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| author | Torbjorn Granlund <tg@gmplib.org> | 2016-12-26 17:26:25 +0100 |
|---|---|---|
| committer | Torbjorn Granlund <tg@gmplib.org> | 2016-12-26 17:26:25 +0100 |
| commit | 91fc986db8c107842ecb50c5328dff971dd02c6c (patch) | |
| tree | 519f0bb368cffc9751dfac2bef6a3ce7ca9737c8 /longlong.h | |
| parent | ecc649755bb3f873f5c877f157ac0f3ca69f8579 (diff) | |
| download | gmp-91fc986db8c107842ecb50c5328dff971dd02c6c.tar.gz | |
(x86_64 umul_ppmm): Add mulx variant (not automatically used).
Diffstat (limited to 'longlong.h')
| -rw-r--r-- | longlong.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/longlong.h b/longlong.h index f2dbfc41c..c810fce2d 100644 --- a/longlong.h +++ b/longlong.h @@ -1016,10 +1016,17 @@ extern UWtype __MPN(udiv_qrnnd) (UWtype *, UWtype, UWtype, UWtype); : "=r" (sh), "=&r" (sl) \ : "0" ((UDItype)(ah)), "rme" ((UDItype)(bh)), \ "1" ((UDItype)(al)), "rme" ((UDItype)(bl))) +#if defined (HAVE_MULX) #define umul_ppmm(w1, w0, u, v) \ - __asm__ ("mulq %3" \ + __asm__ ("mulx %3, %0, %1" \ + : "=r" (w0), "=r" (w1) \ + : "%d" ((UDItype)(u)), "rm" ((UDItype)(v))) +#else +#define umul_ppmm(w1, w0, u, v) \ + __asm__ ("mulq %3" \ : "=a" (w0), "=d" (w1) \ : "%0" ((UDItype)(u)), "rm" ((UDItype)(v))) +#endif #define udiv_qrnnd(q, r, n1, n0, dx) /* d renamed to dx avoiding "=d" */\ __asm__ ("divq %4" /* stringification in K&R C */ \ : "=a" (q), "=d" (r) \ |