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58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
#include "fe.h"
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/*
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h = f - g
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Can overlap h with f or g.
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Preconditions:
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|f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
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|g| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
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Postconditions:
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|h| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
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*/
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void fe_sub(fe h,const fe f,const fe g)
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{
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crypto_int32 f0 = f[0];
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crypto_int32 f1 = f[1];
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crypto_int32 f2 = f[2];
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crypto_int32 f3 = f[3];
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crypto_int32 f4 = f[4];
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crypto_int32 f5 = f[5];
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crypto_int32 f6 = f[6];
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crypto_int32 f7 = f[7];
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crypto_int32 f8 = f[8];
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crypto_int32 f9 = f[9];
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crypto_int32 g0 = g[0];
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crypto_int32 g1 = g[1];
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crypto_int32 g2 = g[2];
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crypto_int32 g3 = g[3];
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crypto_int32 g4 = g[4];
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crypto_int32 g5 = g[5];
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crypto_int32 g6 = g[6];
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crypto_int32 g7 = g[7];
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crypto_int32 g8 = g[8];
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crypto_int32 g9 = g[9];
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crypto_int32 h0 = f0 - g0;
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crypto_int32 h1 = f1 - g1;
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crypto_int32 h2 = f2 - g2;
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crypto_int32 h3 = f3 - g3;
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crypto_int32 h4 = f4 - g4;
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crypto_int32 h5 = f5 - g5;
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crypto_int32 h6 = f6 - g6;
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crypto_int32 h7 = f7 - g7;
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crypto_int32 h8 = f8 - g8;
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crypto_int32 h9 = f9 - g9;
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h[0] = h0;
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h[1] = h1;
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h[2] = h2;
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h[3] = h3;
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h[4] = h4;
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h[5] = h5;
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h[6] = h6;
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h[7] = h7;
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h[8] = h8;
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h[9] = h9;
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}
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