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ckastnerckastner
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ggml-cpu: Limit ARM GGML_CPU_ALL_VARIANTS to Linux for now
The other platforms will need their own specific variants. This also fixes the bug that the the variant-building branch was always being executed as the else-branch of GGML_NATIVE=OFF. The branch is moved to an elseif-branch which restores the previous behavior.
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2 files changed

+46
-45
lines changed

2 files changed

+46
-45
lines changed

‎ggml/src/CMakeLists.txt‎

Lines changed: 4 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -295,6 +295,8 @@ ggml_add_backend(CPU)
295295
if (GGML_CPU_ALL_VARIANTS)
296296
if (NOT GGML_BACKEND_DL)
297297
message(FATAL_ERROR "GGML_CPU_ALL_VARIANTS requires GGML_BACKEND_DL")
298+
elseif (GGML_CPU_ARM_ARCH)
299+
message(FATAL_ERROR "Cannot use both GGML_CPU_ARM_ARCH and GGML_CPU_ALL_VARIANTS")
298300
endif()
299301
if (GGML_SYSTEM_ARCH STREQUAL "x86")
300302
ggml_add_cpu_backend_variant(x64)
@@ -308,10 +310,7 @@ if (GGML_CPU_ALL_VARIANTS)
308310
# MSVC doesn't support AMX
309311
ggml_add_cpu_backend_variant(sapphirerapids SSE42 AVX F16C AVX2 BMI2 FMA AVX512 AVX512_VBMI AVX512_VNNI AVX512_BF16 AMX_TILE AMX_INT8)
310312
endif()
311-
elseif(GGML_SYSTEM_ARCH STREQUAL "ARM")
312-
if (GGML_CPU_ARM_ARCH)
313-
message(FATAL_ERROR "Cannot use both GGML_CPU_ARM_ARCH and GGML_CPU_ALL_VARIANTS")
314-
endif()
313+
elseif(GGML_SYSTEM_ARCH STREQUAL "ARM" AND CMAKE_SYSTEM_NAME MATCHES "Linux")
315314
# Many of these features are optional so we build versions with popular
316315
# combinations and name the backends based on the version they were
317316
# first released with
@@ -324,7 +323,7 @@ if (GGML_CPU_ALL_VARIANTS)
324323
ggml_add_cpu_backend_variant(armv9.2_1 DOTPROD FP16_VECTOR_ARITHMETIC SVE MATMUL_INT8 SME)
325324
ggml_add_cpu_backend_variant(armv9.2_2 DOTPROD FP16_VECTOR_ARITHMETIC SVE MATMUL_INT8 SVE2 SME)
326325
else()
327-
message(FATAL_ERROR "GGML_CPU_ALL_VARIANTS not yet supported on ${GGML_SYSTEM_ARCH}")
326+
message(FATAL_ERROR "GGML_CPU_ALL_VARIANTS not yet supported with ${GGML_SYSTEM_ARCH} on ${CMAKE_SYSTEM_NAME}")
328327
endif()
329328
elseif (GGML_CPU)
330329
ggml_add_cpu_backend_variant_impl("")

