+2003-07-23 Bob Wilson <bob.wilson@acm.org>
+
+ * config/xtensa/crti.asm (_init, _fini): Increase frame size to 64.
+ * config/xtensa/lib1funcs.asm (__mulsi3, __udivsi3, __divsi3,
+ __umodsi3, __modsi3): Increase frame size to 32.
+
2003-07-23 Geoffrey Keating <geoffk@apple.com>
* config/rs6000/host-darwin.c: ANSIfy, update comment for sigaltstack
#include "xtensa-config.h"
- # Define macros for the ABS and ADDX* instructions to handle cases
- # where they are not included in the Xtensa processor configuration.
+# Note: These functions use a minimum stack frame size of 32. This is
+# necessary for Xtensa configurations that only support a fixed register
+# window size of 8, where even leaf functions (such as these) need to
+# allocate space for a 4-word "extra save area".
+
+# Define macros for the ABS and ADDX* instructions to handle cases
+# where they are not included in the Xtensa processor configuration.
.macro do_abs dst, src, tmp
#if XCHAL_HAVE_ABS
.global __mulsi3
.type __mulsi3,@function
__mulsi3:
- entry sp, 16
+ entry sp, 32
#if XCHAL_HAVE_MUL16
or a4, a2, a3
#endif /* L_mulsi3 */
- # Define a macro for the NSAU (unsigned normalize shift amount)
- # instruction, which computes the number of leading zero bits,
- # to handle cases where it is not included in the Xtensa processor
- # configuration.
-
+# Define a macro for the NSAU (unsigned normalize shift amount)
+# instruction, which computes the number of leading zero bits,
+# to handle cases where it is not included in the Xtensa processor
+# configuration.
+
.macro do_nsau cnt, val, tmp, a
#if XCHAL_HAVE_NSA
nsau \cnt, \val
.global __udivsi3
.type __udivsi3,@function
__udivsi3:
- entry sp, 16
+ entry sp, 32
bltui a3, 2, .Lle_one # check if the divisor <= 1
mov a6, a2 # keep dividend in a6
.global __divsi3
.type __divsi3,@function
__divsi3:
- entry sp, 16
+ entry sp, 32
xor a7, a2, a3 # sign = dividend ^ divisor
do_abs a6, a2, a4 # udividend = abs(dividend)
do_abs a3, a3, a4 # udivisor = abs(divisor)
.global __umodsi3
.type __umodsi3,@function
__umodsi3:
- entry sp, 16
+ entry sp, 32
bltui a3, 2, .Lle_one # check if the divisor is <= 1
do_nsau a5, a2, a6, a7 # dividend_shift = nsau(dividend)
.global __modsi3
.type __modsi3,@function
__modsi3:
- entry sp, 16
+ entry sp, 32
mov a7, a2 # save original (signed) dividend
do_abs a2, a2, a4 # udividend = abs(dividend)
do_abs a3, a3, a4 # udivisor = abs(divisor)