in2 <= "01000000000000000000000000000010"; -- 2 to_float(signed)
wait for clock_period;
in1 <= "00000000000000000000000000000100"; -- 4
in2 <= "01000000000000000000000000000011"; -- mode 3
wait for clock_period;
in1 <= "10000000000000000000001000101011"; -- 4.33 ufixed
in2 <= "00000000000000000000000000000100"; -- 4
wait for clock_period;
in1 <= "10100000000000000000000010000000"; -- 1.0 ufixed
in2 <= "00000000000000000000000000000101"; -- 5
wait for clock_period;
in1 <= "11000000000000001111110111010101"; -- -4.333 sfixed
in2 <= "00000000000000000000000000000110"; -- 6
wait for clock_period;
in1 <= "10100000000000000000000010000000"; -- 1.0 sfixed
in2 <= "00000000000000000000000000000111"; -- 7
wait for clock_period;
cmd <= "0111"; -- Mod
in1 <= "00000000000000000000000000000011"; --
in2 <= "00000000000000000000000000000011"; --
wait for clock_period;
in1 <= "00000010001100101111000100111011"; -- 36892987
in2 <= "00000010001100101111000100111011"; -- 36892987
wait for clock_period;
in1 <= "11000000100010101010101010101011"; -- -4.333333
in2 <= "01000000100000000000000000000000"; -- 4
wait for clock_period;
cmd <= "1000"; -- rem
in1 <= "00000000000000000000000000000011"; --
in2 <= "00000000000000000000000000000011"; --
wait for clock_period;
in1 <= "00000010001100101111000100111011"; -- 36892987
in2 <= "00000010001100101111000100111011"; -- 36892987
wait for clock_period;
in1 <= "11000000100010101010101010101011"; -- -4.333333
in2 <= "01000000100000000000000000000000"; -- 4
wait for clock_period;
cmd <= "1001"; -- constants conversion
in2 <= "11000000000000000000000000000000"; -- command 0
wait for clock_period;
in2 <= "11000000000000000000000000000001"; -- command 1
wait for clock_period;
in2 <= "11000000000000000000000000000010"; -- command 2
wait for clock_period;
in2 <= "11000000000000000000000000000011"; -- command 3
wait for clock_period;
in2 <= "11000000000000000000000000000100"; -- command 4
wait for clock_period;
in2 <= "11000000000000000000000000000101"; -- command 5
wait for clock_period;
in2 <= "11000000000000000000000000000110"; -- command 6
wait for clock_period;
in2 <= "11000000000000000000000000000111"; -- command 7
wait for clock_period;
cmd <= "1010"; -- conversions
in1 <= to_float (1, in1);
in2 <= "11000000000000000000000000000000"; -- command 0
wait for clock_period;
in1 <= to_float (-2, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000001"; -- command 1
wait for clock_period;
in1 <= to_float (1, in1);
wait for clock_period;
in2 <= "00010000000000000000000000000010"; -- command 2 scalb
in1 <= to_float (1, in1);
wait for clock_period;
in2 <= "11110000000000000000000000000010"; -- command 2 scalb
in1 <= to_float (1, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000011"; -- command 3 logb
in1 <= to_float (1, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000011"; -- command 3 logb
in1 <= to_float (0.25, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000100"; -- 4 nextafter
in1 <= to_float (1, in1);
wait for clock_period;
in1 <= to_float (4, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000101"; -- 5 nextafter
in1 <= to_float (1, in1);
wait for clock_period;
in1 <= to_float (-4, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000110"; -- 6 nextafter
in1 <= to_float (1, in1);
wait for clock_period;
in1 <= to_float (4, in1);
wait for clock_period;
in2 <= "11000000000000000000000000000111"; -- 7 nextafter
in1 <= to_float (1, in1);
wait for clock_period;
in1 <= to_float (-4, in1);
wait for clock_period;
cmd <= "1011"; -- copy sign
