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Switch power to use O3 instead of Ofast #5323

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Merged
martin-frbg merged 1 commit into from
Jun 20, 2025
Merged

Switch power to use O3 instead of Ofast #5323

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12 changes: 6 additions & 6 deletions Makefile.power
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Original file line number Diff line number Diff line change
Expand Up @@ -13,16 +13,16 @@ ifeq ($(CORE), POWER10)
ifneq ($(C_COMPILER), PGI)
ifeq ($(C_COMPILER), GCC)
ifeq ($(GCCVERSIONGTEQ10), 1)
CCOMMON_OPT += -Ofast -mcpu=power10 -mtune=power10 -mvsx -fno-fast-math
CCOMMON_OPT += -O3 -mcpu=power10 -mtune=power10 -mvsx -fno-fast-math
else ifneq ($(GCCVERSIONGT4), 1)
$(warning your compiler is too old to fully support POWER9, getting a newer version of gcc is recommended)
CCOMMON_OPT += -Ofast -mcpu=power8 -mtune=power8 -mvsx -fno-fast-math
CCOMMON_OPT += -O3 -mcpu=power8 -mtune=power8 -mvsx -fno-fast-math
else
$(warning your compiler is too old to fully support POWER10, getting a newer version of gcc is recommended)
CCOMMON_OPT += -Ofast -mcpu=power9 -mtune=power9 -mvsx -fno-fast-math
CCOMMON_OPT += -O3 -mcpu=power9 -mtune=power9 -mvsx -fno-fast-math
endif
else
CCOMMON_OPT += -Ofast -mcpu=power10 -mtune=power10 -mvsx -fno-fast-math
CCOMMON_OPT += -O3 -mcpu=power10 -mtune=power10 -mvsx -fno-fast-math
endif
ifeq ($(F_COMPILER), IBM)
FCOMMON_OPT += -O2 -qrecur -qnosave -qarch=pwr10 -qtune=pwr10 -qfloat=nomaf -qzerosize
Expand All @@ -34,7 +34,7 @@ endif

ifeq ($(CORE), POWER9)
ifneq ($(C_COMPILER), PGI)
CCOMMON_OPT += -Ofast -mvsx -fno-fast-math
CCOMMON_OPT += -O3 -mvsx -fno-fast-math
ifeq ($(C_COMPILER), GCC)
ifneq ($(GCCVERSIONGT4), 1)
$(warning your compiler is too old to fully support POWER9, getting a newer version of gcc is recommended)
Expand Down Expand Up @@ -70,7 +70,7 @@ endif

ifeq ($(CORE), POWER8)
ifneq ($(C_COMPILER), PGI)
CCOMMON_OPT += -Ofast -mcpu=power8 -mtune=power8 -mvsx -fno-fast-math
CCOMMON_OPT += -O3 -mcpu=power8 -mtune=power8 -mvsx -fno-fast-math
else
CCOMMON_OPT += -fast -Mvect=simd -Mcache_align
endif
Expand Down
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