diff options
| -rw-r--r-- | compiler-rt/lib/builtins/clzdi2.c | 9 | ||||
| -rw-r--r-- | compiler-rt/lib/builtins/ctzdi2.c | 9 |
2 files changed, 14 insertions, 4 deletions
diff --git a/compiler-rt/lib/builtins/clzdi2.c b/compiler-rt/lib/builtins/clzdi2.c index b56d98f5c01..1819e6be436 100644 --- a/compiler-rt/lib/builtins/clzdi2.c +++ b/compiler-rt/lib/builtins/clzdi2.c @@ -16,8 +16,13 @@ /* Returns: the number of leading 0-bits */ -#if !defined(__clang__) && (defined(__sparc64__) || defined(__mips64) || defined(__riscv__)) -/* gcc resolves __builtin_clz -> __clzdi2 leading to infinite recursion */ +#if !defined(__clang__) && \ + ((defined(__sparc__) && defined(__arch64__)) || \ + defined(__mips64) || \ + (defined(__riscv) && __SIZEOF_POINTER__ >= 8)) +/* On 64-bit architectures with neither a native clz instruction nor a native + * ctz instruction, gcc resolves __builtin_clz to __clzdi2 rather than + * __clzsi2, leading to infinite recursion. */ #define __builtin_clz(a) __clzsi2(a) extern si_int __clzsi2(si_int); #endif diff --git a/compiler-rt/lib/builtins/ctzdi2.c b/compiler-rt/lib/builtins/ctzdi2.c index eecde29718d..ef6d7fea136 100644 --- a/compiler-rt/lib/builtins/ctzdi2.c +++ b/compiler-rt/lib/builtins/ctzdi2.c @@ -16,8 +16,13 @@ /* Returns: the number of trailing 0-bits */ -#if !defined(__clang__) && (defined(__sparc64__) || defined(__mips64) || defined(__riscv__)) -/* gcc resolves __builtin_ctz -> __ctzdi2 leading to infinite recursion */ +#if !defined(__clang__) && \ + ((defined(__sparc__) && defined(__arch64__)) || \ + defined(__mips64) || \ + (defined(__riscv) && __SIZEOF_POINTER__ >= 8)) +/* On 64-bit architectures with neither a native clz instruction nor a native + * ctz instruction, gcc resolves __builtin_ctz to __ctzdi2 rather than + * __ctzsi2, leading to infinite recursion. */ #define __builtin_ctz(a) __ctzsi2(a) extern si_int __ctzsi2(si_int); #endif |
