diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-26 08:45:41 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-02-09 10:29:18 -0300 |
| commit | 3859a340f89e6373859251b48e3ca4e81510a922 (patch) | |
| tree | 66ba6a5086254202b975edb0549104255565107a | |
| parent | 31692eb3d7c6b0e9bf5044afeee4440ecb00cf18 (diff) | |
| download | glibc-3859a340f89e6373859251b48e3ca4e81510a922.tar glibc-3859a340f89e6373859251b48e3ca4e81510a922.tar.gz glibc-3859a340f89e6373859251b48e3ca4e81510a922.tar.bz2 glibc-3859a340f89e6373859251b48e3ca4e81510a922.zip | |
i386: sfp-machine.h: Do no use asm input cast for clang
clang by default rejects the input casts with:
error: invalid use of a cast in a inline asm context requiring an
lvalue: remove the cast or build with -fheinous-gnu-extensions
And even with -fheinous-gnu-extensions clang still throws an warning
and also states that this option might be removed in the future.
For gcc the cast are still useful [1] as type-checking.
[1] https://gcc.gnu.org/pipermail/gcc-patches/2021-October/581722.html
| -rw-r--r-- | sysdeps/x86/fpu/sfp-machine.h | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/sysdeps/x86/fpu/sfp-machine.h b/sysdeps/x86/fpu/sfp-machine.h index 89a73642b1..dd23c797bd 100644 --- a/sysdeps/x86/fpu/sfp-machine.h +++ b/sysdeps/x86/fpu/sfp-machine.h @@ -64,15 +64,23 @@ typedef unsigned int UTItype __attribute__ ((mode (TI))); # define _FP_WS_TYPE signed int # define _FP_I_TYPE int +/* clang does not support output constraint as lvalue, while gcc uses it as a + simple type check. */ +# ifdef __clang__ +# define __asm_output_check_type(__type, __arg) (__arg) +# else +# define __asm_output_check_type(__type, __arg) ((__type)(__arg)) +# endif + # define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ __asm__ ("add{l} {%11,%3|%3,%11}\n\t" \ "adc{l} {%9,%2|%2,%9}\n\t" \ "adc{l} {%7,%1|%1,%7}\n\t" \ "adc{l} {%5,%0|%0,%5}" \ - : "=r" ((USItype) (r3)), \ - "=&r" ((USItype) (r2)), \ - "=&r" ((USItype) (r1)), \ - "=&r" ((USItype) (r0)) \ + : "=r" __asm_output_check_type (USItype, r3), \ + "=&r" __asm_output_check_type (USItype, r2), \ + "=&r" __asm_output_check_type (USItype, r1), \ + "=&r" __asm_output_check_type (USItype, r0) \ : "%0" ((USItype) (x3)), \ "g" ((USItype) (y3)), \ "%1" ((USItype) (x2)), \ @@ -85,9 +93,9 @@ typedef unsigned int UTItype __attribute__ ((mode (TI))); __asm__ ("add{l} {%8,%2|%2,%8}\n\t" \ "adc{l} {%6,%1|%1,%6}\n\t" \ "adc{l} {%4,%0|%0,%4}" \ - : "=r" ((USItype) (r2)), \ - "=&r" ((USItype) (r1)), \ - "=&r" ((USItype) (r0)) \ + : "=r" __asm_output_check_type (USItype, r2), \ + "=&r" __asm_output_check_type (USItype, r1), \ + "=&r" __asm_output_check_type (USItype, r0) \ : "%0" ((USItype) (x2)), \ "g" ((USItype) (y2)), \ "%1" ((USItype) (x1)), \ @@ -99,10 +107,10 @@ typedef unsigned int UTItype __attribute__ ((mode (TI))); "sbb{l} {%9,%2|%2,%9}\n\t" \ "sbb{l} {%7,%1|%1,%7}\n\t" \ "sbb{l} {%5,%0|%0,%5}" \ - : "=r" ((USItype) (r3)), \ - "=&r" ((USItype) (r2)), \ - "=&r" ((USItype) (r1)), \ - "=&r" ((USItype) (r0)) \ + : "=r" __asm_output_check_type (USItype, r3), \ + "=&r" __asm_output_check_type (USItype, r2), \ + "=&r" __asm_output_check_type (USItype, r1), \ + "=&r" __asm_output_check_type (USItype, r0) \ : "0" ((USItype) (x3)), \ "g" ((USItype) (y3)), \ "1" ((USItype) (x2)), \ @@ -115,9 +123,9 @@ typedef unsigned int UTItype __attribute__ ((mode (TI))); __asm__ ("sub{l} {%8,%2|%2,%8}\n\t" \ "sbb{l} {%6,%1|%1,%6}\n\t" \ "sbb{l} {%4,%0|%0,%4}" \ - : "=r" ((USItype) (r2)), \ - "=&r" ((USItype) (r1)), \ - "=&r" ((USItype) (r0)) \ + : "=r" __asm_output_check_type (USItype, r2), \ + "=&r" __asm_output_check_type (USItype, r1), \ + "=&r" __asm_output_check_type (USItype, r0) \ : "0" ((USItype) (x2)), \ "g" ((USItype) (y2)), \ "1" ((USItype) (x1)), \ @@ -129,10 +137,10 @@ typedef unsigned int UTItype __attribute__ ((mode (TI))); "adc{l} {$0,%2|%2,0}\n\t" \ "adc{l} {$0,%1|%1,0}\n\t" \ "adc{l} {$0,%0|%0,0}" \ - : "+r" ((USItype) (x3)), \ - "+&r" ((USItype) (x2)), \ - "+&r" ((USItype) (x1)), \ - "+&r" ((USItype) (x0)) \ + : "+r" __asm_output_check_type (USItype, x3), \ + "+&r" __asm_output_check_type (USItype, x2), \ + "+&r" __asm_output_check_type (USItype, x1), \ + "+&r" __asm_output_check_type (USItype, x0) \ : "g" ((USItype) (i))) |