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[Stable-9.0.4,14/57] tcg/ppc: Use TCG_REG_TMP2 for scratch index in prepare_host_addr

Message ID 20241109120801.3295120-14-mjt@tls.msk.ru (mailing list archive)
State New
Headers show
Series Patch Round-up for stable 9.0.4, freeze on 2024-11-18 | expand

Commit Message

Michael Tokarev Nov. 9, 2024, 12:07 p.m. UTC 
From: Richard Henderson <richard.henderson@linaro.org>

In tcg_out_qemu_ldst_i128, we need a non-zero index register,
which we then use as a base register in several address modes.
Since we always have TCG_REG_TMP2 available, use that.

Cc: qemu-stable@nongnu.org
Fixes: 526cd4ec01f ("tcg/ppc: Support 128-bit load/store")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2597
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-By: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit 3213da7b9539581c6df95f8ced5b09d0b02d425f)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff mbox series

Patch

diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 69abd30bbb..deb80521b3 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -2617,8 +2617,8 @@  static TCGLabelQemuLdst *prepare_host_addr(TCGContext *s, HostAddress *h,
 
     if (TCG_TARGET_REG_BITS == 64 && addr_type == TCG_TYPE_I32) {
         /* Zero-extend the guest address for use in the host address. */
-        tcg_out_ext32u(s, TCG_REG_R0, addrlo);
-        h->index = TCG_REG_R0;
+        tcg_out_ext32u(s, TCG_REG_TMP2, addrlo);
+        h->index = TCG_REG_TMP2;
     } else {
         h->index = addrlo;
     }