Modified and pushed to r15-1765.
在 2024/7/2 上午11:50, Xi Ruoyao 写道:
On Tue, 2024-07-02 at 11:22 +0800, Lulu Cheng wrote:
+static int
+loongarch_insn_cost (rtx_insn *insn, bool speed)
+{
+ rtx x = PATTERN (insn);
+ int cost = pattern_cost (x, speed);
+
+ /* On LA464, prevent movcf2fr and movfr2gr from merging into movcf2gr. */
+ if (TARGET_uARCH_LA464 && GET_CODE (x) == SET
+ && GET_MODE (XEXP (x, 0)) == FCCmode)
+ {
+ rtx dest, src;
+ dest = XEXP (x, 0);
+ src = XEXP (x, 1);
+
+ if (REG_P (dest) && REG_P (src))
+ {
+ if (GP_REG_P (REGNO (dest)) && FCC_REG_P (REGNO (src)))
+ cost = COSTS_N_INSNS (7);
cost = loongarch_cost->movcf2gr;
+ else if (FCC_REG_P (REGNO (dest)) && GP_REG_P (REGNO (src)))
+ cost = COSTS_N_INSNS (15);
cost = loongarch_cost->movgr2cf;
Then we don't need to check TARGET_uARCH_LA464.
+ }
+ }
+ return cost;
+}
