[COMMITTED] benchtests: Improve fmod benchmark

[Adhemerval Zanella]

The gcc implements fmod as a built-in for x86, so disable it to
benchmark the C implementation.

Also, make fmod and fmodf use the workload directive to measure
the reciprocal throughput.
---
 benchtests/Makefile     | 2 ++
 benchtests/fmod-inputs  | 6 +++---
 benchtests/fmodf-inputs | 6 +++---
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/benchtests/Makefile b/benchtests/Makefile
index 8c5704ae1fc..b4d92b1c04d 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -345,6 +345,8 @@ CFLAGS-bench-fmax.c += -fno-builtin
 CFLAGS-bench-fmaxf.c += -fno-builtin
 CFLAGS-bench-trunc.c += -fno-builtin
 CFLAGS-bench-truncf.c += -fno-builtin
+CFLAGS-bench-fmod.c += -fno-builtin
+CFLAGS-bench-fmodf.c += -fno-builtin
 CFLAGS-bench-remainder.c += -fno-builtin
 CFLAGS-bench-remainderf.c += -fno-builtin
 CFLAGS-bench-roundeven.c += -fno-builtin
diff --git a/benchtests/fmod-inputs b/benchtests/fmod-inputs
index 6f75ea122ee..37fc387f045 100644
--- a/benchtests/fmod-inputs
+++ b/benchtests/fmod-inputs
@@ -1,7 +1,7 @@
 ## args: double:double
 ## ret: double
 ## includes: math.h
-## name: subnormals
+## name: workload-subnormals
 0x0.3212f5b8c8c16p-1022, 0x0.cded0a47373e9p-1022
 0x0.809c23acfa7ddp-1022, 0x0.7f63dc5305822p-1022
 0x0.360cedf5115cdp-1022, 0x0.c9f3120aeea32p-1022
@@ -130,7 +130,7 @@
 0x0.bc8e4bc0faeb9p-1022, 0x0.4371b43f05146p-1022
 0x0.f4f1f63404c96p-1022, 0x0.0b0e09cbfb369p-1022
 0x0.05bee37594244p-1022, 0x0.fa411c8a6bdbbp-1022
-## name: normal
+## name: workload-normal
 0x1.be99ad6933c76p-740, 0x1.41665296cc389p+741
 0x1.87b8527e7cddep+690, 0x1.7847ad8183221p-689
 0x1.1d86cb84ad5fcp-944, 0x1.e279347b52a03p+945
@@ -1155,7 +1155,7 @@
 0x1.24dace6eba432p+319, 0x1.db25319145bcdp-318
 0x1.3fc7522fb956cp+578, 0x1.c038add046a93p-577
 0x1.a96e0d311a68ep-975, 0x1.5691f2cee5971p+976
-## name: close-exponents
+## name: workload-close-exponents
 0x1.88c3696801c18p-8, 0x1.773c9697fe3e8p+7
 0x1.7c4e20fb600cp-2, 0x1.83b1df049ff4p+1
 0x1.59a3ed1a02abep-6, 0x1.a65c12e5fd542p+5
diff --git a/benchtests/fmodf-inputs b/benchtests/fmodf-inputs
index be16a88ea58..9be1056ee2c 100644
--- a/benchtests/fmodf-inputs
+++ b/benchtests/fmodf-inputs
@@ -1,7 +1,7 @@
 ## args: float:float
 ## ret: float
 ## includes: math.h
-## name: subnormals
+## name: workload-subnormals
 0x1.3a3e6p-127, 0x1.8b8338p-128
 0x1.03a6cp-127, 0x1.f8b278p-128
 0x1.b8faap-127, 0x1.1c157p-129
@@ -130,7 +130,7 @@
 0x1.b4274p-128, 0x1.25ec5cp-127
 0x1.7c2bp-128, 0x1.41ea7cp-127
 0x1.90c28p-128, 0x1.379ebcp-127
-## name: normal
+## name: workload-normal
 0x1.c423f2p-11, 0x1.3bdc0cp+12
 0x1.c78066p+108, 0x1.387f98p-107
 0x1.454806p+93, 0x1.bab7f8p-92
@@ -1155,7 +1155,7 @@
 0x1.a6a72ep+32, 0x1.5958dp-31
 0x1.8cf0fcp-113, 0x1.730f02p+114
 0x1.dcbf66p-102, 0x1.234098p+103
-## name: close-exponents
+## name: workload-close-exponents
 0x1.956f8p-6, 0x1.6a908p+5
 0x1.6f04cp+2, 0x1.90fb4p-3
 0x1.1e4bcp+2, 0x1.e1b44p-3
-- 
2.43.0