From 16d5e7d506d140ef004422b2cffe36b2c98403c9 Mon Sep 17 00:00:00 2001 From: Michael Meissner Date: Tue, 30 Nov 2010 20:32:07 +0000 Subject: [PATCH] Add new FMA test case From-SVN: r167312 --- gcc/testsuite/ChangeLog | 6 ++++++ gcc/testsuite/gcc.target/powerpc/ppc-fma-7.c | 18 ++++++++++++++++++ 2 files changed, 24 insertions(+) create mode 100644 gcc/testsuite/gcc.target/powerpc/ppc-fma-7.c diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 0417dec504a..1514fd0f03b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2010-11-30 Michael Meissner + + * gcc.target/powerpc/ppc-fma-7.c: New file, test that (a*b)+c and + (a*b)-c generates two fma instructions, instead of separate + multiply, add, and subtract. + 2010-11-30 Tobias Burnus * gfortran.dg/realloc_on_assign_2.f03 (invima): Assign diff --git a/gcc/testsuite/gcc.target/powerpc/ppc-fma-7.c b/gcc/testsuite/gcc.target/powerpc/ppc-fma-7.c new file mode 100644 index 00000000000..ec0c3d74075 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/ppc-fma-7.c @@ -0,0 +1,18 @@ +/* { dg-do compile { target { powerpc*-*-* } } } */ +/* { dg-skip-if "" { powerpc*-*-darwin* } { "*" } { "" } } */ +/* { dg-require-effective-target powerpc_altivec_ok } */ +/* { dg-options "-O3 -ftree-vectorize -mcpu=power6 -ffast-math" } */ +/* { dg-final { scan-assembler-times "fmadd" 1 } } */ +/* { dg-final { scan-assembler-times "fmsub " 1 } } */ +/* { dg-final { scan-assembler-not "fmul" } } */ +/* { dg-final { scan-assembler-not "fadd " } } */ + +/* Check whether the common FFT idiom (a*b)+c and (a*b)-c generates two fma + instructions, instead of a multiply, add, and subtract. */ + +void +fft (double *result, double a, double b, double c) +{ + result[0] = (a*b) + c; + result[1] = (a*b) - c; +} -- 2.30.2