マシン・インターフェース (MI) の Compare and Swap (CMPSWP) 命令を使って、 マルチスレッド・プログラムのデータにアクセスすることができます。 CMPSWP 命令は、最初の比較オペランド値と 2 番目の比較オペランド値を比較します。 それらが同等であれば、スワップ・オペランドが...
You can use the Machine Interface's (MI) Compare and Swap (CMPSWP) instruction to access data in a multithreaded program. The CMPSWP instruction compares the value of a first compare operand to the value of a second compare operand. If the two values are equal, the swap operand is stored...
In a data processing system having linked lists it is useful to be able to add and delete items from such lists while maintaining the integrity of the linked nature of such lists. A new compare and swap instruction provides for effectively simultaneously swapping 2 values which is useful for ...
In a data processing system having linked lists it is useful to be able to add and delete items from such lists while maintaining the integrity of the linked nature of such lists. A new compare and swap instruction provides for effectively simultaneously swapping 2 values which is useful for ...
We are testing the v5.2.1 kernel on a MPC8248 board. Everything works, except nginx hangs when it calls __sync_bool_compare_and_swap. We are using GCC 7.4.0 with musl 1.1.21. The same nginx binary works fine with a 4.19.26 kernel. I am n...
Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):Device.Graphics additional documentation Running the testBefore you run the test, complete the test setup as described in the ...
Using the OS atomic cmp/swp works (step over/into does not go into infinite loop): #include <libkern/OSAtomic.h> int main(int argc, char * argv[]) { int c = 0; while(1) { if(OSAtomicCompareAndSwap32(0, 1, &c)) { break; ...
Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):Device.Graphics additional documentation Running the testBefore you run the test, complete the test setup as described in the ...
Opcode/InstructionOp / En64/32 bit Mode SupportCPUID Feature FlagDescription 66 0F C2 /r ib CMPPD xmm1, xmm2/m128, imm8 A V/V SSE2 Compare packed double-precision floating-point values in xmm2/m128 and xmm1 using bits 2:0 of imm8 as a comparison predicate. VEX.128.66.0F.WIG ...
Opcode/InstructionOp / En64/32 bit Mode SupportCPUID Feature FlagDescription F3 0F C2 /r ib CMPSS xmm1, xmm2/m32, imm8 A V/V SSE Compare low single precision floating-point value in xmm2/m32 and xmm1 using bits 2:0 of imm8 as comparison predicate. VEX.LIG.F3.0F.WIG C2 /r ...