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Fixed x86-64 long double passing.

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long double arguments require 16-byte alignment on the stack, which
requires adjustment when the the stack offset is not an evven number of
8-byte words.
This commit is contained in:
James Lyon
2013-04-26 16:42:12 +01:00
parent 41d76e1fcb
commit 6ee366e765
4 changed files with 206 additions and 123 deletions
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19
tests/abitest.c
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@ -389,6 +389,24 @@ static int stdarg_struct_test(void) {
return run_callback(src, stdarg_struct_test_callback);
}
/* Test that x86-64 arranges the stack correctly for arguments with alignment >8 bytes */
typedef LONG_DOUBLE (*arg_align_test_callback_type) (LONG_DOUBLE,int,LONG_DOUBLE,int,LONG_DOUBLE);
static int arg_align_test_callback(void *ptr) {
arg_align_test_callback_type f = (arg_align_test_callback_type)ptr;
long double x = f(12, 0, 25, 0, 37);
return (x == 74) ? 0 : -1;
}
static int arg_align_test(void) {
const char *src =
"long double f(long double a, int b, long double c, int d, long double e) {\n"
" return a + c + e;\n"
"}\n";
return run_callback(src, arg_align_test_callback);
}
#define RUN_TEST(t) \
if (!testname || (strcmp(#t, testname) == 0)) { \
fputs(#t "... ", stdout); \
@ -432,5 +450,6 @@ int main(int argc, char **argv) {
RUN_TEST(many_struct_test_2);
RUN_TEST(stdarg_test);
RUN_TEST(stdarg_struct_test);
RUN_TEST(arg_align_test);
return retval;
}