-- -------------------------------------------------------------------- -- -- Copyright 1995 by IEEE. All rights reserved. -- -- This source file is considered by the IEEE to be an essential part of the use -- of the standard 1076.3 and as such may be distributed without change, except -- as permitted by the standard. This source file may not be sold or distributed -- for profit. This package may be modified to include additional data required -- by tools, but must in no way change the external interfaces or simulation -- behaviour of the description. It is permissible to add comments and/or -- attributes to the package declarations, but not to change or delete any -- original lines of the approved package declaration. The package body may be -- changed only in accordance with the terms of clauses 7.1 and 7.2 of the -- standard. -- -- Title : Standard VHDL Synthesis Package (1076.3, NUMERIC_STD) -- -- Library : This package shall be compiled into a library symbolically -- : named IEEE. -- -- Developers : IEEE DASC Synthesis Working Group, PAR 1076.3 -- -- Purpose : This package defines numeric types and arithmetic functions -- : for use with synthesis tools. Two numeric types are defined: -- : -- > UNSIGNED: represents UNSIGNED number in vector form -- : -- > SIGNED: represents a SIGNED number in vector form -- : The base element type is type STD_LOGIC. -- : The leftmost bit is treated as the most significant bit. -- : Signed vectors are represented in two's complement form. -- : This package contains overloaded arithmetic operators on -- : the SIGNED and UNSIGNED types. The package also contains -- : useful type conversions functions. -- : -- : If any argument to a function is a null array, a null array is -- : returned (exceptions, if any, are noted individually). -- -- Limitation : -- -- Note : No declarations or definitions shall be included in, -- : or excluded from this package. The "package declaration" -- : defines the types, subtypes and declarations of -- : NUMERIC_STD. The NUMERIC_STD package body shall be -- : considered the formal definition of the semantics of -- : this package. Tool developers may choose to implement -- : the package body in the most efficient manner available -- : to them. -- -- -------------------------------------------------------------------- -- modification history : -- -------------------------------------------------------------------- -- Version: 2.4 -- Date : 12 April 1995 -- ----------------------------------------------------------------------------- --============================================================================== --============================= Package Body =================================== --============================================================================== package body NUMERIC_STD is -- null range array constants constant NAU: UNSIGNED(0 downto 1) := (others => '0'); constant NAS: SIGNED(0 downto 1) := (others => '0'); -- implementation controls constant NO_WARNING: BOOLEAN := FALSE; -- default to emit warnings --=========================Local Subprograms ================================= function MAX (LEFT, RIGHT: INTEGER) return INTEGER is begin if LEFT > RIGHT then return LEFT; else return RIGHT; end if; end MAX; function MIN (LEFT, RIGHT: INTEGER) return INTEGER is begin if LEFT < RIGHT then return LEFT; else return RIGHT; end if; end MIN; function SIGNED_NUM_BITS (ARG: INTEGER) return NATURAL is variable NBITS: NATURAL; variable N: NATURAL; begin if ARG >= 0 then N := ARG; else N := -(ARG+1); end if; NBITS := 1; while N > 0 loop NBITS := NBITS+1; N := N / 2; end loop; return NBITS; end SIGNED_NUM_BITS; function UNSIGNED_NUM_BITS (ARG: NATURAL) return NATURAL is variable NBITS: NATURAL; variable N: NATURAL; begin N := ARG; NBITS := 1; while N > 1 loop NBITS := NBITS+1; N := N / 2; end loop; return NBITS; end UNSIGNED_NUM_BITS; ------------------------------------------------------------------------ -- this internal function computes the addition of two UNSIGNED -- with input CARRY -- * the two arguments are of the same length function ADD_UNSIGNED (L, R: UNSIGNED; C: STD_LOGIC) return UNSIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(L_LEFT downto 0) is R; variable RESULT: UNSIGNED(L_LEFT downto 0); variable CBIT: STD_LOGIC := C; begin for I in 0 to L_LEFT loop RESULT(I) := CBIT xor XL(I) xor XR(I); CBIT := (CBIT and XL(I)) or (CBIT and XR(I)) or (XL(I) and XR(I)); end loop; return RESULT; end ADD_UNSIGNED; -- this internal function computes the addition of two SIGNED -- with input CARRY -- * the two arguments are of the same length function ADD_SIGNED (L, R: SIGNED; C: STD_LOGIC) return SIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(L_LEFT downto 0) is R; variable RESULT: SIGNED(L_LEFT downto 0); 
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2022 The Chromium OS Authors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>

#include "libflashrom.h"

void log_rust(enum flashrom_log_level level, const char *format);

// LOG_LEVEL = 0 (ERROR) means no messages are printed.
enum flashrom_log_level current_level = 0;

static int log_c(enum flashrom_log_level level, const char *format, va_list ap)
{
	static char *buf = NULL;
	static int len = 0;
	if (level >= current_level) {
		return 0;
	}

	va_list ap2;
	va_copy(ap2, ap);
	// when buf is NULL, len is zero and this will not write to buf
	int req_len = vsnprintf(buf, len, format, ap2);
	va_end(ap2);

	if (req_len > len) {
		char *new_buf = realloc(buf, req_len + 1);
		if (!new_buf) {
			return 0;
		}
		buf = new_buf;
		len = req_len + 1;
		req_len = vsnprintf(buf, len, format, ap);
	}

	if (req_len > 0) {
		log_rust(level, buf);
	}
	return req_len;
}

void set_log_callback()
{
	flashrom_set_log_callback(log_c);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-11 08:27:08 +0000
