diff options
Diffstat (limited to 'gcc/config/mips/constraints.md')
| -rw-r--r-- | gcc/config/mips/constraints.md | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/config/mips/constraints.md b/gcc/config/mips/constraints.md index 53e0189ec94..a387489f204 100644 --- a/gcc/config/mips/constraints.md +++ b/gcc/config/mips/constraints.md @@ -29,14 +29,16 @@ (define_register_constraint "f" "TARGET_HARD_FLOAT ? FP_REGS : NO_REGS" "A floating-point register (if available).") -(define_register_constraint "h" "TARGET_BIG_ENDIAN ? MD0_REG : MD1_REG" - "The @code{hi} register.") +(define_register_constraint "h" "NO_REGS" + "Formerly the @code{hi} register. This constraint is no longer supported.") (define_register_constraint "l" "TARGET_BIG_ENDIAN ? MD1_REG : MD0_REG" - "The @code{lo} register.") + "The @code{lo} register. Use this register to store values that are + no bigger than a word.") (define_register_constraint "x" "MD_REGS" - "The @code{hi} and @code{lo} registers.") + "The concatenated @code{hi} and @code{lo} registers. Use this register + to store doubleword values.") (define_register_constraint "b" "ALL_REGS" "@internal") |