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From ad278554860b0da7d5848262a7bf35e058266cb1 Mon Sep 17 00:00:00 2001
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From: Andreas Arnez <arnez@linux.ibm.com>
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Date: Wed, 12 Dec 2018 20:06:27 +0100
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Subject: [PATCH 5/8] Optimizations for IBM z13
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Perform some optimizations for IBM z13:
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- Compile with -O2 instead of -O.
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- Streamline vector loads/stores.
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- Define the vvrsum2 macro.
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Also, use the compile option -march=z13 instead of -march=native.
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---
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CONFIG/src/atlcomp.txt | 8 +++-----
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include/atlas_simd.h | 11 +++++------
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2 files changed, 8 insertions(+), 11 deletions(-)
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diff --git a/CONFIG/src/atlcomp.txt b/CONFIG/src/atlcomp.txt
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index aa31604..2ac71cf 100644
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--- a/CONFIG/src/atlcomp.txt
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+++ b/CONFIG/src/atlcomp.txt
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@@ -246,12 +246,10 @@ MACH=IBMz9,IBMz10,IBMz196 OS=ALL LVL=500 COMPS=f77
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'gfortran' '-O3 -funroll-loops'
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MACH=IBMz9,IBMz10,IBMz196,IBMz12 OS=ALL LVL=500 COMPS=smc,dmc,skc,dkc,icc,xcc,gcc
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'gcc' '-O3 -funroll-loops'
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-MACH=IBMz13 OS=ALL LVL=1000 COMPS=dmc,skc,dkc,icc,xcc,gcc
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- 'gcc' '-march=native -O -mvx -mzvector'
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-MACH=IBMz13 OS=ALL LVL=1000 COMPS=smc
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- 'gcc' '-march=native -O -mvx -mzvector -fno-peephole -fno-peephole2'
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+MACH=IBMz13 OS=ALL LVL=1000 COMPS=smc,dmc,skc,dkc,icc,xcc,gcc
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+ 'gcc' '-march=z13 -mtune=z13 -O2'
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MACH=IBMz13 OS=ALL LVL=1000 COMPS=f77
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- 'gfortran' '-march=native -O -mvx -mzvector'
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+ 'gfortran' '-march=z13 -mtune=z13 -O2'
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#
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# Windows defaults ; need to make SSE/SSE2 arch dep.
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#
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diff --git a/include/atlas_simd.h b/include/atlas_simd.h
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index 68daf79..f171933 100644
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--- a/include/atlas_simd.h
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+++ b/include/atlas_simd.h
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@@ -384,8 +384,8 @@
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#endif
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#define ATL_VTYPE vector double
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#if (defined(DREAL) || defined(DCPLX))
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- #define ATL_vld(v_, p_) {v_[0] = *(p_); v_[1] = (p_)[1]; }
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- #define ATL_vst(p_, v_) {*(p_) = v_[0]; (p_)[1] = v_[1];}
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+ #define ATL_vld(v_, p_) v_ = *(ATL_VTYPE *)(p_)
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+ #define ATL_vst(p_, v_) *(ATL_VTYPE *)(p_) = v_
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#else
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#define ATL_vld(v_, p_) v_ = vec_ld2f(p_);
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#define ATL_vst(p_, v_) vec_st2f(v_, p_);
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@@ -400,10 +400,9 @@
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#define ATL_vmul(d_, s1_, s2_) d_ = s1_ * s2_
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#define ATL_vmac(d_, s1_, s2_) d_ = __builtin_s390_vec_madd(s1_, s2_, d_)
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#define ATL_vvrsum1(s0_) \
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- { ATL_VTYPE t_;\
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- t_ = vec_splat(s0_, 1); \
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- s0_ += t_; \
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- }
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+ { s0_ = vec_mergeh(s0_, s0_) + vec_mergel(s0_, s0_); }
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+ #define ATL_vvrsum2(s0_, s1_) \
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+ { s0_ = vec_mergeh(s0_, s1_) + vec_mergel(s0_, s1_); }
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#define ATL_vsplat0(d_, s_) d_ = vec_splat(s_, 0)
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#define ATL_vsplat1(d_, s_) d_ = vec_splat(s_, 1)
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#elif defined(ATL_NEON) && (defined(SREAL) || defined(SCPLX))
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--
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2.23.0
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