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powerpc/math-emu: Update macros from GCC
The add_ssaaaa, sub_ddmmss, umul_ppmm and udiv_qrnnd macros originate
from GCC's longlong.h which in turn was copied from GMP's longlong.h a
few decades ago.
This was found when compiling with clang:
arch/powerpc/math-emu/fnmsub.c:46:2: error: invalid use of a cast in a
inline asm context requiring an l-value: remove the cast or build with
-fheinous-gnu-extensions
FP_ADD_D(R, T, B);
^~~~~~~~~~~~~~~~~
...
./arch/powerpc/include/asm/sfp-machine.h:283:27: note: expanded from
macro 'sub_ddmmss'
: "=r" ((USItype)(sh)), \
~~~~~~~~~~^~~
Segher points out: this was fixed in GCC over 16 years ago
( https://gcc.gnu.org/r56600 ), and in GMP (where it comes from)
presumably before that.
Update the add_ssaaaa, sub_ddmmss, umul_ppmm and udiv_qrnnd macros to
the latest GCC version in order to git rid of the invalid casts. These
were taken as-is from GCC's longlong in order to make future syncs
obvious. Other parts of sfp-machine.h were left as-is as the file
contains more features than present in longlong.h.
Link: https://github.com/ClangBuiltLinux/linux/issues/260
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Joel Stanley
Michael Ellerman
parent
afa202b6bd
commit
b682c86924
@ -213,30 +213,18 @@
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* respectively. The result is placed in HIGH_SUM and LOW_SUM. Overflow
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* (i.e. carry out) is not stored anywhere, and is lost.
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*/
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#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
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#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
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do { \
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if (__builtin_constant_p (bh) && (bh) == 0) \
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__asm__ ("{a%I4|add%I4c} %1,%3,%4\n\t{aze|addze} %0,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "%r" ((USItype)(ah)), \
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"%r" ((USItype)(al)), \
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"rI" ((USItype)(bl))); \
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else if (__builtin_constant_p (bh) && (bh) ==~(USItype) 0) \
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__asm__ ("{a%I4|add%I4c} %1,%3,%4\n\t{ame|addme} %0,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "%r" ((USItype)(ah)), \
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"%r" ((USItype)(al)), \
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"rI" ((USItype)(bl))); \
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__asm__ ("add%I4c %1,%3,%4\n\taddze %0,%2" \
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: "=r" (sh), "=&r" (sl) : "r" (ah), "%r" (al), "rI" (bl));\
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else if (__builtin_constant_p (bh) && (bh) == ~(USItype) 0) \
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__asm__ ("add%I4c %1,%3,%4\n\taddme %0,%2" \
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: "=r" (sh), "=&r" (sl) : "r" (ah), "%r" (al), "rI" (bl));\
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else \
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__asm__ ("{a%I5|add%I5c} %1,%4,%5\n\t{ae|adde} %0,%2,%3" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "%r" ((USItype)(ah)), \
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"r" ((USItype)(bh)), \
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"%r" ((USItype)(al)), \
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"rI" ((USItype)(bl))); \
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__asm__ ("add%I5c %1,%4,%5\n\tadde %0,%2,%3" \
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: "=r" (sh), "=&r" (sl) \
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: "%r" (ah), "r" (bh), "%r" (al), "rI" (bl)); \
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} while (0)
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/* sub_ddmmss is used in op-2.h and udivmodti4.c and should be equivalent to
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@ -248,44 +236,24 @@
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* and LOW_DIFFERENCE. Overflow (i.e. carry out) is not stored anywhere,
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* and is lost.
