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[v1.05][ARM] Another try at properly implement SVE detection

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Dr-Noob
2024-08-06 08:57:37 +01:00
parent 26af5ff83e
commit f6cdabe973
3 changed files with 19 additions and 7 deletions
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19
src/arm/midr.c
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@@ -144,15 +144,16 @@ void init_cpu_info(struct cpuInfo* cpu) {
// https://learn.arm.com/learning-paths/servers-and-cloud-computing/sve/sve_basics/#:~:text=Using%20a%20text%20editor%20of%20your%20choice%2C%20copy,svcntb%28%29%29%3B%20%7D%20This%20program%20prints%20the%20vector%20length
static inline uint32_t sve_cntb(void) {
#ifdef __ARM_FEATURE_SVE
uint32_t x0 = 0;
#ifdef __ARM_FEATURE_SVE
__asm volatile("cntb %0"
: "=r"(x0));
printf("cntb=%d\n", x0);
#endif
return x0;
#else
printBug("sve_cntb: SVE not enabled by the compiler");
return 0;
#endif
}
@@ -221,8 +222,14 @@ struct features* get_features_info(void) {
feat->SVE2 = false;
#endif // ifdef __linux__
if (feat->SVE || feat->SVE2)
feat->cntb = sve_cntb();
if (feat->SVE || feat->SVE2) {
#ifdef __ARM_FEATURE_SVE
feat->cntb = sve_cntb();
#else
printWarn("Hardware supports SVE, but not the compiler");
feat->cntb = 0;
#endif
}
return feat;
}