[compiler-rt] [builtins] Support building the 128-bit float functions on ld80 platforms (PR #68132)
Sean Perry via llvm-commits
llvm-commits at lists.llvm.org
Thu Jan 4 11:21:35 PST 2024
perry-ca wrote:
Hi Alex. Thanks for the quick reply. I have attached two sets of macros. We have two different representations of the floating point types on z/OS. We have the usual IEEE and another one called hexadecimal. See https://en.wikipedia.org/wiki/IBM_hexadecimal_floating-point for details if you are interested. I can answer questions too. We’ll have an RFC for adding this shortly too.
We compile the multc3.c source file twice and produce __multc3 for IEEE and __multhc3 for hexfloat. The same thing is done for the other floating point related source files including divtc3.c.
I have also attached a diff of changes I have been working with to get things building again. I suspect the change for ‘__LDBL_MANT_DIG__ == 113’ will need to be changed. I don’t think what I have works for float80.
Thanks
From: Alexander Richardson ***@***.***>
Sent: Thursday, January 4, 2024 2:04 PM
To: llvm/llvm-project ***@***.***>
Cc: Sean Perry ***@***.***>; Mention ***@***.***>
Subject: [EXTERNAL] Re: [llvm/llvm-project] [builtins] Support building the 128-bit float functions on ld80 platforms (PR #68132)
@perry-ca Could you give me a dump of the compiler predefined macros? The builtins headers should define CRT_HAS_TF_MODE if you have both 128-bit floats and 128-bit integers. — Reply to this email directly, view it on GitHub, or unsubscribe. You
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@perry-ca<https://github.com/perry-ca> Could you give me a dump of the compiler predefined macros? The builtins headers should define CRT_HAS_TF_MODE if you have both 128-bit floats and 128-bit integers.
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diff --git a/compiler-rt/lib/builtins/divtc3.c b/compiler-rt/lib/builtins/divtc3.c
index 7d3185c9d71f..e970cef574b2 100644
--- a/compiler-rt/lib/builtins/divtc3.c
+++ b/compiler-rt/lib/builtins/divtc3.c
@@ -13,6 +13,8 @@
#define QUAD_PRECISION
#include "fp_lib.h"
+#if defined(CRT_HAS_TF_MODE)
+
// Returns: the quotient of (a + ib) / (c + id)
COMPILER_RT_ABI Qcomplex __divtc3(fp_t __a, fp_t __b, fp_t __c, fp_t __d) {
@@ -50,3 +52,5 @@ COMPILER_RT_ABI Qcomplex __divtc3(fp_t __a, fp_t __b, fp_t __c, fp_t __d) {
}
return z;
}
+
+#endif
diff --git a/compiler-rt/lib/builtins/fp_lib.h b/compiler-rt/lib/builtins/fp_lib.h
index b92e8b5b9f68..c78bfd0599a7 100644
--- a/compiler-rt/lib/builtins/fp_lib.h
+++ b/compiler-rt/lib/builtins/fp_lib.h
@@ -207,8 +207,6 @@ static __inline void wideMultiply(rep_t a, rep_t b, rep_t *hi, rep_t *lo) {
#undef Word_HiMask
#undef Word_LoMask
#undef Word_FullMask
-#else
-typedef long double fp_t;
#endif // defined(CRT_HAS_TF_MODE)
#else
#error SINGLE_PRECISION, DOUBLE_PRECISION or QUAD_PRECISION must be defined.
@@ -482,10 +480,10 @@ static __inline fp_t __compiler_rt_fmax(fp_t x, fp_t y) {
#endif
}
-#elif defined(QUAD_PRECISION)
+#elif defined(QUAD_PRECISION) && defined(CRT_HAS_TF_MODE)
// The generic implementation only works for ieee754 floating point. For other
// floating point types, continue to rely on the libm implementation for now.
