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HDL
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RTSD
HDL
Commits
1b281752
Commit
1b281752
authored
Mar 10, 2022
by
Eric Kooistra
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Added functions COMPLEX_*() to convert between polar and rectangular coordinates.
parent
8aeebc8a
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!219
No functional change. Use short index variables names in capitals, to ease...
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#26244
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Mar 10, 2022
Stage: simulation
Stage: synthesis
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libraries/base/common/src/vhdl/common_pkg.vhd
+53
-1
53 additions, 1 deletion
libraries/base/common/src/vhdl/common_pkg.vhd
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53 additions
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1 deletion
libraries/base/common/src/vhdl/common_pkg.vhd
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1b281752
...
...
@@ -471,6 +471,15 @@ PACKAGE common_pkg IS
FUNCTION
COMPLEX_MULT_REAL
(
a_re
,
a_im
,
b_re
,
b_im
:
INTEGER
)
RETURN
INTEGER
;
-- Calculate real part of complex multiplication: a_re*b_re - a_im*b_im
FUNCTION
COMPLEX_MULT_IMAG
(
a_re
,
a_im
,
b_re
,
b_im
:
INTEGER
)
RETURN
INTEGER
;
-- Calculate imag part of complex multiplication: a_im*b_re + a_re*b_im
FUNCTION
COMPLEX_RADIUS
(
re
,
im
:
REAL
)
RETURN
REAL
;
FUNCTION
COMPLEX_RADIUS
(
re
,
im
:
INTEGER
)
RETURN
REAL
;
FUNCTION
COMPLEX_PHASE
(
re
,
im
:
REAL
)
RETURN
REAL
;
-- in degrees
FUNCTION
COMPLEX_PHASE
(
re
,
im
:
INTEGER
)
RETURN
REAL
;
-- in degrees
FUNCTION
COMPLEX_RE
(
ampl
,
phase
:
REAL
)
RETURN
REAL
;
-- phase in degrees
FUNCTION
COMPLEX_RE
(
ampl
,
phase
:
INTEGER
)
RETURN
REAL
;
-- phase in degrees
FUNCTION
COMPLEX_IM
(
ampl
,
phase
:
REAL
)
RETURN
REAL
;
-- phase in degrees
FUNCTION
COMPLEX_IM
(
ampl
,
phase
:
INTEGER
)
RETURN
REAL
;
-- phase in degrees
FUNCTION
SHIFT_UVEC
(
vec
:
STD_LOGIC_VECTOR
;
shift
:
INTEGER
)
RETURN
STD_LOGIC_VECTOR
;
-- < 0 shift left, > 0 shift right
FUNCTION
SHIFT_SVEC
(
vec
:
STD_LOGIC_VECTOR
;
shift
:
INTEGER
)
RETURN
STD_LOGIC_VECTOR
;
-- < 0 shift left, > 0 shift right
...
...
@@ -2255,6 +2264,49 @@ PACKAGE BODY common_pkg IS
RETURN
(
a_im
*
b_re
+
a_re
*
b_im
);
END
;
FUNCTION
COMPLEX_RADIUS
(
re
,
im
:
REAL
)
RETURN
REAL
IS
BEGIN
-- Must use ABS() with ** of real, because (negative)**2.0 yields error and value 0.0.
-- Must must use brackets (ABS()) to avoid compile error.
-- Alternative equivalent code would be: SQRT(re * re + im * im).
RETURN
SQRT
((
ABS
(
re
))
**
2
.
0
+
(
ABS
(
im
))
**
2
.
0
);
END
;
FUNCTION
COMPLEX_RADIUS
(
re
,
im
:
INTEGER
)
RETURN
REAL
IS
BEGIN
RETURN
COMPLEX_RADIUS
(
REAL
(
re
),
REAL
(
im
));
END
;
FUNCTION
COMPLEX_PHASE
(
re
,
im
:
REAL
)
RETURN
REAL
IS
-- in degrees
BEGIN
RETURN
ATAN2
(
Y
=>
im
,
X
=>
re
)
*
360
.
0
/
MATH_2_PI
;
END
;
FUNCTION
COMPLEX_PHASE
(
re
,
im
:
INTEGER
)
RETURN
REAL
IS
-- in degrees
BEGIN
RETURN
COMPLEX_PHASE
(
REAL
(
re
),
REAL
(
im
));
END
;
FUNCTION
COMPLEX_RE
(
ampl
,
phase
:
REAL
)
RETURN
REAL
IS
-- phase in degrees
BEGIN
RETURN
ampl
*
COS
(
phase
*
MATH_2_PI
/
360
.
0
);
END
;
FUNCTION
COMPLEX_RE
(
ampl
,
phase
:
INTEGER
)
RETURN
REAL
IS
-- phase in degrees
BEGIN
RETURN
COMPLEX_RE
(
REAL
(
ampl
),
REAL
(
phase
));
END
;
FUNCTION
COMPLEX_IM
(
ampl
,
phase
:
REAL
)
RETURN
REAL
IS
-- phase in degrees
BEGIN
RETURN
ampl
*
SIN
(
phase
*
MATH_2_PI
/
360
.
0
);
END
;
FUNCTION
COMPLEX_IM
(
ampl
,
phase
:
INTEGER
)
RETURN
REAL
IS
-- phase in degrees
BEGIN
RETURN
COMPLEX_IM
(
REAL
(
ampl
),
REAL
(
phase
));
END
;
FUNCTION
SHIFT_UVEC
(
vec
:
STD_LOGIC_VECTOR
;
shift
:
INTEGER
)
RETURN
STD_LOGIC_VECTOR
IS
BEGIN
IF
shift
<
0
THEN
...
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