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| author | Michael Forney <mforney@mforney.org> | 2021-05-02 11:52:48 -0700 |
|---|---|---|
| committer | Michael Forney <mforney@mforney.org> | 2021-05-02 11:56:52 -0700 |
| commit | 197fc75ab9850402b47d79da2e6cde47c8deb7d4 (patch) | |
| tree | fcddeb4d218a436bc11b57fc9c5caf26f8659948 | |
| parent | 3c17cff77ccee8c90d5ffea02b7cc8f7e828a4b8 (diff) | |
| download | cproc-197fc75ab9850402b47d79da2e6cde47c8deb7d4.tar.xz | |
qbe: Use fixed precision of 17 when printing floating point constants
It appears that some operating systems don't yet support the C11
DBL_DECIMAL_DIG. In order to ensure consistent output no matter the
precision of long double (which varies from arch to arch), just use
a fixed 17, which is sufficient for IEEE 754 binary64.
| -rw-r--r-- | qbe.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -1039,7 +1039,7 @@ emitvalue(struct value *v) switch (v->kind) { case VALUE_CONST: if (v->repr->base == 's' || v->repr->base == 'd') - printf("%c_%.*g", v->repr->base, DBL_DECIMAL_DIG, v->f); + printf("%c_%.17g", v->repr->base, v->f); else printf("%" PRIu64, v->i); break; @@ -1275,7 +1275,7 @@ dataitem(struct expr *expr, uint64_t size) break; case EXPRCONST: if (expr->type->prop & PROPFLOAT) - printf("%c_%.*g", expr->type->size == 4 ? 's' : 'd', DECIMAL_DIG, expr->constant.f); + printf("%c_%.17g", expr->type->size == 4 ? 's' : 'd', expr->constant.f); else printf("%" PRIu64, expr->constant.i); break; |