diff options
Diffstat (limited to 'libraries/openieee/build_numeric.py')
| -rwxr-xr-x | libraries/openieee/build_numeric.py | 80 |
1 files changed, 64 insertions, 16 deletions
diff --git a/libraries/openieee/build_numeric.py b/libraries/openieee/build_numeric.py index a8914d0ce..c00e74e5c 100755 --- a/libraries/openieee/build_numeric.py +++ b/libraries/openieee/build_numeric.py @@ -37,6 +37,8 @@ logic_undefs = {'bit' : "'0'", 'std': "'X'" } logic = 'xx' # Current logic, either bit or std +v93=False + # Stream to write. out=sys.stdout @@ -115,7 +117,7 @@ def extract_extend_bit(name,typ): def disp_vec_vec_binary(func, typ): "Generate vector binary function body" res = """ - function "{0}" (l : {1}; r : {1}) return {1} + function "{0}" (l, r : {1}) return {1} is constant lft : integer := MAX (l'length, r'length) - 1; subtype res_type is {1} (lft downto 0); @@ -366,7 +368,7 @@ def disp_vec_int_compare(func, left, right): def disp_vec_vec_gcompare(func, typ): "Generate comparison function" res = """ - function {func} (l : {typ}; r : {typ}) return compare_type + function {func} (l, r : {typ}) return compare_type is constant sz : integer := MAX (l'length, r'length) - 1; alias la : {typ} (l'length - 1 downto 0) is l; @@ -418,7 +420,7 @@ def disp_vec_vec_gcompare(func, typ): def disp_vec_vec_compare(func, typ): "Generate comparison function" res = """ - function "{func}" (l : {typ}; r : {typ}) return boolean + function "{func}" (l, r : {typ}) return boolean is variable res : compare_type; begin @@ -498,6 +500,40 @@ def disp_resize(typ): end resize;\n""" w(res.format(typ)) +def gen_shift(dir, inv): + if (dir == 'left') ^ inv: + res = """ + res (res'left downto {opp}count) := arg1 (arg1'left {sub} count downto 0);""" + else: + res = """ + res (res'left {sub} count downto 0) := arg1 (arg1'left downto {opp}count);""" + if inv: + return res.format(opp="-", sub="+") + else: + return res.format(opp="", sub="-") + +def disp_shift_op(name, typ, dir): + res = """ + function {0} (ARG : {1}; COUNT: INTEGER) return {1} + is + subtype res_type is {1} (ARG'length - 1 downto 0); + alias arg1 : res_type is arg; + variable res : res_type := (others => '0'); + begin + if res'length = 0 then + return null_{1}; + end if; + if count >= 0 and count <= arg1'left then""" + res += gen_shift(dir, False) + res += """ + elsif count < 0 and count >= -arg1'left then""" + res += gen_shift(dir, True) + res += """ + end if; + return res; + end {0};\n""" + w(res.format(name, typ)) + def disp_shift(name, typ, dir): res = """ function {0} (ARG : {1}; COUNT: NATURAL) return {1} @@ -515,12 +551,7 @@ def disp_shift(name, typ, dir): return null_{1}; end if; if count <= arg1'left then""" - if dir == 'left': - res += """ - res (res'left downto count) := arg1 (arg1'left - count downto 0);""" - else: - res += """ - res (res'left - count downto 0) := arg1 (arg1'left downto count);""" + res += gen_shift(dir, False) res += """ end if; return res; @@ -528,8 +559,14 @@ def disp_shift(name, typ, dir): w(res.format(name, typ)) def disp_rotate(name, typ, dir): + if 'rotate' in name: + count_type = 'natural' + op = 'rem' + else: + count_type = 'integer' + op = 'mod' res = """ - function {0} (ARG : {1}; COUNT: NATURAL) return {1} + function {0} (ARG : {1}; COUNT: {2}) return {1} is subtype res_type is {1} (ARG'length - 1 downto 0); alias arg1 : res_type is arg; @@ -539,7 +576,7 @@ def disp_rotate(name, typ, dir): if res'length = 0 then return null_{1}; end if; - cnt := count rem res'length;""" + cnt := count """ + op + " res'length;" if dir == 'left': res += """ res (res'left downto cnt) := arg1 (res'left - cnt downto 0); @@ -551,11 +588,11 @@ def disp_rotate(name, typ, dir): res += """ return res; end {0};\n""" - w(res.format(name, typ)) + w(res.format(name, typ, count_type)) def disp_vec_vec_mul(func, typ): res = """ - function "{0}" (L : {1}; R : {1}) return {1} + function "{0}" (L, R : {1}) return {1} is alias la : {1} (L'Length - 1 downto 0) is l; alias ra : {1} (R'Length - 1 downto 0) is r; @@ -780,7 +817,7 @@ def disp_divmod(): def disp_vec_vec_udiv(func): res = """ - function "{func}" (L : UNSIGNED; R : UNSIGNED) return UNSIGNED + function "{func}" (L, R : UNSIGNED) return UNSIGNED is subtype l_type is UNSIGNED (L'length - 1 downto 0); subtype r_type is UNSIGNED (R'length - 1 downto 0); @@ -853,7 +890,7 @@ def disp_vec_int_udiv(func): def disp_vec_vec_sdiv(func): res = """ - function "{func}" (L : SIGNED; R : SIGNED) return SIGNED + function "{func}" (L, R : SIGNED) return SIGNED is subtype l_type is SIGNED (L'length - 1 downto 0); subtype r_type is SIGNED (R'length - 1 downto 0); @@ -994,6 +1031,11 @@ def disp_all_log_funcs(): disp_shift('shift_' + d, t, d); for d in ['left', 'right']: disp_rotate('rotate_' + d, t, d); + if v93: + disp_shift_op('"sll"', t, 'left') + disp_shift_op('"srl"', t, 'right') + disp_rotate('"rol"', t, 'left') + disp_rotate('"ror"', t, 'right') def disp_match(typ): res = """ @@ -1089,7 +1131,11 @@ for log in logics: for lcom in open('numeric_common.proto'): if lcom[0:2] == '--': pass - elif std == '87' and '"xnor"' in lcom: + elif std == '87' and ('"xnor"' in lcom + or '"sll"' in lcom + or '"srl"' in lcom + or '"rol"' in lcom + or '"ror"' in lcom): w("--" + lcom[2:]) else: w(lcom) @@ -1098,12 +1144,14 @@ for log in logics: out.close() # Generate bodies +v93=False for l in logics: logic = l out=open('numeric_{0}-body.v87'.format(l), 'w') gen_body('numeric_{0}-body.proto'.format(l)) out.close() +v93=True binary_funcs.append("xnor") for l in logics: logic = l |