Reduce header complexity

- Remove most __ASSEMBLER__ __LINKER__ ifdefs
- Rename libc/intrin/bits.h to libc/serialize.h
- Block pthread cancelation in fchmodat() polyfill
- Remove `clang-format off` statements in third_party

third_party/xed/avx512.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_THIRD_PARTY_XED_AVX512_H_
 #define COSMOPOLITAN_THIRD_PARTY_XED_AVX512_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 union XedAvx512Payload1 {
@@ -40,5 +39,4 @@ union XedAvx512Payload3 {
 };
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_XED_AVX512_H_ */

third_party/xed/private.h

@@ -1,7 +1,6 @@
 #ifndef COSMOPOLITAN_THIRD_PARTY_XED_PRIVATE_H_
 #define COSMOPOLITAN_THIRD_PARTY_XED_PRIVATE_H_
 #include "third_party/xed/x86.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 typedef int xed_int_t;
@@ -12,5 +11,4 @@ typedef intptr_t xed_addr_t;
 typedef bool xed_bool_t;
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_XED_PRIVATE_H_ */

third_party/xed/x86.h

@@ -42,7 +42,6 @@
 #define xed_sib_scale(M)           (((M)&0xff) >> 6)
 #define xed_get_modrm_reg_field(M) (((M)&0x38) >> 3)
 
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 #define XED_MACHINE_MODE_REAL           XED_MODE_REAL
@@ -246,5 +245,4 @@ int xed_instruction_length_decode(struct XedDecodedInst *, const void *,
                                   size_t);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_XED_X86_H_ */

third_party/xed/x86features.c

@@ -36,7 +36,7 @@ asm(".include \"libc/disclaimer.inc\"");
  * example, 0x2800000ul was calculated as: 1UL<<(XED_ISA_SET_I86-64) |
  * 1UL<<(XED_ISA_SET_LAHF-64).
  */
-const uint64_t kXedChipFeatures[XED_CHIP_LAST][3] /* clang-format off */ = {
+const uint64_t kXedChipFeatures[XED_CHIP_LAST][3] = {
   {0,                   0,                  0,     },
   {0,                   0x02800000,         0,     },  /*I86*/
   {0,                   0x02800000,         0x02000},  /*I86FP*/
@@ -89,4 +89,4 @@ const uint64_t kXedChipFeatures[XED_CHIP_LAST][3] /* clang-format off */ = {
   {0xfffffffc3f3fffec,  0xffffebff5fffdfb9, 0x7b79e},  /*ICEL..SERVER*/
   {0xfffffffc3f3fffec,  0xffdffbf75fffdfbb, 0x7a79e},  /*FUTURE*/
   {0xfffffffffffffffe,  0xffffffffffffffff, 0x7ffff}   /*ALL*/
-} /* clang-format on */;
+};

third_party/xed/x86ild.greg.c

@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/dce.h"
-#include "libc/intrin/bits.h"
+#include "libc/serialize.h"
 #include "libc/intrin/bsr.h"
 #include "libc/log/libfatal.internal.h"
 #include "libc/macros.internal.h"

third_party/xed/x86isa.h

@@ -1,7 +1,6 @@
 #ifndef COSMOPOLITAN_THIRD_PARTY_XED_X86ISA_H_
 #define COSMOPOLITAN_THIRD_PARTY_XED_X86ISA_H_
 #include "third_party/xed/x86.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 #define XED_CHIP_INVALID           1
@@ -257,5 +256,4 @@ void xed_get_chip_features(struct XedChipFeatures *, int);
 bool xed_isa_set_is_valid_for_chip(int, int);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_XED_X86ISA_H_ */