ariable XR: SIGNED(R_LEFT downto 0); variable RESULT: SIGNED((L_LEFT+R_LEFT+1) downto 0) := (others => '0'); variable ADVAL: SIGNED((L_LEFT+R_LEFT+1) downto 0); begin if ((L_LEFT < 0) or (R_LEFT < 0)) then return NAS; end if; XL := TO_01(L, 'X'); XR := TO_01(R, 'X'); if ((XL(L_LEFT)='X') or (XR(R_LEFT)='X')) then RESULT := (others => 'X'); return RESULT; end if; ADVAL := RESIZE(XR, RESULT'LENGTH); for I in 0 to L_LEFT-1 loop if XL(I)='1' then RESULT := RESULT + ADVAL; end if; ADVAL := SHIFT_LEFT(ADVAL, 1); end loop; if XL(L_LEFT)='1' then RESULT := RESULT - ADVAL; end if; return RESULT; end "*"; -- Id: A.17 function "*" (L: UNSIGNED; R: NATURAL) return UNSIGNED is begin return L * TO_UNSIGNED(R, L'LENGTH); end "*"; -- Id: A.18 function "*" (L: NATURAL; R: UNSIGNED) return UNSIGNED is begin return TO_UNSIGNED(L, R'LENGTH) * R; end "*"; -- Id: A.19 function "*" (L: SIGNED; R: INTEGER) return SIGNED is begin return L * TO_SIGNED(R, L'LENGTH); end "*"; -- Id: A.20 function "*" (L: INTEGER; R: SIGNED) return SIGNED is begin return TO_SIGNED(L, R'LENGTH) * R; end "*"; --============================================================================ -- Id: A.21 function "/" (L, R: UNSIGNED) return UNSIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XXL: UNSIGNED(L_LEFT downto 0) is L; alias XXR: UNSIGNED(R_LEFT downto 0) is R; variable XL: UNSIGNED(L_LEFT downto 0); variable XR: UNSIGNED(R_LEFT downto 0); variable FQUOT: UNSIGNED(L'LENGTH-1 downto 0); variable FREMAIN: UNSIGNED(R'LENGTH-1 downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then return NAU; end if; XL := TO_01(XXL, 'X'); XR := TO_01(XXR, 'X'); if ((XL(XL'LEFT)='X') or (XR(XR'LEFT)='X')) then FQUOT := (others => 'X'); return FQUOT; end if; DIVMOD(XL, XR, FQUOT, FREMAIN); return FQUOT; end "/"; -- Id: A.22 function "/" (L, R: SIGNED) return SIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XXL: SIGNED(L_LEFT downto 0) is L; alias XXR: SIGNED(R_LEFT downto 0) is R; variable XL: SIGNED(L_LEFT downto 0); variable XR: SIGNED(R_LEFT downto 0); variable FQUOT: UNSIGNED(L'LENGTH-1 downto 0); variable FREMAIN: UNSIGNED(R'LENGTH-1 downto 0); variable XNUM: UNSIGNED(L'LENGTH-1 downto 0); variable XDENOM: UNSIGNED(R'LENGTH-1 downto 0); variable QNEG: BOOLEAN := FALSE; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then return NAS; end if; XL := TO_01(XXL, 'X'); XR := TO_01(XXR, 'X'); if ((XL(XL'LEFT)='X') or (XR(XR'LEFT)='X')) then FQUOT := (others => 'X'); return SIGNED(FQUOT); end if; if XL(XL'LEFT)='1' then XNUM := UNSIGNED(-XL); QNEG := TRUE; else XNUM := UNSIGNED(XL); end if; if XR(XR'LEFT)='1' then XDENOM := UNSIGNED(-XR); QNEG := not QNEG; else XDENOM := UNSIGNED(XR); end if; DIVMOD(XNUM, XDENOM, FQUOT, FREMAIN); if QNEG then FQUOT := "0"-FQUOT; end if; return SIGNED(FQUOT); end "/"; -- Id: A.23 function "/" (L: UNSIGNED; R: NATURAL) return UNSIGNED is constant R_LENGTH: NATURAL := MAX(L'LENGTH, UNSIGNED_NUM_BITS(R)); variable XR, QUOT: UNSIGNED(R_LENGTH-1 downto 0); begin if (L'LENGTH < 1) then return NAU; end if; if (R_LENGTH > L'LENGTH) then QUOT := (others => '0'); return RESIZE(QUOT, L'LENGTH); end if; XR := TO_UNSIGNED(R, R_LENGTH); QUOT := RESIZE((L / XR), QUOT'LENGTH); return RESIZE(QUOT, L'LENGTH); end "/"; -- Id: A.24 function "/" (L: NATURAL; R: UNSIGNED) return UNSIGNED is constant L_LENGTH: NATURAL := MAX(UNSIGNED_NUM_BITS(L), R'LENGTH); variable XL, QUOT: UNSIGNED(L_LENGTH-1 downto 0); begin if (R'LENGTH < 1) then return NAU; end if; XL := TO_UNSIGNED(L, L_LENGTH); QUOT := RESIZE((XL / R), QUOT'LENGTH); if L_LENGTH > R'LENGTH and QUOT(0)/='X' and QUOT(L_LENGTH-1 downto R'LENGTH) /= (L_LENGTH-1 downto R'LENGTH => '0') then assert NO_WARNING report "NUMERIC_STD.""/"": Quotient Truncated" severity WARNING; end if; return RESIZE(QUOT, R'LENGTH); end "/"; -- Id: A.25 function "/" (L: SIGNED; R: INTEGER) return SIGNED is constant R_LENGTH: NATURAL := MAX(L'LENGTH, SIGNED_NUM_BITS(R)); variable XR, QUOT: SIGNED(R_LENGTH-1 downto 0); begin if (L'LENGTH < 1) then return NAS; end if; if (R_LENGTH > L'LENGTH) then QUOT := (others => '0'); return RESIZE(QUOT, L'LENGTH); end if; XR := TO_SIGNED(R, R_LENGTH); QUOT := RESIZE((L / XR), QUOT'LENGTH); return RESIZE(QUOT, L'LENGTH); end "/"; -- Id: A.26 function "/" (L: INTEGER; R: SIGNED) return SIGNED is constant L_LENGTH: NATURAL := MAX(SIGNED_NUM_BITS(L), R'LENGTH); variable XL, QUOT: SIGNED(L_LENGTH-1 downto 0); begin if (R'LENGTH < 1) then return NAS; end if; XL := TO_SIGNED(L, L_LENGTH); QUOT := RESIZE((XL / R), QUOT'LENGTH); if L_LENGTH > R'LENGTH and QUOT(0)/='X' and QUOT(L_LENGTH-1 downto R'LENGTH) /= (L_LENGTH-1 downto R'LENGTH => QUOT(R'LENGTH-1)) then assert NO_WARNING report "NUMERIC_STD.""/"": Quotient Truncated" severity WARNING; end if; return RESIZE(QUOT, R'LENGTH); end "/"; --============================================================================ -- Id: A.27 function "rem" (L, R: UNSIGNED) return UNSIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XXL: UNSIGNED(L_LEFT downto 0) is L; alias XXR: UNSIGNED(R_LEFT downto 0) is R; variable XL: UNSIGNED(L_LEFT downto 0); variable XR: UNSIGNED(R_LEFT downto 0); variable FQUOT: UNSIGNED(L'LENGTH-1 downto 0); variable FREMAIN: UNSIGNED(R'LENGTH-1 downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then return NAU; end if; XL := TO_01(XXL, 'X'); XR := TO_01(XXR, 'X'); if ((XL(XL'LEFT)='X') or (XR(XR'LEFT)='X')) then FREMAIN := (others => 'X'); return FREMAIN; end if; DIVMOD(XL, XR, FQUOT, FREMAIN); return FREMAIN; end "rem"; -- Id: A.28 function "rem" (L, R: SIGNED) return SIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XXL: SIGNED(L_LEFT downto 0) is L; alias XXR: SIGNED(R_LEFT downto 0) is R; variable FQUOT: UNSIGNED(L'LENGTH-1 downto 0); variable FREMAIN: UNSIGNED(R'LENGTH-1 downto 0); variable XNUM: UNSIGNED(L'LENGTH-1 downto 0); variable XDENOM: UNSIGNED(R'LENGTH-1 downto 0); variable RNEG: BOOLEAN := FALSE; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then return NAS; end if; XNUM := UNSIGNED(TO_01(XXL, 'X')); XDENOM := UNSIGNED(TO_01(XXR, 'X')); if ((XNUM(XNUM'LEFT)='X') or (XDENOM(XDENOM'LEFT)='X')) then FREMAIN := (others => 'X'); return SIGNED(FREMAIN); end if; if XNUM(XNUM'LEFT)='1' then XNUM := UNSIGNED(-SIGNED(XNUM)); RNEG := TRUE; else XNUM := UNSIGNED(XNUM); end if; if XDENOM(XDENOM'LEFT)='1' then XDENOM := UNSIGNED(-SIGNED(XDENOM)); else XDENOM := UNSIGNED(XDENOM); end if; DIVMOD(XNUM, XDENOM, FQUOT, FREMAIN); if RNEG then FREMAIN := "0"-FREMAIN; end if; return SIGNED(FREMAIN); end "rem"; -- Id: A.29 function "rem" (L: UNSIGNED; R: NATURAL) return UNSIGNED is constant