tcg/loongarch64: Enable v256 with LASX

Reviewed-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

tcg/loongarch64/tcg-target.c.inc

@@ -2487,6 +2487,9 @@ static void tcg_target_init(TCGContext *s)
     if (cpuinfo & CPUINFO_LSX) {
         tcg_target_available_regs[TCG_TYPE_V64] = ALL_VECTOR_REGS;
         tcg_target_available_regs[TCG_TYPE_V128] = ALL_VECTOR_REGS;
+        if (cpuinfo & CPUINFO_LASX) {
+            tcg_target_available_regs[TCG_TYPE_V256] = ALL_VECTOR_REGS;
+        }
         tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_V24);
         tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_V25);
         tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_V26);

tcg/loongarch64/tcg-target.h

@@ -173,7 +173,7 @@ typedef enum {
 
 #define TCG_TARGET_HAS_v64              (cpuinfo & CPUINFO_LSX)
 #define TCG_TARGET_HAS_v128             (cpuinfo & CPUINFO_LSX)
-#define TCG_TARGET_HAS_v256             0
+#define TCG_TARGET_HAS_v256             (cpuinfo & CPUINFO_LASX)
 
 #define TCG_TARGET_HAS_not_vec          1
 #define TCG_TARGET_HAS_neg_vec          1