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tcg/tcg-op: Document wswap_i64() byte pattern 

Document wswap_i64(), added in commit 46be8425ff
("tcg: Implement tcg_gen_{h,w}swap_{i32,i64}").

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230823145542.79633-8-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2023-08-23 16:55:41 +02:00 committed by Richard Henderson
parent b8976aa5fe
commit ad262fb56b
1 changed files with 5 additions and 0 deletions
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5
tcg/tcg-op.c
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@ -1950,6 +1950,11 @@ void tcg_gen_hswap_i64(TCGv_i64 ret, TCGv_i64 arg)
tcg_temp_free_i64(t1); tcg_temp_free_i64(t1);
} }
/*
* wswap_i64: Swap 32-bit words within a 64-bit value.
*
* Byte pattern: abcdefgh -> efghabcd
*/
void tcg_gen_wswap_i64(TCGv_i64 ret, TCGv_i64 arg) void tcg_gen_wswap_i64(TCGv_i64 ret, TCGv_i64 arg)
{ {
/* Swapping 2 32-bit elements is a rotate. */ /* Swapping 2 32-bit elements is a rotate. */