R_LENGTH: NATURAL := MAX(L'LENGTH, UNSIGNED_NUM_BITS(R)); variable XR, XREM: UNSIGNED(R_LENGTH-1 downto 0); begin if (L'LENGTH < 1) then return NAU; end if; XR := TO_UNSIGNED(R, R_LENGTH); XREM := L rem XR; if R_LENGTH > L'LENGTH and XREM(0)/='X' and XREM(R_LENGTH-1 downto L'LENGTH) /= (R_LENGTH-1 downto L'LENGTH => '0') then assert NO_WARNING report "NUMERIC_STD.""rem"": Remainder Truncated" severity WARNING; end if; return RESIZE(XREM, L'LENGTH); end "rem"; -- Id: A.30 function "rem" (L: NATURAL; R: UNSIGNED) return UNSIGNED is constant L_LENGTH: NATURAL := MAX(UNSIGNED_NUM_BITS(L), R'LENGTH); variable XL, XREM: UNSIGNED(L_LENGTH-1 downto 0); begin XL := TO_UNSIGNED(L, L_LENGTH); XREM := XL rem R; if L_LENGTH > R'LENGTH and XREM(0)/='X' and XREM(L_LENGTH-1 downto R'LENGTH) /= (L_LENGTH-1 downto R'LENGTH => '0') then assert NO_WARNING report "NUMERIC_STD.""rem"": Remainder Truncated" severity WARNING; end if; return RESIZE(XREM, R'LENGTH); end "rem"; -- Id: A.31 function "rem" (L: SIGNED; R: INTEGER) return SIGNED is constant R_LENGTH: NATURAL := MAX(L'LENGTH, SIGNED_NUM_BITS(R)); variable XR, XREM: SIGNED(R_LENGTH-1 downto 0); begin if (L'LENGTH < 1) then return NAS; end if; XR := TO_SIGNED(R, R_LENGTH); XREM := RESIZE((L rem XR), XREM'LENGTH); if R_LENGTH > L'LENGTH and XREM(0)/='X' and XREM(R_LENGTH-1 downto L'LENGTH) /= (R_LENGTH-1 downto L'LENGTH => XREM(L'LENGTH-1)) then assert NO_WARNING report "NUMERIC_STD.""rem"": Remainder Truncated" severity WARNING; end if; return RESIZE(XREM, L'LENGTH); end "rem"; -- Id: A.32 function "rem" (L: INTEGER; R: SIGNED) return SIGNED is constant L_LENGTH: NATURAL := MAX(SIGNED_NUM_BITS(L), R'LENGTH); variable XL, XREM: SIGNED(L_LENGTH-1 downto 0); begin if (R'LENGTH < 1) then return NAS; end if; XL := TO_SIGNED(L, L_LENGTH); XREM := RESIZE((XL rem R), XREM'LENGTH); if L_LENGTH > R'LENGTH and XREM(0)/='X' and XREM(L_LENGTH-1 downto R'LENGTH) /= (L_LENGTH-1 downto R'LENGTH => XREM(R'LENGTH-1)) then assert NO_WARNING report "NUMERIC_STD.""rem"": Remainder Truncated" severity WARNING; end if; return RESIZE(XREM, R'LENGTH); end "rem"; --============================================================================ -- Id: A.33 function "mod" (L, R: UNSIGNED) return UNSIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XXL: UNSIGNED(L_LEFT downto 0) is L; alias XXR: UNSIGNED(R_LEFT downto 0) is R; variable XL: UNSIGNED(L_LEFT downto 0); variable XR: UNSIGNED(R_LEFT downto 0); variable FQUOT: UNSIGNED(L'LENGTH-1 downto 0); variable FREMAIN: UNSIGNED(R'LENGTH-1 downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then return NAU; end if; XL := TO_01(XXL, 'X'); XR := TO_01(XXR, 'X'); if ((XL(XL'LEFT)='X') or (XR(XR'LEFT)='X')) then FREMAIN := (others => 'X'); return FREMAIN; end if; DIVMOD(XL, XR, FQUOT, FREMAIN); return FREMAIN; end "mod"; -- Id: A.34 function "mod" (L, R: SIGNED) return SIGNED is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XXL: SIGNED(L_LEFT downto 0) is L; alias XXR: SIGNED(R_LEFT downto 0) is R; variable XL: SIGNED(L_LEFT downto 0); variable XR: SIGNED(R_LEFT downto 0); variable FQUOT: UNSIGNED(L'LENGTH-1 downto 0); variable FREMAIN: UNSIGNED(R'LENGTH-1 downto 0); variable XNUM: UNSIGNED(L'LENGTH-1 downto 0); variable XDENOM: UNSIGNED(R'LENGTH-1 downto 0); variable RNEG: BOOLEAN := FALSE; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then return NAS; end if; XL := TO_01(XXL, 'X'); XR := TO_01(XXR, 'X'); if ((XL(XL'LEFT)='X') or (XR(XR'LEFT)='X')) then FREMAIN := (others => 'X'); return SIGNED(FREMAIN); end if; if XL(XL'LEFT)='1' then XNUM := UNSIGNED(-XL); else XNUM := UNSIGNED(XL); end if; if XR(XR'LEFT)='1' then XDENOM := UNSIGNED(-XR); RNEG := TRUE; else XDENOM := UNSIGNED(XR); end if; DIVMOD(XNUM, XDENOM, FQUOT, FREMAIN); if RNEG and L(L'LEFT)='1' then FREMAIN := "0"-FREMAIN; elsif RNEG and FREMAIN/="0" then FREMAIN := FREMAIN-XDENOM; elsif L(L'LEFT)='1' and FREMAIN/="0" then FREMAIN := XDENOM-FREMAIN; end if; return SIGNED(FREMAIN); end "mod"; -- Id: A.35 function "mod" (L: UNSIGNED; R: NATURAL) return UNSIGNED is constant R_LENGTH: NATURAL := MAX(L'LENGTH, UNSIGNED_NUM_BITS(R)); variable XR, XREM: UNSIGNED(R_LENGTH-1 downto 0); begin if (L'LENGTH < 1) then return NAU; end if; XR := TO_UNSIGNED(R, R_LENGTH); XREM := RESIZE((L mod XR), XREM'LENGTH); if R_LENGTH > L'LENGTH and XREM(0)/='X' and XREM(R_LENGTH-1 downto L'LENGTH) /= (R_LENGTH-1 downto L'LENGTH => '0') then assert NO_WARNING report "NUMERIC_STD.""mod"": Modulus Truncated" severity WARNING; end if; return RESIZE(XREM, L'LENGTH); end "mod"; -- Id: A.36 function "mod" (L: NATURAL; R: UNSIGNED) return UNSIGNED is constant L_LENGTH: NATURAL := MAX(UNSIGNED_NUM_BITS(L), R'LENGTH); variable XL, XREM: UNSIGNED(L_LENGTH-1 downto 0); begin if (R'LENGTH < 1) then return NAU; end if; XL := TO_UNSIGNED(L, L_LENGTH); XREM := RESIZE((XL mod R), XREM'LENGTH); if L_LENGTH > R'LENGTH and XREM(0)/='X' and XREM(L_LENGTH-1 downto R'LENGTH) /= (L_LENGTH-1 downto R'LENGTH => '0') then assert NO_WARNING report "NUMERIC_STD.""mod"": Modulus Truncated" severity WARNING; end if; return RESIZE(XREM, R'LENGTH); end "mod"; -- Id: A.37 function "mod" (L: SIGNED; R: INTEGER) return SIGNED is constant R_LENGTH: NATURAL := MAX(L'LENGTH, SIGNED_NUM_BITS(R)); variable XR, XREM: SIGNED(R_LENGTH-1 downto 0); begin if (L'LENGTH < 1) then return NAS; end if; XR := TO_SIGNED(R, R_LENGTH); XREM := RESIZE((L mod XR), XREM'LENGTH); if R_LENGTH > L'LENGTH and XREM(0)/='X' and XREM(R_LENGTH-1 downto L'LENGTH) /= (R_LENGTH-1 downto L'LENGTH => XREM(L'LENGTH-1)) then assert NO_WARNING report "NUMERIC_STD.""mod"": Modulus Truncated" severity WARNING; end if; return RESIZE(XREM, L'LENGTH); end "mod"; -- Id: A.38 function "mod" (L: INTEGER; R: SIGNED) return SIGNED is constant L_LENGTH: NATURAL := MAX(SIGNED_NUM_BITS(L), R'LENGTH); variable XL, XREM: SIGNED(L_LENGTH-1 downto 0); begin if (R'LENGTH < 1) then return NAS; end if; XL := TO_SIGNED(L, L_LENGTH); XREM := RESIZE((XL mod R), XREM'LENGTH); if L_LENGTH > R'LENGTH and XREM(0)/='X' and XREM(L_LENGTH-1 downto R'LENGTH) /= (L_LENGTH-1 downto R'LENGTH => XREM(R'LENGTH-1)) then assert NO_WARNING report "NUMERIC_STD.""mod"": Modulus Truncated" severity WARNING; end if; return