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That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alex.bennee@linaro.org, David Hildenbrand Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Via host-utils.h, we use a host widening multiply for 64-bit hosts, and a common subroutine for 32-bit hosts. Reviewed-by: Alex Benn=C3=A9e Reviewed-by: David Hildenbrand Signed-off-by: Richard Henderson --- include/fpu/softfloat-macros.h | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/include/fpu/softfloat-macros.h b/include/fpu/softfloat-macros.h index a35ec2893a..57845f8af0 100644 --- a/include/fpu/softfloat-macros.h +++ b/include/fpu/softfloat-macros.h @@ -83,6 +83,7 @@ this code that are retained. #define FPU_SOFTFLOAT_MACROS_H =20 #include "fpu/softfloat-types.h" +#include "qemu/host-utils.h" =20 /*------------------------------------------------------------------------= ---- | Shifts `a' right by the number of bits given in `count'. If any nonzero @@ -515,27 +516,10 @@ static inline void | `z0Ptr' and `z1Ptr'. *-------------------------------------------------------------------------= ---*/ =20 -static inline void mul64To128( uint64_t a, uint64_t b, uint64_t *z0Ptr, ui= nt64_t *z1Ptr ) +static inline void +mul64To128(uint64_t a, uint64_t b, uint64_t *z0Ptr, uint64_t *z1Ptr) { - uint32_t aHigh, aLow, bHigh, bLow; - uint64_t z0, zMiddleA, zMiddleB, z1; - - aLow =3D a; - aHigh =3D a>>32; - bLow =3D b; - bHigh =3D b>>32; - z1 =3D ( (uint64_t) aLow ) * bLow; - zMiddleA =3D ( (uint64_t) aLow ) * bHigh; - zMiddleB =3D ( (uint64_t) aHigh ) * bLow; - z0 =3D ( (uint64_t) aHigh ) * bHigh; - zMiddleA +=3D zMiddleB; - z0 +=3D ( ( (uint64_t) ( zMiddleA < zMiddleB ) )<<32 ) + ( zMiddleA>>3= 2 ); - zMiddleA <<=3D 32; - z1 +=3D zMiddleA; - z0 +=3D ( z1 < zMiddleA ); - *z1Ptr =3D z1; - *z0Ptr =3D z0; - + mulu64(z1Ptr, z0Ptr, a, b); } =20 /*------------------------------------------------------------------------= ---- --=20 2.25.1