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cpuinfo: reset cpu features on SDL_Quit

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This commit is contained in:
Anonymous Maarten
2024-02-24 13:46:06 +01:00
committed by Sam Lantinga
parent 64465653b4
commit 1aa9ef7213
9 changed files with 52 additions and 5 deletions
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17
src/cpuinfo/SDL_cpuinfo.c
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@@ -18,6 +18,7 @@
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
#if defined(SDL_PLATFORM_WIN32) || defined(SDL_PLATFORM_WINRT) || defined(SDL_PLATFORM_GDK)
@@ -855,7 +856,9 @@ int SDL_GetCPUCacheLineSize(void)
}
}
static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
#define SDL_CPUFEATURES_RESET_VALUE 0xFFFFFFFF
static Uint32 SDL_CPUFeatures = SDL_CPUFEATURES_RESET_VALUE;
static Uint32 SDL_SIMDAlignment = 0xFFFFFFFF;
static SDL_bool ref_string_equals(const char *ref, const char *test, const char *end_test) {
@@ -865,10 +868,10 @@ static SDL_bool ref_string_equals(const char *ref, const char *test, const char
static Uint32 SDLCALL SDL_CPUFeatureMaskFromHint(void)
{
Uint32 result_mask = 0xFFFFFFFF;
Uint32 result_mask = SDL_CPUFEATURES_RESET_VALUE;
const char *hint = SDL_GetHint(SDL_HINT_CPU_FEATURE_MASK);
if (hint) {
for (const char *spot = hint, *next; *spot; spot = next) {
const char *end = SDL_strchr(spot, ',');
@@ -889,7 +892,7 @@ static Uint32 SDLCALL SDL_CPUFeatureMaskFromHint(void)
spot += 1;
}
if (ref_string_equals("all", spot, end)) {
spot_mask = 0xFFFFFFFF;
spot_mask = SDL_CPUFEATURES_RESET_VALUE;
} else if (ref_string_equals("altivec", spot, end)) {
spot_mask= CPU_HAS_ALTIVEC;
} else if (ref_string_equals("mmx", spot, end)) {
@@ -934,7 +937,7 @@ static Uint32 SDLCALL SDL_CPUFeatureMaskFromHint(void)
static Uint32 SDL_GetCPUFeatures(void)
{
if (SDL_CPUFeatures == 0xFFFFFFFF) {
if (SDL_CPUFeatures == SDL_CPUFEATURES_RESET_VALUE) {
CPU_calcCPUIDFeatures();
SDL_CPUFeatures = 0;
SDL_SIMDAlignment = sizeof(void *); /* a good safe base value */
@@ -999,6 +1002,10 @@ static Uint32 SDL_GetCPUFeatures(void)
return SDL_CPUFeatures;
}
void SDL_QuitCPUInfo(void) {
SDL_CPUFeatures = SDL_CPUFEATURES_RESET_VALUE;
}
#define CPU_FEATURE_AVAILABLE(f) ((SDL_GetCPUFeatures() & (f)) ? SDL_TRUE : SDL_FALSE)
SDL_bool SDL_HasAltiVec(void)