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tcg/aarch64: Apple does not align __int128_t in even registers

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From https://developer.apple.com/documentation/xcode/writing-arm64-code-for-apple-platforms

  When passing an argument with 16-byte alignment in integer registers,
  Apple platforms allow the argument to start in an odd-numbered xN
  register. The standard ABI requires it to begin in an even-numbered
  xN register.

Cc: qemu-stable@nongnu.org
Fixes: 5427a9a760 ("tcg: Add TCG_TARGET_CALL_{RET,ARG}_I128")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2169
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <9fc0c2c7-dd57-459e-aecb-528edb74b4a7@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Richard Henderson 2024-02-16 15:40:11 -06:00
parent 41689bb30c
commit 7f89fdf8eb
1 changed files with 5 additions and 1 deletions
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6
tcg/aarch64/tcg-target.h
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@ -55,7 +55,11 @@ typedef enum {
#define TCG_TARGET_CALL_STACK_OFFSET 0
#define TCG_TARGET_CALL_ARG_I32 TCG_CALL_ARG_NORMAL
#define TCG_TARGET_CALL_ARG_I64 TCG_CALL_ARG_NORMAL
#define TCG_TARGET_CALL_ARG_I128 TCG_CALL_ARG_EVEN
#ifdef CONFIG_DARWIN
# define TCG_TARGET_CALL_ARG_I128 TCG_CALL_ARG_NORMAL
#else
# define TCG_TARGET_CALL_ARG_I128 TCG_CALL_ARG_EVEN
#endif
#define TCG_TARGET_CALL_RET_I128 TCG_CALL_RET_NORMAL
#define have_lse (cpuinfo & CPUINFO_LSE)