From: gengqi <gen...@linux.alibaba.com>
gcc/ChangeLog:
* config/riscv/arch-canonicalize
(longext_sort): New function for sorting 'multi-letter'.
* config/riscv/multilib-generator: Skip to next loop when current
'alt' is 'arch'. The 'arch' may not be the first of 'alts'.
(_expand_combination): Add underline for the ext without '*'.
This is because, a single-letter extension can always be treated well
with a '_' prefix, but it cannot be separated out if it is appended
to a multi-letter.
---
gcc/config/riscv/arch-canonicalize | 14 +++++++++++++-
gcc/config/riscv/multilib-generator | 12 +++++++-----
2 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/gcc/config/riscv/arch-canonicalize
b/gcc/config/riscv/arch-canonicalize
index 2b4289e..a1e4570 100755
--- a/gcc/config/riscv/arch-canonicalize
+++ b/gcc/config/riscv/arch-canonicalize
@@ -74,8 +74,20 @@ def arch_canonicalize(arch):
# becasue we just append extensions list to the arch string.
std_exts += list(filter(lambda x:len(x) == 1, long_exts))
+ def longext_sort (exts):
+ if not exts.startswith("zxm") and exts.startswith("z"):
+ # If "Z" extensions are named, they should be ordered first by CANONICAL.
+ if exts[1] not in CANONICAL_ORDER:
+ raise Exception("Unsupported extension `%s`" % exts)
+ canonical_sort = CANONICAL_ORDER.index(exts[1])
+ else:
+ canonical_sort = -1
+ return (exts.startswith("x"), exts.startswith("zxm"),
+ LONG_EXT_PREFIXES.index(exts[0]), canonical_sort, exts[1:])
+
# Multi-letter extension must be in lexicographic order.
- long_exts = list(sorted(filter(lambda x:len(x) != 1, long_exts)))
+ long_exts = list(sorted(filter(lambda x:len(x) != 1, long_exts),
+ key=longext_sort))
# Put extensions in canonical order.
for ext in CANONICAL_ORDER:
diff --git a/gcc/config/riscv/multilib-generator
b/gcc/config/riscv/multilib-generator
index 64ff15f..7b22537 100755
--- a/gcc/config/riscv/multilib-generator
+++ b/gcc/config/riscv/multilib-generator
@@ -68,15 +68,15 @@ def arch_canonicalize(arch):
def _expand_combination(ext):
exts = list(ext.split("*"))
- # No need to expand if there is no `*`.
- if len(exts) == 1:
- return [(exts[0],)]
-
# Add underline to every extension.
# e.g.
# _b * zvamo => _b * _zvamo
exts = list(map(lambda x: '_' + x, exts))
+ # No need to expand if there is no `*`.
+ if len(exts) == 1:
+ return [(exts[0],)]
+
# Generate combination!
ext_combs = []
for comb_len in range(1, len(exts)+1):
@@ -147,7 +147,9 @@ for cfg in sys.argv[1:]:
# Drop duplicated entry.
alts = unique(alts)
- for alt in alts[1:]:
+ for alt in alts:
+ if alt == arch:
+ continue
arches[alt] = 1
reuse.append('march.%s/mabi.%s=march.%s/mabi.%s' % (arch, abi, alt, abi))
required.append('march=%s/mabi=%s' % (arch, abi))
--
2.7.4
