From b5caa17cdaf153fca500cf8bb0fa3a14c02def6e Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Thu, 26 Oct 2023 20:46:13 -0700 Subject: target/hppa: Implement pa2.0 data prefetch instructions These are aliased onto the normal integer loads to %g0. Since we don't emulate caches, prefetch is a nop. Signed-off-by: Richard Henderson --- target/hppa/translate.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/target/hppa/translate.c b/target/hppa/translate.c index ba15cf6..e7f379d 100644 --- a/target/hppa/translate.c +++ b/target/hppa/translate.c @@ -2976,7 +2976,15 @@ static bool trans_permh(DisasContext *ctx, arg_permh *a) static bool trans_ld(DisasContext *ctx, arg_ldst *a) { - if (!ctx->is_pa20 && a->size > MO_32) { + if (ctx->is_pa20) { + /* + * With pa20, LDB, LDH, LDW, LDD to %g0 are prefetches. + * Any base modification still occurs. + */ + if (a->t == 0) { + return trans_nop_addrx(ctx, a); + } + } else if (a->size > MO_32) { return gen_illegal(ctx); } return do_load(ctx, a->t, a->b, a->x, a->scale ? a->size : 0, -- cgit v1.1