samsonium/libffi
1
0
Fork 0
mirror of https://github.com/partic2/libffi synced 2026-11-10 18:17:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix small struct passing on ppc

Browse Source
This commit is contained in:
Anthony Green
2013-02-08 16:12:19 -05:00
parent 63ba1fa79f
commit 70b11b47ee
4 changed files with 54 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/powerpc/sysv.S
+13 -8
View File
@@ -142,14 +142,19 @@ L(float_return_value):
#endif
L(small_struct_return_value):
/*
* The C code always allocates a properly-aligned 8-byte bounce
* buffer to make this assembly code very simple. Just write out
* r3 and r4 to the buffer to allow the C code to handle the rest.
*/
stw %r3, 0(%r30)
stw %r4, 4(%r30)
b L(done_return_value)
extrwi %r6,%r31,2,19 /* number of bytes padding = shift/8 */
mtcrf 0x02,%r31 /* copy flags to cr[24:27] (cr6) */
extrwi %r5,%r31,5,19 /* r5 <- number of bits of padding */
subfic %r6,%r6,4 /* r6 <- number of useful bytes in r3 */
bf- 25,L(done_return_value) /* struct in r3 ? if not, done. */
/* smst_one_register: */
slw %r3,%r3,%r5 /* Left-justify value in r3 */
mtxer %r6 /* move byte count to XER ... */
stswx %r3,0,%r30 /* ... and store that many bytes */
bf+ 26,L(done_return_value) /* struct in r3:r4 ? */
add %r6,%r6,%r30 /* adjust pointer */
stswi %r4,%r6,4 /* store last four bytes */
b L(done_return_value)
.LFE1:
END(ffi_call_SYSV)