[FMV] Remove useless features according the latest ACLE spec. (#88965)

As explained in https://github.com/ARM-software/acle/pull/315 we
are deprecating features which aren't adding any value. These are:

sha1, pmull, dit, dgh, ebf16, sve-bf16, sve-ebf16, sve-i8mm,
sve2-pmull128, memtag2, memtag3, ssbs2, bti, ls64_v, ls64_accdata

4 files changed, 4 insertions, 65 deletions

diff --git a/compiler-rt/lib/builtins/cpu_model/aarch64.c b/compiler-rt/lib/builtins/cpu_model/aarch64.c
index 17bddfca46f0..1ac4d85a0c13 100644
--- a/compiler-rt/lib/builtins/cpu_model/aarch64.c
+++ b/compiler-rt/lib/builtins/cpu_model/aarch64.c
@@ -67,13 +67,10 @@ enum CPUFeatures {
   FEAT_FP,
   FEAT_SIMD,
   FEAT_CRC,
-  FEAT_SHA1,
   FEAT_SHA2,
   FEAT_SHA3,
   FEAT_AES,
-  FEAT_PMULL,
   FEAT_FP16,
-  FEAT_DIT,
   FEAT_DPB,
   FEAT_DPB2,
   FEAT_JSCVT,
@@ -81,35 +78,23 @@ enum CPUFeatures {
   FEAT_RCPC,
   FEAT_RCPC2,
   FEAT_FRINTTS,
-  FEAT_DGH,
   FEAT_I8MM,
   FEAT_BF16,
-  FEAT_EBF16,
   FEAT_RPRES,
   FEAT_SVE,
-  FEAT_SVE_BF16,
-  FEAT_SVE_EBF16,
-  FEAT_SVE_I8MM,
   FEAT_SVE_F32MM,
   FEAT_SVE_F64MM,
   FEAT_SVE2,
   FEAT_SVE_AES,
-  FEAT_SVE_PMULL128,
   FEAT_SVE_BITPERM,
   FEAT_SVE_SHA3,
   FEAT_SVE_SM4,
   FEAT_SME,
   FEAT_MEMTAG,
-  FEAT_MEMTAG2,
-  FEAT_MEMTAG3,
   FEAT_SB,
   FEAT_PREDRES,
   FEAT_SSBS,
-  FEAT_SSBS2,
-  FEAT_BTI,
   FEAT_LS64,
-  FEAT_LS64_V,
-  FEAT_LS64_ACCDATA,
   FEAT_WFXT,
   FEAT_SME_F64,
   FEAT_SME_I64,
@@ -117,7 +102,7 @@ enum CPUFeatures {
   FEAT_RCPC3,
   FEAT_MOPS,
   FEAT_MAX,
-  FEAT_EXT = 62, // Reserved to indicate presence of additional features field
+  FEAT_EXT = 47, // Reserved to indicate presence of additional features field
                  // in __aarch64_cpu_features
   FEAT_INIT      // Used as flag of features initialization completion
 };
diff --git a/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/apple.inc b/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/apple.inc
index 6fef109567b6..19114c4abdfc 100644
--- a/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/apple.inc
+++ b/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/apple.inc
@@ -35,13 +35,10 @@ void __init_cpu_features_resolver(void) {
       {"hw.optional.floatingpoint", FEAT_FP},
       {"hw.optional.AdvSIMD", FEAT_SIMD},
       {"hw.optional.armv8_crc32", FEAT_CRC},
-      {"hw.optional.arm.FEAT_SHA1", FEAT_SHA1},
       {"hw.optional.arm.FEAT_SHA256", FEAT_SHA2},
       {"hw.optional.arm.FEAT_SHA3", FEAT_SHA3},
       {"hw.optional.arm.FEAT_AES", FEAT_AES},
-      {"hw.optional.arm.FEAT_PMULL", FEAT_PMULL},
       {"hw.optional.arm.FEAT_FP16", FEAT_FP16},
-      {"hw.optional.arm.FEAT_DIT", FEAT_DIT},
       {"hw.optional.arm.FEAT_DPB", FEAT_DPB},
       {"hw.optional.arm.FEAT_DPB2", FEAT_DPB2},
       {"hw.optional.arm.FEAT_JSCVT", FEAT_JSCVT},
@@ -53,8 +50,7 @@ void __init_cpu_features_resolver(void) {
       {"hw.optional.arm.FEAT_BF16", FEAT_BF16},
       {"hw.optional.arm.FEAT_SB", FEAT_SB},
       {"hw.optional.arm.FEAT_SPECRES", FEAT_PREDRES},
-      {"hw.optional.arm.FEAT_SSBS", FEAT_SSBS2},
-      {"hw.optional.arm.FEAT_BTI", FEAT_BTI},
+      {"hw.optional.arm.FEAT_SSBS", FEAT_SSBS},
   };
 
