Agner's CPU blog

Hi! in this matrix multiplication code, there is a similar situation, when / if it enters the cycle with sse through vzeroupper, then the performance is significantly reduced. .globl mul mul: push %rbp push %rbx push %r12 push %r13 push %r14 push %r15 movq %rsp, %rbp movq %rdi, %r10 movq %rsi, %r11 ...