From a0aaa3552d53b20a99566ac7116063fbb31b9964 Mon Sep 17 00:00:00 2001 From: xleroy Date: Wed, 3 Jul 2013 15:07:17 +0000 Subject: Treat casts int64 -> float32 as primitive operations instead of two casts int64 -> float64 -> float32. The latter causes double rounding errors. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2290 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e --- test/regression/int64.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'test/regression/int64.c') diff --git a/test/regression/int64.c b/test/regression/int64.c index 5b32ccd9..0012216f 100644 --- a/test/regression/int64.c +++ b/test/regression/int64.c @@ -38,6 +38,7 @@ static void test1(u64 x, u64 y) s64 y3; int i; double f; + float s; printf("x = %llx\n", x); printf("y = %llx\n", y); @@ -75,6 +76,10 @@ static void test1(u64 x, u64 y) printf("stod x = %llx\n", *((u64*) &f)); f = f * 0.0001; printf("dtos f = %llx\n", (s64) f); + s = (float) x; + printf("utof x = %x\n", *((unsigned*) &s)); + s = (float) ((s64) x); + printf("stof x = %x\n", *((unsigned*) &s)); printf("\n"); } -- cgit