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Unconditionally compile the __sync_* atomics support functions into compiler-rt

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for ARM.
This is quite ugly, because it has to work around a clang bug that does not
allow built-in functions to be defined, even when they're ones that are
expected to be built as part of a library.

Reviewed by:	ed
This commit is contained in:
David Chisnall 2013-08-31 08:50:45 +00:00
parent c2b340cb73
commit e1c0c6422a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=255092
2 changed files with 64 additions and 12 deletions
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3
lib/libcompiler_rt/Makefile
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@ -153,10 +153,11 @@ SRCF+= divsi3 \
.endif
# FreeBSD-specific atomic intrinsics.
.if ${MACHINE_CPUARCH} == "arm"
.if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "armv6"
.PATH: ${.CURDIR}/../../sys/arm/arm
SRCF+= stdatomic
CFLAGS+= -DEMIT_SYNC_ATOMICS
.elif ${MACHINE_CPUARCH} == "mips"
.PATH: ${.CURDIR}/../../sys/mips/mips

73
sys/arm/arm/stdatomic.c
View File

@ -194,6 +194,7 @@ EMIT_ALL_OPS_N(1, uint8_t)
EMIT_ALL_OPS_N(2, uint16_t)
EMIT_ALL_OPS_N(4, uint32_t)
EMIT_ALL_OPS_N(8, uint64_t)
#undef EMIT_ALL_OPS_N
#else /* !_KERNEL */
@ -330,6 +331,7 @@ EMIT_FETCH_OP_N(N, uintN_t, ldr, str, fetch_xor, "eor")
EMIT_ALL_OPS_N(1, uint8_t, "ldrb", "strb", "strbeq")
EMIT_ALL_OPS_N(2, uint16_t, "ldrh", "strh", "strheq")
EMIT_ALL_OPS_N(4, uint32_t, "ldr", "str", "streq")
#undef EMIT_ALL_OPS_N
#endif /* _KERNEL */
@ -337,7 +339,31 @@ EMIT_ALL_OPS_N(4, uint32_t, "ldr", "str", "streq")
#endif /* __CLANG_ATOMICS || __GNUC_ATOMICS */
#if defined(__SYNC_ATOMICS)
#if defined(__SYNC_ATOMICS) || defined(EMIT_SYNC_ATOMICS)
#ifdef __clang__
#pragma redefine_extname __sync_lock_test_and_set_1_c __sync_lock_test_and_set_1
#pragma redefine_extname __sync_lock_test_and_set_2_c __sync_lock_test_and_set_2
#pragma redefine_extname __sync_lock_test_and_set_4_c __sync_lock_test_and_set_4
#pragma redefine_extname __sync_val_compare_and_swap_1_c __sync_val_compare_and_swap_1
#pragma redefine_extname __sync_val_compare_and_swap_2_c __sync_val_compare_and_swap_2
#pragma redefine_extname __sync_val_compare_and_swap_4_c __sync_val_compare_and_swap_4
#pragma redefine_extname __sync_fetch_and_add_1_c __sync_fetch_and_add_1
#pragma redefine_extname __sync_fetch_and_add_2_c __sync_fetch_and_add_2
#pragma redefine_extname __sync_fetch_and_add_4_c __sync_fetch_and_add_4
#pragma redefine_extname __sync_fetch_and_and_1_c __sync_fetch_and_and_1
#pragma redefine_extname __sync_fetch_and_and_2_c __sync_fetch_and_and_2
#pragma redefine_extname __sync_fetch_and_and_4_c __sync_fetch_and_and_4
#pragma redefine_extname __sync_fetch_and_or_1_c __sync_fetch_and_or_1
#pragma redefine_extname __sync_fetch_and_or_2_c __sync_fetch_and_or_2
#pragma redefine_extname __sync_fetch_and_or_4_c __sync_fetch_and_or_4
#pragma redefine_extname __sync_fetch_and_xor_1_c __sync_fetch_and_xor_1
#pragma redefine_extname __sync_fetch_and_xor_2_c __sync_fetch_and_xor_2
#pragma redefine_extname __sync_fetch_and_xor_4_c __sync_fetch_and_xor_4
#pragma redefine_extname __sync_fetch_and_sub_1_c __sync_fetch_and_sub_1
#pragma redefine_extname __sync_fetch_and_sub_2_c __sync_fetch_and_sub_2
#pragma redefine_extname __sync_fetch_and_sub_4_c __sync_fetch_and_sub_4
#endif
/*
* Old __sync_* API.
