From cc74d332ff9a78684374847375ef63fc4bd10436 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 5 Jun 2017 12:12:59 -0700 Subject: tcg/aarch64: Use ADR in tcg_out_movi The new placement of the TB means that we can use one insn to load the return value for exit_tb returning the TB pointer. Tested-by: Emilio G. Cota Signed-off-by: Richard Henderson --- tcg/aarch64/tcg-target.inc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'tcg') diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c index 5f185458f1..1fa3bccc89 100644 --- a/tcg/aarch64/tcg-target.inc.c +++ b/tcg/aarch64/tcg-target.inc.c @@ -616,7 +616,12 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, /* Look for host pointer values within 4G of the PC. This happens often when loading pointers to QEMU's own data structures. */ if (type == TCG_TYPE_I64) { - tcg_target_long disp = (value >> 12) - ((intptr_t)s->code_ptr >> 12); + tcg_target_long disp = value - (intptr_t)s->code_ptr; + if (disp == sextract64(disp, 0, 21)) { + tcg_out_insn(s, 3406, ADR, rd, disp); + return; + } + disp = (value >> 12) - ((intptr_t)s->code_ptr >> 12); if (disp == sextract64(disp, 0, 21)) { tcg_out_insn(s, 3406, ADRP, rd, disp); if (value & 0xfff) { -- cgit v1.2.3