-#if defined(CRT_HAS_TF_MODE) && defined(CRT_HAS_IEEE_TF)
+#if defined(CRT_HAS_IEEE_TF)
static __inline tf_float __compiler_rt_logbtf(tf_float x) {
return __compiler_rt_logbX(x);
}
@@ -513,11 +511,9 @@ static __inline tf_float __compiler_rt_fmaxtf(tf_float x, tf_float y) {
#define __compiler_rt_logbl crt_logbl
#define __compiler_rt_scalbnl crt_scalbnl
#define __compiler_rt_fmaxl crt_fmaxl
-#define crt_fabstf crt_fabsl
-#define crt_copysigntf crt_copysignl
#else
#error Unsupported TF mode type
-#endif // CRT_HAS_IEEE_TF
+#endif
#endif // *_PRECISION
diff --git a/compiler-rt/lib/builtins/int_types.h b/compiler-rt/lib/builtins/int_types.h
index b35b07ff0f09..5dd0a4c3e668 100644
--- a/compiler-rt/lib/builtins/int_types.h
+++ b/compiler-rt/lib/builtins/int_types.h
@@ -192,7 +192,7 @@ typedef long double tf_float;
#define CRT_LDBL_IEEE_F128
#endif
#define TF_C(x) x##L
-#elif __SIZEOF_LONG_DOUBLE__ == 16
+#elif __LDBL_MANT_DIG__ == 113
// Use long double instead of __float128 if it matches the IEEE 128-bit format.
#define CRT_LDBL_128BIT
#define CRT_HAS_F128
diff --git a/compiler-rt/lib/builtins/multc3.c b/compiler-rt/lib/builtins/multc3.c
index 21c522d0330b..f20e53ccbf23 100644
--- a/compiler-rt/lib/builtins/multc3.c
+++ b/compiler-rt/lib/builtins/multc3.c
@@ -15,6 +15,8 @@
#include "int_lib.h"
#include "int_math.h"
+#if defined(CRT_HAS_TF_MODE)
+
// Returns: the product of a + ib and c + id
COMPILER_RT_ABI Qcomplex __multc3(fp_t a, fp_t b, fp_t c, fp_t d) {
@@ -64,3 +66,5 @@ COMPILER_RT_ABI Qcomplex __multc3(fp_t a, fp_t b, fp_t c, fp_t d) {
}
return z;
}
+
+#endif
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#define __CHAR_BIT__ 8
#define __CHAR_UNSIGNED__ 1
#define __CLANG_ATOMIC_BOOL_LOCK_FREE 2
#define __CLANG_ATOMIC_CHAR16_T_LOCK_FREE 2
#define __CLANG_ATOMIC_CHAR32_T_LOCK_FREE 2
#define __CLANG_ATOMIC_CHAR_LOCK_FREE 2
#define __CLANG_ATOMIC_INT_LOCK_FREE 2
#define __CLANG_ATOMIC_LLONG_LOCK_FREE 2
#define __CLANG_ATOMIC_LONG_LOCK_FREE 2
#define __CLANG_ATOMIC_POINTER_LOCK_FREE 2
#define __CLANG_ATOMIC_SHORT_LOCK_FREE 2
#define __CLANG_ATOMIC_WCHAR_T_LOCK_FREE 2
#define __COMPILER_VER__ 0x50000000
#define __CONSTANT_CFSTRINGS__ 1
#define __DBL_DECIMAL_DIG__ 17
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __DBL_DIG__ 15
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __DBL_HAS_DENORM__ 1
#define __DBL_HAS_INFINITY__ 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __DBL_MANT_DIG__ 53
#define __DBL_MAX_10_EXP__ 308
#define __DBL_MAX_EXP__ 1024
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_MIN_10_EXP__ (-307)
#define __DBL_MIN_EXP__ (-1021)
#define __DBL_MIN__ 2.2250738585072014e-308
