Date: Wed, 17 Jun 2015 19:57:35 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Alexander Kabaev <kabaev@gmail.com> Cc: "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org> Subject: Re: [rfc] fix umul_ppmm() in our libgcc Message-ID: <CAJ-Vmoncx=Qr_FY7qEPxK0j12_pGREG05qrk65QLk01Arf4RmQ@mail.gmail.com> In-Reply-To: <CAJ-Vmokm1anJUaZLEFpW=JpV5nec7CTuL1yPOJdZniQ53%2BArcQ@mail.gmail.com> References: <CAJ-Vmonsmu5dGtWKhJchzZfSsVUjtwEVSEij4u6kwk64E0ZOXw@mail.gmail.com> <20150616011832.146e0f0e@kan> <CAJ-Vmokm1anJUaZLEFpW=JpV5nec7CTuL1yPOJdZniQ53%2BArcQ@mail.gmail.com>
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Ok, so this:
adrian@lucy-11i386:~/work/freebsd/head-embedded-2/src/contrib/gcc %
svn diff longlong.h
Index: longlong.h
===================================================================
--- longlong.h (revision 284394)
+++ longlong.h (working copy)
@@ -584,11 +584,11 @@
#if defined (__mips__) && W_TYPE_SIZE == 32
#define umul_ppmm(w1, w0, u, v) \
- __asm__ ("multu %2,%3" \
- : "=l" ((USItype) (w0)), \
- "=h" ((USItype) (w1)) \
- : "d" ((USItype) (u)), \
- "d" ((USItype) (v)))
+ do { \
+ UDItype __x = (UDItype) (USItype) (u) * (USItype) (v); \
+ w1 = __x >> 32; \
+ w0 = __x; \
+ } while (0)
#define UMUL_TIME 10
#define UDIV_TIME 100
#endif /* __mips__ */
?
-a
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