<sys/platform/x86.h>: Add APX support

Add support for Intel Advanced Performance Extensions:

https://www.intel.com/content/www/us/en/developer/articles/technical/advanced-performance-extensions-apx.html

to <sys/platform/x86.h>.

diff --git a/manual/platform.texi b/manual/platform.texi
index c6ed73cb97bff712cf55bc0b03fdf4cf3dfc7ceb..2a2d557067ad60910ebec4d47734b00094180679 100644 (file)
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -209,6 +209,9 @@ The supported processor features are:
 @item
 @code{AMX_TILE} -- Tile architecture.
 
+@item
+@code{APX_F} -- The APX instruction extensions.
+
 @item
 @code{ARCH_CAPABILITIES} -- IA32_ARCH_CAPABILITIES MSR.
 

diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h
index 6555f9b91d681f9ffb079de2c6dbc1ca3177f5dc..88ca071aa7f6c15d6d2567a8d74bdd5c21884e00 100644 (file)
--- a/sysdeps/x86/bits/platform/x86.h
+++ b/sysdeps/x86/bits/platform/x86.h
@@ -312,6 +312,7 @@ enum
   x86_cpu_AVX_NE_CONVERT       = x86_cpu_index_7_ecx_1_edx + 5,
   x86_cpu_AMX_COMPLEX          = x86_cpu_index_7_ecx_1_edx + 8,
   x86_cpu_PREFETCHI            = x86_cpu_index_7_ecx_1_edx + 14,
+  x86_cpu_APX_F                        = x86_cpu_index_7_ecx_1_edx + 21,
 
   x86_cpu_index_19_ebx
     = (CPUID_INDEX_19 * 8 * 4 * sizeof (unsigned int)

diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 9ac195810fefb08be902e6d4ce6fa4a1fa87bc41..badf088874703721e1b1f830734f6493b2aa072f 100644 (file)
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -226,6 +226,10 @@ update_active (struct cpu_features *cpu_features)
          CPU_FEATURE_SET_ACTIVE (cpu_features, AMX_COMPLEX);
        }
 
+      /* APX is usable only if the APX state is supported by kernel.  */
+      if ((xcrlow & bit_APX_state) != 0)
+       CPU_FEATURE_SET_ACTIVE (cpu_features, APX_F);
+
       /* These features are usable only when OSXSAVE is enabled.  */
       CPU_FEATURE_SET (cpu_features, XSAVE);
       CPU_FEATURE_SET_ACTIVE (cpu_features, XSAVEOPT);

diff --git a/sysdeps/x86/include/cpu-features.h b/sysdeps/x86/include/cpu-features.h
index c740e1a5fc7da45353b5cf3fc3dbd3a4a8daa79b..eb30d342a65ecc736e1bc96093b0d757347ec3e3 100644 (file)
--- a/sysdeps/x86/include/cpu-features.h
+++ b/sysdeps/x86/include/cpu-features.h
@@ -319,6 +319,7 @@ enum
 #define bit_cpu_AVX_NE_CONVERT (1u << 5)
 #define bit_cpu_AMX_COMPLEX    (1u << 8)
 #define bit_cpu_PREFETCHI      (1u << 14)
+#define bit_cpu_APX_F          (1u << 21)
 
 /* CPUID_INDEX_19.  */
 
@@ -562,6 +563,7 @@ enum
 #define index_cpu_AVX_NE_CONVERT CPUID_INDEX_7_ECX_1
 #define index_cpu_AMX_COMPLEX  CPUID_INDEX_7_ECX_1
 #define index_cpu_PREFETCHI    CPUID_INDEX_7_ECX_1
+#define index_cpu_APX_F                CPUID_INDEX_7_ECX_1
 
 /* CPUID_INDEX_19.  */
 
@@ -807,6 +809,7 @@ enum
 #define reg_AVX_NE_CONVERT     edx
 #define reg_AMX_COMPLEX                edx
 #define reg_PREFETCHI          edx
+#define reg_APX_F              edx
 
 /* CPUID_INDEX_19.  */
 
@@ -845,6 +848,7 @@ enum
 #define bit_ZMM16_31_state     (1u << 7)
 #define bit_XTILECFG_state     (1u << 17)
 #define bit_XTILEDATA_state    (1u << 18)
+#define bit_APX_state          (1u << 19)
 
 enum cpu_features_kind
 {

diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
index 1bd7e0be5388b15d3589ace8470311bb2bae1ef0..b27fa7324a911db7921e531823fe317675835b5f 100644 (file)
--- a/sysdeps/x86/tst-get-cpu-features.c
+++ b/sysdeps/x86/tst-get-cpu-features.c
@@ -219,6 +219,7 @@ do_test (void)
   CHECK_CPU_FEATURE_PRESENT (AVX_NE_CONVERT);
   CHECK_CPU_FEATURE_PRESENT (AMX_COMPLEX);
   CHECK_CPU_FEATURE_PRESENT (PREFETCHI);
+  CHECK_CPU_FEATURE_PRESENT (APX_F);
   CHECK_CPU_FEATURE_PRESENT (AESKLE);
   CHECK_CPU_FEATURE_PRESENT (WIDE_KL);
   CHECK_CPU_FEATURE_PRESENT (PTWRITE);
@@ -390,6 +391,7 @@ do_test (void)
   CHECK_CPU_FEATURE_ACTIVE (AVX_NE_CONVERT);
   CHECK_CPU_FEATURE_ACTIVE (AMX_COMPLEX);
   CHECK_CPU_FEATURE_ACTIVE (PREFETCHI);
+  CHECK_CPU_FEATURE_ACTIVE (APX_F);
   CHECK_CPU_FEATURE_ACTIVE (AESKLE);
   CHECK_CPU_FEATURE_ACTIVE (WIDE_KL);
   CHECK_CPU_FEATURE_ACTIVE (PTWRITE);