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[atomic] add stdc atomic detection. (#7536)

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This commit is contained in:
Bernard Xiong
2023-05-20 23:41:29 +08:00
committed by GitHub
parent 1e5dc5509e
commit 4b4c3c85f2
7 changed files with 68 additions and 38 deletions
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libcpu/risc-v/common/atomic_riscv.c
+16 -16
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@@ -12,7 +12,7 @@
rt_atomic_t rt_hw_atomic_exchange(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoswap.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -23,7 +23,7 @@ rt_atomic_t rt_hw_atomic_exchange(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_add(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoadd.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -34,7 +34,7 @@ rt_atomic_t rt_hw_atomic_add(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_sub(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
val = -val;
#if __riscv_xlen == 32
asm volatile ("amoadd.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
@@ -46,7 +46,7 @@ rt_atomic_t rt_hw_atomic_sub(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_xor(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoxor.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -57,7 +57,7 @@ rt_atomic_t rt_hw_atomic_xor(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_and(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoand.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -68,7 +68,7 @@ rt_atomic_t rt_hw_atomic_and(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_or(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoor.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -79,7 +79,7 @@ rt_atomic_t rt_hw_atomic_or(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_load(volatile rt_atomic_t *ptr)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoxor.w %0, x0, (%1)" : "=r"(result) : "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -90,7 +90,7 @@ rt_atomic_t rt_hw_atomic_load(volatile rt_atomic_t *ptr)
void rt_hw_atomic_store(volatile rt_atomic_t *ptr, rt_atomic_t val)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoswap.w %0, %1, (%2)" : "=r"(result) : "r"(val), "r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -100,7 +100,7 @@ void rt_hw_atomic_store(volatile rt_atomic_t *ptr, rt_atomic_t val)
rt_atomic_t rt_hw_atomic_flag_test_and_set(volatile rt_atomic_t *ptr)
{
rt_atomic_t result;
rt_atomic_t result = 0;
rt_atomic_t temp = 1;
#if __riscv_xlen == 32
asm volatile ("amoor.w %0, %1, (%2)" : "=r"(result) : "r"(temp), "r"(ptr) : "memory");
@@ -112,7 +112,7 @@ rt_atomic_t rt_hw_atomic_flag_test_and_set(volatile rt_atomic_t *ptr)
void rt_hw_atomic_flag_clear(volatile rt_atomic_t *ptr)
{
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile ("amoand.w %0, x0, (%1)" : "=r"(result) :"r"(ptr) : "memory");
#elif __riscv_xlen == 64
@@ -120,16 +120,16 @@ void rt_hw_atomic_flag_clear(volatile rt_atomic_t *ptr)
#endif
}
rt_atomic_t rt_hw_atomic_compare_exchange_strong(volatile rt_atomic_t *ptr, volatile rt_atomic_t *old, rt_atomic_t new)
rt_atomic_t rt_hw_atomic_compare_exchange_strong(volatile rt_atomic_t *ptr, rt_atomic_t *old, rt_atomic_t desired)
{
rt_atomic_t tmp = *old;
rt_atomic_t result;
rt_atomic_t result = 0;
#if __riscv_xlen == 32
asm volatile(
" fence iorw, ow\n"
"1: lr.w.aq %[result], (%[ptr])\n"
" bne %[result], %[tmp], 2f\n"
" sc.w.rl %[tmp], %[new], (%[ptr])\n"
" sc.w.rl %[tmp], %[desired], (%[ptr])\n"
" bnez %[tmp], 1b\n"
" li %[result], 1\n"
" j 3f\n"
@@ -137,14 +137,14 @@ rt_atomic_t rt_hw_atomic_compare_exchange_strong(volatile rt_atomic_t *ptr, vola
" li %[result], 0\n"
" 3:\n"
: [result]"+r" (result), [tmp]"+r" (tmp), [ptr]"+r" (ptr)
: [new]"r" (new), [old]"r"(old)
: [desired]"r" (desired), [old]"r"(old)
: "memory");
#elif __riscv_xlen == 64
asm volatile(
" fence iorw, ow\n"
"1: lr.d.aq %[result], (%[ptr])\n"
" bne %[result], %[tmp], 2f\n"
" sc.d.rl %[tmp], %[new], (%[ptr])\n"
" sc.d.rl %[tmp], %[desired], (%[ptr])\n"
" bnez %[tmp], 1b\n"
" li %[result], 1\n"
" j 3f\n"
@@ -152,7 +152,7 @@ rt_atomic_t rt_hw_atomic_compare_exchange_strong(volatile rt_atomic_t *ptr, vola
" li %[result], 0\n"
" 3:\n"
: [result]"+r" (result), [tmp]"+r" (tmp), [ptr]"+r" (ptr)
: [new]"r" (new), [old]"r"(old)
: [desired]"r" (desired), [old]"r"(old)
: "memory");
#endif
return result;