The `c' operand format specifier is handled directly by the middle end
in `output_asm_insn':
%cN means require operand N to be a constant
and print the constant expression with no punctuation.
however it resorts to the target for constants that are not valid
addresses:
else if (letter == 'c')
{
if (CONSTANT_ADDRESS_P (operands[opnum]))
output_addr_const (asm_out_file, operands[opnum]);
else
output_operand (operands[opnum], 'c');
}
The VAX backend expects the fallback never to happen and overloads `c'
with the branch condition code. This is confusing however and it is not
like we are short of letters, so instead make the branch condition code
use `k', and then for consistency make `K' the reverse branch condition
code format specifier. This is safe to do as we provide no means to use
a computed branch condition code in user `asm'.
gcc/
* config/vax/vax.c (print_operand): Replace `c' and `C' with
`k' and `K' respectively.
* config/vax/vax.md (*branch, *branch_reversed): Update
accordingly.
---
gcc/config/vax/vax.c | 4 ++--
gcc/config/vax/vax.md | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/gcc/config/vax/vax.c b/gcc/config/vax/vax.c
index da4e6cb1745..0b3b76ed6da 100644
--- a/gcc/config/vax/vax.c
+++ b/gcc/config/vax/vax.c
@@ -509,9 +509,9 @@ print_operand (FILE *file, rtx x, int code)
fputc (ASM_DOUBLE_CHAR, file);
else if (code == '|')
fputs (REGISTER_PREFIX, file);
- else if (code == 'c')
+ else if (code == 'k')
fputs (cond_name (x), file);
- else if (code == 'C')
+ else if (code == 'K')
fputs (rev_cond_name (x), file);
else if (code == 'D' && CONST_INT_P (x) && INTVAL (x) < 0)
fprintf (file, "$" NEG_HWI_PRINT_HEX16, INTVAL (x));
diff --git a/gcc/config/vax/vax.md b/gcc/config/vax/vax.md
index 4897ce44505..e3018a0ee06 100644
--- a/gcc/config/vax/vax.md
+++ b/gcc/config/vax/vax.md
@@ -1111,7 +1111,7 @@ (define_insn "*branch"
(label_ref (match_operand 1 "" ""))
(pc)))]
""
- "j%c0 %l1")
+ "j%k0 %l1")
;; Recognize reversed jumps.
(define_insn "*branch_reversed"
@@ -1122,7 +1122,7 @@ (define_insn "*branch_reversed"
(pc)
(label_ref (match_operand 1 "" ""))))]
""
- "j%C0 %l1") ; %C0 negates condition
+ "j%K0 %l1") ; %K0 negates condition
;; Recognize jbs, jlbs, jbc and jlbc instructions. Note that the operand
;; of jlbs and jlbc insns are SImode in the hardware. However, if it is
--
2.11.0