in1 <= to_float (2, in1);
in2 <= to_float (2, in1);
wait for clock_period;
in1 <= to_float (-3, in1);
in2 <= to_float (3, in1);
wait for clock_period;
in1 <= to_float (4, in1);
in2 <= to_float (-4, in1);
wait for clock_period;
in1 <= to_float (-5, in1);
in2 <= to_float (-5, in1);
wait for clock_period;
cmd <= "1100"; -- compare test
in1 <= to_float (15, in1);
in2 <= to_float (15, in1);
wait for clock_period;
in1 <= to_float (15.5, in1);
in2 <= to_float (-2, in1);
wait for clock_period;
in1 <= to_float (-2, in1);
in2 <= to_float (2, in1);
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= to_float (-2, in1);
wait for clock_period;
in1 <= "01111111100000000000000000000001"; -- NAN
in2 <= to_float (-2, in1);
wait for clock_period;
cmd <= "1101"; -- boolean test
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000000"; -- command 0 , not
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000001"; -- command 1, and
wait for clock_period;
in1 <= "01111111000000000000000000000000"; -- + inf
in2 <= "00111111000000000000000000000010"; -- command 2, or
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000011"; -- command 3, nand
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000100"; -- command 4, nor
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000101"; -- command 5, xor
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000110"; -- command 6, xnor
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000111"; -- command 7, xor '1'
wait for clock_period;
cmd <= "1110"; -- reduce and vector test test
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000000"; -- command 0,
wait for clock_period;
in1 <= "11111111111111111111111111111111"; -- all 1
wait for clock_period;
in1 <= "10000000000000000000000000000000"; -- -0
wait for clock_period;
in1 <= "00000000000000000000000000000000"; -- 0
wait for clock_period;
in1 <= "01111111100000000000000000000000"; -- + inf
in2 <= "00111111100000000000000000000001"; -- command 1, and '0'
wait for clock_period;
in2 <= "10111111100000000000000000000001"; -- command 1, and '1'
wait for clock_period;
in2 <= "00111111100000000000000000000010"; -- command 2, or '0'
wait for clock_period;
in2 <= "10111111100000000000000000000010"; -- command 2, or '1'
wait for clock_period;
in2 <= "00111111100000000000000000000011"; -- command 3, nand '0'
wait for clock_period;
in2 <= "10111111100000000000000000000011"; -- command 3, nand '1'
wait for clock_period;
in2 <= "00111111100000000000000000000100"; -- command 4, nor '0'
wait for clock_period;
in2 <= "10111111100000000000000000000100"; -- command 4, nor '1'
wait for clock_period;
in2 <= "00111111100000000000000000000101"; -- command 5, xor '0'
wait for clock_period;
in2 <= "10111111100000000000000000000101"; -- command 5, xor '1'
wait for clock_period;
in2 <= "00111111100000000000000000000110"; -- command 6, xnor '0'
wait for clock_period;
in2 <= "10111111100000000000000000000110"; -- command 6, xnor '1'
wait for clock_period;
in2 <= "00111111100000000000000000000111"; -- command 7, and '0'
wait for clock_period;
in2 <= "10111111100000000000000000000111"; -- command 7, and '1'
wait for clock_period;
cmd <= "1111"; -- add and mult by constant
in2 <= "10111111100000000000000000000000"; -- command 0, + 1
in1 <= to_float (2, in1);
wait for clock_period;
in2 <= "10111111100000000000000000000001"; -- command 1, 1 +
wait for clock_period;
in2 <= "10111111100000000000000000000010"; -- command 2, + 1.0
wait for clock_period;
in2 <= "10111111100000000000000000000011"; -- command 3, 1.0 +
