fsub              943 src/ia32/assembler-ia32.h   void fsub(int i);
fsub             3184 src/ia32/code-stubs-ia32.cc     __ fsub(1);    // rnd(X), X-rnd(X)
fsub             1268 src/x64/assembler-x64.h   void fsub(int i);
fsub             2236 src/x64/code-stubs-x64.cc     __ fsub(1);    // rnd(X), X-rnd(X)
fsub              359 test/cctest/test-disasm-ia32.cc   __ fsub(3);
fsub              340 test/cctest/test-disasm-x64.cc   __ fsub(3);