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fix(sm2): fix ENABLE_SM2_NEON macro mismatch and add missing functions

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Problems:
1. CMakeLists.txt defines -DENABLE_SM2_NEON but sm2_z256.c checks
   for ENABLE_SM2_Z256_NEON, causing NEON code path never taken
2. When NEON is enabled, sm2_z256_modp_mont_sqr, sm2_z256_modp_from_mont,
   and sm2_z256_modp_to_mont are missing due to #elif structure

Fixes:
1. Change add_definitions(-DENABLE_SM2_NEON) to
   add_definitions(-DENABLE_SM2_Z256_NEON) in CMakeLists.txt
2. Add the three missing wrapper functions in NEON code block
This commit is contained in:
libo
2026-02-02 15:02:55 +08:00
parent e0f5ed85e3
commit 0299af5667
2 changed files with 23 additions and 1 deletions
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2
CMakeLists.txt
View File

@@ -281,7 +281,7 @@ endif()
if (ENABLE_SM2_NEON)
message(STATUS "ENABLE_SM2_NEON is ON")
add_definitions(-DENABLE_SM2_NEON)
add_definitions(-DENABLE_SM2_Z256_NEON)
endif()
if (ENABLE_SM9_ARM64)

22
src/sm2_z256.c
View File

@@ -596,6 +596,28 @@ void sm2_z256_modp_mont_mul(sm2_z256_t r, const sm2_z256_t a, const sm2_z256_t b
}
}
void sm2_z256_modp_mont_sqr(sm2_z256_t r, const sm2_z256_t a)
{
sm2_z256_modp_mont_mul(r, a, a);
}
// mont(mont(a), 1) = aR * 1 * R^-1 (mod p) = a (mod p)
void sm2_z256_modp_from_mont(sm2_z256_t r, const sm2_z256_t a)
{
sm2_z256_modp_mont_mul(r, a, SM2_Z256_ONE);
}
// 2^512 (mod p)
static const uint64_t SM2_Z256_2e512modp_neon[4] = {
0x0000000200000003, 0x00000002ffffffff, 0x0000000100000001, 0x0000000400000002
};
// mont(a) = a * 2^256 (mod p) = mont_mul(a, 2^512 mod p)
void sm2_z256_modp_to_mont(const sm2_z256_t a, uint64_t r[4])
{
sm2_z256_modp_mont_mul(r, a, SM2_Z256_2e512modp_neon);
}
#else // ENABLE_SM2_Z256_NEON
// z = a*b