@ -430,7 +456,7 @@ get_2(const reg_t *r, const uint16_t *offset_ptr)
#define EMIT_LOCK_TEST_AND_SET_N(N, uintN_t) \
uintN_t \
__sync_lock_test_and_set_##N(uintN_t *mem, uintN_t val) \
__sync_lock_test_and_set_##N##_c(uintN_t *mem, uintN_t val) \
{ \
uint32_t *mem32; \
reg_t val32, negmask, old; \
@ -462,7 +488,7 @@ EMIT_LOCK_TEST_AND_SET_N(2, uint16_t)
#define EMIT_VAL_COMPARE_AND_SWAP_N(N, uintN_t) \
uintN_t \
__sync_val_compare_and_swap_##N(uintN_t *mem, uintN_t expected, \
__sync_val_compare_and_swap_##N##_c(uintN_t *mem, uintN_t expected, \
uintN_t desired) \
{ \
uint32_t *mem32; \
@ -503,7 +529,7 @@ EMIT_VAL_COMPARE_AND_SWAP_N(2, uint16_t)
#define EMIT_ARITHMETIC_FETCH_AND_OP_N(N, uintN_t, name, op) \
uintN_t \
__sync_##name##_##N(uintN_t *mem, uintN_t val) \
__sync_##name##_##N##_c(uintN_t *mem, uintN_t val) \
{ \
uint32_t *mem32; \
reg_t val32, posmask, old; \
@ -541,7 +567,7 @@ EMIT_ARITHMETIC_FETCH_AND_OP_N(2, uint16_t, fetch_and_sub, "sub")
#define EMIT_BITWISE_FETCH_AND_OP_N(N, uintN_t, name, op, idempotence) \
uintN_t \
__sync_##name##_##N(uintN_t *mem, uintN_t val) \
__sync_##name##_##N##_c(uintN_t *mem, uintN_t val) \
{ \
uint32_t *mem32; \
reg_t val32, old; \
@ -577,7 +603,7 @@ EMIT_BITWISE_FETCH_AND_OP_N(2, uint16_t, fetch_and_xor, "eor", 0)
*/
uint32_t
__sync_lock_test_and_set_4(uint32_t *mem, uint32_t val)
__sync_lock_test_and_set_4_c(uint32_t *mem, uint32_t val)
{
uint32_t old, temp;
@ -594,7 +620,7 @@ __sync_lock_test_and_set_4(uint32_t *mem, uint32_t val)
}
uint32_t
__sync_val_compare_and_swap_4(uint32_t *mem, uint32_t expected,
__sync_val_compare_and_swap_4_c(uint32_t *mem, uint32_t expected,
uint32_t desired)
{
uint32_t old, temp;
@ -616,7 +642,7 @@ __sync_val_compare_and_swap_4(uint32_t *mem, uint32_t expected,
#define EMIT_FETCH_AND_OP_4(name, op) \
uint32_t \
__sync_##name##_4(uint32_t *mem, uint32_t val) \
__sync_##name##_4##_c(uint32_t *mem, uint32_t val) \
{ \
uint32_t old, temp1, temp2; \
\
@ -694,6 +720,7 @@ EMIT_ALL_OPS_N(1, uint8_t)
EMIT_ALL_OPS_N(2, uint16_t)
EMIT_ALL_OPS_N(4, uint32_t)
EMIT_ALL_OPS_N(8, uint64_t)
#undef EMIT_ALL_OPS_N
#else /* !_KERNEL */
@ -705,7 +732,7 @@ EMIT_ALL_OPS_N(8, uint64_t)
#define EMIT_LOCK_TEST_AND_SET_N(N, uintN_t, ldr, str) \
uintN_t \
__sync_lock_test_and_set_##N(uintN_t *mem, uintN_t val) \
__sync_lock_test_and_set_##N##_c(uintN_t *mem, uintN_t val) \
{ \
uint32_t old, temp, ras_start; \
\
