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yaml
---
r: 185016
b: refs/heads/master
c: 5917dae
h: refs/heads/master
v: v3
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Christoph Lameter authored and Tejun Heo committed Jan 5, 2010
1 parent 81eabd4 commit 55c2b95
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Showing 2 changed files with 73 additions and 15 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 79615760f380ec86cd58204744e774c33fab9211
refs/heads/master: 5917dae83cb02dfe74c9167b79e86e6d65183fa3
86 changes: 72 additions & 14 deletions trunk/arch/x86/include/asm/percpu.h
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Original file line number Diff line number Diff line change
Expand Up @@ -103,6 +103,64 @@ do { \
} \
} while (0)

/*
* Generate a percpu add to memory instruction and optimize code
* if a one is added or subtracted.
*/
#define percpu_add_op(var, val) \
do { \
typedef typeof(var) pao_T__; \
const int pao_ID__ = (__builtin_constant_p(val) && \
((val) == 1 || (val) == -1)) ? (val) : 0; \
if (0) { \
pao_T__ pao_tmp__; \
pao_tmp__ = (val); \
} \
switch (sizeof(var)) { \
case 1: \
if (pao_ID__ == 1) \
asm("incb "__percpu_arg(0) : "+m" (var)); \
else if (pao_ID__ == -1) \
asm("decb "__percpu_arg(0) : "+m" (var)); \
else \
asm("addb %1, "__percpu_arg(0) \
: "+m" (var) \
: "qi" ((pao_T__)(val))); \
break; \
case 2: \
if (pao_ID__ == 1) \
asm("incw "__percpu_arg(0) : "+m" (var)); \
else if (pao_ID__ == -1) \
asm("decw "__percpu_arg(0) : "+m" (var)); \
else \
asm("addw %1, "__percpu_arg(0) \
: "+m" (var) \
: "ri" ((pao_T__)(val))); \
break; \
case 4: \
if (pao_ID__ == 1) \
asm("incl "__percpu_arg(0) : "+m" (var)); \
else if (pao_ID__ == -1) \
asm("decl "__percpu_arg(0) : "+m" (var)); \
else \
asm("addl %1, "__percpu_arg(0) \
: "+m" (var) \
: "ri" ((pao_T__)(val))); \
break; \
case 8: \
if (pao_ID__ == 1) \
asm("incq "__percpu_arg(0) : "+m" (var)); \
else if (pao_ID__ == -1) \
asm("decq "__percpu_arg(0) : "+m" (var)); \
else \
asm("addq %1, "__percpu_arg(0) \
: "+m" (var) \
: "re" ((pao_T__)(val))); \
break; \
default: __bad_percpu_size(); \
} \
} while (0)

#define percpu_from_op(op, var, constraint) \
({ \
typeof(var) pfo_ret__; \
Expand Down Expand Up @@ -144,8 +202,8 @@ do { \
#define percpu_read(var) percpu_from_op("mov", var, "m" (var))
#define percpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
#define percpu_write(var, val) percpu_to_op("mov", var, val)
#define percpu_add(var, val) percpu_to_op("add", var, val)
#define percpu_sub(var, val) percpu_to_op("sub", var, val)
#define percpu_add(var, val) percpu_add_op(var, val)
#define percpu_sub(var, val) percpu_add_op(var, -(val))
#define percpu_and(var, val) percpu_to_op("and", var, val)
#define percpu_or(var, val) percpu_to_op("or", var, val)
#define percpu_xor(var, val) percpu_to_op("xor", var, val)
Expand All @@ -157,9 +215,9 @@ do { \
#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
#define __this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
#define __this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
#define __this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
Expand All @@ -176,9 +234,9 @@ do { \
#define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
#define this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
#define this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
#define this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
Expand All @@ -189,9 +247,9 @@ do { \
#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)

#define irqsafe_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
#define irqsafe_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
#define irqsafe_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
Expand All @@ -209,19 +267,19 @@ do { \
#ifdef CONFIG_X86_64
#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
#define __this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)

#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)

#define irqsafe_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
Expand Down

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