mirror of
https://github.com/henrydcase/pqc.git
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ac2c20045c
* Add McEliece reference implementations * Add Vec implementations of McEliece * Add sse implementations * Add AVX2 implementations * Get rid of stuff not supported by Mac ABI * restrict to two cores * Ditch .data files * Remove .hidden from all .S files * speed up duplicate consistency tests by batching * make cpuinfo more robust * Hope to stabilize macos cpuinfo without ccache * Revert "Hope to stabilize macos cpuinfo without ccache" This reverts commit 6129c3cabe1abbc8b956bc87e902a698e32bf322. * Just hardcode what's available at travis * Fixed-size types in api.h * namespace all header files in mceliece * Ditch operations.h * Get rid of static inline functions * fixup! Ditch operations.h
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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This file is for loading/storing data in a little-endian fashion
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*/
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#include "util.h"
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#include "vec128.h"
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#include <stdint.h>
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void PQCLEAN_MCELIECE6688128F_SSE_store_i(unsigned char *out, uint64_t in, int i) {
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int j;
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for (j = 0; j < i; j++) {
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out[j] = (in >> (j * 8)) & 0xFF;
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}
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}
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void PQCLEAN_MCELIECE6688128F_SSE_store2(unsigned char *dest, uint16_t a) {
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dest[0] = a & 0xFF;
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dest[1] = a >> 8;
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}
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uint16_t PQCLEAN_MCELIECE6688128F_SSE_load2(const unsigned char *src) {
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uint16_t a;
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a = src[1];
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a <<= 8;
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a |= src[0];
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return a & GFMASK;
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}
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uint32_t PQCLEAN_MCELIECE6688128F_SSE_load4(const unsigned char *src) {
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uint32_t a;
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a = src[3];
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a <<= 8;
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a |= src[2];
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a <<= 8;
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a |= src[1];
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a <<= 8;
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a |= src[0];
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return a;
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}
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void PQCLEAN_MCELIECE6688128F_SSE_irr_load(vec128 *out, const unsigned char *in) {
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int i, j;
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uint64_t v[2];
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uint16_t irr[ SYS_T + 1 ];
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for (i = 0; i < SYS_T; i++) {
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irr[i] = PQCLEAN_MCELIECE6688128F_SSE_load2(in + i * 2);
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irr[i] &= GFMASK;
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}
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irr[ SYS_T ] = 1;
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for (i = 0; i < GFBITS; i++) {
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v[0] = v[1] = 0;
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for (j = 63; j >= 0; j--) {
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v[0] <<= 1;
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v[0] |= (irr[j] >> i) & 1;
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}
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for (j = SYS_T; j >= 64; j--) {
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v[1] <<= 1;
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v[1] |= (irr[j] >> i) & 1;
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}
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out[i] = PQCLEAN_MCELIECE6688128F_SSE_vec128_set2x(v[0], v[1]);
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}
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}
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void PQCLEAN_MCELIECE6688128F_SSE_store8(unsigned char *out, uint64_t in) {
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out[0] = (in >> 0x00) & 0xFF;
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out[1] = (in >> 0x08) & 0xFF;
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out[2] = (in >> 0x10) & 0xFF;
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out[3] = (in >> 0x18) & 0xFF;
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out[4] = (in >> 0x20) & 0xFF;
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out[5] = (in >> 0x28) & 0xFF;
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out[6] = (in >> 0x30) & 0xFF;
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out[7] = (in >> 0x38) & 0xFF;
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}
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uint64_t PQCLEAN_MCELIECE6688128F_SSE_load8(const unsigned char *in) {
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int i;
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uint64_t ret = in[7];
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for (i = 6; i >= 0; i--) {
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ret <<= 8;
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ret |= in[i];
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}
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return ret;
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}
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vec128 PQCLEAN_MCELIECE6688128F_SSE_load16(const unsigned char *in) {
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return PQCLEAN_MCELIECE6688128F_SSE_vec128_set2x( PQCLEAN_MCELIECE6688128F_SSE_load8(in), PQCLEAN_MCELIECE6688128F_SSE_load8(in + 8) );
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}
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void PQCLEAN_MCELIECE6688128F_SSE_store16(unsigned char *out, vec128 in) {
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PQCLEAN_MCELIECE6688128F_SSE_store8(out + 0, PQCLEAN_MCELIECE6688128F_SSE_vec128_extract(in, 0));
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PQCLEAN_MCELIECE6688128F_SSE_store8(out + 8, PQCLEAN_MCELIECE6688128F_SSE_vec128_extract(in, 1));
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}
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