wait for clock_period;
in2 <= "10111111100000000000000000000100"; -- command 4, * 1
wait for clock_period;
in2 <= "10111111100000000000000000000101"; -- command 5, 1 *
wait for clock_period;
in2 <= "10111111100000000000000000000110"; -- command 6, * 1.0
wait for clock_period;
in2 <= "10111111100000000000000000000111"; -- command 7, 1.0 *
wait for clock_period;
wait for clock_period;
cmd <= "0000"; -- add mode
in1 <= (others => '0');
in2 <= (others => '0');
wait for clock_period;
wait for clock_period;
wait for clock_period;
wait for clock_period;
wait for clock_period;
wait for clock_period;
wait for clock_period;
wait for clock_period;
wait;
end process tester;
-- purpose: check the output of the tester
-- type : combinational
-- inputs :
-- outputs:
checktest : process is
variable out16, out16t : fp16; -- 16 bit fp variables
variable out1t, out2t : float32; -- 32 bit float
variable s16, s16t : SIGNED(7 downto 0); -- 7 bit SIGNED
variable latency : INTEGER := 0;
begin -- process checktest
wait for clock_period/2.0;
floop3: for i in 1 to 100 loop
wait for clock_period;
end loop floop3;
latency := 0;
out2t := "01000000100010101100000000000000";
wl1: while out1 /= out2t loop
wait for clock_period;
latency := latency + 1;
assert latency /= 100 report "After 100 loops, pattern never found"
severity failure;
end loop wl1;
report "Latency was " & INTEGER'image(latency) severity note;
floop4: for i in 1 to 100 loop
wait for clock_period;
end loop floop4;
report_error ("42 * 6.5 error",
out1,
to_float (273, out1));
wait for clock_period;
report_error ("6.5 * 42 error",
out1,
to_float (273, out1'high, -out1'low));
wait for clock_period;
report_error ("Multiply 42.25 miscompare",
out1,
"01000010001010010000000000000000"); -- 42.25
wait for clock_period;
report_error ("Multiply 84 miscompare",
out1,
"01000010101010000000000000000000"); -- 84
wait for clock_period;
report_error ("Multiply 2/3 miscompare",
out1,
"00111111001010101010101010101011"); -- 2/3
wait for clock_period;
report_error ("Multiply -273 miscompare",
out1,
"11000011100010001000000000000000"); -- -273
wait for clock_period;
report_error ("mult 2**-148 test miscompare",
out1,
reverse("01000000000000000000000000000001")); -- -2*-148
wait for clock_period;
report_error ("Multiply 2**-129 miscompare",
out1,
reverse("00000000000000000000100000000000")); -- 2**-129
wait for clock_period;
report_error ("6.5 * 42 error",
out1,
to_float (273, out1));
wait for clock_period;
report_error ("Subtract 30303033 - 30303030 miscompare",
out1,
"01000000000000000000000000000000"); -- 2 (not 3, rounding)
wait for clock_period;
report_error ("Subtract 6.5 - 4 miscompare",
out1,
"01000000001000000000000000000000"); -- 2.5
wait for clock_period;
report_error ("Subtract 4 - 6.5 miscompare",
out1,
"11000000001000000000000000000000"); -- -2.5
wait for clock_period;
report_error ("Subtract 4.333 - 1/3 miscompare",
out1,
"01000000100000000000000000000000"); -- 4
wait for clock_period;
report_error ("Add 2.333 miscompare",
out1,
"01000000000101010101010101010101"); -- 2.333333
wait for clock_period;
report_error ("Add 2.333 rev miscompare",
out1,
"01000000000101010101010101010101"); -- 2.333333
wait for clock_period;
report_error ("Add 4 + miscompare",
out1,
"01000000100000000000000000000001"); -- 4
wait for clock_period;
report_error ("div 1/3 test miscompare",
out1,
"00111110101010101010101010101011"); -- 1/3
wait for clock_period;
report_error ("div 369297/2**-126 test miscompare",
out1,
"01111111100000000000000000000000");