RESIZE(XREM, R'LENGTH); end "mod"; --============================================================================ -- Id: C.1 function ">" (L, R: UNSIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : UNSIGNED(L_LEFT downto 0); variable R01 : UNSIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD."">"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD."">"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return not UNSIGNED_LESS_OR_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end ">"; -- Id: C.2 function ">" (L, R: SIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : SIGNED(L_LEFT downto 0); variable R01 : SIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD."">"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD."">"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return not SIGNED_LESS_OR_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end ">"; -- Id: C.3 function ">" (L: NATURAL; R: UNSIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: UNSIGNED(R_LEFT downto 0) is R; variable R01 : UNSIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(L) > R'LENGTH then return TRUE; end if; return not UNSIGNED_LESS_OR_EQUAL(TO_UNSIGNED(L, R01'LENGTH), R01); end ">"; -- Id: C.4 function ">" (L: INTEGER; R: SIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: SIGNED(R_LEFT downto 0) is R; variable R01 : SIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(L) > R'LENGTH then return L > 0; end if; return not SIGNED_LESS_OR_EQUAL(TO_SIGNED(L, R01'LENGTH), R01); end ">"; -- Id: C.5 function ">" (L: UNSIGNED; R: NATURAL) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; variable L01 : UNSIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(R) > L'LENGTH then return FALSE; end if; return not UNSIGNED_LESS_OR_EQUAL(L01, TO_UNSIGNED(R, L01'LENGTH)); end ">"; -- Id: C.6 function ">" (L: SIGNED; R: INTEGER) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; variable L01 : SIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(R) > L'LENGTH then return 0 > R; end if; return not SIGNED_LESS_OR_EQUAL(L01, TO_SIGNED(R, L01'LENGTH)); end ">"; --============================================================================ -- Id: C.7 function "<" (L, R: UNSIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : UNSIGNED(L_LEFT downto 0); variable R01 : UNSIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""<"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""<"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return UNSIGNED_LESS(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end "<"; -- Id: C.8 function "<" (L, R: SIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : SIGNED(L_LEFT downto 0); variable R01 : SIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""<"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""<"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return SIGNED_LESS(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end "<"; -- Id: C.9 function "<" (L: NATURAL; R: UNSIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: UNSIGNED(R_LEFT downto 0) is R; variable R01 : UNSIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""<"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(L) > R'LENGTH then return L < 0; end if; return UNSIGNED_LESS(TO_UNSIGNED(L, R01'LENGTH), R01); end "<"; -- Id: C.10 function "<" (L: INTEGER; R: SIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: SIGNED(R_LEFT downto 0) is R; variable R01 : SIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""<"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(L) > R'LENGTH then return L < 0; end if; return SIGNED_LESS(TO_SIGNED(L, R01'LENGTH), R01); end "<"; -- Id: C.11 function "<" (L: UNSIGNED; R: NATURAL) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; variable L01 : UNSIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""<"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(R) > L'LENGTH then return 0 < R; end if; return UNSIGNED_LESS(L01, TO_UNSIGNED(R, L01'LENGTH)); end "<"; -- Id: C.12 function "<" (L: SIGNED; R: INTEGER) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; variable L01 : SIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""<"": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<"": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(R) > L'LENGTH then return 0 < R; end if; return SIGNED_LESS(L01, TO_SIGNED(R, L01'LENGTH)); end "<"; --============================================================================ -- Id: C.13 function "<=" (L, R: UNSIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : UNSIGNED(L_LEFT downto 0); variable R01 : UNSIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""<="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""<="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return UNSIGNED_LESS_OR_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end "<="; -- Id: C.14 function "<=" (L, R: SIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : SIGNED(L_LEFT downto 0); variable R01 : SIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""<="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""<="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return SIGNED_LESS_OR_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end "<="; -- Id: C.15 function "<=" (L: NATURAL; R: UNSIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: UNSIGNED(R_LEFT downto 0) is R; variable R01 : UNSIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""<="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(L) > R'LENGTH then return L < 0; end if; return UNSIGNED_LESS_OR_EQUAL(TO_UNSIGNED(L, R01'LENGTH), R01); end "<="; -- Id: C.16 function "<=" (L: INTEGER; R: SIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: SIGNED(R_LEFT downto 0) is R; variable R01 : SIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""<="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(L) > R'LENGTH then return L < 0; end if; return SIGNED_LESS_OR_EQUAL(TO_SIGNED(L, R01'LENGTH), R01); end "<="; -- Id: C.17 function "<=" (L: UNSIGNED; R: NATURAL) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; variable L01 : UNSIGNED(L_LEFT downto 0); begin if (L_LEFT < 0) then assert NO_WARNING report "NUMERIC_STD.""