systems-assistant[bot]
6755fa3a36
git-subtree-dir: projects/rocprofiler-systems git-subtree-mainline:ee9e74df21git-subtree-split:92e1d84c72
78 righe
2.2 KiB
ArmAsm
78 righe
2.2 KiB
ArmAsm
.file "RTthread-powerpc-asm.S"
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.machine "push"
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#if defined(arch_ppc_little_endian)
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.abiversion 2
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#endif
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#ifndef __clang__
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# if defined(arch_64bit)
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.machine "ppc64"
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# else
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.machine "ppc"
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# endif
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#endif
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.section ".text"
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.align 2
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# /* ------------------------------------------- */
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# /* int atomic_set(volatile int *int_ptr); */
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# /* */
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# /* The only possible values at the given */
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# /* memory location are 0 and 1. Attempt to */
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# /* atomically update the value from 0 to 1. */
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# /* Return 1 if such an atomic update occurred; */
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# /* return 0 otherwise. */
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# /* ------------------------------------------- */
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#if defined(arch_ppc_little_endian)
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.section ".toc", "aw"
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.section ".text"
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.align 2
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.p2align 4,,15
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.globl atomic_set
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.type atomic_set, @function
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atomic_set:
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#elif defined(arch_64bit)
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.globl atomic_set
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.section ".opd", "aw"
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.align 3
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atomic_set:
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.quad .atomic_set, .TOC.@tocbase, 0
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.size atomic_set, 24
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.previous
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.globl .atomic_set
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.type .atomic_set, @function
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.atomic_set:
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#else
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.globl atomic_set
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.type atomic_set, @function
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atomic_set:
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#endif
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addi 4,0,1 # r4 = 1
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# Attempt atomic memory swap
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lwarx 5,0,3 # r5 = *int_ptr (load reserve indexed)
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stwcx. 4,0,3 # *int_ptr = 1 (store conditional indexed)
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bne- atomic_set_return_0 # if atomic swap failed, return 0
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cmpw 5,4 # if original value was already 1,
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beq- atomic_set_return_0 # return 0 because no value update occurred
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addi 3,0,1 # function return value = r3 = 1
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blr # branch via link register (function return)
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atomic_set_return_0:
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addi 3,0,0 # function return value = r3 = 0
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blr # branch via link register (function return)
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#if defined(arch_ppc_little_endian)
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.size atomic_set, . - atomic_set
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#elif defined(arch_64bit)
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.size .atomic_set, . - .atomic_set
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#else
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.size atomic_set, . - atomic_set
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#endif
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.machine "pop"
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.section .note.GNU-stack,"",@progbits
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