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Commit b7974b3a by Bob Wilson
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lib1funcs.asm: Rename abi_entry/abi_return macros to leaf_entry/leaf_return. 

	* config/xtensa/lib1funcs.asm: Rename abi_entry/abi_return macros
	to leaf_entry/leaf_return.  Change leaf_entry to add 16 bytes to
	the frame size.  Update to use the new macros.
	* config/xtensa/ieee754-sf.S: Use new leaf_entry/leaf_return macros.
	* config/xtensa/ieee754-df.S: Likewise.

From-SVN: r112604
parent 56e84019
Showing with 38 additions and 29 deletions
gcc/ChangeLog
2004-03-31 Richard Henderson <rth@redhat.com>
2006-03-31 Bob Wilson <bob.wilson@acm.org>
* config/xtensa/lib1funcs.asm: Rename abi_entry/abi_return macros
to leaf_entry/leaf_return. Change leaf_entry to add 16 bytes to
the frame size. Update to use the new macros.
* config/xtensa/ieee754-sf.S: Use new leaf_entry/leaf_return macros.
* config/xtensa/ieee754-df.S: Likewise.
2006-03-31 Richard Henderson <rth@redhat.com>
* tree-cfg.c (make_ctrl_stmt_edges, make_exit_edges): Merge into...
(make_edges): ... here. Control fallthru creation with a local
......
gcc/config/xtensa/lib1funcs.asm
......@@ -30,10 +30,11 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
#include "xtensa-config.h"
# 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".
# Force each stack frame to contain an "Extra Save Area" (ESA) of at least
# 16 bytes. This is necessary for non-standard Xtensa configurations that
# only support a fixed register window size of 8, where even leaf functions
# (such as these) need the ESA for interrupt handlers.
#define MIN_ESA 16
# Define macros for the ABS and ADDX* instructions to handle cases
# where they are not included in the Xtensa processor configuration.
......@@ -75,20 +76,20 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
#endif
.endm
# Define macros for function entry and return, supporting either the
# Define macros for leaf function entry and return, supporting either the
# standard register windowed ABI or the non-windowed call0 ABI. These
# macros do not allocate any extra stack space, so they only work for
# leaf functions that do not need to spill anything to the stack.
.macro abi_entry reg, size
.macro leaf_entry reg, size
#if XCHAL_HAVE_WINDOWED && !__XTENSA_CALL0_ABI__
entry \reg, \size
entry \reg, \size + MIN_ESA
#else
/* do nothing */
#endif
.endm
.macro abi_return
.macro leaf_return
#if XCHAL_HAVE_WINDOWED && !__XTENSA_CALL0_ABI__
retw
#else
......@@ -102,14 +103,14 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
.global __mulsi3
.type __mulsi3,@function
__mulsi3:
abi_entry sp, 32
leaf_entry sp, 16
#if XCHAL_HAVE_MUL16
or a4, a2, a3
srai a4, a4, 16
bnez a4, .LMUL16
mul16u a2, a2, a3
abi_return
leaf_return
.LMUL16:
srai a4, a2, 16
srai a5, a3, 16
......@@ -165,7 +166,7 @@ __mulsi3:
bgeui a3, 16, .Lmult_main_loop
neg a3, a2
movltz a2, a3, a5
abi_return
leaf_return
.align 4
.Lmult_main_loop:
......@@ -195,7 +196,7 @@ __mulsi3:
#endif /* !XCHAL_HAVE_MUL16 && !XCHAL_HAVE_MAC16 */
abi_return
leaf_return
.size __mulsi3,.-__mulsi3
#endif /* L_mulsi3 */
......@@ -264,7 +265,7 @@ __nsau_data:
.global __udivsi3
.type __udivsi3,@function
__udivsi3:
abi_entry sp, 32
leaf_entry sp, 16
bltui a3, 2, .Lle_one # check if the divisor <= 1
mov a6, a2 # keep dividend in a6
......@@ -297,24 +298,24 @@ __udivsi3:
bltu a6, a3, .Lreturn
addi a2, a2, 1 # increment quotient if dividend >= divisor
.Lreturn:
abi_return
leaf_return
.Lle_one:
beqz a3, .Lerror # if divisor == 1, return the dividend
abi_return
leaf_return
.Lspecial:
# return dividend >= divisor
bltu a6, a3, .Lreturn0
movi a2, 1
abi_return
leaf_return
.Lerror:
# just return 0; could throw an exception
.Lreturn0:
movi a2, 0
abi_return
leaf_return
.size __udivsi3,.-__udivsi3
#endif /* L_udivsi3 */
......@@ -325,7 +326,7 @@ __udivsi3:
.global __divsi3
.type __divsi3,@function
__divsi3:
abi_entry sp, 32
leaf_entry sp, 16
xor a7, a2, a3 # sign = dividend ^ divisor
do_abs a6, a2, a4 # udividend = abs(dividend)
do_abs a3, a3, a4 # udivisor = abs(divisor)
......@@ -361,27 +362,27 @@ __divsi3:
.Lreturn:
neg a5, a2
movltz a2, a5, a7 # return (sign < 0) ? -quotient : quotient
abi_return
leaf_return
.Lle_one:
beqz a3, .Lerror
neg a2, a6 # if udivisor == 1, then return...
movgez a2, a6, a7 # (sign < 0) ? -udividend : udividend
abi_return
leaf_return
.Lspecial:
bltu a6, a3, .Lreturn0 # if dividend < divisor, return 0
movi a2, 1
movi a4, -1
movltz a2, a4, a7 # else return (sign < 0) ? -1 : 1
abi_return
leaf_return
.Lerror:
# just return 0; could throw an exception
.Lreturn0:
movi a2, 0
abi_return
leaf_return
.size __divsi3,.-__divsi3
#endif /* L_divsi3 */
......@@ -392,7 +393,7 @@ __divsi3:
.global __umodsi3
.type __umodsi3,@function
__umodsi3:
abi_entry sp, 32
leaf_entry sp, 16
bltui a3, 2, .Lle_one # check if the divisor is <= 1
do_nsau a5, a2, a6, a7 # dividend_shift = nsau(dividend)
......@@ -422,13 +423,13 @@ __umodsi3:
bltu a2, a3, .Lreturn
sub a2, a2, a3 # subtract once more if dividend >= divisor
.Lreturn:
abi_return
leaf_return
.Lle_one:
# the divisor is either 0 or 1, so just return 0.
# someday we may want to throw an exception if the divisor is 0.
movi a2, 0
abi_return
leaf_return
.size __umodsi3,.-__umodsi3
#endif /* L_umodsi3 */
......@@ -439,7 +440,7 @@ __umodsi3:
.global __modsi3
.type __modsi3,@function
__modsi3:
abi_entry sp, 32
leaf_entry sp, 16
mov a7, a2 # save original (signed) dividend
do_abs a2, a2, a4 # udividend = abs(dividend)
do_abs a3, a3, a4 # udivisor = abs(divisor)
......@@ -474,13 +475,13 @@ __modsi3:
bgez a7, .Lpositive
neg a2, a2 # if (dividend < 0), return -udividend
.Lpositive:
abi_return
leaf_return
.Lle_one:
# udivisor is either 0 or 1, so just return 0.
# someday we may want to throw an exception if udivisor is 0.
movi a2, 0
abi_return
leaf_return
.size __modsi3,.-__modsi3
#endif /* L_modsi3 */
......
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