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feat(libc): export the remaining Dinkumware floating-point constants

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Add _Denorm, _Hugeval, _Nan, _Snan, _FDenorm, _FSnan, _LDenorm, _LInf,
_LNan and _LSnan with the 16 bytes the console's libc.prx exports.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
This commit is contained in:
priyanshrv-netizenandClaude Opus 5.5 committed 2026-10-20 22:15:51 +05:30
1 parent d0852defa2
commit 91c401db5e
2 files changed
+53
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core/libs/prx/libc/src/Math.cpp
+10
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@@ -706,4 +706,14 @@ union SonyDconst {
static_assert(std::endian::native == std::endian::little);
SonyDconst _Inf_nid_postfix {{0, 0, 0, 0x7ff0, 0, 0, 0, 0}};
SonyDconst _Denorm_nid_postfix {{1, 0, 0, 0, 0, 0, 0, 0}};
SonyDconst _Hugeval_nid_postfix {{0, 0, 0, 0x7ff0, 0, 0, 0, 0}};
SonyDconst _Nan_nid_postfix {{0, 0, 0, 0x7ff8, 0, 0, 0, 0}};
SonyDconst _Snan_nid_postfix {{1, 0, 0, 0x7ff0, 0, 0, 0, 0}};
LibcFloatConstant _FDenorm_nid_postfix {{0x00000001u, 0, 0, 0}};
LibcFloatConstant _FSnan_nid_postfix {{0x7f800001u, 0, 0, 0}};
SonyDconst _LDenorm_nid_postfix {{1, 0, 0, 0, 0, 0, 0, 0}};
SonyDconst _LInf_nid_postfix {{0, 0, 0, 0x8000, 0x7fff, 0, 0, 0}};
SonyDconst _LNan_nid_postfix {{0, 0, 0, 0xc000, 0x7fff, 0, 0, 0}};
SonyDconst _LSnan_nid_postfix {{1, 0, 0, 0x8000, 0x7fff, 0, 0, 0}};
}
core/libs/tests/GuestMath.cpp
+43
View File
@@ -57,6 +57,18 @@ long double APS5_VABI frexpl_nid_postfix(long double, int*);
struct LibcFloatConstant { std::uint32_t bits[4]; };
extern LibcFloatConstant _FInf_nid_postfix;
extern LibcFloatConstant _FNan_nid_postfix;
extern LibcFloatConstant _FDenorm_nid_postfix;
extern LibcFloatConstant _FSnan_nid_postfix;
union SonyDconst { unsigned short _Word[8]; float _Float; double _Double; long double _Long_double; };
extern SonyDconst _Inf_nid_postfix;
extern SonyDconst _Denorm_nid_postfix;
extern SonyDconst _Hugeval_nid_postfix;
extern SonyDconst _Nan_nid_postfix;
extern SonyDconst _Snan_nid_postfix;
extern SonyDconst _LDenorm_nid_postfix;
extern SonyDconst _LInf_nid_postfix;
extern SonyDconst _LNan_nid_postfix;
extern SonyDconst _LSnan_nid_postfix;
short APS5_VABI _FDtest_nid_postfix(const float*);
short APS5_VABI _Dtest_nid_postfix(const double*);
int APS5_VABI __fpclassifyf_nid_postfix(float);
@@ -881,6 +893,36 @@ static void CheckFloatClassification() {
Require(_FDtest_nid_postfix(reinterpret_cast<const float*>(&_FNan_nid_postfix)) == 2);
}
static void RequireBytes(const void* constant, std::initializer_list<unsigned char> expected) {
unsigned char bytes[16];
std::memcpy(bytes, constant, sizeof(bytes));
int index = 0;
for (const unsigned char byte : expected) Require(bytes[index++] == byte);
while (index < 16) Require(bytes[index++] == 0);
}
static void CheckDinkumwareConstants() {
RequireBytes(&_Inf_nid_postfix, {0, 0, 0, 0, 0, 0, 0xf0, 0x7f});
RequireBytes(&_Denorm_nid_postfix, {1});
RequireBytes(&_Hugeval_nid_postfix, {0, 0, 0, 0, 0, 0, 0xf0, 0x7f});
RequireBytes(&_Nan_nid_postfix, {0, 0, 0, 0, 0, 0, 0xf8, 0x7f});
RequireBytes(&_Snan_nid_postfix, {1, 0, 0, 0, 0, 0, 0xf0, 0x7f});
RequireBytes(&_FDenorm_nid_postfix, {1});
RequireBytes(&_FSnan_nid_postfix, {1, 0, 0x80, 0x7f});
RequireBytes(&_LDenorm_nid_postfix, {1});
RequireBytes(&_LInf_nid_postfix, {0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f});
RequireBytes(&_LNan_nid_postfix, {0, 0, 0, 0, 0, 0, 0, 0xc0, 0xff, 0x7f});
RequireBytes(&_LSnan_nid_postfix, {1, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f});
Require(_Dtest_nid_postfix(&_Denorm_nid_postfix._Double) == -2 && _Denorm_nid_postfix._Double == std::numeric_limits<double>::denorm_min());
Require(_Dtest_nid_postfix(&_Hugeval_nid_postfix._Double) == 1 && _Hugeval_nid_postfix._Double == HUGE_VAL);
Require(_Dtest_nid_postfix(&_Nan_nid_postfix._Double) == 2 && _Dtest_nid_postfix(&_Snan_nid_postfix._Double) == 2);
Require(_FDtest_nid_postfix(reinterpret_cast<const float*>(&_FDenorm_nid_postfix)) == -2);
Require(_FDtest_nid_postfix(reinterpret_cast<const float*>(&_FSnan_nid_postfix)) == 2);
Require(_LDenorm_nid_postfix._Long_double == std::numeric_limits<long double>::denorm_min());
Require(_LInf_nid_postfix._Long_double == std::numeric_limits<long double>::infinity());
Require(std::isnan(_LNan_nid_postfix._Long_double) && std::isnan(_LSnan_nid_postfix._Long_double));
}
static void CheckMissingClassificationExports() {
const float infinity = std::numeric_limits<float>::infinity();
const float nan = std::numeric_limits<float>::quiet_NaN();
@@ -1074,6 +1116,7 @@ static void CheckNoConversionIsPositiveZero() {
int main() {
CheckFloatClassification();
CheckDinkumwareConstants();
CheckNoConversionIsPositiveZero();
CheckMissingClassificationExports();
CheckFloatMathExports();