* [PATCH] s390 (2/3): optimize s390 inline assemblies.
@ 2003-05-02 12:24 Martin Schwidefsky
0 siblings, 0 replies; only message in thread
From: Martin Schwidefsky @ 2003-05-02 12:24 UTC (permalink / raw)
To: linux-kernel, torvalds
Optimize s390 inline assemblies.
diffstat:
arch/s390/kernel/smp.c | 7 --
include/asm-s390/system.h | 147 ++++++++++++++++++++------------------------
include/asm-s390/tlbflush.h | 11 ++-
include/asm-s390/uaccess.h | 106 ++++++++++++++++---------------
4 files changed, 131 insertions(+), 140 deletions(-)
diff -urN linux-2.5.68/arch/s390/kernel/smp.c linux-2.5.68-s390/arch/s390/kernel/smp.c
--- linux-2.5.68/arch/s390/kernel/smp.c Sun Apr 20 04:48:48 2003
+++ linux-2.5.68-s390/arch/s390/kernel/smp.c Fri May 2 14:06:44 2003
@@ -512,10 +512,9 @@
cpu_lowcore->kernel_stack = (unsigned long)
idle->thread_info + (THREAD_SIZE);
__ctl_store(cpu_lowcore->cregs_save_area[0], 0, 15);
- __asm__ __volatile__("la 1,%0\n\t"
- "stam 0,15,0(1)"
- : "=m" (cpu_lowcore->access_regs_save_area[0])
- : : "1", "memory");
+ __asm__ __volatile__("stam 0,15,0(%0)"
+ : : "a" (&cpu_lowcore->access_regs_save_area)
+ : "memory");
eieio();
signal_processor(cpu,sigp_restart);
diff -urN linux-2.5.68/include/asm-s390/system.h linux-2.5.68-s390/include/asm-s390/system.h
--- linux-2.5.68/include/asm-s390/system.h Sun Apr 20 04:51:16 2003
+++ linux-2.5.68-s390/include/asm-s390/system.h Fri May 2 14:06:44 2003
@@ -25,12 +25,9 @@
#ifdef __s390x__
#define __FLAG_SHIFT 56
-extern void __misaligned_u16(void);
-extern void __misaligned_u32(void);
-extern void __misaligned_u64(void);
-#else /* __s390x__ */
+#else /* ! __s390x__ */
#define __FLAG_SHIFT 24
-#endif /* __s390x__ */
+#endif /* ! __s390x__ */
static inline void save_fp_regs(s390_fp_regs *fpregs)
{
@@ -301,56 +298,52 @@
#define __ctl_load(array, low, high) ({ \
__asm__ __volatile__ ( \
- " la 1,%0\n" \
- " bras 2,0f\n" \
- " lctlg 0,0,0(1)\n" \
- "0: ex %1,0(2)" \
- : : "m" (array), "a" (((low)<<4)+(high)) : "1", "2" ); \
+ " bras 1,0f\n" \
+ " lctlg 0,0,0(%0)\n" \
+ "0: ex %1,0(1)" \
+ : : "a" (&array), "a" (((low)<<4)+(high)) : "1" ); \
})
#define __ctl_store(array, low, high) ({ \
__asm__ __volatile__ ( \
- " la 1,%0\n" \
- " bras 2,0f\n" \
- " stctg 0,0,0(1)\n" \
- "0: ex %1,0(2)" \
- : "=m" (array) : "a" (((low)<<4)+(high)): "1", "2" ); \
+ " bras 1,0f\n" \
+ " stctg 0,0,0(%1)\n" \
+ "0: ex %2,0(1)" \
+ : "=m" (array) : "a" (&array), "a" (((low)<<4)+(high)) : "1" ); \
})
#define __ctl_set_bit(cr, bit) ({ \
__u8 __dummy[24]; \
__asm__ __volatile__ ( \
- " la 1,%0\n" /* align to 8 byte */ \
- " aghi 1,7\n" \
- " nill 1,0xfff8\n" \
- " bras 2,0f\n" /* skip indirect insns */ \
- " stctg 0,0,0(1)\n" \
- " lctlg 0,0,0(1)\n" \
- "0: ex %1,0(2)\n" /* execute stctl */ \
- " lg 0,0(1)\n" \
- " ogr 0,%2\n" /* set the bit */ \
- " stg 0,0(1)\n" \
- "1: ex %1,6(2)" /* execute lctl */ \
- : "=m" (__dummy) : "a" (cr*17), "a" (1L<<(bit)) \
- : "cc", "0", "1", "2"); \
