From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: jniethe5@gmail.com
Subject: [PATCH v4 13/13] tcg/ppc: Disable TCG_REG_TB for Power9/Power10
Date: Fri, 13 Oct 2023 10:10:12 -0700 [thread overview]
Message-ID: <20231013171012.122980-14-richard.henderson@linaro.org> (raw)
In-Reply-To: <20231013171012.122980-1-richard.henderson@linaro.org>
This appears to slightly improve performance on power9/10.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/ppc/tcg-target.c.inc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 6496f76e41..c31da4da9d 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -83,7 +83,7 @@
#define TCG_VEC_TMP2 TCG_REG_V1
#define TCG_REG_TB TCG_REG_R31
-#define USE_REG_TB (TCG_TARGET_REG_BITS == 64)
+#define USE_REG_TB (TCG_TARGET_REG_BITS == 64 && !have_isa_3_00)
/* Shorthand for size of a pointer. Avoid promotion to unsigned. */
#define SZP ((int)sizeof(void *))
--
2.34.1
prev parent reply other threads:[~2023-10-13 17:12 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-13 17:09 [PATCH v4 00/13] tcg/ppc: direct branching, power9, power10 Richard Henderson
2023-10-13 17:10 ` [PATCH v4 01/13] tcg/ppc: Untabify tcg-target.c.inc Richard Henderson
2023-10-13 17:10 ` [PATCH v4 02/13] tcg/ppc: Enable direct branching tcg_out_goto_tb with TCG_REG_TB Richard Henderson
2023-10-13 17:10 ` [PATCH v4 03/13] tcg/ppc: Reinterpret tb-relative to TB+4 Richard Henderson
2023-10-13 17:10 ` [PATCH v4 04/13] tcg/ppc: Use ADDPCIS in tcg_out_tb_start Richard Henderson
2023-10-13 17:10 ` [PATCH v4 05/13] tcg/ppc: Use ADDPCIS in tcg_out_movi_int Richard Henderson
2023-10-13 17:10 ` [PATCH v4 06/13] tcg/ppc: Use ADDPCIS for the constant pool Richard Henderson
2023-10-13 17:10 ` [PATCH v4 07/13] tcg/ppc: Use ADDPCIS in tcg_out_goto_tb Richard Henderson
2023-10-13 17:10 ` [PATCH v4 08/13] tcg/ppc: Use PADDI in tcg_out_movi Richard Henderson
2023-10-13 17:10 ` [PATCH v4 09/13] tcg/ppc: Use prefixed instructions in tcg_out_mem_long Richard Henderson
2023-10-13 17:10 ` [PATCH v4 10/13] tcg/ppc: Use PLD in tcg_out_movi for constant pool Richard Henderson
2023-10-13 17:10 ` [PATCH v4 11/13] tcg/ppc: Use prefixed instructions in tcg_out_dupi_vec Richard Henderson
2023-10-13 17:10 ` [PATCH v4 12/13] tcg/ppc: Use PLD in tcg_out_goto_tb Richard Henderson
2023-10-13 17:10 ` Richard Henderson [this message]
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