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| author | Bob Wilson <bob.wilson@acm.org> | 2002-04-19 00:31:17 +0000 |
|---|---|---|
| committer | Bob Wilson <bwilson@gcc.gnu.org> | 2002-04-19 00:31:17 +0000 |
| commit | 57174693e009628a889fd760bacc263d2d5c054f (patch) | |
| tree | 96516e8fa201023f0d7a897434ad8cf1b35ddc19 /gcc | |
| parent | 46468cd96fb7916bec2ac3f1189e1805c543bece (diff) | |
| download | gcc-57174693e009628a889fd760bacc263d2d5c054f.zip gcc-57174693e009628a889fd760bacc263d2d5c054f.tar.gz gcc-57174693e009628a889fd760bacc263d2d5c054f.tar.bz2 | |
lib2funcs.S (__xtensa_libgcc_window_spill, [...]): Use a syscall instructions to flush the register windows.
* config/xtensa/lib2funcs.S (__xtensa_libgcc_window_spill,
__xtensa_nonlocal_goto): Use a syscall instructions to flush
the register windows.
From-SVN: r52503
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/xtensa/lib2funcs.S | 54 |
2 files changed, 21 insertions, 39 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 33c7b5b..2e7f60a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2002-04-18 Bob Wilson <bob.wilson@acm.org> + + * config/xtensa/lib2funcs.S (__xtensa_libgcc_window_spill, + __xtensa_nonlocal_goto): Use a syscall instructions to flush + the register windows. + 2002-04-18 Zack Weinberg <zack@codesourcery.com> * real.h: Define REAL_VALUE_TYPE_SIZE as 96 or 160, as diff --git a/gcc/config/xtensa/lib2funcs.S b/gcc/config/xtensa/lib2funcs.S index f607e01..bdc26e8 100644 --- a/gcc/config/xtensa/lib2funcs.S +++ b/gcc/config/xtensa/lib2funcs.S @@ -30,46 +30,19 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "xtensa/xtensa-config.h" -/* __xtensa_libgcc_window_spill: This function uses a series of nested - calls to flush out all but the current register window. This is - used to set up the stack so that arbitrary frames can be accessed. - The functions used for the nested calls are also reused by the - nonlocal goto function below. */ - - .align 4 - .global __xtensa_libgcc_window_spill - .type __xtensa_libgcc_window_spill,@function -__xtensa_libgcc_window_spill: - entry sp, 48 - call4 .L__wdwspill_assist52 // called with call8, only need a call4 - retw - .size __xtensa_libgcc_window_spill,.-__xtensa_libgcc_window_spill +/* __xtensa_libgcc_window_spill: This function flushes out all but the + current register window. This is used to set up the stack so that + arbitrary frames can be accessed. */ - .align 4 -.L__wdwspill_assist56: - entry sp, 16 - call4 .L__wdwspill_assist52 - retw - .align 4 -.L__wdwspill_assist52: - entry sp, 48 - call12 .L__wdwspill_assist40 - retw - .align 4 -.L__wdwspill_assist40: - entry sp, 48 - call12 .L__wdwspill_assist28 - retw - .align 4 -.L__wdwspill_assist28: - entry sp, 48 - call12 .L__wdwspill_assist16 - retw - .align 4 -.L__wdwspill_assist16: - entry sp, 16 - movi a15, 0 + .align 4 + .global __xtensa_libgcc_window_spill + .type __xtensa_libgcc_window_spill,@function +__xtensa_libgcc_window_spill: + entry sp, 32 + movi a2, 0 + syscall retw + .size __xtensa_libgcc_window_spill,.-__xtensa_libgcc_window_spill /* __xtensa_nonlocal_goto: This code does all the hard work of a @@ -90,7 +63,10 @@ __xtensa_nonlocal_goto: entry sp, 32 /* flush registers */ - call8 .L__wdwspill_assist56 + mov a5, a2 + movi a2, 0 + syscall + mov a2, a5 /* Because the save area for a0-a3 is stored one frame below the one identified by a2, the only way to restore those |