According to:
https://software.intel.com/sites/default/files/managed/e9/b5/Knights-Corner-is-your-path-to-Knights-Landing.pdf
Knights Landing is “Based on Intel Atom core (based on Silvermont
microarchitecture) with many HPC enhancements.”
This patch replaces CPU_KNL with CPU_SLM to tune for Knights Landing.
* config/i386/i386.c (processor_alias_table): Replace CPU_KNL
with CPU_SLM.
* config/i386/i386.md (cpu): Remove knl.
---
gcc/config/i386/i386.c | 2 +-
gcc/config/i386/i386.md | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 0b785d8..57d874b 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -3351,7 +3351,7 @@ ix86_option_override_internal (bool main_args_p,
{"atom", PROCESSOR_BONNELL, CPU_ATOM, PTA_BONNELL},
{"silvermont", PROCESSOR_SILVERMONT, CPU_SLM, PTA_SILVERMONT},
{"slm", PROCESSOR_SILVERMONT, CPU_SLM, PTA_SILVERMONT},
- {"knl", PROCESSOR_KNL, CPU_KNL, PTA_KNL},
+ {"knl", PROCESSOR_KNL, CPU_SLM, PTA_KNL},
{"intel", PROCESSOR_INTEL, CPU_SLM, PTA_NEHALEM},
{"geode", PROCESSOR_GEODE, CPU_GEODE,
PTA_MMX | PTA_3DNOW | PTA_3DNOW_A | PTA_PREFETCH_SSE | PTA_PRFCHW},
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 9ffe9aa..e6c2d30 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -409,7 +409,7 @@
;; Processor type.
(define_attr "cpu" "none,pentium,pentiumpro,geode,k6,athlon,k8,core2,nehalem,
atom,slm,generic,amdfam10,bdver1,bdver2,bdver3,bdver4,
- btver2,knl"
+ btver2"
(const (symbol_ref "ix86_schedule")))
;; A basic instruction type. Refinements due to arguments to be
--
2.4.3