<="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(R) > L'LENGTH then return 0 < R; end if; return UNSIGNED_LESS_OR_EQUAL(L01, TO_UNSIGNED(R, L01'LENGTH)); end "<="; -- Id: C.18 function "<=" (L: SIGNED; R: INTEGER) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; variable L01 : SIGNED(L_LEFT downto 0); begin if (L_LEFT < 0) then assert NO_WARNING report "NUMERIC_STD.""<="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""<="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(R) > L'LENGTH then return 0 < R; end if; return SIGNED_LESS_OR_EQUAL(L01, TO_SIGNED(R, L01'LENGTH)); end "<="; --============================================================================ -- Id: C.19 function ">=" (L, R: UNSIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : UNSIGNED(L_LEFT downto 0); variable R01 : UNSIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD."">="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD."">="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return not UNSIGNED_LESS(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end ">="; -- Id: C.20 function ">=" (L, R: SIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : SIGNED(L_LEFT downto 0); variable R01 : SIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD."">="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD."">="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return not SIGNED_LESS(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end ">="; -- Id: C.21 function ">=" (L: NATURAL; R: UNSIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: UNSIGNED(R_LEFT downto 0) is R; variable R01 : UNSIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(L) > R'LENGTH then return L > 0; end if; return not UNSIGNED_LESS(TO_UNSIGNED(L, R01'LENGTH), R01); end ">="; -- Id: C.22 function ">=" (L: INTEGER; R: SIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: SIGNED(R_LEFT downto 0) is R; variable R01 : SIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(L) > R'LENGTH then return L > 0; end if; return not SIGNED_LESS(TO_SIGNED(L, R01'LENGTH), R01); end ">="; -- Id: C.23 function ">=" (L: UNSIGNED; R: NATURAL) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; variable L01 : UNSIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(R) > L'LENGTH then return 0 > R; end if; return not UNSIGNED_LESS(L01, TO_UNSIGNED(R, L01'LENGTH)); end ">="; -- Id: C.24 function ">=" (L: SIGNED; R: INTEGER) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; variable L01 : SIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD."">="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD."">="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(R) > L'LENGTH then return 0 > R; end if; return not SIGNED_LESS(L01, TO_SIGNED(R, L01'LENGTH)); end ">="; --============================================================================ -- Id: C.25 function "=" (L, R: UNSIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : UNSIGNED(L_LEFT downto 0); variable R01 : UNSIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return UNSIGNED_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end "="; -- Id: C.26 function "=" (L, R: SIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : SIGNED(L_LEFT downto 0); variable R01 : SIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; return SIGNED_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE)); end "="; -- Id: C.27 function "=" (L: NATURAL; R: UNSIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: UNSIGNED(R_LEFT downto 0) is R; variable R01 : UNSIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(L) > R'LENGTH then return FALSE; end if; return UNSIGNED_EQUAL(TO_UNSIGNED(L, R01'LENGTH), R01); end "="; -- Id: C.28 function "=" (L: INTEGER; R: SIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: SIGNED(R_LEFT downto 0) is R; variable R01 : SIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(L) > R'LENGTH then return FALSE; end if; return SIGNED_EQUAL(TO_SIGNED(L, R01'LENGTH), R01); end "="; -- Id: C.29 function "=" (L: UNSIGNED; R: NATURAL) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; variable L01 : UNSIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if UNSIGNED_NUM_BITS(R) > L'LENGTH then return FALSE; end if; return UNSIGNED_EQUAL(L01, TO_UNSIGNED(R, L01'LENGTH)); end "="; -- Id: C.30 function "=" (L: SIGNED; R: INTEGER) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; variable L01 : SIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""="": null argument detected, returning FALSE" severity WARNING; return FALSE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""="": metavalue detected, returning FALSE" severity WARNING; return FALSE; end if; if SIGNED_NUM_BITS(R) > L'LENGTH then return FALSE; end if; return SIGNED_EQUAL(L01, TO_SIGNED(R, L01'LENGTH)); end "="; --============================================================================ -- Id: C.31 function "/=" (L, R: UNSIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; alias XR: UNSIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : UNSIGNED(L_LEFT downto 0); variable R01 : UNSIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""/="": null argument detected, returning TRUE" severity WARNING; return TRUE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""/="": metavalue detected, returning TRUE" severity WARNING; return TRUE; end if; return not(UNSIGNED_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE))); end "/="; -- Id: C.32 function "/=" (L, R: SIGNED) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; constant R_LEFT: INTEGER := R'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; alias XR: SIGNED(R_LEFT downto 0) is R; constant SIZE: NATURAL := MAX(L'LENGTH, R'LENGTH); variable L01 : SIGNED(L_LEFT downto 0); variable R01 : SIGNED(R_LEFT downto 0); begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.""/="": null argument detected, returning TRUE" severity WARNING; return TRUE; end if; L01 := TO_01(XL, 'X'); R01 := TO_01(XR, 'X'); if ((L01(L01'LEFT)='X') or (R01(R01'LEFT)='X')) then assert NO_WARNING report "NUMERIC_STD.""