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include/fpu/softfloat: Fix compilation with Clang on s390x

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Clang v7.0.1 does not like the __int128 variable type for inline
assembly on s390x:

In file included from fpu/softfloat.c:97:
include/fpu/softfloat-macros.h:647:9: error: inline asm error:
This value type register class is not natively supported!
asm("dlgr %0, %1" : "+r"(n) : "r"(d));
^

Disable this code part there now when compiling with Clang, so that
the generic code gets used instead.

Backports commit 2c00542c70b9cbd6da510c97cd3d46adcf9e3efc from qemu
This commit is contained in:
Thomas Huth 2019-01-24 18:37:39 -05:00 committed by Lioncash
parent 29d84a9296
commit a7c8939b0d
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1 changed files with 1 additions and 1 deletions
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2
qemu/fpu/softfloat-macros.h
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@ -641,7 +641,7 @@ static inline uint64_t udiv_qrnnd(uint64_t *r, uint64_t n1,
uint64_t q;
asm("divq %4" : "=a"(q), "=d"(*r) : "0"(n0), "1"(n1), "rm"(d));
return q;
#elif defined(__s390x__)
#elif defined(__s390x__) && !defined(__clang__)
/* Need to use a TImode type to get an even register pair for DLGR. */
unsigned __int128 n = (unsigned __int128)n1 << 64 | n0;
asm("dlgr %0, %1" : "+r"(n) : "r"(d));