#define __DECIMAL_DIG__ __LDBL_DECIMAL_DIG__
#define __FINITE_MATH_ONLY__ 0
#define __FLT_DECIMAL_DIG__ 9
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __FLT_DIG__ 6
#define __FLT_EPSILON__ 1.19209290e-7F
#define __FLT_HAS_DENORM__ 1
#define __FLT_HAS_INFINITY__ 1
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MANT_DIG__ 24
#define __FLT_MAX_10_EXP__ 38
#define __FLT_MAX_EXP__ 128
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MIN_10_EXP__ (-37)
#define __FLT_MIN_EXP__ (-125)
#define __FLT_MIN__ 1.17549435e-38F
#define __FLT_RADIX__ 2
#define __FPCLASS_NEGINF 0x0004
#define __FPCLASS_NEGNORMAL 0x0008
#define __FPCLASS_NEGSUBNORMAL 0x0010
#define __FPCLASS_NEGZERO 0x0020
#define __FPCLASS_POSINF 0x0200
#define __FPCLASS_POSNORMAL 0x0100
#define __FPCLASS_POSSUBNORMAL 0x0080
#define __FPCLASS_POSZERO 0x0040
#define __FPCLASS_QNAN 0x0002
#define __FPCLASS_SNAN 0x0001
#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
#define __GCC_ATOMIC_INT_LOCK_FREE 2
#define __GCC_ATOMIC_LLONG_LOCK_FREE 2
#define __GCC_ATOMIC_LONG_LOCK_FREE 2
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __GNUC_MINOR__ 2
#define __GNUC_PATCHLEVEL__ 1
#define __GNUC_STDC_INLINE__ 1
#define __GNUC__ 4
#define __GOFF__ 1
#define __GXX_ABI_VERSION 1002
#define __HTM__ 1
#define __INT16_C_SUFFIX__
#define __INT16_FMTd__ "hd"
#define __INT16_FMTi__ "hi"
#define __INT16_MAX__ 32767
#define __INT16_TYPE__ short
#define __INT32_C_SUFFIX__
#define __INT32_FMTd__ "d"
#define __INT32_FMTi__ "i"
#define __INT32_MAX__ 2147483647
#define __INT32_TYPE__ int
#define __INT64_C_SUFFIX__ L
#define __INT64_FMTd__ "ld"
#define __INT64_FMTi__ "li"
#define __INT64_MAX__ 9223372036854775807L
#define __INT64_TYPE__ long int
#define __INT8_C_SUFFIX__
#define __INT8_FMTd__ "hhd"
#define __INT8_FMTi__ "hhi"
#define __INT8_MAX__ 127
#define __INT8_TYPE__ signed char
#define __INTMAX_C_SUFFIX__ L
#define __INTMAX_FMTd__ "ld"
#define __INTMAX_FMTi__ "li"
#define __INTMAX_MAX__ 9223372036854775807L
#define __INTMAX_TYPE__ long int
#define __INTMAX_WIDTH__ 64
#define __INTPTR_FMTd__ "ld"
#define __INTPTR_FMTi__ "li"
#define __INTPTR_MAX__ 9223372036854775807L
#define __INTPTR_TYPE__ long int
#define __INTPTR_WIDTH__ 64
#define __INT_FAST16_FMTd__ "d"
#define __INT_FAST16_FMTi__ "i"
#define __INT_FAST16_MAX__ 2147483647
#define __INT_FAST16_TYPE__ int
#define __INT_FAST16_WIDTH__ 32
#define __INT_FAST32_FMTd__ "d"
#define __INT_FAST32_FMTi__ "i"
#define __INT_FAST32_MAX__ 2147483647
#define __INT_FAST32_TYPE__ int
#define __INT_FAST32_WIDTH__ 32
#define __INT_FAST64_FMTd__ "ld"
#define __INT_FAST64_FMTi__ "li"
