On Sat, 2013-03-23 at 14:50 +, Richard Sandiford wrote:
This is similar in spirit to -mbranch-likely. It'd be good for consistency
if they were defined in a similar style. I think that means removing
!TARGET_MIPS16 from ISA_HAS_MADD_MSUB and instead having:
#define GENERATE_MADD_MSUB
Steve Ellcey sell...@imgtec.com writes:
On Sat, 2013-03-23 at 14:50 +, Richard Sandiford wrote:
This is similar in spirit to -mbranch-likely. It'd be good for consistency
if they were defined in a similar style. I think that means removing
!TARGET_MIPS16 from ISA_HAS_MADD_MSUB and
On Mon, 2013-03-25 at 16:45 +, Richard Sandiford wrote:
-mllsc is a little different in that it can be used even when the
ISA doesn't support it (thanks to kernel emulation). -mimadd isn't
like that though: we only want to use MADD/MSUB if the ISA has it.
So I think it makes sense to
Steve Ellcey sell...@imgtec.com writes:
On Mon, 2013-03-25 at 16:45 +, Richard Sandiford wrote:
-mllsc is a little different in that it can be used even when the
ISA doesn't support it (thanks to kernel emulation). -mimadd isn't
like that though: we only want to use MADD/MSUB if the ISA
Steve Ellcey sell...@imgtec.com writes:
* config/mips/mmips-cpus.def (74kc, 74kf2_1, 74kf, 74kf, 74kf1_1,
74kfx, 74kx, 74kf3_2): Add PTF_AVOID_IMADD.
* config/mips/mips.c (mips_option_override): Set IMADD default.
* config/mips/mips.h (PTF_AVOID_IMADD): New.
Steve Ellcey sell...@imgtec.com writes:
While testing GCC on a 74k MIPS chip I noticed that by default the -mtune=74k*
flags cause GCC to not use the integer madd/msub instructions. According to
the checkin comments these were found to cause a performance hit over using
individual mult and
While testing GCC on a 74k MIPS chip I noticed that by default the -mtune=74k*
flags cause GCC to not use the integer madd/msub instructions. According to
the checkin comments these were found to cause a performance hit over using
individual mult and add/sub instructions. I think there are some
