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| author | Richard Henderson <rth@redhat.com> | 2002-01-14 15:27:59 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2002-01-14 15:27:59 -0800 |
| commit | ab093b81ddc469f2b78db9e3579407b2eb121c7e (patch) | |
| tree | 44fb44581c807db3e71b798bdd32bb57b32bf0de | |
| parent | d300f51fd3c83d282616e32fa5a132217f83997f (diff) | |
| download | gcc-ab093b81ddc469f2b78db9e3579407b2eb121c7e.zip gcc-ab093b81ddc469f2b78db9e3579407b2eb121c7e.tar.gz gcc-ab093b81ddc469f2b78db9e3579407b2eb121c7e.tar.bz2 | |
mips.h (HI_AND_FP_REGS): New register class.
* config/mips/mips.h (HI_AND_FP_REGS): New register class.
(CLASS_CANNOT_CHANGE_MODE): Disallow HI in little-endian mode.
From-SVN: r48852
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/mips/mips.h | 18 |
2 files changed, 20 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e72f1f0..0f70375 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-01-14 Richard Henderson <rth@redhat.com> + + * config/mips/mips.h (HI_AND_FP_REGS): New register class. + (CLASS_CANNOT_CHANGE_MODE): Disallow HI in little-endian mode. + 2002-01-14 Hans-Peter Nilsson <hp@bitrange.com> * reload1.c (reload_combine): Pass reg_sum replacement through diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h index 95df836..a6e572e 100644 --- a/gcc/config/mips/mips.h +++ b/gcc/config/mips/mips.h @@ -1942,6 +1942,7 @@ enum reg_class HI_AND_GR_REGS, /* union classes */ LO_AND_GR_REGS, HILO_AND_GR_REGS, + HI_AND_FP_REGS, ST_REGS, /* status registers (fp status) */ ALL_REGS, /* all registers */ LIM_REG_CLASSES /* max value + 1 */ @@ -1971,6 +1972,7 @@ enum reg_class "HI_AND_GR_REGS", \ "LO_AND_GR_REGS", \ "HILO_AND_GR_REGS", \ + "HI_AND_FP_REGS", \ "ST_REGS", \ "ALL_REGS" \ } @@ -2002,6 +2004,7 @@ enum reg_class { 0xffffffff, 0x00000000, 0x00000001 }, /* union classes */ \ { 0xffffffff, 0x00000000, 0x00000002 }, \ { 0xffffffff, 0x00000000, 0x00000004 }, \ + { 0x00000000, 0xffffffff, 0x00000001 }, \ { 0x00000000, 0x00000000, 0x000007f8 }, /* status registers */ \ { 0xffffffff, 0xffffffff, 0x000007ff } /* all registers */ \ } @@ -2229,10 +2232,19 @@ extern enum reg_class mips_char_to_class[256]; : CLASS_UNITS (MODE, UNITS_PER_WORD)) /* If defined, gives a class of registers that cannot be used as the - operand of a SUBREG that changes the mode of the object illegally. */ + operand of a SUBREG that changes the mode of the object illegally. -#define CLASS_CANNOT_CHANGE_MODE \ - (TARGET_FLOAT64 && ! TARGET_64BIT ? FP_REGS : NO_REGS) + When FP regs are larger than integer regs... Er, anyone remember what + goes wrong? + + In little-endian mode, the hi-lo registers are numbered backwards, + so (subreg:SI (reg:DI hi) 0) gets the high word instead of the low + word as intended. */ + +#define CLASS_CANNOT_CHANGE_MODE \ + (TARGET_BIG_ENDIAN \ + ? (TARGET_FLOAT64 && ! TARGET_64BIT ? FP_REGS : NO_REGS) \ + : (TARGET_FLOAT64 && ! TARGET_64BIT ? HI_AND_FP_REGS : HI_REG)) /* Defines illegal mode changes for CLASS_CANNOT_CHANGE_MODE. */ |