| Message ID | CAKjxQHnGTMutwgr0yTpViN+M_beNwBA-eEO5UV6mPkx6zi7MNQ@mail.gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
Paul Hua <paul.hua.gm@gmail.com> writes: > Loongson3a has 4 operand fused madd instrcution. This patch set > loongson3a use fused madd.d. Hi Paul, Thanks for the fix. I was vaguely aware that this was wrong for loongson-3a but never confirmed it. I suspect this change is mechanical enough that it can bypass copyright assignment but I'd need a global maintainer to comment. I've sent you copyright assignment paperwork separately. Two comments on the patch: > ChangeLog : > > *** gcc/ChangeLog *** > > 2016-11-03 Chenghua Xu <paul.hua.gm@gmail.com> > > config/mips/ > * mips.h: Set loongson3a use fused madd.d. The changelog needs to reference what was changed rather than the effect of the change: * config/mips/mips.h (ISA_HAS_FUSED_MADD4): Enable for TARGET_LOONGSON_3A. (ISA_HAS_UNFUSED_MADD4): Exclude TARGET_LOONGSON_3A. >diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h >index 81862a9..5076a2b 100644 >--- a/gcc/config/mips/mips.h >+++ b/gcc/config/mips/mips.h >@@ -1056,11 +1056,11 @@ struct mips_cpu_info { > > /* ISA has 4 operand fused madd instructions of the form > 'd = [+-] (a * b [+-] c)'. */ >-#define ISA_HAS_FUSED_MADD4 TARGET_MIPS8000 >+#define ISA_HAS_FUSED_MADD4 (TARGET_MIPS8000 || TARGET_LOONGSON_3A) > > /* ISA has 4 operand unfused madd instructions of the form > 'd = [+-] (a * b [+-] c)'. */ >-#define ISA_HAS_UNFUSED_MADD4 (ISA_HAS_FP4 && !TARGET_MIPS8000) >+#define ISA_HAS_UNFUSED_MADD4 (ISA_HAS_FP4 && !TARGET_MIPS8000 && !TARGET_LOONGSON_3A) Please split this line and move && !TARGET_LOONGSON_3A to the next line under ISA_HAS_FP4. > > /* ISA has 3 operand r6 fused madd instructions of the form > 'c = c [+-] (a * b)'. */ Thanks, Matthew
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h index 81862a9..5076a2b 100644 --- a/gcc/config/mips/mips.h +++ b/gcc/config/mips/mips.h @@ -1056,11 +1056,11 @@ struct mips_cpu_info { /* ISA has 4 operand fused madd instructions of the form 'd = [+-] (a * b [+-] c)'. */ -#define ISA_HAS_FUSED_MADD4 TARGET_MIPS8000 +#define ISA_HAS_FUSED_MADD4 (TARGET_MIPS8000 || TARGET_LOONGSON_3A) /* ISA has 4 operand unfused madd instructions of the form 'd = [+-] (a * b [+-] c)'. */ -#define ISA_HAS_UNFUSED_MADD4 (ISA_HAS_FP4 && !TARGET_MIPS8000) +#define ISA_HAS_UNFUSED_MADD4 (ISA_HAS_FP4 && !TARGET_MIPS8000 && !TARGET_LOONGSON_3A) /* ISA has 3 operand r6 fused madd instructions of the form 'c = c [+-] (a * b)'. */
Hi, Loongson3a has 4 operand fused madd instrcution. This patch set loongson3a use fused madd.d. ChangeLog : *** gcc/ChangeLog *** 2016-11-03 Chenghua Xu <paul.hua.gm@gmail.com> config/mips/ * mips.h: Set loongson3a use fused madd.d. Tested on loongson3a. PS: I will soon submit some patches, how can i get a copyright assignment.