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77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
#include "ec_base_vsx.h"
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/*
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* Same as gf_vect_mul_base in "ec_base.h" but without the size restriction.
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*/
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static void
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_gf_vect_mul_base(int len, unsigned char *a, unsigned char *src, unsigned char *dest)
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{
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// 2nd element of table array is ref value used to fill it in
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unsigned char c = a[1];
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while (len-- > 0)
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*dest++ = gf_mul(c, *src++);
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return;
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}
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void
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gf_vect_mul_vsx(int len, unsigned char *gftbl, unsigned char *src, unsigned char *dest)
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{
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unsigned char *s, *t0;
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vector unsigned char vX1, vY1;
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vector unsigned char vX2, vY2;
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vector unsigned char vX3, vY3;
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vector unsigned char vX4, vY4;
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vector unsigned char vX5, vY5;
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vector unsigned char vX6, vY6;
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vector unsigned char vX7, vY7;
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vector unsigned char vX8, vY8;
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vector unsigned char vhi0, vlo0;
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int i, head;
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s = (unsigned char *) src;
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t0 = (unsigned char *) dest;
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head = len % 128;
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if (head != 0) {
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_gf_vect_mul_base(head, gftbl, src, dest);
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}
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vlo0 = EC_vec_xl(0, gftbl);
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vhi0 = EC_vec_xl(16, gftbl);
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for (i = head; i < len - 127; i += 128) {
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vX1 = vec_xl(0, s + i);
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vX2 = vec_xl(16, s + i);
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vX3 = vec_xl(32, s + i);
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vX4 = vec_xl(48, s + i);
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vX5 = vec_xl(64, s + i);
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vX6 = vec_xl(80, s + i);
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vX7 = vec_xl(96, s + i);
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vX8 = vec_xl(112, s + i);
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vY1 = EC_vec_permxor(vhi0, vlo0, vX1);
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vY2 = EC_vec_permxor(vhi0, vlo0, vX2);
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vY3 = EC_vec_permxor(vhi0, vlo0, vX3);
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vY4 = EC_vec_permxor(vhi0, vlo0, vX4);
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vY5 = EC_vec_permxor(vhi0, vlo0, vX5);
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vY6 = EC_vec_permxor(vhi0, vlo0, vX6);
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vY7 = EC_vec_permxor(vhi0, vlo0, vX7);
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vY8 = EC_vec_permxor(vhi0, vlo0, vX8);
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vec_xst(vY1, 0, t0 + i);
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vec_xst(vY2, 16, t0 + i);
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vec_xst(vY3, 32, t0 + i);
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vec_xst(vY4, 48, t0 + i);
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vec_xst(vY5, 64, t0 + i);
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vec_xst(vY6, 80, t0 + i);
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vec_xst(vY7, 96, t0 + i);
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vec_xst(vY8, 112, t0 + i);
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}
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return;
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}
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