#define __INT_FAST64_MAX__ 9223372036854775807L
#define __INT_FAST64_TYPE__ long int
#define __INT_FAST64_WIDTH__ 64
#define __INT_FAST8_FMTd__ "hhd"
#define __INT_FAST8_FMTi__ "hhi"
#define __INT_FAST8_MAX__ 127
#define __INT_FAST8_TYPE__ signed char
#define __INT_FAST8_WIDTH__ 8
#define __INT_LEAST16_FMTd__ "hd"
#define __INT_LEAST16_FMTi__ "hi"
#define __INT_LEAST16_MAX__ 32767
#define __INT_LEAST16_TYPE__ short
#define __INT_LEAST16_WIDTH__ 16
#define __INT_LEAST32_FMTd__ "d"
#define __INT_LEAST32_FMTi__ "i"
#define __INT_LEAST32_MAX__ 2147483647
#define __INT_LEAST32_TYPE__ int
#define __INT_LEAST32_WIDTH__ 32
#define __INT_LEAST64_FMTd__ "ld"
#define __INT_LEAST64_FMTi__ "li"
#define __INT_LEAST64_MAX__ 9223372036854775807L
#define __INT_LEAST64_TYPE__ long int
#define __INT_LEAST64_WIDTH__ 64
#define __INT_LEAST8_FMTd__ "hhd"
#define __INT_LEAST8_FMTi__ "hhi"
#define __INT_LEAST8_MAX__ 127
#define __INT_LEAST8_TYPE__ signed char
#define __INT_LEAST8_WIDTH__ 8
#define __INT_MAX__ 2147483647
#define __INT_WIDTH__ 32
#define __LDBL_DECIMAL_DIG__ 36
#define __LDBL_DENORM_MIN__ 6.47517511943802511092443895822764655e-4966L
#define __LDBL_DIG__ 33
#define __LDBL_EPSILON__ 1.92592994438723585305597794258492732e-34L
#define __LDBL_HAS_DENORM__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __LDBL_MANT_DIG__ 113
#define __LDBL_MAX_10_EXP__ 4932
#define __LDBL_MAX_EXP__ 16384
#define __LDBL_MAX__ 1.18973149535723176508575932662800702e+4932L
#define __LDBL_MIN_10_EXP__ (-4931)
#define __LDBL_MIN_EXP__ (-16381)
#define __LDBL_MIN__ 3.36210314311209350626267781732175260e-4932L
#define __LLONG_WIDTH__ 64
#define __LONGNAME__ 1
#define __LONG_DOUBLE_128__ 1
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __LONG_MAX__ 9223372036854775807L
#define __LONG_WIDTH__ 64
#define __LP64__ 1
#define __MEMORY_SCOPE_DEVICE 1
#define __MEMORY_SCOPE_SINGLE 4
#define __MEMORY_SCOPE_SYSTEM 0
#define __MEMORY_SCOPE_WRKGRP 2
#define __MEMORY_SCOPE_WVFRNT 3
#define __MVS__ 1
#define __NO_INLINE__ 1
#define __OBJC_BOOL_IS_BOOL 0
#define __OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES 3
#define __OPENCL_MEMORY_SCOPE_DEVICE 2
#define __OPENCL_MEMORY_SCOPE_SUB_GROUP 4
#define __OPENCL_MEMORY_SCOPE_WORK_GROUP 1
#define __OPENCL_MEMORY_SCOPE_WORK_ITEM 0
#define __ORDER_BIG_ENDIAN__ 4321
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __ORDER_PDP_ENDIAN__ 3412
#define __POINTER_WIDTH__ 64
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __PTR32 1
#define __PTRDIFF_FMTd__ "ld"
#define __PTRDIFF_FMTi__ "li"
#define __PTRDIFF_MAX__ 9223372036854775807L
#define __PTRDIFF_TYPE__ long int
#define __PTRDIFF_WIDTH__ 64
