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From d50686de0406a88ef9112f5252103f799982e84a Mon Sep 17 00:00:00 2001
From: Andre McCurdy <armccurdy@gmail.com>
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 <armccurdy@gmail.com>
---
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
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