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m68k.h (CONDITIONAL_REGISTER_USAGE): If we have no 68881, we have no 68881 registers at all.

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* config/m68k/m68k.h (CONDITIONAL_REGISTER_USAGE): If we have no
68881, we have no 68881 registers at all.
(HARD_REGNO_MODE_OK): It is always OK to put a MODE_FLOAT
value in a 68881 register if it is available.

From-SVN: r30861
This commit is contained in:
Geoff Keating 1999-12-10 19:15:32 +00:00 committed by Geoffrey Keating
parent ff8ee66b00
commit 15a17b7229
2 changed files with 30 additions and 15 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
1999-12-10 Geoff Keating <geoffk@cygnus.com>
* config/m68k/m68k.h (CONDITIONAL_REGISTER_USAGE): If we have no
68881, we have no 68881 registers at all.
(HARD_REGNO_MODE_OK): It is always OK to put a MODE_FLOAT
value in a 68881 register if it is available.
1999-12-10 Clinton Popetz <cpopetz@cygnus.com>
* config/arm/arm.md (*mulsidi3adddi, *umulsidi3adddi): New patterns

38
gcc/config/m68k/m68k.h
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@ -438,9 +438,7 @@ extern int target_flags;
/* Make sure everything's fine if we *don't* have a given processor.
This assumes that putting a register in fixed_regs will keep the
compiler's mitts completely off it. We don't bother to zero it out
of register classes. If neither TARGET_FPA or TARGET_68881 is set,
the compiler won't touch since no instructions that use these
registers will be valid. */
of register classes. */
#ifdef SUPPORT_SUN_FPA
@ -448,14 +446,14 @@ extern int target_flags;
{ \
int i; \
HARD_REG_SET x; \
if (!TARGET_FPA) \
if (! TARGET_FPA) \
{ \
COPY_HARD_REG_SET (x, reg_class_contents[(int)FPA_REGS]); \
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
if (TEST_HARD_REG_BIT (x, i)) \
fixed_regs[i] = call_used_regs[i] = 1; \
} \
if (TARGET_FPA) \
if (! TARGET_68881) \
{ \
COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
@ -469,6 +467,15 @@ extern int target_flags;
#else
#define CONDITIONAL_REGISTER_USAGE \
{ \
int i; \
HARD_REG_SET x; \
if (! TARGET_68881) \
{ \
COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
if (TEST_HARD_REG_BIT (x, i)) \
fixed_regs[i] = call_used_regs[i] = 1; \
} \
if (flag_pic) \
fixed_regs[PIC_OFFSET_TABLE_REGNUM] \
= call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;\
@ -492,14 +499,12 @@ extern int target_flags;
/* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
On the 68000, the cpu registers can hold any mode but the 68881 registers
can hold only SFmode or DFmode. The 68881 registers can't hold anything
if 68881 use is disabled. */
can hold only SFmode or DFmode. */
#define HARD_REGNO_MODE_OK(REGNO, MODE) \
(((REGNO) < 16 \
&& !((REGNO) < 8 && (REGNO) + GET_MODE_SIZE (MODE) / 4 > 8)) \
|| ((REGNO) >= 16 && (REGNO) < 24 \
&& TARGET_68881 \
&& (GET_MODE_CLASS (MODE) == MODE_FLOAT \
|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
&& GET_MODE_UNIT_SIZE (MODE) <= 12))
@ -508,8 +513,7 @@ extern int target_flags;
/* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
On the 68000, the cpu registers can hold any mode but the 68881 registers
can hold only SFmode or DFmode. And the 68881 registers can't hold anything
if 68881 use is disabled. However, the Sun FPA register can
can hold only SFmode or DFmode. However, the Sun FPA register can
(apparently) hold whatever you feel like putting in them.
If using the fpa, don't put a double in d7/a0. */
@ -517,7 +521,12 @@ extern int target_flags;
be enabled regardless of whether TARGET_FPA is specified. It isn't clear
what the other d/a register checks are for. Every check using REGNO
actually needs to use a range, e.g. 24>=X<56 not <56. There is probably
no one using this code anymore. */
no one using this code anymore.
This code used to be used to suppress register usage for the 68881 by
saying that the 68881 registers couldn't hold values of any mode if there
was no 68881. This was wrong, because reload (etc.) will still try
to save and restore call-saved registers during, for instance, non-local
goto. */
#define HARD_REGNO_MODE_OK(REGNO, MODE) \
(((REGNO) < 16 \
&& !(TARGET_FPA \
@ -525,10 +534,9 @@ extern int target_flags;
&& GET_MODE_UNIT_SIZE ((MODE)) > 4 \
&& (REGNO) < 8 && (REGNO) + GET_MODE_SIZE ((MODE)) / 4 > 8 \
&& (REGNO) % (GET_MODE_UNIT_SIZE ((MODE)) / 4) != 0)) \
|| ((REGNO) < 24 \
? (TARGET_68881 \
&& (GET_MODE_CLASS (MODE) == MODE_FLOAT \
|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
|| ((REGNO) >= 16 && (REGNO) < 24 \
? ((GET_MODE_CLASS (MODE) == MODE_FLOAT \
|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
&& GET_MODE_UNIT_SIZE (MODE) <= 12) \
: ((REGNO) < 56 ? TARGET_FPA && GET_MODE_UNIT_SIZE (MODE) <= 8 : 0)))