/="": metavalue detected, returning TRUE" severity WARNING; return TRUE; end if; return not(SIGNED_EQUAL(RESIZE(L01, SIZE), RESIZE(R01, SIZE))); end "/="; -- Id: C.33 function "/=" (L: NATURAL; R: UNSIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: UNSIGNED(R_LEFT downto 0) is R; variable R01 : UNSIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""/="": null argument detected, returning TRUE" severity WARNING; return TRUE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""/="": metavalue detected, returning TRUE" severity WARNING; return TRUE; end if; if UNSIGNED_NUM_BITS(L) > R'LENGTH then return TRUE; end if; return not(UNSIGNED_EQUAL(TO_UNSIGNED(L, R01'LENGTH), R01)); end "/="; -- Id: C.34 function "/=" (L: INTEGER; R: SIGNED) return BOOLEAN is constant R_LEFT: INTEGER := R'LENGTH-1; alias XR: SIGNED(R_LEFT downto 0) is R; variable R01 : SIGNED(R_LEFT downto 0); begin if (R'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""/="": null argument detected, returning TRUE" severity WARNING; return TRUE; end if; R01 := TO_01(XR, 'X'); if (R01(R01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""/="": metavalue detected, returning TRUE" severity WARNING; return TRUE; end if; if SIGNED_NUM_BITS(L) > R'LENGTH then return TRUE; end if; return not(SIGNED_EQUAL(TO_SIGNED(L, R01'LENGTH), R01)); end "/="; -- Id: C.35 function "/=" (L: UNSIGNED; R: NATURAL) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: UNSIGNED(L_LEFT downto 0) is L; variable L01 : UNSIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""/="": null argument detected, returning TRUE" severity WARNING; return TRUE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""/="": metavalue detected, returning TRUE" severity WARNING; return TRUE; end if; if UNSIGNED_NUM_BITS(R) > L'LENGTH then return TRUE; end if; return not(UNSIGNED_EQUAL(L01, TO_UNSIGNED(R, L01'LENGTH))); end "/="; -- Id: C.36 function "/=" (L: SIGNED; R: INTEGER) return BOOLEAN is constant L_LEFT: INTEGER := L'LENGTH-1; alias XL: SIGNED(L_LEFT downto 0) is L; variable L01 : SIGNED(L_LEFT downto 0); begin if (L'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.""/="": null argument detected, returning TRUE" severity WARNING; return TRUE; end if; L01 := TO_01(XL, 'X'); if (L01(L01'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.""/="": metavalue detected, returning TRUE" severity WARNING; return TRUE; end if; if SIGNED_NUM_BITS(R) > L'LENGTH then return TRUE; end if; return not(SIGNED_EQUAL(L01, TO_SIGNED(R, L01'LENGTH))); end "/="; --============================================================================ -- Id: S.1 function SHIFT_LEFT (ARG: UNSIGNED; COUNT: NATURAL) return UNSIGNED is begin if (ARG'LENGTH < 1) then return NAU; end if; return UNSIGNED(XSLL(STD_LOGIC_VECTOR(ARG), COUNT)); end SHIFT_LEFT; -- Id: S.2 function SHIFT_RIGHT (ARG: UNSIGNED; COUNT: NATURAL) return UNSIGNED is begin if (ARG'LENGTH < 1) then return NAU; end if; return UNSIGNED(XSRL(STD_LOGIC_VECTOR(ARG), COUNT)); end SHIFT_RIGHT; -- Id: S.3 function SHIFT_LEFT (ARG: SIGNED; COUNT: NATURAL) return SIGNED is begin if (ARG'LENGTH < 1) then return NAS; end if; return SIGNED(XSLL(STD_LOGIC_VECTOR(ARG), COUNT)); end SHIFT_LEFT; -- Id: S.4 function SHIFT_RIGHT (ARG: SIGNED; COUNT: NATURAL) return SIGNED is begin if (ARG'LENGTH < 1) then return NAS; end if; return SIGNED(XSRA(STD_LOGIC_VECTOR(ARG), COUNT)); end SHIFT_RIGHT; --============================================================================ -- Id: S.5 function ROTATE_LEFT (ARG: UNSIGNED; COUNT: NATURAL) return UNSIGNED is begin if (ARG'LENGTH < 1) then return NAU; end if; return UNSIGNED(XROL(STD_LOGIC_VECTOR(ARG), COUNT)); end ROTATE_LEFT; -- Id: S.6 function ROTATE_RIGHT (ARG: UNSIGNED; COUNT: NATURAL) return UNSIGNED is begin if (ARG'LENGTH < 1) then return NAU; end if; return UNSIGNED(XROR(STD_LOGIC_VECTOR(ARG), COUNT)); end ROTATE_RIGHT; -- Id: S.7 function ROTATE_LEFT (ARG: SIGNED; COUNT: NATURAL) return SIGNED is begin if (ARG'LENGTH < 1) then return NAS; end if; return SIGNED(XROL(STD_LOGIC_VECTOR(ARG), COUNT)); end ROTATE_LEFT; -- Id: S.8 function ROTATE_RIGHT (ARG: SIGNED; COUNT: NATURAL) return SIGNED is begin if (ARG'LENGTH < 1) then return NAS; end if; return SIGNED(XROR(STD_LOGIC_VECTOR(ARG), COUNT)); end ROTATE_RIGHT; --============================================================================ --START-!V87 ------------------------------------------------------------------------------ -- Note : Function S.9 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.9 function "sll" (ARG: UNSIGNED; COUNT: INTEGER) return UNSIGNED is begin if (COUNT >= 0) then return SHIFT_LEFT(ARG, COUNT); else return SHIFT_RIGHT(ARG, -COUNT); end if; end "sll"; ------------------------------------------------------------------------------ -- Note : Function S.10 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.10 function "sll" (ARG: SIGNED; COUNT: INTEGER) return SIGNED is begin if (COUNT >= 0) then return SHIFT_LEFT(ARG, COUNT); else return SIGNED(SHIFT_RIGHT(UNSIGNED(ARG), -COUNT)); end if; end "sll"; ------------------------------------------------------------------------------ -- Note : Function S.11 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.11 function "srl" (ARG: UNSIGNED; COUNT: INTEGER) return UNSIGNED is begin if (COUNT >= 0) then return SHIFT_RIGHT(ARG, COUNT); else return SHIFT_LEFT(ARG, -COUNT); end if; end "srl"; ------------------------------------------------------------------------------ -- Note : Function S.12 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.12 function "srl" (ARG: SIGNED; COUNT: INTEGER) return SIGNED is begin if (COUNT >= 0) then return SIGNED(SHIFT_RIGHT(UNSIGNED(ARG), COUNT)); else return SHIFT_LEFT(ARG, -COUNT); end if; end "srl"; ------------------------------------------------------------------------------ -- Note : Function S.13 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.13 function "rol" (ARG: UNSIGNED; COUNT: INTEGER) return UNSIGNED is begin if (COUNT >= 0) then return ROTATE_LEFT(ARG, COUNT); else return ROTATE_RIGHT(ARG, -COUNT); end if; end "rol"; ------------------------------------------------------------------------------ -- Note : Function S.14 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.14 function "rol" (ARG: SIGNED; COUNT: INTEGER) return