+ " bras 1,0f\n" /* skip indirect insns */ \
+ " stctg 0,0,0(%1)\n" \
+ " lctlg 0,0,0(%1)\n" \
+ "0: ex %2,0(1)\n" /* execute stctl */ \
+ " lg 0,0(%1)\n" \
+ " ogr 0,%3\n" /* set the bit */ \
+ " stg 0,0(%1)\n" \
+ "1: ex %2,6(1)" /* execute lctl */ \
+ : "=m" (__dummy) \
+ : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+ "a" (cr*17), "a" (1L<<(bit)) \
+ : "cc", "0", "1" ); \
})
#define __ctl_clear_bit(cr, bit) ({ \
- __u8 __dummy[24]; \
+ __u8 __dummy[16]; \
__asm__ __volatile__ ( \
- " la 1,%0\n" /* align to 8 byte */ \
- " aghi 1,7\n" \
- " nill 1,0xfff8\n" \
- " bras 2,0f\n" /* skip indirect insns */ \
- " stctg 0,0,0(1)\n" \
- " lctlg 0,0,0(1)\n" \
- "0: ex %1,0(2)\n" /* execute stctl */ \
- " lg 0,0(1)\n" \
- " ngr 0,%2\n" /* set the bit */ \
- " stg 0,0(1)\n" \
- "1: ex %1,6(2)" /* execute lctl */ \
- : "=m" (__dummy) : "a" (cr*17), "a" (~(1L<<(bit))) \
- : "cc", "0", "1", "2"); \
+ " bras 1,0f\n" /* skip indirect insns */ \
+ " stctg 0,0,0(%1)\n" \
+ " lctlg 0,0,0(%1)\n" \
+ "0: ex %2,0(1)\n" /* execute stctl */ \
+ " lg 0,0(%1)\n" \
+ " ngr 0,%3\n" /* set the bit */ \
+ " stg 0,0(%1)\n" \
+ "1: ex %2,6(1)" /* execute lctl */ \
+ : "=m" (__dummy) \
+ : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+ "a" (cr*17), "a" (~(1L<<(bit))) \
+ : "cc", "0", "1" ); \
})
#else /* __s390x__ */
@@ -360,58 +353,52 @@
#define __ctl_load(array, low, high) ({ \
__asm__ __volatile__ ( \
- " la 1,%0\n" \
- " bras 2,0f\n" \
- " lctl 0,0,0(1)\n" \
- "0: ex %1,0(2)" \
- : : "m" (array), "a" (((low)<<4)+(high)) : "1", "2" ); \
+ " bras 1,0f\n" \
+ " lctl 0,0,0(%0)\n" \
+ "0: ex %1,0(1)" \
+ : : "a" (&array), "a" (((low)<<4)+(high)) : "1" ); \
})
#define __ctl_store(array, low, high) ({ \
__asm__ __volatile__ ( \
- " la 1,%0\n" \
- " bras 2,0f\n" \
- " stctl 0,0,0(1)\n" \
- "0: ex %1,0(2)" \
- : "=m" (array) : "a" (((low)<<4)+(high)): "1", "2" ); \
+ " bras 1,0f\n" \
+ " stctl 0,0,0(%1)\n" \
+ "0: ex %2,0(1)" \
+ : "=m" (array) : "a" (&array), "a" (((low)<<4)+(high)): "1" ); \
})
#define __ctl_set_bit(cr, bit) ({ \
__u8 __dummy[16]; \
__asm__ __volatile__ ( \
- " la 1,%0\n" /* align to 8 byte */ \
- " ahi 1,7\n" \
- " srl 1,3\n" \
- " sll 1,3\n" \
- " bras 2,0f\n" /* skip indirect insns */ \
- " stctl 0,0,0(1)\n" \
- " lctl 0,0,0(1)\n" \
- "0: ex %1,0(2)\n" /* execute stctl */ \
- " l 0,0(1)\n" \
- " or 0,%2\n" /* set the bit */ \
- " st 0,0(1)\n" \
- "1: ex %1,4(2)" /* execute lctl */ \
- : "=m" (__dummy) : "a" (cr*17), "a" (1<<(bit)) \
- : "cc", "0", "1", "2"); \
+ " bras 1,0f\n" /* skip indirect insns */ \
+ " stctl 0,0,0(%1)\n" \
+ " lctl 0,0,0(%1)\n" \
+ "0: ex %2,0(1)\n" /* execute stctl */ \
+ " l 0,0(%1)\n" \
+ " or 0,%3\n" /* set the bit */ \
+ " st 0,0(%1)\n" \
+ "1: ex %2,4(1)" /* execute lctl */ \
+ : "=m" (__dummy) \
+ : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+ "a" (cr*17), "a" (1<<(bit)) \
+ : "cc", "0", "1" ); \
})
#define __ctl_clear_bit(cr, bit) ({ \
__u8 __dummy[16]; \
__asm__ __volatile__ ( \
- " la 1,%0\n" /* align to 8 byte */ \
