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target/ppc: Introduce ppc_code_endian_dc() helper

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Introduce the ppc_code_endian_dc() helper which returns the
MemOp endianness for the CODE path.

Use it in need_byteswap(), removing one TARGET_BIG_ENDIAN.

Note, the target MemOp endianness can be evaluated as (see
commit 5c43a750b6 "accel/tcg: Implement translator_ld*_end"):

    MO_TE ^ (do_swap * MO_BSWAP)

For PPC we use the DisasContext::le_mode field to swap the
default (big-endian) order, so to get the PPC MemOp endianness
we can directly use:

    MO_BE ^ (ctx->le_mode * MO_BSWAP)

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-ID: <20260202210106.93257-7-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé
2025-12-03 18:38:11 +01:00
parent 043c4e1715
commit 858a54e44d
1 changed files with 12 additions and 5 deletions
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17
target/ppc/translate.c
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@@ -214,14 +214,21 @@ static inline bool is_ppe(const DisasContext *ctx)
return !!(ctx->flags & POWERPC_FLAG_PPE42);
}
/**
* ppc_code_endian_dc:
* @dc: the disassembly context
*
* Return the MemOp endianness of the CODE path.
*/
static inline MemOp ppc_code_endian_dc(const DisasContext *ctx)
{
return MO_BE ^ (ctx->le_mode * MO_BSWAP);
}
/* Return true iff byteswap is needed in a scalar memop */
static inline bool need_byteswap(const DisasContext *ctx)
{
#if TARGET_BIG_ENDIAN
return ctx->le_mode;
#else
return !ctx->le_mode;
#endif
return ppc_code_endian_dc(ctx) != MO_TE;
}
/* True when active word size < size of target_long. */