OERV-RUNTIME/boringssl
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

use intrinsics for adc/sbb on MSVC

Browse Source 
Change-Id: I54dd53c796aaebcf5b1846bfad13dd72ea5bfbc3
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/79867
Auto-Submit: Andres Erbsen <andreser@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
This commit is contained in:
Andres Erbsen
2025-06-23 13:35:33 -07:00
committed by Boringssl LUCI CQ
parent 6f1a411710
commit 81be8eb2ca
1 changed files with 27 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crypto/internal.h
+27 -1
View File
@@ -50,6 +50,10 @@
#include <windows.h>
#endif
#if defined(_M_X64) || defined(_M_IX86)
#include "intrin.h"
#endif
#if defined(__cplusplus)
extern "C" {
#endif
@@ -1480,16 +1484,26 @@ inline uint64_t CRYPTO_addc_u64(uint64_t x, uint64_t y, uint64_t carry,
static inline uint32_t CRYPTO_addc_u32(uint32_t x, uint32_t y, uint32_t carry,
uint32_t *out_carry) {
declassify_assert(carry <= 1);
#if defined(_M_IX86)
uint32_t sum = 0;
*out_carry = _addcarry_u32(carry, x, y, &sum);
return sum;
#else
uint64_t ret = carry;
ret += (uint64_t)x + y;
*out_carry = (uint32_t)(ret >> 32);
return (uint32_t)ret;
#endif
}
static inline uint64_t CRYPTO_addc_u64(uint64_t x, uint64_t y, uint64_t carry,
uint64_t *out_carry) {
declassify_assert(carry <= 1);
#if defined(BORINGSSL_HAS_UINT128)
#if defined(_M_X64)
uint64_t sum = 0;
*out_carry = _addcarry_u64(carry, x, y, &sum);
return sum;
#elif defined(BORINGSSL_HAS_UINT128)
uint128_t ret = carry;
ret += (uint128_t)x + y;
*out_carry = (uint64_t)(ret >> 64);
@@ -1544,17 +1558,29 @@ inline uint64_t CRYPTO_subc_u64(uint64_t x, uint64_t y, uint64_t borrow,
static inline uint32_t CRYPTO_subc_u32(uint32_t x, uint32_t y, uint32_t borrow,
uint32_t *out_borrow) {
declassify_assert(borrow <= 1);
#if defined(_M_IX86)
uint32_t diff = 0;
*out_borrow = _subborrow_u32(borrow, x, y, &diff);
return diff;
#else
uint32_t ret = x - y - borrow;
*out_borrow = (x < y) | ((x == y) & borrow);
return ret;
#endif
}
static inline uint64_t CRYPTO_subc_u64(uint64_t x, uint64_t y, uint64_t borrow,
uint64_t *out_borrow) {
declassify_assert(borrow <= 1);
#if defined(_M_X64)
uint64_t diff = 0;
*out_borrow = _subborrow_u64(borrow, x, y, &diff);
return diff;
#else
uint64_t ret = x - y - borrow;
*out_borrow = (x < y) | ((x == y) & borrow);
return ret;
#endif
}
#endif