From d50686de0406a88ef9112f5252103f799982e84a Mon Sep 17 00:00:00 2001 From: Andre McCurdy Date: Thu, 4 Feb 2016 14:00:00 -0800 Subject: [PATCH] avoid h asm constraint for MIPS The h asm constrain (to extract the high part of a multiplication result) has not been recognised since gcc 4.4: https://gcc.gnu.org/gcc-4.4/changes.html Drop the MIPS umul_ppmm() implementations which rely on "=h" and fall back to the older implementations (which use explicit mfhi and mflo instructions to move the high and low parts of the multiplication result into their destinations). Upstream-Status: Inappropriate [upstream has a different solution] Signed-off-by: Andre McCurdy --- longlong.h | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/longlong.h b/longlong.h index b53fbee..0193abb 100644 --- a/longlong.h +++ b/longlong.h @@ -1011,27 +1011,17 @@ extern UWtype __MPN(udiv_qrnnd) _PROTO ((UWtype *, UWtype, UWtype, UWtype)); #endif /* __m88000__ */ #if defined (__mips) && W_TYPE_SIZE == 32 -#if __GNUC__ > 2 || __GNUC_MINOR__ >= 7 -#define umul_ppmm(w1, w0, u, v) \ - __asm__ ("multu %2,%3" : "=l" (w0), "=h" (w1) : "d" (u), "d" (v)) -#else #define umul_ppmm(w1, w0, u, v) \ __asm__ ("multu %2,%3\n\tmflo %0\n\tmfhi %1" \ : "=d" (w0), "=d" (w1) : "d" (u), "d" (v)) -#endif #define UMUL_TIME 10 #define UDIV_TIME 100 #endif /* __mips */ #if (defined (__mips) && __mips >= 3) && W_TYPE_SIZE == 64 -#if __GNUC__ > 2 || __GNUC_MINOR__ >= 7 -#define umul_ppmm(w1, w0, u, v) \ - __asm__ ("dmultu %2,%3" : "=l" (w0), "=h" (w1) : "d" (u), "d" (v)) -#else #define umul_ppmm(w1, w0, u, v) \ __asm__ ("dmultu %2,%3\n\tmflo %0\n\tmfhi %1" \ : "=d" (w0), "=d" (w1) : "d" (u), "d" (v)) -#endif #define UMUL_TIME 20 #define UDIV_TIME 140 #endif /* __mips */ -- 1.9.1