SIGNED is begin if (COUNT >= 0) then return ROTATE_LEFT(ARG, COUNT); else return ROTATE_RIGHT(ARG, -COUNT); end if; end "rol"; ------------------------------------------------------------------------------ -- Note : Function S.15 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.15 function "ror" (ARG: UNSIGNED; COUNT: INTEGER) return UNSIGNED is begin if (COUNT >= 0) then return ROTATE_RIGHT(ARG, COUNT); else return ROTATE_LEFT(ARG, -COUNT); end if; end "ror"; ------------------------------------------------------------------------------ -- Note : Function S.16 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: S.16 function "ror" (ARG: SIGNED; COUNT: INTEGER) return SIGNED is begin if (COUNT >= 0) then return ROTATE_RIGHT(ARG, COUNT); else return ROTATE_LEFT(ARG, -COUNT); end if; end "ror"; --END-!V87 --============================================================================ -- Id: D.1 function TO_INTEGER (ARG: UNSIGNED) return NATURAL is constant ARG_LEFT: INTEGER := ARG'LENGTH-1; alias XXARG: UNSIGNED(ARG_LEFT downto 0) is ARG; variable XARG: UNSIGNED(ARG_LEFT downto 0); variable RESULT: NATURAL := 0; begin if (ARG'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.TO_INTEGER: null detected, returning 0" severity WARNING; return 0; end if; XARG := TO_01(XXARG, 'X'); if (XARG(XARG'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.TO_INTEGER: metavalue detected, returning 0" severity WARNING; return 0; end if; for I in XARG'RANGE loop RESULT := RESULT+RESULT; if XARG(I) = '1' then RESULT := RESULT + 1; end if; end loop; return RESULT; end TO_INTEGER; -- Id: D.2 function TO_INTEGER (ARG: SIGNED) return INTEGER is variable XARG: SIGNED(ARG'LENGTH-1 downto 0); begin if (ARG'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.TO_INTEGER: null detected, returning 0" severity WARNING; return 0; end if; XARG := TO_01(ARG, 'X'); if (XARG(XARG'LEFT)='X') then assert NO_WARNING report "NUMERIC_STD.TO_INTEGER: metavalue detected, returning 0" severity WARNING; return 0; end if; if XARG(XARG'LEFT) = '0' then return TO_INTEGER(UNSIGNED(XARG)); else return (- (TO_INTEGER(UNSIGNED(- (XARG + 1)))) -1); end if; end TO_INTEGER; -- Id: D.3 function TO_UNSIGNED (ARG, SIZE: NATURAL) return UNSIGNED is variable RESULT: UNSIGNED(SIZE-1 downto 0); variable I_VAL: NATURAL := ARG; begin if (SIZE < 1) then return NAU; end if; for I in 0 to RESULT'LEFT loop if (I_VAL mod 2) = 0 then RESULT(I) := '0'; else RESULT(I) := '1'; end if; I_VAL := I_VAL/2; end loop; if not(I_VAL =0) then assert NO_WARNING report "NUMERIC_STD.TO_UNSIGNED: vector truncated" severity WARNING; end if; return RESULT; end TO_UNSIGNED; -- Id: D.4 function TO_SIGNED (ARG: INTEGER; SIZE: NATURAL) return SIGNED is variable RESULT: SIGNED(SIZE-1 downto 0); variable B_VAL: STD_LOGIC := '0'; variable I_VAL: INTEGER := ARG; begin if (SIZE < 1) then return NAS; end if; if (ARG < 0) then B_VAL := '1'; I_VAL := -(ARG+1); end if; for I in 0 to RESULT'LEFT loop if (I_VAL mod 2) = 0 then RESULT(I) := B_VAL; else RESULT(I) := not B_VAL; end if; I_VAL := I_VAL/2; end loop; if ((I_VAL/=0) or (B_VAL/=RESULT(RESULT'LEFT))) then assert NO_WARNING report "NUMERIC_STD.TO_SIGNED: vector truncated" severity WARNING; end if; return RESULT; end TO_SIGNED; --============================================================================ -- Id: R.1 function RESIZE (ARG: SIGNED; NEW_SIZE: NATURAL) return SIGNED is alias INVEC: SIGNED(ARG'LENGTH-1 downto 0) is ARG; variable RESULT: SIGNED(NEW_SIZE-1 downto 0) := (others => '0'); constant BOUND: INTEGER := MIN(ARG'LENGTH, RESULT'LENGTH)-2; begin if (NEW_SIZE < 1) then return NAS; end if; if (ARG'LENGTH = 0) then return RESULT; end if; RESULT := (others => ARG(ARG'LEFT)); if BOUND >= 0 then RESULT(BOUND downto 0) := INVEC(BOUND downto 0); end if; return RESULT; end RESIZE; -- Id: R.2 function RESIZE (ARG: UNSIGNED; NEW_SIZE: NATURAL) return UNSIGNED is constant ARG_LEFT: INTEGER := ARG'LENGTH-1; alias XARG: UNSIGNED(ARG_LEFT downto 0) is ARG; variable RESULT: UNSIGNED(NEW_SIZE-1 downto 0) := (others => '0'); begin if (NEW_SIZE < 1) then return NAU; end if; if XARG'LENGTH =0 then return RESULT; end if; if (RESULT'LENGTH < ARG'LENGTH) then RESULT(RESULT'LEFT downto 0) := XARG(RESULT'LEFT downto 0); else RESULT(RESULT'LEFT downto XARG'LEFT+1) := (others => '0'); RESULT(XARG'LEFT downto 0) := XARG; end if; return RESULT; end RESIZE; --============================================================================ -- Id: L.1 function "not" (L: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(not(STD_LOGIC_VECTOR(L))); return RESULT; end "not"; -- Id: L.2 function "and" (L, R: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(STD_LOGIC_VECTOR(L) and STD_LOGIC_VECTOR(R)); return RESULT; end "and"; -- Id: L.3 function "or" (L, R: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(STD_LOGIC_VECTOR(L) or STD_LOGIC_VECTOR(R)); return RESULT; end "or"; -- Id: L.4 function "nand" (L, R: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(STD_LOGIC_VECTOR(L) nand STD_LOGIC_VECTOR(R)); return RESULT; end "nand"; -- Id: L.5 function "nor" (L, R: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(STD_LOGIC_VECTOR(L) nor STD_LOGIC_VECTOR(R)); return RESULT; end "nor"; -- Id: L.6 function "xor" (L, R: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(STD_LOGIC_VECTOR(L) xor STD_LOGIC_VECTOR(R)); return RESULT; end "xor"; --START-!V87 ------------------------------------------------------------------------------ -- Note : Function L.7 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: L.7 function "xnor" (L, R: UNSIGNED) return UNSIGNED is variable RESULT: UNSIGNED(L'LENGTH-1 downto 0); begin RESULT := UNSIGNED(STD_LOGIC_VECTOR(L) xnor STD_LOGIC_VECTOR(R)); return RESULT; end "xnor"; --END-!V87 -- Id: L.8 function "not" (L: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(not(STD_LOGIC_VECTOR(L))); return RESULT; end "not"; -- Id: L.9 function "and" (L, R: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(STD_LOGIC_VECTOR(L) and STD_LOGIC_VECTOR(R)); return RESULT; end "and"; -- Id: L.10 function "or" (L, R: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(STD_LOGIC_VECTOR(L) or STD_LOGIC_VECTOR(R)); return RESULT; end "or"; -- Id: L.11 function "nand" (L, R: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(STD_LOGIC_VECTOR(L) nand STD_LOGIC_VECTOR(R)); return RESULT; end "nand"; -- Id: L.12 function "nor" (L, R: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(STD_LOGIC_VECTOR(L) nor STD_LOGIC_VECTOR(R)); return RESULT; end "nor"; -- Id: L.13 function "xor" (L, R: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(STD_LOGIC_VECTOR(L) xor STD_LOGIC_VECTOR(R)); return RESULT; end "xor"; --START-!V87 ------------------------------------------------------------------------------ -- Note : Function L.14 is not compatible with VHDL 1076-1987. Comment -- out the function (declaration and body) for VHDL 1076-1987 compatibility. ------------------------------------------------------------------------------ -- Id: L.14 function "xnor" (L, R: SIGNED) return SIGNED is variable RESULT: SIGNED(L'LENGTH-1 downto 0); begin RESULT := SIGNED(STD_LOGIC_VECTOR(L) xnor STD_LOGIC_VECTOR(R)); return RESULT; end "xnor"; --END-!V87 --============================================================================ -- support constants for STD_MATCH: type BOOLEAN_TABLE is array(STD_ULOGIC, STD_ULOGIC) of BOOLEAN; constant MATCH_TABLE: BOOLEAN_TABLE := ( -------------------------------------------------------------------------- -- U X 0 1 Z W L H - -------------------------------------------------------------------------- (FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE), -- | U | (FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE), -- | X | (FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, FALSE, TRUE), -- | 0 | (FALSE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, TRUE), -- | 1 | (FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE), -- | Z | (FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE), -- | W | (FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, FALSE, TRUE), -- | L | (FALSE, FALSE, FALSE, TRUE, FALSE, FALSE, FALSE, TRUE, TRUE), -- | H | ( TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE) -- | - | ); -- Id: M.1 function STD_MATCH (L, R: STD_ULOGIC) return BOOLEAN is variable VALUE: STD_ULOGIC; begin return MATCH_TABLE(L, R); end STD_MATCH; -- Id: M.2 function STD_MATCH (L, R: UNSIGNED) return BOOLEAN is alias LV: UNSIGNED(1 to L'LENGTH) is L; alias RV: UNSIGNED(1 to R'LENGTH) is R; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: null detected, returning FALSE" severity WARNING; return FALSE; end if; if LV'LENGTH /= RV'LENGTH then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: L'LENGTH /= R'LENGTH, returning FALSE" severity WARNING; return FALSE; else for I in LV'LOW to LV'HIGH loop if not (MATCH_TABLE(LV(I), RV(I))) then return FALSE; end if; end loop; return TRUE; end if; end STD_MATCH; -- Id: M.3 function STD_MATCH (L, R: SIGNED) return BOOLEAN is alias LV: SIGNED(1 to L'LENGTH) is L; alias RV: SIGNED(1 to R'LENGTH) is R; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: null detected, returning FALSE" severity WARNING; return FALSE; end if; if LV'LENGTH /= RV'LENGTH then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: L'LENGTH /= R'LENGTH, returning FALSE" severity WARNING; return FALSE; else for I in LV'LOW to LV'HIGH loop if not (MATCH_TABLE(LV(I), RV(I))) then return FALSE; end if; end loop; return TRUE; end if; end STD_MATCH; -- Id: M.4 function STD_MATCH (L, R: STD_LOGIC_VECTOR) return BOOLEAN is alias LV: STD_LOGIC_VECTOR(1 to L'LENGTH) is L; alias RV: STD_LOGIC_VECTOR(1 to R'LENGTH) is R; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: null detected, returning FALSE" severity WARNING; return FALSE; end if; if LV'LENGTH /= RV'LENGTH then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: L'LENGTH /= R'LENGTH, returning FALSE" severity WARNING; return FALSE; else for I in LV'LOW to LV'HIGH loop if not (MATCH_TABLE(LV(I), RV(I))) then return FALSE; end if; end loop; return TRUE; end if; end STD_MATCH; -- Id: M.5 function STD_MATCH (L, R: STD_ULOGIC_VECTOR) return BOOLEAN is alias LV: STD_ULOGIC_VECTOR(1 to L'LENGTH) is L; alias RV: STD_ULOGIC_VECTOR(1 to R'LENGTH) is R; begin if ((L'LENGTH < 1) or (R'LENGTH < 1)) then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: null detected, returning FALSE" severity WARNING; return FALSE; end if; if LV'LENGTH /= RV'LENGTH then assert NO_WARNING report "NUMERIC_STD.STD_MATCH: L'LENGTH /= R'LENGTH, returning FALSE" severity WARNING; return FALSE; else for I in LV'LOW to LV'HIGH loop if not (MATCH_TABLE(LV(I), RV(I))) then return FALSE; end if; end loop; return TRUE; end if; end STD_MATCH; --============================================================================ -- function TO_01 is used to convert vectors to the -- correct form for exported functions, -- and to report if there is an element which -- is not in (0, 1, H, L). -- Id: T.1 function TO_01 (S: UNSIGNED; XMAP: STD_LOGIC := '0') return UNSIGNED is variable RESULT: UNSIGNED(S'LENGTH-1 downto 0); variable BAD_ELEMENT: BOOLEAN := FALSE; alias XS: UNSIGNED(S'LENGTH-1 downto 0) is S; begin if (S'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.TO_01: null detected, returning NAU" severity WARNING; return NAU; end if; for I in RESULT'RANGE loop case XS(I) is when '0' | 'L' => RESULT(I) := '0'; when '1' | 'H' => RESULT(I) := '1'; when others => BAD_ELEMENT := TRUE; end case; end loop; if BAD_ELEMENT then for I in RESULT'RANGE loop RESULT(I) := XMAP; -- standard fixup end loop; end if; return RESULT; end TO_01; -- Id: T.2 function TO_01 (S: SIGNED; XMAP: STD_LOGIC := '0') return SIGNED is variable RESULT: SIGNED(S'LENGTH-1 downto 0); variable BAD_ELEMENT: BOOLEAN := FALSE; alias XS: SIGNED(S'LENGTH-1 downto 0) is S; begin if (S'LENGTH < 1) then assert NO_WARNING report "NUMERIC_STD.TO_01: null detected, returning NAS" severity WARNING; return NAS; end if; for I in RESULT'RANGE loop case XS(I) is when '0' | 'L' => RESULT(I) := '0'; when '1' | 'H' => RESULT(I) := '1'; when others => BAD_ELEMENT := TRUE; end case; end loop; if BAD_ELEMENT then for I in RESULT'RANGE loop RESULT(I) := XMAP; -- standard fixup end loop; end if; return RESULT; end TO_01; --============================================================================ end NUMERIC_STD;