diff options
Diffstat (limited to 'packages/gcc/4.8.5/0020-xtensa-reimplement-register-spilling.patch')
-rw-r--r-- | packages/gcc/4.8.5/0020-xtensa-reimplement-register-spilling.patch | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/packages/gcc/4.8.5/0020-xtensa-reimplement-register-spilling.patch b/packages/gcc/4.8.5/0020-xtensa-reimplement-register-spilling.patch deleted file mode 100644 index 776914d..0000000 --- a/packages/gcc/4.8.5/0020-xtensa-reimplement-register-spilling.patch +++ /dev/null @@ -1,71 +0,0 @@ -From 05154174b369505238b759cf80d595d8cfc8c731 Mon Sep 17 00:00:00 2001 -From: Max Filippov <jcmvbkbc@gmail.com> -Date: Mon, 10 Aug 2015 21:35:20 +0300 -Subject: [PATCH 1/3] xtensa: reimplement register spilling - -Spilling windowed registers in userspace is much easier, more portable, -less error-prone and equally effective as in kernel. Now that register -spilling syscall is considered obsolete in the xtensa linux kernel -replace it with CALL12 followed by series of ENTRY in libgcc. - -2015-08-18 Max Filippov <jcmvbkbc@gmail.com> -libgcc/ - * config/xtensa/lib2funcs.S (__xtensa_libgcc_window_spill): Use - CALL12 followed by series of ENTRY to spill windowed registers. - (__xtensa_nonlocal_goto): Call __xtensa_libgcc_window_spill - instead of making linux spill syscall. - -Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> ---- -Backported from: r226962 - - libgcc/config/xtensa/lib2funcs.S | 30 +++++++++++++++++++++++------- - 1 file changed, 23 insertions(+), 7 deletions(-) - ---- a/libgcc/config/xtensa/lib2funcs.S -+++ b/libgcc/config/xtensa/lib2funcs.S -@@ -33,10 +33,29 @@ - .global __xtensa_libgcc_window_spill - .type __xtensa_libgcc_window_spill,@function - __xtensa_libgcc_window_spill: -- entry sp, 32 -- movi a2, 0 -- syscall -+ entry sp, 48 -+#if XCHAL_NUM_AREGS > 16 -+ call12 1f -+ retw -+ .align 4 -+1: -+ .rept (XCHAL_NUM_AREGS - 24) / 12 -+ _entry sp, 48 -+ mov a12, a0 -+ .endr -+ _entry sp, 16 -+#if XCHAL_NUM_AREGS % 12 == 0 -+ mov a4, a4 -+#elif XCHAL_NUM_AREGS % 12 == 4 -+ mov a8, a8 -+#elif XCHAL_NUM_AREGS % 12 == 8 -+ mov a12, a12 -+#endif -+ retw -+#else -+ mov a8, a8 - retw -+#endif - .size __xtensa_libgcc_window_spill, .-__xtensa_libgcc_window_spill - - -@@ -58,10 +77,7 @@ - entry sp, 32 - - /* Flush registers. */ -- mov a5, a2 -- movi a2, 0 -- syscall -- mov a2, a5 -+ call8 __xtensa_libgcc_window_spill - - /* Because the save area for a0-a3 is stored one frame below - the one identified by a2, the only way to restore those |