wait for clock_period;
report_error ("-1/6 test miscompare",
out1, "10111110001010101010101010101011"); -- -1/6
wait for clock_period;
-- resize function
out16 := to_float (to_slv (out1(-8 downto -23)), 6, 9);
out16t := to_float (1, out16t);
report_error16 ("1.0 fp16 converserion",
out16, out16t);
wait for clock_period;
out16 := to_float (to_slv (out1(-8 downto -23)), 6, 9);
out16t := to_float (arg => -1.0/3.0, size_res => out16t,
round_style => round_zero);
report_error16 ("-1/3 not rounded fp16 converserion",
out16, out16t);
wait for clock_period;
out16 := to_float (to_slv (out1(-8 downto -23)), 6, 9);
out16t := to_float (-1.0/3.0, out16t);
report_error16 ("-1/3 fp16 converserion",
out16, out16t);
-- conversion test
wait for clock_period;
report_error ("1.0 to unsigned miscompare",
out1, "00000000000000000000000000000001");
wait for clock_period;
report_error ("42 to unsigned miscompare",
out1, "00100000000000000000000000101010");
wait for clock_period;
report_error ("-1.0 to signed miscompare",
out1, "01000000000000001111111111111111");
wait for clock_period;
report_error ("1.0 to signed miscompare",
out1, "01100000000000000000000000000001");
wait for clock_period;
report_error ("4.33 to ufixed miscompare",
out1, "10000000000000000000001000101011");
wait for clock_period;
report_error ("1.0 to ufixed miscompare",
out1, "10100000000000000000000010000000");
wait for clock_period;
report_error ("4.333 to sfixed miscompare",
out1, "11000000000000001111110111010101");
wait for clock_period;
report_error ("1.0 to sfixed miscompare",
out1, "11100000000000000000000010000000");
wait for clock_period;
report_error ("unsigned 3 to float miscompare",
out1, to_float(3, out1));
wait for clock_period;
report_error ("unsigned 4 to float miscompare",
out1, to_float(4, out1));
wait for clock_period;
report_error ("signed -2 to float miscompare",
out1, to_float(-2, out1));
wait for clock_period;
report_error ("signed 4 to float miscompare",
out1, to_float(4, out1));
wait for clock_period;
report_error ("ufixed 4.333 to float miscompare",
out1, "01000000100010101100000000000000"); -- 4.333333
wait for clock_period;
report_error ("ufixed 1.0 to float miscompare",
out1, "00111111100000000000000000000000"); -- 1.0
wait for clock_period;
report_error ("sfixed -4.333 to float miscompare",
out1, "11000000100010101100000000000000"); -- -4.333333
wait for clock_period;
report_error ("sfixed 1.0 to float miscompare",
out1, "00111111100000000000000000000000"); -- 1.0
wait for clock_period;
report_error ("denormal mod denormal miscompare",
out1, zero0);
wait for clock_period;
report_error ("large mod large miscompare",
out1, zero0);
wait for clock_period;
report_error ("-4.333 mod 4 miscompare",
out1,
from_string ("01000000011010101010101010101010", out1));
wait for clock_period;
report_error ("denormal rem denormal miscompare",
out1, zero0);
wait for clock_period;
report_error ("large rem large miscompare",
out1, zero0);
wait for clock_period;
out1t := "10111110101010101010101010110000";
report_error ("-4.333 rem 4 miscompare",
out1, out1t);
wait for clock_period;
report_error ("to_float(0) miscompare",
out1, zero0);
wait for clock_period;
report_error ("to_float(0.0) miscompare",
out1, zero0);
wait for clock_period;
report_error ("to_float(8) miscompare",
out1, to_float(8.0, out1));
wait for clock_period;
report_error ("to_float(8.0) miscompare",
out1, to_float(8, out1));
wait for clock_period;
report_error ("to_float(-8) miscompare",
out1, to_float(-8.0, out1));
wait for clock_period;
