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mapi: Inline call x86_current_tls.

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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 <mattst88@gmail.com>
Signed-off-by: Lepton Wu <lepton@chromium.org>
This commit is contained in:
Lepton Wu 2019-10-21 20:22:18 -07:00 • committed by Matt Turner
parent b2b8639d8e
commit 41407d5e9f
1 changed files with 8 additions and 4 deletions
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12
src/mapi/entry_x86_tls.h
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@ -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