   for (size_t I = 0, E = sizeof(feature_checks) / sizeof(feature_checks[0]);
diff --git a/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/fuchsia.inc b/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/fuchsia.inc
index d8e0280f4041..579aa00dc5c7 100644
--- a/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/fuchsia.inc
+++ b/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/fuchsia.inc
@@ -22,10 +22,6 @@ void __init_cpu_features_resolver() {
     setCPUFeature(FEAT_SIMD);
   if (features & ZX_ARM64_FEATURE_ISA_AES)
     setCPUFeature(FEAT_AES);
-  if (features & ZX_ARM64_FEATURE_ISA_PMULL)
-    setCPUFeature(FEAT_PMULL);
-  if (features & ZX_ARM64_FEATURE_ISA_SHA1)
-    setCPUFeature(FEAT_SHA1);
   if (features & ZX_ARM64_FEATURE_ISA_SHA256)
     setCPUFeature(FEAT_SHA2);
   if (features & ZX_ARM64_FEATURE_ISA_CRC32)
diff --git a/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/mrs.inc b/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/mrs.inc
index 32a21a2fba9a..54797852e4aa 100644
--- a/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/mrs.inc
+++ b/compiler-rt/lib/builtins/cpu_model/aarch64/fmv/mrs.inc
@@ -16,8 +16,6 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
     hwcap2 = arg->_hwcap2;
   if (hwcap & HWCAP_CRC32)
     setCPUFeature(FEAT_CRC);
-  if (hwcap & HWCAP_PMULL)
-    setCPUFeature(FEAT_PMULL);
   if (hwcap & HWCAP_FLAGM)
     setCPUFeature(FEAT_FLAGM);
   if (hwcap2 & HWCAP2_FLAGM2) {
@@ -34,16 +32,12 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
     setCPUFeature(FEAT_FP16);
     setCPUFeature(FEAT_FP);
   }
-  if (hwcap & HWCAP_DIT)
-    setCPUFeature(FEAT_DIT);
   if (hwcap & HWCAP_ASIMDRDM)
     setCPUFeature(FEAT_RDM);
   if (hwcap & HWCAP_ILRCPC)
     setCPUFeature(FEAT_RCPC2);
   if (hwcap & HWCAP_AES)
     setCPUFeature(FEAT_AES);
-  if (hwcap & HWCAP_SHA1)
-    setCPUFeature(FEAT_SHA1);
   if (hwcap & HWCAP_SHA2)
     setCPUFeature(FEAT_SHA2);
   if (hwcap & HWCAP_JSCVT)
@@ -53,22 +47,11 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
   if (hwcap & HWCAP_SB)
     setCPUFeature(FEAT_SB);
   if (hwcap & HWCAP_SSBS)
-    setCPUFeature(FEAT_SSBS2);
-  if (hwcap2 & HWCAP2_MTE) {
+    setCPUFeature(FEAT_SSBS);
+  if (hwcap2 & HWCAP2_MTE)
     setCPUFeature(FEAT_MEMTAG);
-    setCPUFeature(FEAT_MEMTAG2);
-  }
-  if (hwcap2 & HWCAP2_MTE3) {
-    setCPUFeature(FEAT_MEMTAG);
-    setCPUFeature(FEAT_MEMTAG2);