@ -734,7 +761,7 @@ __sync_lock_test_and_set_##N(uintN_t *mem, uintN_t val) \
#define EMIT_VAL_COMPARE_AND_SWAP_N(N, uintN_t, ldr, streq) \
uintN_t \
__sync_val_compare_and_swap_##N(uintN_t *mem, uintN_t expected, \
__sync_val_compare_and_swap_##N##_c(uintN_t *mem, uintN_t expected, \
uintN_t desired) \
{ \
uint32_t old, temp, ras_start; \
@ -766,7 +793,7 @@ __sync_val_compare_and_swap_##N(uintN_t *mem, uintN_t expected, \
#define EMIT_FETCH_AND_OP_N(N, uintN_t, ldr, str, name, op) \
uintN_t \
__sync_##name##_##N(uintN_t *mem, uintN_t val) \
__sync_##name##_##N##_c(uintN_t *mem, uintN_t val) \
{ \
uint32_t old, temp, ras_start; \
\
@ -807,6 +834,30 @@ EMIT_ALL_OPS_N(1, uint8_t, "ldrb", "strb", "streqb")
EMIT_ALL_OPS_N(2, uint16_t, "ldrh", "strh", "streqh")
EMIT_ALL_OPS_N(4, uint32_t, "ldr", "str", "streq")
#ifndef __clang__
__strong_reference(__sync_lock_test_and_set_1_c, __sync_lock_test_and_set_1);
__strong_reference(__sync_lock_test_and_set_2_c, __sync_lock_test_and_set_2);
__strong_reference(__sync_lock_test_and_set_4_c, __sync_lock_test_and_set_4);
__strong_reference(__sync_val_compare_and_swap_1_c, __sync_val_compare_and_swap_1);
__strong_reference(__sync_val_compare_and_swap_2_c, __sync_val_compare_and_swap_2);
__strong_reference(__sync_val_compare_and_swap_4_c, __sync_val_compare_and_swap_4);
__strong_reference(__sync_fetch_and_add_1_c, __sync_fetch_and_add_1);
__strong_reference(__sync_fetch_and_add_2_c, __sync_fetch_and_add_2);
__strong_reference(__sync_fetch_and_add_4_c, __sync_fetch_and_add_4);
__strong_reference(__sync_fetch_and_and_1_c, __sync_fetch_and_and_1);
__strong_reference(__sync_fetch_and_and_2_c, __sync_fetch_and_and_2);
__strong_reference(__sync_fetch_and_and_4_c, __sync_fetch_and_and_4);
__strong_reference(__sync_fetch_and_sub_1_c, __sync_fetch_and_sub_1);
__strong_reference(__sync_fetch_and_sub_2_c, __sync_fetch_and_sub_2);
__strong_reference(__sync_fetch_and_sub_4_c, __sync_fetch_and_sub_4);
__strong_reference(__sync_fetch_and_or_1_c, __sync_fetch_and_or_1);
__strong_reference(__sync_fetch_and_or_2_c, __sync_fetch_and_or_2);
__strong_reference(__sync_fetch_and_or_4_c, __sync_fetch_and_or_4);
__strong_reference(__sync_fetch_and_xor_1_c, __sync_fetch_and_xor_1);
__strong_reference(__sync_fetch_and_xor_2_c, __sync_fetch_and_xor_2);
__strong_reference(__sync_fetch_and_xor_4_c, __sync_fetch_and_xor_4);
#endif
#endif /* _KERNEL */
#endif