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fr30.h (TRAMPOLINE_TEMPLATE): Use nops to ensure the static chain and destination functions are 32bit aligned...

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* fr30.h (TRAMPOLINE_TEMPLATE): Use nops to ensure the static chain
        and destination functions are 32bit aligned within the trampoline.
        (TRAMPOLINE_SIZE, INITIALIZE_TRAMPOLINE): Corresponding changes.
        (TRAMPOLINE_ALIGNMENT): Define.

From-SVN: r31409
This commit is contained in:
Jeffrey A Law 2000-01-14 09:28:10 +00:00 committed by Jeff Law
parent b2eadaa201
commit 254a8f0dbe
2 changed files with 23 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,5 +1,10 @@
Fri Jan 14 00:28:06 2000 Jeffrey A Law (law@cygnus.com)
* fr30.h (TRAMPOLINE_TEMPLATE): Use nops to ensure the static chain
and destination functions are 32bit aligned within the trampoline.
(TRAMPOLINE_SIZE, INITIALIZE_TRAMPOLINE): Corresponding changes.
(TRAMPOLINE_ALIGNMENT): Define.
* cse.c (cse_insn): When changing (set (pc) (reg)) to
(set (pc) (label_ref)), verify the change creates a valid insn.

22
gcc/config/fr30/fr30.h
View File

@ -1139,22 +1139,36 @@ typedef int CUMULATIVE_ARGS;
/* On the FR30, the trampoline is:
nop
ldi:32 STATIC, r12
nop
ldi:32 FUNCTION, r0
jmp @r0 */
jmp @r0
The no-ops are to guarantee that the the static chain and final
target are 32 bit ailgned within the trampoline. That allows us to
initialize those locations with simple SImode stores. The alternative
would be to use HImode stores. */
/* A C statement to output, on the stream FILE, assembler code for a block of
data that contains the constant parts of a trampoline. This code should not
include a label--the label is taken care of automatically. */
#define TRAMPOLINE_TEMPLATE(FILE) \
{ \
fprintf (FILE, "\tnop\n"); \
fprintf (FILE, "\tldi:32\t#0, %s\n", reg_names [STATIC_CHAIN_REGNUM]); \
fprintf (FILE, "\tnop\n"); \
fprintf (FILE, "\tldi:32\t#0, %s\n", reg_names [COMPILER_SCRATCH_REGISTER]); \
fprintf (FILE, "\tjmp\t@%s\n", reg_names [COMPILER_SCRATCH_REGISTER]); \
}
/* A C expression for the size in bytes of the trampoline, as an integer. */
#define TRAMPOLINE_SIZE 14
#define TRAMPOLINE_SIZE 18
/* We want the trampoline to be aligned on a 32bit boundary so that we can
make sure the location of the static chain & target function within
the trampoline is also aligned on a 32bit boundary. */
#define TRAMPOLINE_ALIGNMENT 32
/* A C statement to initialize the variable parts of a trampoline. ADDR is an
RTX for the address of the trampoline; FNADDR is an RTX for the address of
@ -1163,8 +1177,8 @@ typedef int CUMULATIVE_ARGS;
#define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
do \
{ \
emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 2)), STATIC_CHAIN);\
emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 8)), FNADDR); \
emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 4)), STATIC_CHAIN);\
emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 12)), FNADDR); \
} while (0);
/*}}}*/