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target/i386: fix x86_64 pushw op

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For x86_64 a 16 bit push op (pushw) of a memory address would generate
a 64 bit store on the stack instead of a 16 bit store.

For example:
        pushw (%rax)

behaves like
        pushq (%rax)

which is incorrect.

This patch fixes that.

Signed-off-by: Thomas Ogrisegg <tom-bugs-qemu@fnord.at>
Link: https://lore.kernel.org/r/20250715210307.GA1115@x1.fnord.at
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Thomas Ogrisegg 2025-07-15 23:03:07 +02:00 • committed by Paolo Bonzini
parent cdba90ac1b
commit 5a2faa0a0a
1 changed files with 1 additions and 1 deletions
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2
target/i386/tcg/decode-new.c.inc
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@ -1541,7 +1541,7 @@ static void decode_group4_5(DisasContext *s, CPUX86State *env, X86OpEntry *entry
[0x0b] = X86_OP_ENTRYr(CALLF_m, M,p),
[0x0c] = X86_OP_ENTRYr(JMP_m, E,f64, zextT0),
[0x0d] = X86_OP_ENTRYr(JMPF_m, M,p),
[0x0e] = X86_OP_ENTRYr(PUSH, E,f64),
[0x0e] = X86_OP_ENTRYr(PUSH, E,d64),
};
int w = (*b & 1);