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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-04-05 19:00:43 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-05-16 20:13:51 -0700 |
| commit | b2485530d8873f8c3a4f32bf718a52527e7d2981 (patch) | |
| tree | e91ccd8571693356a0c899e9b9efc22d8b1b1b39 | |
| parent | 7a9ccb869c31430ac8a852ae45ea95023b2d0d34 (diff) | |
| download | qemu-b2485530d8873f8c3a4f32bf718a52527e7d2981.tar.gz | |
tcg/i386: Conditionalize tcg_out_extu_i32_i64
Since TCG_TYPE_I32 values are kept zero-extended in registers, via
omission of the REXW bit, we need not extend if the register matches.
This is already relied upon by qemu_{ld,st}.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | tcg/i386/tcg-target.c.inc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index d8fd38d9e7..5d7fe5b300 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -1315,7 +1315,9 @@ static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg dest, TCGReg src) static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg dest, TCGReg src) { - tcg_out_ext32u(s, dest, src); + if (dest != src) { + tcg_out_ext32u(s, dest, src); + } } static void tcg_out_extrl_i64_i32(TCGContext *s, TCGReg dest, TCGReg src) |