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tcg/i386: Conditionalize tcg_out_extu_i32_i64

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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>
This commit is contained in:
Richard Henderson 2023-04-05 19:00:43 -07:00
parent 7a9ccb869c
commit b2485530d8
1 changed files with 3 additions and 1 deletions
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4
tcg/i386/tcg-target.c.inc
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@ -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)