diff options
| -rw-r--r-- | doc/abi.txt | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/abi.txt b/doc/abi.txt index 91b729e..80a3916 100644 --- a/doc/abi.txt +++ b/doc/abi.txt @@ -114,8 +114,10 @@ Legend: * A struct can be returned in registers in one of three ways. Either `%rax`, `%rdx` are used, or `%xmm0`, - `%xmm1`, or finally `%rax`, `%xmm0`. This should be - clear from the <@Returning> section above. + `%xmm1`, or finally `%rax`, `%xmm0`. The last case + happens when a struct is returned with one half + classified as INTEGER and the other as SSE. This + is a consequence of the <@Returning> section above. * The size of the arguments area of the stack needs to be computed first, then arguments are packed starting |