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| author | Geoff Keating <geoffk@cygnus.com> | 2000-09-04 01:42:27 +0000 |
|---|---|---|
| committer | Geoffrey Keating <geoffk@gcc.gnu.org> | 2000-09-04 01:42:27 +0000 |
| commit | 0d86f538d83bce5e15d4bf47551dbdb47b0c63a7 (patch) | |
| tree | a1c2ade41d7ec665fab1515f115da8eb1795ee52 /gcc | |
| parent | 3c809ba45bfc40851f7a2484c42394e370a31cbc (diff) | |
| download | gcc-0d86f538d83bce5e15d4bf47551dbdb47b0c63a7.zip gcc-0d86f538d83bce5e15d4bf47551dbdb47b0c63a7.tar.gz gcc-0d86f538d83bce5e15d4bf47551dbdb47b0c63a7.tar.bz2 | |
rs6000.h: Update various comments about XER_REGNO.
* config/rs6000/rs6000.h: Update various comments about XER_REGNO.
(REGNO_REG_CLASS): Use symbolic register
names.
From-SVN: r36123
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.h | 34 |
2 files changed, 19 insertions, 21 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 397a9e7..e2d2ad7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2000-09-03 Geoff Keating <geoffk@cygnus.com> + + * config/rs6000/rs6000.h: Update various comments about XER_REGNO. + (REGNO_REG_CLASS): Use symbolic register + names. + 2000-09-03 Richard Earnshaw <rearnsha@arm.com> * arm.c (final_prescan_insn): If the form of a jump insn isn't diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index 14ca63a..cb8795f 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -742,8 +742,7 @@ extern int rs6000_debug_arg; /* debug argument handling */ /* True if register is an integer register. */ #define INT_REGNO_P(N) ((N) <= 31 || (N) == ARG_POINTER_REGNUM) -/* True if register is the temporary memory location used for int/float - conversion. */ +/* True if register is the XER register. */ #define XER_REGNO_P(N) ((N) == XER_REGNO) /* Return number of consecutive hard regs needed starting at reg REGNO @@ -930,14 +929,7 @@ extern int rs6000_debug_arg; /* debug argument handling */ So make a class for registers valid as base registers. Also, cr0 is the only condition code register that can be used in - arithmetic insns, so make a separate class for it. - - There is a special 'register' (76), which is not a register, but a - placeholder for memory allocated to convert between floating point and - integral types. This works around a problem where if we allocate memory - with allocate_stack_{local,temp} and the function is an inline function, the - memory allocated will clobber memory in the caller. So we use a special - register, and if that is used, we allocate stack space for it. */ + arithmetic insns, so make a separate class for it. */ enum reg_class { @@ -1013,17 +1005,17 @@ enum reg_class reg number REGNO. This could be a conditional expression or could index an array. */ -#define REGNO_REG_CLASS(REGNO) \ - ((REGNO) == 0 ? GENERAL_REGS \ - : (REGNO) < 32 ? BASE_REGS \ - : FP_REGNO_P (REGNO) ? FLOAT_REGS \ - : (REGNO) == 68 ? CR0_REGS \ - : CR_REGNO_P (REGNO) ? CR_REGS \ - : (REGNO) == 64 ? MQ_REGS \ - : (REGNO) == 65 ? LINK_REGS \ - : (REGNO) == 66 ? CTR_REGS \ - : (REGNO) == 67 ? BASE_REGS \ - : (REGNO) == 76 ? XER_REGS \ +#define REGNO_REG_CLASS(REGNO) \ + ((REGNO) == 0 ? GENERAL_REGS \ + : (REGNO) < 32 ? BASE_REGS \ + : FP_REGNO_P (REGNO) ? FLOAT_REGS \ + : (REGNO) == CR0_REGNO ? CR0_REGS \ + : CR_REGNO_P (REGNO) ? CR_REGS \ + : (REGNO) == MQ_REGNO ? MQ_REGS \ + : (REGNO) == LINK_REGISTER_REGNUM ? LINK_REGS \ + : (REGNO) == COUNT_REGISTER_REGNUM ? CTR_REGS \ + : (REGNO) == ARG_POINTER_REGNUM ? BASE_REGS \ + : (REGNO) == XER_REGNO ? XER_REGS \ : NO_REGS) /* The class value for index registers, and the one for base regs. */ |