-    setCPUFeature(FEAT_MEMTAG3);
-  }
   if (hwcap2 & HWCAP2_SVEAES)
     setCPUFeature(FEAT_SVE_AES);
-  if (hwcap2 & HWCAP2_SVEPMULL) {
-    setCPUFeature(FEAT_SVE_AES);
-    setCPUFeature(FEAT_SVE_PMULL128);
-  }
   if (hwcap2 & HWCAP2_SVEBITPERM)
     setCPUFeature(FEAT_SVE_BITPERM);
   if (hwcap2 & HWCAP2_SVESHA3)
@@ -83,22 +66,12 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
     setCPUFeature(FEAT_RNG);
   if (hwcap2 & HWCAP2_I8MM)
     setCPUFeature(FEAT_I8MM);
-  if (hwcap2 & HWCAP2_EBF16)
-    setCPUFeature(FEAT_EBF16);
-  if (hwcap2 & HWCAP2_SVE_EBF16)
-    setCPUFeature(FEAT_SVE_EBF16);
-  if (hwcap2 & HWCAP2_DGH)
-    setCPUFeature(FEAT_DGH);
   if (hwcap2 & HWCAP2_FRINT)
     setCPUFeature(FEAT_FRINTTS);
-  if (hwcap2 & HWCAP2_SVEI8MM)
-    setCPUFeature(FEAT_SVE_I8MM);
   if (hwcap2 & HWCAP2_SVEF32MM)
     setCPUFeature(FEAT_SVE_F32MM);
   if (hwcap2 & HWCAP2_SVEF64MM)
     setCPUFeature(FEAT_SVE_F64MM);
-  if (hwcap2 & HWCAP2_BTI)
-    setCPUFeature(FEAT_BTI);
   if (hwcap2 & HWCAP2_RPRES)
     setCPUFeature(FEAT_RPRES);
   if (hwcap2 & HWCAP2_WFXT)
@@ -141,9 +114,6 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
       // ID_AA64ZFR0_EL1.SVEver == 0b0001
       if (extractBits(ftr, 0, 4) == 0x1)
         setCPUFeature(FEAT_SVE2);
-      // ID_AA64ZFR0_EL1.BF16 != 0b0000
-      if (extractBits(ftr, 20, 4) != 0x0)
-        setCPUFeature(FEAT_SVE_BF16);
     }
     getCPUFeature(ID_AA64ISAR0_EL1, ftr);
     // ID_AA64ISAR0_EL1.SHA3 != 0b0000
@@ -168,12 +138,6 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
     // ID_AA64ISAR1_EL1.LS64 >= 0b0001
     if (extractBits(ftr, 60, 4) >= 0x1)
       setCPUFeature(FEAT_LS64);
-    // ID_AA64ISAR1_EL1.LS64 >= 0b0010
-    if (extractBits(ftr, 60, 4) >= 0x2)
-      setCPUFeature(FEAT_LS64_V);
-    // ID_AA64ISAR1_EL1.LS64 >= 0b0011
-    if (extractBits(ftr, 60, 4) >= 0x3)
-      setCPUFeature(FEAT_LS64_ACCDATA);
   } else {
     // Set some features in case of no CPUID support
     if (hwcap & (HWCAP_FP | HWCAP_FPHP)) {
@@ -187,8 +151,6 @@ static void __init_cpu_features_constructor(unsigned long hwcap,
       setCPUFeature(FEAT_RCPC);
     if (hwcap2 & HWCAP2_BF16 || hwcap2 & HWCAP2_EBF16)
       setCPUFeature(FEAT_BF16);
-    if (hwcap2 & HWCAP2_SVEBF16)
-      setCPUFeature(FEAT_SVE_BF16);
     if (hwcap2 & HWCAP2_SVE2 && hwcap & HWCAP_SVE)
       setCPUFeature(FEAT_SVE2);
     if (hwcap & HWCAP_SHA3)