diff options
| author | Hyungwoo Yang <hyungwoo.yang@intel.com> | 2019-01-30 12:30:47 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-02-26 05:09:12 -0800 |
| commit | decc9452e981a7c8ce5c6b8983061a054057c615 (patch) | |
| tree | eaea7bba6491f96bc06a77e2af2fd43d4b210894 /core/minute-ia/irq_handler.h | |
| parent | 0a3f44e4f508d0c6a96519e6db97b2f2fd4bfb23 (diff) | |
| download | chrome-ec-decc9452e981a7c8ce5c6b8983061a054057c615.tar.gz | |
ish: save/restore FPU context only for the task uses FPU
Currently we save/retore FPU H/W context for every task on
every contxt switch. This hurts overall performance of ISH.
This patch allows save and restore FPU H/W context only for
a task that declares it uses FPU.
BRANCH=none
BUG=none
TEST=verified in Atlas platform
Change-Id: Ic2f0bbf59f655661e2dd788c688edc4e83068c1c
Signed-off-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/1448818
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Hyungwoo Yang <hyungwoo.yang@intel.corp-partner.google.com>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'core/minute-ia/irq_handler.h')
| -rw-r--r-- | core/minute-ia/irq_handler.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/core/minute-ia/irq_handler.h b/core/minute-ia/irq_handler.h index c561ee472b..4df2b14da6 100644 --- a/core/minute-ia/irq_handler.h +++ b/core/minute-ia/irq_handler.h @@ -9,10 +9,20 @@ #define __CROS_EC_IRQ_HANDLER_H #include "registers.h" +#include "task_defs.h" #ifdef CONFIG_FPU -#define save_fpu_ctx "fnsave 20(%eax)\n" -#define rstr_fpu_ctx "frstor 20(%eax)\n" +#define save_fpu_ctx "movl "USE_FPU_OFFSET_STR"(%eax), %ebx\n" \ + "test %ebx, %ebx\n" \ + "jz 9f\n" \ + "fnsave "FPU_CTX_OFFSET_STR"(%eax)\n" \ + "9:\n" + +#define rstr_fpu_ctx "movl "USE_FPU_OFFSET_STR"(%eax), %ebx\n" \ + "test %ebx, %ebx\n" \ + "jz 9f\n" \ + "frstor "FPU_CTX_OFFSET_STR"(%eax)\n" \ + "9:\n" #else #define save_fpu_ctx #define rstr_fpu_ctx |