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feat(libc): implement sqrt and sqrtf 

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Adrià Franch 2026-10-11 04:44:39 +02:00
parent aac0f1b810
commit 660abec2d3
2 changed files with 16 additions and 0 deletions
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2
core/libs/prx/libc/src/Math.cpp
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@ -46,6 +46,8 @@ int APS5_VABI __isinff_nid_postfix(float x) { return std::isinf(x) ? 1 : 0; }
double APS5_VABI cbrt_nid_postfix(double x) { return std::cbrt(x); }
double APS5_VABI asin_nid_postfix(double x) { return std::asin(x); }
double APS5_VABI acos_nid_postfix(double x) { return std::acos(x); }
double APS5_VABI sqrt_nid_postfix(double x) { return std::sqrt(x); }
float APS5_VABI sqrtf_nid_postfix(float x) { return std::sqrt(x); }
long double APS5_VABI acosl_nid_postfix(long double x) { return std::acos(x); }
long double APS5_VABI frexpl_nid_postfix(long double x, int* exponent) {

14
core/libs/tests/GuestMath.cpp
View File

@ -23,6 +23,8 @@ std::uint64_t APS5_VABI _Stoul_nid_postfix(const char*, char**, int);
std::int64_t APS5_VABI atol_nid_postfix(const char*);
long long APS5_VABI atoll_nid_postfix(const char*);
int* APS5_VABI __error_nid_postfix();
double APS5_VABI sqrt_nid_postfix(double);
float APS5_VABI sqrtf_nid_postfix(float);
long double APS5_VABI acosl_nid_postfix(long double);
long double APS5_VABI frexpl_nid_postfix(long double, int*);
struct LibcFloatConstant { std::uint32_t bits[4]; };
@ -61,6 +63,17 @@ std::lldiv_t APS5_VABI ldiv_nid_postfix(std::int64_t, std::int64_t);
}
static void Require(bool value) { if (!value) std::abort(); }
static void CheckSquareRoot() {
Require(sqrt_nid_postfix(4.) == 2. && sqrtf_nid_postfix(6.25f) == 2.5f);
Require(std::bit_cast<std::uint64_t>(sqrt_nid_postfix(2.)) == 0x3ff6a09e667f3bcdull);
Require(std::bit_cast<std::uint32_t>(sqrtf_nid_postfix(2.f)) == 0x3fb504f3u);
Require(std::bit_cast<std::uint64_t>(sqrt_nid_postfix(0x1p-1074)) == 0x1e60000000000000ull);
Require(std::bit_cast<std::uint64_t>(sqrt_nid_postfix(-0.)) == 0x8000000000000000ull);
Require(std::bit_cast<std::uint32_t>(sqrtf_nid_postfix(-0.f)) == 0x80000000u);
Require(sqrt_nid_postfix(INFINITY) == INFINITY && sqrtf_nid_postfix(INFINITY) == INFINITY);
Require(std::isnan(sqrt_nid_postfix(-1.)) && std::isnan(sqrtf_nid_postfix(-1.f)));
}
static bool ExtendedBits(long double value, std::uint64_t mantissa, std::uint16_t signExponent) {
unsigned char bytes[sizeof(long double)]{};
std::memcpy(bytes, &value, sizeof(value));
@ -289,6 +302,7 @@ int main() {
Require(std::isnan(logbf_nid_postfix(std::numeric_limits<float>::quiet_NaN())));
Require(exp2_nid_postfix(-3.) == 0.125);
Require(ldexp_nid_postfix(0.75, 4) == 12.);
CheckSquareRoot();
CheckLongDouble();
Require(scalbn_nid_postfix(0.75, -2) == 0.1875);
Require(scalbnf_nid_postfix(0.75f, 4) == 12.f);