// This file is dual licensed under the terms of the Apache License, Version
// 2.0, and the BSD License. See the LICENSE file in the root of this
// repository for complete details.
uint8_t Cryptography_constant_time_bytes_eq(uint8_t *a, size_t len_a,
uint8_t *b, size_t len_b) {
size_t i = 0;
uint8_t mismatch = 0;
if (len_a != len_b) {
return 0;
}
for (i = 0; i < len_a; i++) {
mismatch |= a[i] ^ b[i];
}
/* Make sure any bits set are copied to the lowest bit */
mismatch |= mismatch >> 4;
mismatch |= mismatch >> 2;
mismatch |= mismatch >> 1;
/* Now check the low bit to see if it's set */
return (mismatch & 1) == 0;
- parameter integer INMODEREG = 1;
- parameter integer MREG = 1;
- parameter integer OPMODEREG = 1;
- parameter integer PREG = 1;
- parameter SEL_MASK = "MASK";
- parameter SEL_PATTERN = "PATTERN";
- parameter USE_DPORT = "FALSE";
- parameter USE_MULT = "MULTIPLY";
- parameter USE_PATTERN_DETECT = "NO_PATDET";
- parameter USE_SIMD = "ONE48";
- parameter [47:0] MASK = 48'h3FFFFFFFFFFF;
- parameter [47:0] PATTERN = 48'h000000000000;
- parameter [3:0] IS_ALUMODE_INVERTED = 4'b0;
- parameter [0:0] IS_CARRYIN_INVERTED = 1'b0;
- parameter [0:0] IS_CLK_INVERTED = 1'b0;
- parameter [4:0] IS_INMODE_INVERTED = 5'b0;
- parameter [6:0] IS_OPMODE_INVERTED = 7'b0;
-
- DSP48E1 #(
- .ACASCREG(ACASCREG),
- .ADREG(ADREG),
- .ALUMODEREG(ALUMODEREG),
- .AREG(AREG),
- .AUTORESET_PATDET(AUTORESET_PATDET),
- .A_INPUT(A_INPUT),
- .BCASCREG(BCASCREG),
- .BREG(BREG),
- .B_INPUT(B_INPUT),
- .CARRYINREG(CARRYINREG),
- .CARRYINSELREG(CARRYINSELREG),
- .CREG(CREG),
- .DREG(DREG),
- .INMODEREG(INMODEREG),
- .MREG(MREG),
- .OPMODEREG(OPMODEREG),
- .PREG(PREG),
- .SEL_MASK(SEL_MASK),
- .SEL_PATTERN(SEL_PATTERN),
- .USE_DPORT(USE_DPORT),
- .USE_MULT(USE_MULT),
- .USE_PATTERN_DETECT(USE_PATTERN_DETECT),
- .USE_SIMD(USE_SIMD),
- .MASK(MASK),
- .PATTERN(PATTERN),
- .IS_ALUMODE_INVERTED(IS_ALUMODE_INVERTED),
- .IS_CARRYIN_INVERTED(IS_CARRYIN_INVERTED),
- .IS_CLK_INVERTED(IS_CLK_INVERTED),
- .IS_INMODE_INVERTED(IS_INMODE_INVERTED),
- .IS_OPMODE_INVERTED(IS_OPMODE_INVERTED)
- ) _TECHMAP_REPLACE_ (
- .ACOUT(ACOUT),
- .BCOUT(BCOUT),
- .CARRYCASCOUT(CARRYCASCOUT),
- .CARRYOUT(CARRYOUT),
- .MULTSIGNOUT(MULTSIGNOUT),
- .OVERFLOW(OVERFLOW),
- .P(P),
- .PATTERNBDETECT(PATTERNBDETECT),
- .PATTERNDETECT(PATTERNDETECT),
- .PCOUT(PCOUT),
- .UNDERFLOW(UNDERFLOW),
- .A(A),
- .ACIN(ACIN),
- .ALUMODE(ALUMODE),
- .B(B),
- .BCIN(BCIN),
- .C(C),
- .CARRYCASCIN(CARRYCASCIN),
- .CARRYIN(CARRYIN),
- .CARRYINSEL(CARRYINSEL),
- .CEA1(CEA1),
- .CEA2(CEA2),
- .CEAD(CEAD),
- .CEALUMODE(CEALUMODE),
- .CEB1(CEB1),
- .CEB2(CEB2),
- .CEC(CEC),
- .CECARRYIN(CECARRYIN),
- .CECTRL(CECTRL),
- .CED(CED),
- .CEINMODE(CEINMODE),
- .CEM(CEM),
- .CEP(CEP),
- .CLK(CLK),
- .D(D),
- .INMODE(INMODE),
- .MULTSIGNIN(MULTSIGNIN),
- .OPMODE(OPMODE),
- .PCIN(PCIN),
- .RSTA(RSTA),
- .RSTALLCARRYIN(RSTALLCARRYIN),
- .RSTALUMODE(RSTALUMODE),
- .RSTB(RSTB),
- .RSTC(RSTC),
- .RSTCTRL(RSTCTRL),
- .RSTD(RSTD),
- .RSTINMODE(RSTINMODE),
- .RSTM(RSTM),
- .RSTP(RSTP)
- );
+ assign P = $P, PCOUT = $PCOUT;
endmodule
