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fix test 92 not failing properly on GCC/amd64

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This commit is contained in:
tevador 2020-05-06 13:48:53 +02:00
parent 6a764e90d0
commit 148b923f71
3 changed files with 24 additions and 3 deletions
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15
src/instructions_portable.cpp
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@ -157,6 +157,21 @@ void rx_set_rounding_mode(uint32_t mode) {
}
}
uint32_t rx_get_rounding_mode() {
switch (fegetround()) {
case FE_DOWNWARD:
return RoundDown;
case FE_UPWARD:
return RoundUp;
case FE_TOWARDZERO:
return RoundToZero;
case FE_TONEAREST:
return RoundToNearest;
default:
UNREACHABLE;
}
}
#endif
#ifdef RANDOMX_USE_X87

6
src/intrin_portable.h
View file

@ -173,6 +173,10 @@ FORCE_INLINE void rx_set_rounding_mode(uint32_t mode) {
_mm_setcsr(rx_mxcsr_default | (mode << 13));
}
FORCE_INLINE uint32_t rx_get_rounding_mode() {
return (_mm_getcsr() >> 13) & 3;
}
#elif defined(__PPC64__) && defined(__ALTIVEC__) && defined(__VSX__) //sadly only POWER7 and newer will be able to use SIMD acceleration. Earlier processors cant use doubles or 64 bit integers with SIMD
#include <cstdint>
#include <stdexcept>
@ -736,6 +740,8 @@ void rx_reset_float_state();
void rx_set_rounding_mode(uint32_t mode);
uint32_t rx_get_rounding_mode();
#endif
double loadDoublePortable(const void* addr);

6
src/tests/tests.cpp
View file

@ -4,7 +4,6 @@
#include <cassert>
#include <iomanip>
#include <cfenv>
#include "utility.hpp"
#include "../bytecode_machine.hpp"
#include "../dataset.hpp"
@ -1076,10 +1075,11 @@ int main() {
});
runTest("Preserve rounding mode", RANDOMX_FREQ_CFROUND > 0, []() {
fesetround(FE_TONEAREST);
rx_set_rounding_mode(RoundToNearest);
char hash[RANDOMX_HASH_SIZE];
calcStringHash("test key 000", "Lorem ipsum dolor sit amet", &hash);
assert(fegetround() == FE_TONEAREST);
assert(equalsHex(hash, "300a0adb47603dedb42228ccb2b211104f4da45af709cd7547cd049e9489c969"));
assert(rx_get_rounding_mode() == RoundToNearest);
});
randomx_destroy_vm(vm);