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Merge pull request #4037 from Nixitov/feat/libc-divti3 

feat(libc): implement __divti3
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Dean 2026-10-13 01:20:26 +13:00 committed by GitHub
parent ffa198407e 7d9966a8ee
commit baee04e810
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3 changed files with 41 additions and 0 deletions
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13
core/libs/prx/libc/include/SonyCrt.hpp
View File

@ -195,6 +195,19 @@ inline unsigned __int128 SonyUdivti3(unsigned __int128 dividend, unsigned __int1
return quotient;
}
inline __int128 SonyDivti3(__int128 dividend, __int128 divisor) {
if (divisor == 0) throw std::runtime_error("__divti3: integer divide by zero");
const bool negative = (dividend < 0) != (divisor < 0);
const unsigned __int128 magnitudeDividend = dividend < 0
? (unsigned __int128)0 - (unsigned __int128)dividend
: (unsigned __int128)dividend;
const unsigned __int128 magnitudeDivisor = divisor < 0
? (unsigned __int128)0 - (unsigned __int128)divisor
: (unsigned __int128)divisor;
const unsigned __int128 magnitude = SonyUdivti3(magnitudeDividend, magnitudeDivisor);
return (__int128)(negative ? (unsigned __int128)0 - magnitude : magnitude);
}
}
#endif

4
core/libs/prx/libc/src/RuntimeSupport.cpp
View File

@ -180,6 +180,10 @@ void APS5_VABI _Unlocksyslock_nid_postfix() {
g_sysLock.unlock();
}
__int128 APS5_VABI __divti3_nid_postfix(__int128 dividend, __int128 divisor) {
return SonyDivti3(dividend, divisor);
}
unsigned __int128 APS5_VABI __udivti3_nid_postfix(unsigned __int128 dividend, unsigned __int128 divisor) {
return SonyUdivti3(dividend, divisor);
}

24
core/libs/tests/GuestCrt.cpp
View File

@ -31,6 +31,7 @@ std::size_t APS5_VABI mbstowcs_nid_postfix(std::uint16_t* dest, const char* src,
char* APS5_VABI strtok_s_nid_postfix(char* str, const char* delim, char** context);
int APS5_VABI __fpclassifyd_nid_postfix(double value);
unsigned __int128 APS5_VABI __udivti3_nid_postfix(unsigned __int128 dividend, unsigned __int128 divisor);
__int128 APS5_VABI __divti3_nid_postfix(__int128 dividend, __int128 divisor);
SonyLconv* APS5_VABI localeconv_nid_postfix(void);
int APS5_VABI sceAmprFpclassifyd(double value);
unsigned int APS5_VABI _ZSt14_Random_devicev_nid_postfix();
@ -85,6 +86,29 @@ int main() {
}
Require(trapped);
Require(__divti3_nid_postfix(100, 3) == 33);
Require(__divti3_nid_postfix(-100, 3) == -33);
Require(__divti3_nid_postfix(100, -3) == -33);
Require(__divti3_nid_postfix(-100, -3) == 33);
Require(SonyDivti3(0, 5) == 0);
const __int128 large = (__int128)1 << 100;
Require(SonyDivti3(large, 3) == large / 3);
Require(SonyDivti3(-large, 3) == -(large / 3));
Require(SonyDivti3(large, -3) == -(large / 3));
Require(SonyDivti3(-large, -3) == large / 3);
const __int128 minimum = (__int128)((unsigned __int128)1 << 127);
const __int128 maximum = (__int128)(((unsigned __int128)1 << 127) - 1);
Require(SonyDivti3(minimum, 1) == minimum);
Require(SonyDivti3(minimum, -1) == minimum);
Require(SonyDivti3(maximum, -1) == -maximum);
trapped = false;
try {
SonyDivti3(1, 0);
} catch (const std::exception&) {
trapped = true;
}
Require(trapped);
void* previous = sceAmprSetConstraintHandlerS(reinterpret_cast<void*>(&CountingHandler));
Require(previous != nullptr);
Require(previous != reinterpret_cast<void*>(&CountingHandler));