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| author | Marat Dukhan <maratek@gmail.com> | 2020-04-12 15:33:30 -0700 |
|---|---|---|
| committer | Marat Dukhan <maratek@gmail.com> | 2020-04-12 15:33:30 -0700 |
| commit | 8e02fe647cec1015e26435759c86f3309af38ade (patch) | |
| tree | c7fdc3c1340a5e3623dd39498476689267db90ec | |
| parent | 8480d4e85d3703219e24603e3d5d00deebf6223d (diff) | |
| download | FXdiv-8e02fe647cec1015e26435759c86f3309af38ade.tar.gz | |
Indicate cloberred condition flags in inline assembly
| -rw-r--r-- | include/fxdiv.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/include/fxdiv.h b/include/fxdiv.h index aa97340..0fcc029 100644 --- a/include/fxdiv.h +++ b/include/fxdiv.h @@ -131,7 +131,8 @@ static inline struct fxdiv_divisor_uint32_t fxdiv_init_uint32_t(uint32_t d) { uint32_t l_minus_1; __asm__("BSRL %[d_minus_1], %[l_minus_1]" : [l_minus_1] "=r" (l_minus_1) - : [d_minus_1] "r" (d - 1)); + : [d_minus_1] "r" (d - 1) + : "cc"); #elif defined(__GNUC__) const uint32_t l_minus_1 = 31 - __builtin_clz(d - 1); #else @@ -170,7 +171,8 @@ static inline struct fxdiv_divisor_uint32_t fxdiv_init_uint32_t(uint32_t d) { uint32_t q; __asm__("DIVL %[d]" : "=a" (q), "+d" (u_hi) - : [d] "r" (d), "a" (0)); + : [d] "r" (d), "a" (0) + : "cc"); #elif (defined(_MSC_VER) && _MSC_VER >= 1920) && (defined(_M_IX86) || defined(_M_X64)) unsigned int remainder; const uint32_t q = (uint32_t) _udiv64((unsigned __int64) ((uint64_t) u_hi << 32), (unsigned int) d, &remainder); @@ -219,7 +221,8 @@ static inline struct fxdiv_divisor_uint64_t fxdiv_init_uint64_t(uint64_t d) { uint64_t l_minus_1; __asm__("BSRQ %[d_minus_1], %[l_minus_1]" : [l_minus_1] "=r" (l_minus_1) - : [d_minus_1] "r" (d - 1)); + : [d_minus_1] "r" (d - 1) + : "cc"); #elif defined(__GNUC__) const uint32_t l_minus_1 = 63 - __builtin_clzll(d - 1); const uint32_t nlz_d = __builtin_clzll(d); @@ -266,7 +269,8 @@ static inline struct fxdiv_divisor_uint64_t fxdiv_init_uint64_t(uint64_t d) { uint64_t q; __asm__("DIVQ %[d]" : "=a" (q), "+d" (u_hi) - : [d] "r" (d), "a" (UINT64_C(0))); + : [d] "r" (d), "a" (UINT64_C(0)) + : "cc"); #elif 0 && defined(__GNUC__) && defined(__SIZEOF_INT128__) /* GCC, Clang, and Intel Compiler fail to inline optimized implementation and call into support library for 128-bit division */ const uint64_t q = (uint64_t) (((unsigned __int128) u_hi << 64) / ((unsigned __int128) d)); |