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*/
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#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
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#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
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do { \
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if (__builtin_constant_p (ah) && (ah) == 0) \
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__asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{sfze|subfze} %0,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "r" ((USItype)(bh)), \
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"rI" ((USItype)(al)), \
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"r" ((USItype)(bl))); \
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else if (__builtin_constant_p (ah) && (ah) ==~(USItype) 0) \
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__asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{sfme|subfme} %0,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "r" ((USItype)(bh)), \
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"rI" ((USItype)(al)), \
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"r" ((USItype)(bl))); \
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__asm__ ("subf%I3c %1,%4,%3\n\tsubfze %0,%2" \
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: "=r" (sh), "=&r" (sl) : "r" (bh), "rI" (al), "r" (bl));\
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else if (__builtin_constant_p (ah) && (ah) == ~(USItype) 0) \
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__asm__ ("subf%I3c %1,%4,%3\n\tsubfme %0,%2" \
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: "=r" (sh), "=&r" (sl) : "r" (bh), "rI" (al), "r" (bl));\
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else if (__builtin_constant_p (bh) && (bh) == 0) \
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__asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{ame|addme} %0,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "r" ((USItype)(ah)), \
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"rI" ((USItype)(al)), \
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"r" ((USItype)(bl))); \
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else if (__builtin_constant_p (bh) && (bh) ==~(USItype) 0) \
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__asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{aze|addze} %0,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "r" ((USItype)(ah)), \
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"rI" ((USItype)(al)), \
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"r" ((USItype)(bl))); \
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__asm__ ("subf%I3c %1,%4,%3\n\taddme %0,%2" \
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: "=r" (sh), "=&r" (sl) : "r" (ah), "rI" (al), "r" (bl));\
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else if (__builtin_constant_p (bh) && (bh) == ~(USItype) 0) \
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__asm__ ("subf%I3c %1,%4,%3\n\taddze %0,%2" \
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: "=r" (sh), "=&r" (sl) : "r" (ah), "rI" (al), "r" (bl));\
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else \
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__asm__ ("{sf%I4|subf%I4c} %1,%5,%4\n\t{sfe|subfe} %0,%3,%2" \
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: "=r" ((USItype)(sh)), \
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"=&r" ((USItype)(sl)) \
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: "r" ((USItype)(ah)), \
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"r" ((USItype)(bh)), \
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"rI" ((USItype)(al)), \
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"r" ((USItype)(bl))); \
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__asm__ ("subf%I4c %1,%5,%4\n\tsubfe %0,%3,%2" \
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: "=r" (sh), "=&r" (sl) \
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: "r" (ah), "r" (bh), "rI" (al), "r" (bl)); \
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} while (0)
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/* asm fragments for mul and div */
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@ -294,13 +262,10 @@
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* UWtype integers MULTIPLER and MULTIPLICAND, and generates a two UWtype
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* word product in HIGH_PROD and LOW_PROD.
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*/
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#define umul_ppmm(ph, pl, m0, m1) \
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#define umul_ppmm(ph, pl, m0, m1) \
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do { \
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USItype __m0 = (m0), __m1 = (m1); \
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__asm__ ("mulhwu %0,%1,%2" \
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: "=r" ((USItype)(ph)) \
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: "%r" (__m0), \
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"r" (__m1)); \
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__asm__ ("mulhwu %0,%1,%2" : "=r" (ph) : "%r" (m0), "r" (m1)); \
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(pl) = __m0 * __m1; \
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} while (0)
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@ -312,9 +277,10 @@
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* significant bit of DENOMINATOR must be 1, then the pre-processor symbol
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* UDIV_NEEDS_NORMALIZATION is defined to 1.
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*/
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#define udiv_qrnnd(q, r, n1, n0, d) \
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#define udiv_qrnnd(q, r, n1, n0, d) \
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do { \
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UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m; \
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UWtype __d1, __d0, __q1, __q0; \
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UWtype __r1, __r0, __m; \
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__d1 = __ll_highpart (d); \
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__d0 = __ll_lowpart (d); \
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\
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@ -325,7 +291,7 @@
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if (__r1 < __m) \
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{ \
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__q1--, __r1 += (d); \
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if (__r1 >= (d)) /* we didn't get carry when adding to __r1 */ \
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if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
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if (__r1 < __m) \
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__q1--, __r1 += (d); \
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} \
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