report_error ("to_float(-8.0) miscompare",
out1, to_float(-8, out1));
wait for clock_period;
report_error ("to_float(27000) miscompare",
out1, to_float(27000.0, out1));
wait for clock_period;
report_error ("to_float(PI) miscompare",
out1, to_float(3.141592653589, out1));
-- Conversion test
wait for clock_period;
report_error ("-1 miscompare",
out1, to_float(-1, out1));
wait for clock_period;
report_error ("-(-2) miscompare",
out1, to_float(2, out1));
wait for clock_period;
report_error ("abs(-2) miscompare",
out1, to_float(2, out1));
wait for clock_period;
report_error ("abs(1) miscompare",
out1, to_float(1, out1));
wait for clock_period;
report_error ("scalb (1, 1) miscompare",
out1, to_float(2, out1));
wait for clock_period;
report_error ("scalb (1, -1) miscompare",
out1, to_float(0.5, out1));
wait for clock_period;
s16 := SIGNED (to_slv (out1(-16 downto -23)));
assert (s16 = 0) report "logb (1) returned "
& to_string(to_sfixed(s16)) severity error;
wait for clock_period;
s16 := SIGNED (to_slv (out1(-16 downto -23)));
assert (s16 = -2) report "logb (0.25) returned "
& to_string(to_sfixed(s16)) severity error;
wait for clock_period;
out1t := "00111111100000000000000000000001";
report_error ("nextafter (1, 1.5)", out1, out1t);
wait for clock_period;
out1t := "01000000011111111111111111111111";
report_error ("nextafter (4, 1.5)", out1, out1t);
wait for clock_period;
out1t := "00111111011111111111111111111111";
report_error ("nextafter (1, -1.5)", out1, out1t);
wait for clock_period;
out1t := "11000000011111111111111111111111";
report_error ("nextafter (-4, -1.5)", out1, out1t);
wait for clock_period;
out1t := "00111111100000000000000000000001";
report_error ("nextafter (1, inf)", out1, out1t);
wait for clock_period;
out1t := "01000000100000000000000000000001";
report_error ("nextafter (4, inf)", out1, out1t);
wait for clock_period;
out1t := "00111111011111111111111111111111";
report_error ("nextafter (1, neginf)", out1, out1t);
wait for clock_period;
out1t := "11000000100000000000000000000001";
report_error ("nextafter (-4, neginf)", out1, out1t);
wait for clock_period;
report_error ("Copysign (2,2)", out1, to_float(2, out1));
wait for clock_period;
report_error ("Copysign (-3,3)", out1, to_float(3, out1));
wait for clock_period;
report_error ("Copysign (4,-4)", out1, to_float(-4, out1));
wait for clock_period;
report_error ("Copysign (-5,-5)", out1, to_float(-5, out1));
wait for clock_period;
out1t := "10001110000000000000000000000000";
report_error ("compare test 15, 15", out1, out1t);
wait for clock_period;
out1t := "01101001000000000000000000000000";
report_error ("compare test 15.5, -2", out1, out1t);
wait for clock_period;
out1t := "01010100000000000000000000000000";
report_error ("compare test -2, 2", out1, out1t);
wait for clock_period;
out1t := "01101000010000000000000000000000";
report_error ("compare test inf, -2", out1, out1t);
wait for clock_period;
out1t := "01000000101000000000000000000000";
report_error ("compare test NAN, -2", out1, out1t);
wait for clock_period;
out1t := "10000000011111111111111111111111"; -- not + inf
report_error ("not +inf", out1, out1t);
wait for clock_period;
out1t := "00111111100000000000000000000000"; -- and
report_error ("and +inf", out1, out1t);
wait for clock_period;
out1t := "01111111000000000000000000000010"; -- or
report_error ("or +inf", out1, out1t);
wait for clock_period;
out1t := "11000000011111111111111111111111"; -- nand
report_error ("nand +inf", out1, out1t);
wait for clock_period;
out1t := "10000000011111111111111111111011"; -- nor
