From 31a8780d0b41934c6ab5160f834f56a2d5d97f4a Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Fri, 22 May 2015 17:48:45 +0000 Subject: Fix ldbl-128 / ldbl-128ibm erfcl for -Wuninitialized The ldbl-128 and ldbl-128ibm implementations of erfcl produce uninitialized variable warnings with -Wuninitialized because of switch statements where in fact one of the cases will always be executed, but the compiler does not see that these cases cover all possibilities (and because the reasoning that it does involves inequalities on the representation of a floating point value leading to a set of possible values for 8.0 times that value, converted to int, it's highly nontrivial for the compiler to see that). This patch fixes those warnings by converting the last case in those switch statements to a "default" case. Tested for powerpc and mips64. * sysdeps/ieee754/ldbl-128/s_erfl.c (__erfcl): Make case 9 in switch statement into default case. * sysdeps/ieee754/ldbl-128ibm/s_erfl.c (__erfcl): Likewise. --- sysdeps/ieee754/ldbl-128/s_erfl.c | 2 +- sysdeps/ieee754/ldbl-128ibm/s_erfl.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'sysdeps') diff --git a/sysdeps/ieee754/ldbl-128/s_erfl.c b/sysdeps/ieee754/ldbl-128/s_erfl.c index 9bfc9c5..fa4609f 100644 --- a/sysdeps/ieee754/ldbl-128/s_erfl.c +++ b/sysdeps/ieee754/ldbl-128/s_erfl.c @@ -874,7 +874,7 @@ __erfcl (long double x) y = C19b + z * neval (z, RNr19, NRNr19) / deval (z, RDr19, NRDr19); y += C19a; break; - case 9: + default: /* i == 9. */ z = x - 1.125L; y = C20b + z * neval (z, RNr20, NRNr20) / deval (z, RDr20, NRDr20); y += C20a; diff --git a/sysdeps/ieee754/ldbl-128ibm/s_erfl.c b/sysdeps/ieee754/ldbl-128ibm/s_erfl.c index f55e8b7..f6fcf48 100644 --- a/sysdeps/ieee754/ldbl-128ibm/s_erfl.c +++ b/sysdeps/ieee754/ldbl-128ibm/s_erfl.c @@ -894,7 +894,7 @@ __erfcl (long double x) y = C19b + z * neval (z, RNr19, NRNr19) / deval (z, RDr19, NRDr19); y += C19a; break; - case 9: + default: /* i == 9. */ z = x - 1.125L; y = C20b + z * neval (z, RNr20, NRNr20) / deval (z, RDr20, NRDr20); y += C20a; -- cgit v1.1