#define __SCHAR_MAX__ 127
#define __SHRT_MAX__ 32767
#define __SHRT_WIDTH__ 16
#define __SIG_ATOMIC_MAX__ 2147483647
#define __SIG_ATOMIC_WIDTH__ 32
#define __SIZEOF_DOUBLE__ 8
#define __SIZEOF_FLOAT__ 4
#define __SIZEOF_INT__ 4
#define __SIZEOF_LONG_DOUBLE__ 16
#define __SIZEOF_LONG_LONG__ 8
#define __SIZEOF_LONG__ 8
#define __SIZEOF_POINTER__ 8
#define __SIZEOF_PTRDIFF_T__ 8
#define __SIZEOF_SHORT__ 2
#define __SIZEOF_SIZE_T__ 8
#define __SIZEOF_WCHAR_T__ 4
#define __SIZEOF_WINT_T__ 4
#define __SIZE_FMTX__ "lX"
#define __SIZE_FMTo__ "lo"
#define __SIZE_FMTu__ "lu"
#define __SIZE_FMTx__ "lx"
#define __SIZE_MAX__ 18446744073709551615UL
#define __SIZE_TYPE__ long unsigned int
#define __SIZE_WIDTH__ 64
#define __STDC_HOSTED__ 1
#define __STDC_UTF_16__ 1
#define __STDC_UTF_32__ 1
#define __STDC_VERSION__ 201710L
#define __STDC__ 1
#define __THW_370__ 1
#define __THW_BIG_ENDIAN__ 1
#define __TOS_390__ 1
#define __TOS_MVS__ 1
#define __UINT16_C_SUFFIX__
#define __UINT16_FMTX__ "hX"
#define __UINT16_FMTo__ "ho"
#define __UINT16_FMTu__ "hu"
#define __UINT16_FMTx__ "hx"
#define __UINT16_MAX__ 65535
#define __UINT16_TYPE__ unsigned short
#define __UINT32_C_SUFFIX__ U
#define __UINT32_FMTX__ "X"
#define __UINT32_FMTo__ "o"
#define __UINT32_FMTu__ "u"
#define __UINT32_FMTx__ "x"
#define __UINT32_MAX__ 4294967295U
#define __UINT32_TYPE__ unsigned int
#define __UINT64_C_SUFFIX__ UL
#define __UINT64_FMTX__ "lX"
#define __UINT64_FMTo__ "lo"
#define __UINT64_FMTu__ "lu"
#define __UINT64_FMTx__ "lx"
#define __UINT64_MAX__ 18446744073709551615UL
#define __UINT64_TYPE__ long unsigned int
#define __UINT8_C_SUFFIX__
#define __UINT8_FMTX__ "hhX"
#define __UINT8_FMTo__ "hho"
#define __UINT8_FMTu__ "hhu"
#define __UINT8_FMTx__ "hhx"
#define __UINT8_MAX__ 255
#define __UINT8_TYPE__ unsigned char
#define __UINTMAX_C_SUFFIX__ UL
#define __UINTMAX_FMTX__ "lX"
#define __UINTMAX_FMTo__ "lo"
#define __UINTMAX_FMTu__ "lu"
#define __UINTMAX_FMTx__ "lx"
#define __UINTMAX_MAX__ 18446744073709551615UL
#define __UINTMAX_TYPE__ long unsigned int
#define __UINTMAX_WIDTH__ 64
#define __UINTPTR_FMTX__ "lX"
#define __UINTPTR_FMTo__ "lo"
#define __UINTPTR_FMTu__ "lu"
#define __UINTPTR_FMTx__ "lx"
#define __UINTPTR_MAX__ 18446744073709551615UL
#define __UINTPTR_TYPE__ long unsigned int
#define __UINTPTR_WIDTH__ 64
#define __UINT_FAST16_FMTX__ "X"
#define __UINT_FAST16_FMTo__ "o"
#define __UINT_FAST16_FMTu__ "u"
#define __UINT_FAST16_FMTx__ "x"
#define __UINT_FAST16_MAX__ 4294967295U
#define __UINT_FAST16_TYPE__ unsigned int
#define __UINT_FAST32_FMTX__ "X"
#define __UINT_FAST32_FMTo__ "o"
#define __UINT_FAST32_FMTu__ "u"
#define __UINT_FAST32_FMTx__ "x"
