From 41407d5e9fcf9b73d402292e64fa9db02c372b5f Mon Sep 17 00:00:00 2001 From: Lepton Wu Date: Mon, 21 Oct 2019 20:22:18 -0700 Subject: [PATCH] mapi: Inline call x86_current_tls. This saves one return and a simple benchmark which calls glGetString repeatedly on my desktop shows it improves calls per second from 123M to 141M. Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/1997 Reviewed-by: Matt Turner Signed-off-by: Lepton Wu --- src/mapi/entry_x86_tls.h | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/src/mapi/entry_x86_tls.h b/src/mapi/entry_x86_tls.h index b9386799792..58a27cef18e 100644 --- a/src/mapi/entry_x86_tls.h +++ b/src/mapi/entry_x86_tls.h @@ -33,7 +33,7 @@ #define HIDDEN #endif -#define X86_ENTRY_SIZE 16 +#define X86_ENTRY_SIZE 32 __asm__(".text"); @@ -58,9 +58,13 @@ __asm__(".balign 16\n" ".balign 16\n" \ func ":" -#define STUB_ASM_CODE(slot) \ - "call x86_current_tls\n\t" \ - "movl %gs:(%eax), %eax\n\t" \ +#define STUB_ASM_CODE(slot) \ + "call 1f\n" \ + "1:\n\t" \ + "popl %eax\n\t" \ + "addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax\n\t" \ + "movl " ENTRY_CURRENT_TABLE "@GOTNTPOFF(%eax), %eax\n\t" \ + "movl %gs:(%eax), %eax\n\t" \ "jmp *(4 * " slot ")(%eax)" #define MAPI_TMP_STUB_ASM_GCC -- 2.30.2