mirror of
https://github.com/henrydcase/pqc.git
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b3f9d4f8d6
* 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
68 lines
1.4 KiB
C
68 lines
1.4 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 "params.h"
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void PQCLEAN_MCELIECE6688128_CLEAN_store2(unsigned char *dest, gf 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_MCELIECE6688128_CLEAN_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_MCELIECE6688128_CLEAN_load4(const unsigned char *in) {
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int i;
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uint32_t ret = in[3];
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for (i = 2; 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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void PQCLEAN_MCELIECE6688128_CLEAN_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_MCELIECE6688128_CLEAN_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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gf PQCLEAN_MCELIECE6688128_CLEAN_bitrev(gf a) {
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a = ((a & 0x00FF) << 8) | ((a & 0xFF00) >> 8);
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a = ((a & 0x0F0F) << 4) | ((a & 0xF0F0) >> 4);
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a = ((a & 0x3333) << 2) | ((a & 0xCCCC) >> 2);
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a = ((a & 0x5555) << 1) | ((a & 0xAAAA) >> 1);
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return a >> 3;
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}
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