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Only use divdeu insn with Power7 and later.

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Merge remote-tracking branch 'remotes/rth/tags/pull-softfloat-20181104' into staging

Only use divdeu insn with Power7 and later.

# gpg: Signature made Sun 04 Nov 2018 10:05:50 GMT
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-softfloat-20181104:
  softfloat: Don't execute divdeu without power7

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-11-05 10:32:49 +00:00
commit b2f7a038bb
1 changed files with 2 additions and 2 deletions
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4
include/fpu/softfloat-macros.h
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@ -647,8 +647,8 @@ static inline uint64_t udiv_qrnnd(uint64_t *r, uint64_t n1,
asm("dlgr %0, %1" : "+r"(n) : "r"(d));
*r = n >> 64;
return n;
#elif defined(_ARCH_PPC64)
/* From Power ISA 3.0B, programming note for divdeu. */
#elif defined(_ARCH_PPC64) && defined(_ARCH_PWR7)
/* From Power ISA 2.06, programming note for divdeu. */
uint64_t q1, q2, Q, r1, r2, R;
asm("divdeu %0,%2,%4; divdu %1,%3,%4"
: "=&r"(q1), "=r"(q2)