Re: [PATCH] xtensa: Optimize boolean evaluation or branching when EQ/NE to zero in S[IF]mode

Hi Suwa-san, On Sat, Jun 3, 2023 at 2:55 AM Takayuki 'January June' Suwa wrote: > > This patch optimizes the boolean evaluation of EQ/NE against zero > by adding two insn_and_split patterns similar to SImode conditional > store: > > "eq_zero": > op0 = (op1 == 0) ? 1 : 0; > op0 =

[PATCH] xtensa: Optimize boolean evaluation or branching when EQ/NE to zero in S[IF]mode

This patch optimizes the boolean evaluation of EQ/NE against zero by adding two insn_and_split patterns similar to SImode conditional store: "eq_zero": op0 = (op1 == 0) ? 1 : 0; op0 = clz(op1) >> 5; /* optimized (requires TARGET_NSA) */ "movsicc_ne0_reg_0": op0 = (op1 !=