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[Qemu-devel] [PULL 04/10] tcg/aarch64: Use ADR in tcg_out_movi
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 04/10] tcg/aarch64: Use ADR in tcg_out_movi |
Date: |
Tue, 13 Jun 2017 22:23:05 -0700 |
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 <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/aarch64/tcg-target.inc.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c
index 5f18545..1fa3bcc 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) {
--
2.9.4
- [Qemu-devel] [PULL 00/10] TCG queued patches, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 03/10] translate-all: consolidate tb init in tb_gen_code, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 01/10] util: add cacheinfo, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 02/10] tcg: allocate TB structs before the corresponding translated code, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 04/10] tcg/aarch64: Use ADR in tcg_out_movi,
Richard Henderson <=
- [Qemu-devel] [PULL 05/10] tcg/arm: Use indirect branch for goto_tb, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 06/10] tcg/arm: Remove limit on code buffer size, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 07/10] tcg/arm: Try pc-relative addresses for movi, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 09/10] Revert "target/aarch64: optimize indirect branches", Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 08/10] tcg/arm: Use ldr (literal) for goto_tb, Richard Henderson, 2017/06/14
- [Qemu-devel] [PULL 10/10] tcg: Remove tb_htable_lookup from helper_lookup_tb_ptr, Richard Henderson, 2017/06/14
- Re: [Qemu-devel] [PULL 00/10] TCG queued patches, no-reply, 2017/06/14
- Re: [Qemu-devel] [PULL 00/10] TCG queued patches, no-reply, 2017/06/14
- Re: [Qemu-devel] [PULL 00/10] TCG queued patches, Richard Henderson, 2017/06/14