[v3] Mirror map JIT memory for TCG

[PATCH v3 26/41] tcg/ppc: Use tcg_out_mem_long to reset TCG_REG_TB

Richard Henderson posted 41 patches 5 years, 1 month ago

Diff against v1 v1 v2 v4 v5
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Maintainers: Alistair Francis <Alistair.Francis@wdc.com>, Richard Henderson <rth@twiddle.net>, Michael Rolnik <mrolnik@gmail.com>, Laurent Vivier <laurent@vivier.eu>, Sagar Karandikar <sagark@eecs.berkeley.edu>, Palmer Dabbelt <palmer@dabbelt.com>, Huacai Chen <chenhc@lemote.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Peter Maydell <peter.maydell@linaro.org>, Eduardo Habkost <ehabkost@redhat.com>, Artyom Tarasenko <atar4qemu@gmail.com>, Sarah Harris <S.E.Harris@kent.ac.uk>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, Thomas Huth <thuth@redhat.com>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Aurelien Jarno <aurelien@aurel32.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Richard Henderson <richard.henderson@linaro.org>, Cornelia Huck <cohuck@redhat.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Andrzej Zaborowski <balrogg@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, Stefan Weil <sw@weilnetz.de>

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[PATCH v3 26/41] tcg/ppc: Use tcg_out_mem_long to reset TCG_REG_TB

Posted by Richard Henderson 5 years, 1 month ago

The maximum TB code gen size is UINT16_MAX, which the current
code does not support.  Use our utility function to optimally
add an arbitrary constant.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/ppc/tcg-target.c.inc | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index dc90705d02..91d5d95ddf 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -2392,9 +2392,8 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
         set_jmp_reset_offset(s, args[0]);
         if (USE_REG_TB) {
             /* For the unlinked case, need to reset TCG_REG_TB.  */
-            c = -tcg_current_code_size(s);
-            assert(c == (int16_t)c);
-            tcg_out32(s, ADDI | TAI(TCG_REG_TB, TCG_REG_TB, c));
+            tcg_out_mem_long(s, ADDI, ADD, TCG_REG_TB, TCG_REG_TB,
+                             -tcg_current_code_size(s));
         }
         break;
     case INDEX_op_goto_ptr:
-- 
2.25.1