| 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 |
| |