report_error ("nor +inf", out1, out1t);
wait for clock_period;
out1t := "01000000000000000000000000000101"; -- xor
report_error ("xor +inf", out1, out1t);
wait for clock_period;
out1t := "10111111111111111111111111111001"; -- xnor
report_error ("xnor +inf", out1, out1t);
wait for clock_period;
out1t := "10000000011111111111111111111111"; -- xnor '1'
report_error ("+inf xor '1'", out1, out1t);
wait for clock_period;
out1t := "01100100000000000000000000000000"; -- reduce test
report_error ("_reduce test", out1, out1t);
wait for clock_period;
out1t := "10100100000000000000000000000000"; -- reduce test
report_error ("_reduce all 1 test", out1, out1t);
wait for clock_period;
out1t := "01101000000000000000000000000000"; -- reduce test
report_error ("_reduce -0 test", out1, out1t);
wait for clock_period;
out1t := "01010100000000000000000000000000"; -- reduce test
report_error ("_reduce 0 test", out1, out1t);
wait for clock_period;
out1t := "00000000000000000000000000000000"; -- 0
report_error ("and 0 test", out1, out1t);
wait for clock_period;
out1t := "01111111100000000000000000000000"; -- + inf
report_error ("and 1 test", out1, out1t);
wait for clock_period;
out1t := "01111111100000000000000000000000"; -- + inf
report_error ("or 0 test", out1, out1t);
wait for clock_period;
out1t := "11111111111111111111111111111111"; -- all 1
assert (to_slv (out1) = to_slv (out1t))
report "or 1 test error " & to_string (out1) & " /= "
& to_string (out1t) severity error;
wait for clock_period;
out1t := "11111111111111111111111111111111"; -- all 1
assert (to_slv (out1) = to_slv (out1t))
report "nand 0 test error " & to_string (out1) & " /= "
& to_string (out1t) severity error;
wait for clock_period;
out1t := "10000000011111111111111111111111"; -- - denormal
report_error ("nand 1 test", out1, out1t);
wait for clock_period;
out1t := "10000000011111111111111111111111"; -- - denormal
report_error ("nor 0 test", out1, out1t);
wait for clock_period;
out1t := "00000000000000000000000000000000"; -- 0
report_error ("nor 1 test", out1, out1t);
wait for clock_period;
out1t := "01111111100000000000000000000000"; -- + inf
report_error ("xor 0 test", out1, out1t);
wait for clock_period;
out1t := "10000000011111111111111111111111"; -- - denormal
report_error ("xor 1 test", out1, out1t);
wait for clock_period;
out1t := "10000000011111111111111111111111"; -- - denormal
report_error ("xnor 0 test", out1, out1t);
wait for clock_period;
out1t := "01111111100000000000000000000000"; -- + inf
report_error ("xnor 1 test", out1, out1t);
wait for clock_period;
out1t := "00000000000000000000000000000000"; -- 0
report_error ("and 0 test", out1, out1t);
wait for clock_period;
out1t := "01111111100000000000000000000000"; -- + inf
report_error ("and 1 test", out1, out1t);
wait for clock_period;
out1t := to_float(3, out1t);
report_error ("2 + 1 test", out1, out1t);
wait for clock_period;
report_error ("1 + 2 test", out1, out1t);
wait for clock_period;
report_error ("2 + 1.0 test", out1, out1t);
wait for clock_period;
report_error ("1.0 + 2 test", out1, out1t);
wait for clock_period;
out1t := to_float(2, out1t);
report_error ("2 * 1 test", out1, out1t);
wait for clock_period;
report_error ("1 * 2 test", out1, out1t);
wait for clock_period;
report_error ("2 * 1.0 test", out1, out1t);
wait for clock_period;
report_error ("1.0 * 2 test", out1, out1t);
wait for clock_period;
assert (false) report "Testing complete" severity note;
stop_clock <= true;
wait;
end process checktest;
end architecture testbench;