#define __UINT_FAST32_MAX__ 4294967295U
#define __UINT_FAST32_TYPE__ unsigned int
#define __UINT_FAST64_FMTX__ "lX"
#define __UINT_FAST64_FMTo__ "lo"
#define __UINT_FAST64_FMTu__ "lu"
#define __UINT_FAST64_FMTx__ "lx"
#define __UINT_FAST64_MAX__ 18446744073709551615UL
#define __UINT_FAST64_TYPE__ long unsigned int
#define __UINT_FAST8_FMTX__ "hhX"
#define __UINT_FAST8_FMTo__ "hho"
#define __UINT_FAST8_FMTu__ "hhu"
#define __UINT_FAST8_FMTx__ "hhx"
#define __UINT_FAST8_MAX__ 255
#define __UINT_FAST8_TYPE__ unsigned char
#define __UINT_LEAST16_FMTX__ "hX"
#define __UINT_LEAST16_FMTo__ "ho"
#define __UINT_LEAST16_FMTu__ "hu"
#define __UINT_LEAST16_FMTx__ "hx"
#define __UINT_LEAST16_MAX__ 65535
#define __UINT_LEAST16_TYPE__ unsigned short
#define __UINT_LEAST32_FMTX__ "X"
#define __UINT_LEAST32_FMTo__ "o"
#define __UINT_LEAST32_FMTu__ "u"
#define __UINT_LEAST32_FMTx__ "x"
#define __UINT_LEAST32_MAX__ 4294967295U
#define __UINT_LEAST32_TYPE__ unsigned int
#define __UINT_LEAST64_FMTX__ "lX"
#define __UINT_LEAST64_FMTo__ "lo"
#define __UINT_LEAST64_FMTu__ "lu"
#define __UINT_LEAST64_FMTx__ "lx"
#define __UINT_LEAST64_MAX__ 18446744073709551615UL
#define __UINT_LEAST64_TYPE__ long unsigned int
#define __UINT_LEAST8_FMTX__ "hhX"
#define __UINT_LEAST8_FMTo__ "hho"
#define __UINT_LEAST8_FMTu__ "hhu"
#define __UINT_LEAST8_FMTx__ "hhx"
#define __UINT_LEAST8_MAX__ 255
#define __UINT_LEAST8_TYPE__ unsigned char
#define __USER_LABEL_PREFIX__
#define __VERSION__ "IBM Open XL C/C++ 1.Next for z/OS, version 2.1.0.0, Clang 18.0.0git ***@***.***:compiler/llvm-project.git 1a8e8b03cf973de8e071fec731dcb449324cb998)"
#define __WCHAR_MAX__ 4294967295U
#define __WCHAR_TYPE__ unsigned int
#define __WCHAR_UNSIGNED__ 1
#define __WCHAR_WIDTH__ 32
#define __WINT_MAX__ 2147483647
#define __WINT_TYPE__ int
#define __WINT_WIDTH__ 32
#define __XPLINK__ 1
#define __clang__ 1
#define __clang_major__ 18
#define __clang_minor__ 0
#define __clang_patchlevel__ 0
#define __clang_version__ "18.0.0git ***@***.***:compiler/llvm-project.git 1a8e8b03cf973de8e071fec731dcb449324cb998)"
#define __clang_wide_literal_encoding__ "UTF-32"
#define __llvm__ 1
#define __open_xl__ 1
#define __open_xl_modification__ 0
#define __open_xl_ptf_fix_level__ 0
#define __open_xl_release__ 1
#define __open_xl_ver__(v,r,m) ((unsigned int)(((v) << 24)|((r) << 16)|((m) << 8)))
#define __open_xl_version__ 2
#define __open_xl_vrm__ 0x02010000u
#define __ptr31__ __ptr32
#define __s390__ 1
#define __s390x__ 1
#define __static_assert static_assert
#define __zarch__ 1
https://github.com/llvm/llvm-project/pull/68132
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