- " ahi 1,7\n" \
- " srl 1,3\n" \
- " sll 1,3\n" \
- " bras 2,0f\n" /* skip indirect insns */ \
- " stctl 0,0,0(1)\n" \
- " lctl 0,0,0(1)\n" \
- "0: ex %1,0(2)\n" /* execute stctl */ \
- " l 0,0(1)\n" \
- " nr 0,%2\n" /* set the bit */ \
- " st 0,0(1)\n" \
- "1: ex %1,4(2)" /* execute lctl */ \
- : "=m" (__dummy) : "a" (cr*17), "a" (~(1<<(bit))) \
- : "cc", "0", "1", "2"); \
+ " bras 1,0f\n" /* skip indirect insns */ \
+ " stctl 0,0,0(%1)\n" \
+ " lctl 0,0,0(%1)\n" \
+ "0: ex %2,0(1)\n" /* execute stctl */ \
+ " l 0,0(%1)\n" \
+ " nr 0,%3\n" /* set the bit */ \
+ " st 0,0(%1)\n" \
+ "1: ex %2,4(1)" /* execute lctl */ \
+ : "=m" (__dummy) \
+ : "a" ((((unsigned long) &__dummy) + 7) & ~7UL), \
+ "a" (cr*17), "a" (~(1<<(bit))) \
+ : "cc", "0", "1" ); \
})
#endif /* __s390x__ */
diff -urN linux-2.5.68/include/asm-s390/tlbflush.h linux-2.5.68-s390/include/asm-s390/tlbflush.h
--- linux-2.5.68/include/asm-s390/tlbflush.h Sun Apr 20 04:51:13 2003
+++ linux-2.5.68-s390/include/asm-s390/tlbflush.h Fri May 2 14:06:44 2003
@@ -76,13 +76,16 @@
}
#endif /* __s390x__ */
{
- long dummy = 0;
+ register unsigned long addr asm("4");
+ long dummy;
+
+ dummy = 0;
+ addr = ((unsigned long) &dummy) + 1;
__asm__ __volatile__ (
- " la 4,1(%0)\n"
" slr 2,2\n"
" slr 3,3\n"
- " csp 2,4"
- : : "a" (&dummy) : "cc", "2", "3", "4" );
+ " csp 2,%0"
+ : : "a" (addr) : "cc", "2", "3" );
}
}
diff -urN linux-2.5.68/include/asm-s390/uaccess.h linux-2.5.68-s390/include/asm-s390/uaccess.h
--- linux-2.5.68/include/asm-s390/uaccess.h Sun Apr 20 04:48:54 2003
+++ linux-2.5.68-s390/include/asm-s390/uaccess.h Fri May 2 14:06:44 2003
@@ -113,82 +113,83 @@
#define __put_user_asm_8(x, ptr, err) \
({ \
+ register __typeof__(x) const * __from asm("2"); \
+ register __typeof__(*(ptr)) * __to asm("4"); \
+ __from = &(x); \
+ __to = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 2,%2\n" \
- " la 4,%1\n" \
" sacf 512\n" \
- "0: mvc 0(8,4),0(2)\n" \
+ "0: mvc 0(8,%1),0(%2)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err) \
- : "m" (*(__u64*)(ptr)), "m" (x), "K" (-EFAULT) \
- : "cc", "2", "4" ); \
+ : "a" (__to),"a" (__from),"K" (-EFAULT),"0" (0) \
+ : "cc" ); \
})
#else /* __s390x__ */
#define __put_user_asm_8(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%1\n" \
" sacf 512\n" \
- "0: stg %2,0(4)\n" \
+ "0: stg %2,0(%1)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err) \
- : "m" (*(__u64*)(ptr)), "d" (x), "K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "d" (x), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#endif /* __s390x__ */
#define __put_user_asm_4(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%1\n" \
" sacf 512\n" \
- "0: st %2,0(4)\n" \
+ "0: st %2,0(%1)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err) \
- : "m" (*(__u32*)(ptr)), "d" (x), "K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "d" (x), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#define __put_user_asm_2(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%1\n" \
