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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-03-19 12:22:21 +0000
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-07-08 17:22:22 -0300
commit6ea21bfe439159f9e480c580927902c6461ec68c (patch)
tree5c48b477141f978c0c1712d6c27d69928a3d1145 /ChangeLog
parent105f2ed368ed61785a0a63ddb47fc62b89b58e0d (diff)
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powerpc: refactor logb{f,l}
The power7 logb implementation does not show a performance gain on ISA 2.07+ chips with faster floating-point to GRP instructions (currently POWER8 and POWER9). This patch moves the POWER7 implementation to generic one and enables it for POWER7. It also add some cleanup to use inline floating-point number instead of define them using static const. The performance difference is for POWER9: - Without patch: "logb": { "subnormal": { "duration": 4.99202e+09, "iterations": 8.83662e+08, "max": 75.194, "min": 5.501, "mean": 5.64925 }, "normal": { "duration": 4.97063e+09, "iterations": 9.97094e+08, "max": 46.489, "min": 4.956, "mean": 4.98512 } } - With patch: "logb": { "subnormal": { "duration": 4.97226e+09, "iterations": 9.92036e+08, "max": 77.209, "min": 4.892, "mean": 5.01218 }, "normal": { "duration": 4.96192e+09, "iterations": 1.07545e+09, "max": 12.361, "min": 4.593, "mean": 4.61382 } } The ifunc implementation is also enabled only for powerpc64. Checked on powerpc-linux-gnu (built without --with-cpu, with --with-cpu=power4 and with --with-cpu=power5+ and --disable-multi-arch), powerpc64-linux-gnu (built without --with-cp and with --with-cpu=power5+ and --disable-multi-arch). * sysdeps/powerpc/power7/fpu/s_logb.c: Move to ... * sysdeps/powerpc/fpu/s_logb.c: ... here. Use inline FP constants. * sysdeps/powerpc/power7/fpu/s_logbf.c: Move to ... * sysdeps/powerpc/fpu/s_logbf.c: ... here. Use inline FP constants. * sysdeps/powerpc/power7/fpu/s_logbl.c: Move to ... * sysdeps/powerpc/fpu/s_logbl.c: ... here. Use inline FP constants. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_logb-power7.c: Adjust implementation path. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_logbf-power7.c: Adjust implementation path. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_logbl-power7.c: Adjust implementation path. * sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile (libm-sysdep_routines): Add s_log* objects. (CFLAGS-s_logbf-power7.c, CFLAGS-s_logbl-power7.c, CFLAGS-s_logb-power7.c): New fule. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logb-power7.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logb-power7.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logb-ppc64.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logb-ppc64.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logb.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logb.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbf-power7.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbf-power7.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbf-ppc64.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbf-ppc64.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbf.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbf.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbl-power7.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbl-power7.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbl-ppc64.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbl-ppc64.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbl.c: Move to ... * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbl.c: ... here. * sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Remove file. * sysdeps/powerpc/powerpc64/power7/fpu/s_logb.c: Remove file. * sysdeps/powerpc/powerpc64/power7/fpu/s_logbf.c: Likewise. * sysdeps/powerpc/powerpc64/power7/fpu/s_logbl.c: Likewise. Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
Diffstat (limited to 'ChangeLog')
-rw-r--r--ChangeLog51
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diff --git a/ChangeLog b/ChangeLog
index c36f8fd9e6..992f4080c7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,56 @@
2019-07-08 Adhemerval Zanella <adhemerval.zanella@linaro.org>
+ * sysdeps/powerpc/power7/fpu/s_logb.c: Move to ...
+ * sysdeps/powerpc/fpu/s_logb.c: ... here. Use inline FP constants.
+ * sysdeps/powerpc/power7/fpu/s_logbf.c: Move to ...
+ * sysdeps/powerpc/fpu/s_logbf.c: ... here. Use inline FP constants.
+ * sysdeps/powerpc/power7/fpu/s_logbl.c: Move to ...
+ * sysdeps/powerpc/fpu/s_logbl.c: ... here. Use inline FP constants.
+ * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_logb-power7.c:
+ Adjust implementation path.
+ * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_logbf-power7.c:
+ Adjust implementation path.
+ * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_logbl-power7.c:
+ Adjust implementation path.
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
+ (libm-sysdep_routines): Add s_log* objects.
+ (CFLAGS-s_logbf-power7.c, CFLAGS-s_logbl-power7.c,
+ CFLAGS-s_logb-power7.c): New fule.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logb-power7.c: Move
+ to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logb-power7.c:
+ ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logb-ppc64.c: Move
+ to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logb-ppc64.c:
+ ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logb.c: Move to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logb.c: ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbf-power7.c: Move
+ to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbf-power7.c:
+ ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbf-ppc64.c: Move
+ to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbf-ppc64.c:
+ ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbf.c: Move to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbf.c: ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbl-power7.c: Move
+ to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbl-power7.c:
+ ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbl-ppc64.c: Move
+ to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbl-ppc64.c:
+ ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_logbl.c: Move to ...
+ * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_logbl.c: ... here.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Remove file.
+ * sysdeps/powerpc/powerpc64/power7/fpu/s_logb.c: Remove file.
+ * sysdeps/powerpc/powerpc64/power7/fpu/s_logbf.c: Likewise.
+ * sysdeps/powerpc/powerpc64/power7/fpu/s_logbl.c: Likewise.
+
* sysdeps/ieee754/dbl-64/wordsize-64/s_logb.c: Move to ...
* sysdeps/ieee754/dbl-64/s_logb.c: ... here. Add work around for
powerpc32 integer 0 converting to -0.