diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 76 |
1 files changed, 47 insertions, 29 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index 7fe4d414e3..a40ca86e40 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -93,43 +93,61 @@ Cambridge, MA 02139, USA. */ (2 * movl is less expensive than pushl + popl). Second unlike for the other registers we don't save the content of - %ecx and %edx when we have than 1 and 2 registers resp. */ + %ecx and %edx when we have than 1 and 2 registers resp. + + The code below might look a bit long but we have to take care for + the pipelined processors (i586 and up). Here the `pushl' and `popl' + instructions are marked as NP (not pairable) but the exception is + two consecutive of these instruction. This gives no penalty on + i386 and i486 processors though. */ #undef DO_CALL #define DO_CALL(args) \ + PUSHARGS_##args \ DOARGS_##args \ - int $0x80; \ - UNDOARGS_##args + int $0x80 \ + POPARGS_##args +#define PUSHARGS_0 /* No arguments to push. */ #define DOARGS_0 /* No arguments to frob. */ -#define UNDOARGS_0 /* No arguments to unfrob. */ -#define _DOARGS_0(n) /* No arguments to frob. */ -#define _UNDOARGS_0 /* No arguments to unfrob. */ - -#define DOARGS_1 movl %ebx, %edx; movl 4(%esp), %ebx; DOARGS_0 -#define UNDOARGS_1 UNDOARGS_0; movl %edx, %ebx -#define _DOARGS_1(n) pushl %ebx; movl n+4(%esp), %ebx; _DOARGS_0 (n) -#define _UNDOARGS_1 _UNDOARGS_0; popl %ebx - -#define DOARGS_2 movl 8(%esp), %ecx; DOARGS_1 -#define UNDOARGS_2 UNDOARGS_1 +#define POPARGS_0 /* No arguments to pop. */ +#define _PUSHARGS_0 /* No arguments to push. */ +#define _DOARGS_0(n) /* No arguments to frob. */ +#define _POPARGS_0 /* No arguments to pop. */ + +#define PUSHARGS_1 movl %ebx, %edx; PUSHARGS_0 +#define DOARGS_1 _DOARGS_1 (4) +#define POPARGS_1 POPARGS_0; movl %edx, %ebx +#define _PUSHARGS_1 pushl %ebx; _PUSHARGS_0 +#define _DOARGS_1(n) movl n(%esp), %ebx; _DOARGS_0(n-4) +#define _POPARGS_1 _POPARGS_0; popl %ebx + +#define PUSHARGS_2 PUSHARGS_1 +#define DOARGS_2 _DOARGS_2 (8) +#define POPARGS_2 POPARGS_1 +#define _PUSHARGS_2 _PUSHARGS_1 #define _DOARGS_2(n) movl n(%esp), %ecx; _DOARGS_1 (n-4) -#define _UNDOARGS_2 _UNDOARGS_1 +#define _POPARGS_2 _POPARGS_1 -#define DOARGS_3 _DOARGS_3 (12) -#define UNDOARGS_3 _UNDOARGS_3 +#define PUSHARGS_3 _PUSHARGS_2 +#define DOARGS_3 _DOARGS_3 (16) +#define POPARGS_3 _POPARGS_3 +#define _PUSHARGS_3 _PUSHARGS_2 #define _DOARGS_3(n) movl n(%esp), %edx; _DOARGS_2 (n-4) -#define _UNDOARGS_3 _UNDOARGS_2 - -#define DOARGS_4 _DOARGS_4 (16) -#define UNDOARGS_4 _UNDOARGS_4 -#define _DOARGS_4(n) pushl %esi; movl n+4(%esp), %esi; _DOARGS_3 (n) -#define _UNDOARGS_4 _UNDOARGS_3; popl %esi - -#define DOARGS_5 _DOARGS_5 (20) -#define UNDOARGS_5 _UNDOARGS_5 -#define _DOARGS_5(n) pushl %edi; movl n+4(%esp), %edi; _DOARGS_4 (n) -#define _UNDOARGS_5 _UNDOARGS_4; popl %edi - +#define _POPARGS_3 _POPARGS_2 + +#define PUSHARGS_4 _PUSHARGS_4 +#define DOARGS_4 _DOARGS_4 (24) +#define POPARGS_4 _POPARGS_4 +#define _PUSHARGS_4 pushl %esi; _PUSHARGS_3 +#define _DOARGS_4(n) movl n(%esp), %esi; _DOARGS_3 (n-4) +#define _POPARGS_4 _POPARGS_3; popl %esi + +#define PUSHARGS_5 _PUSHARGS_5 +#define DOARGS_5 _DOARGS_5 (32) +#define POPARGS_5 _POPARGS_5 +#define _PUSHARGS_5 pushl %edi; _PUSHARGS_4 +#define _DOARGS_5(n) movl n(%esp), %edi; _DOARGS_4 (n-4) +#define _POPARGS_5 _POPARGS_4; popl %edi #endif /* ASSEMBLER */ |