" sacf 512\n" \
- "0: sth %2,0(4)\n" \
+ "0: sth %2,0(%1)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err) \
- : "m" (*(__u16*)(ptr)), "d" (x), "K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "d" (x), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#define __put_user_asm_1(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%1\n" \
" sacf 512\n" \
- "0: stc %2,0(4)\n" \
+ "0: stc %2,0(%1)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err) \
- : "m" (*(__u8*)(ptr)), "d" (x), "K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "d" (x), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#define __put_user(x, ptr) \
@@ -223,35 +224,36 @@
#define __get_user_asm_8(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) const * __from asm("2"); \
+ register __typeof__(x) * __to asm("4"); \
+ __from = (ptr); \
+ __to = &(x); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 2,%1\n" \
- " la 4,%2\n" \
" sacf 512\n" \
- "0: mvc 0(8,2),0(4)\n" \
+ "0: mvc 0(8,%1),0(%2)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err), "=m" (x) \
- : "m" (*(const __u64*)(ptr)),"K" (-EFAULT) \
- : "cc", "2", "4" ); \
+ : "a" (__to),"a" (__from),"K" (-EFAULT),"0" (0) \
+ : "cc" ); \
})
#else /* __s390x__ */
#define __get_user_asm_8(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) const * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%2\n" \
" sacf 512\n" \
- "0: lg %1,0(4)\n" \
+ "0: lg %1,0(%2)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err), "=d" (x) \
- : "m" (*(const __u64*)(ptr)),"K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#endif /* __s390x__ */
@@ -259,48 +261,48 @@
#define __get_user_asm_4(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) const * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%2\n" \
" sacf 512\n" \
- "0: l %1,0(4)\n" \
+ "0: l %1,0(%2)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err), "=d" (x) \
- : "m" (*(const __u32*)(ptr)),"K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#define __get_user_asm_2(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) const * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%2\n" \
" sacf 512\n" \
- "0: lh %1,0(4)\n" \
+ "0: lh %1,0(%2)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err), "=d" (x) \
- : "m" (*(const __u16*)(ptr)),"K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#define __get_user_asm_1(x, ptr, err) \
({ \
+ register __typeof__(*(ptr)) const * __ptr asm("4"); \
+ __ptr = (ptr); \
__asm__ __volatile__ ( \
- " sr %0,%0\n" \
- " la 4,%2\n" \
" sr %1,%1\n" \
" sacf 512\n" \
- "0: ic %1,0(4)\n" \
+ "0: ic %1,0(%2)\n" \
" sacf 0\n" \
"1:\n" \
__uaccess_fixup \
: "=&d" (err), "=d" (x) \
- : "m" (*(const __u8*)(ptr)),"K" (-EFAULT) \
- : "cc", "4" ); \
+ : "a" (__ptr), "K" (-EFAULT), "0" (0) \
+ : "cc" ); \
})
#define __get_user(x, ptr) \
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