‎ggml/src/ggml-cpu/CMakeLists.txt‎

Lines changed: 42 additions & 40 deletions
Original file line numberDiff line numberDiff line change
@@ -157,47 +157,49 @@ function(ggml_add_cpu_backend_variant_impl tag_name)
157157
else()
158158
if (GGML_CPU_ARM_ARCH)
159159
list(APPEND ARCH_FLAGS -march=${GGML_CPU_ARM_ARCH})
160-
else()
161-
# Begin with the lowest baseline
162-
set(ARM_MCPU "armv8-a")
163-
set(ARCH_TAGS "")
164-
set(ARCH_DEFINITIONS "")
165-
166-
# When a feature is selected, bump the MCPU to the first
167-
# version that supported it
168-
if (GGML_INTERNAL_DOTPROD)
169-
set(ARM_MCPU "armv8.2-a")
170-
set(ARCH_TAGS "${ARCH_TAGS}+dotprod")
171-
list(APPEND ARCH_DEFINITIONS GGML_USE_DOTPROD)
172-
endif()
173-
if (GGML_INTERNAL_FP16_VECTOR_ARITHMETIC)
174-
set(ARM_MCPU "armv8.2-a")
175-
set(ARCH_TAGS "${ARCH_TAGS}+fp16")
176-
list(APPEND ARCH_DEFINITIONS GGML_USE_FP16_VECTOR_ARITHMETIC)
177-
endif()
178-
if (GGML_INTERNAL_SVE)
179-
set(ARM_MCPU "armv8.2-a")
180-
set(ARCH_TAGS "${ARCH_TAGS}+sve")
181-
list(APPEND ARCH_DEFINITIONS GGML_USE_SVE)
182-
endif()
183-
if (GGML_INTERNAL_MATMUL_INT8)
184-
set(ARM_MCPU "armv8.6-a")
185-
set(ARCH_TAGS "${ARCH_TAGS}+i8mm")
186-
list(APPEND ARCH_DEFINITIONS GGML_USE_MATMUL_INT8)
187-
endif()
188-
if (GGML_INTERNAL_SVE2)
189-
set(ARM_MCPU "armv8.6-a")
190-
set(ARCH_TAGS "${ARCH_TAGS}+sve2")
191-
list(APPEND ARCH_DEFINITIONS GGML_USE_SVE2)
192-
endif()
193-
if (GGML_INTERNAL_SME)
194-
set(ARM_MCPU "armv9.2-a")
195-
set(ARCH_TAGS "${ARCH_TAGS}+sme")
196-
list(APPEND ARCH_DEFINITIONS GGML_USE_SME)
197-
endif()
160+
elseif(GGML_CPU_ALL_VARIANTS)
161+
if (CMAKE_SYSTEM_NAME MATCHES "Linux")
162+
# Begin with the lowest baseline
163+
set(ARM_MCPU "armv8-a")
164+
set(ARCH_TAGS "")
165+
set(ARCH_DEFINITIONS "")
166+
167+
# When a feature is selected, bump the MCPU to the first
168+
# version that supported it
169+
if (GGML_INTERNAL_DOTPROD)
170+
set(ARM_MCPU "armv8.2-a")
171+
set(ARCH_TAGS "${ARCH_TAGS}+dotprod")
172+
list(APPEND ARCH_DEFINITIONS GGML_USE_DOTPROD)
173+
endif()
174+
if (GGML_INTERNAL_FP16_VECTOR_ARITHMETIC)
175+
set(ARM_MCPU "armv8.2-a")
176+
set(ARCH_TAGS "${ARCH_TAGS}+fp16")
177+
list(APPEND ARCH_DEFINITIONS GGML_USE_FP16_VECTOR_ARITHMETIC)
178+
endif()
179+
if (GGML_INTERNAL_SVE)
180+
set(ARM_MCPU "armv8.2-a")
181+
set(ARCH_TAGS "${ARCH_TAGS}+sve")
182+
list(APPEND ARCH_DEFINITIONS GGML_USE_SVE)
183+
endif()
184+
if (GGML_INTERNAL_MATMUL_INT8)
185+
set(ARM_MCPU "armv8.6-a")
186+
set(ARCH_TAGS "${ARCH_TAGS}+i8mm")
187+
list(APPEND ARCH_DEFINITIONS GGML_USE_MATMUL_INT8)
188+
endif()
189+
if (GGML_INTERNAL_SVE2)
190+
set(ARM_MCPU "armv8.6-a")
191+
set(ARCH_TAGS "${ARCH_TAGS}+sve2")
192+
list(APPEND ARCH_DEFINITIONS GGML_USE_SVE2)
193+
endif()
194+
if (GGML_INTERNAL_SME)
195+
set(ARM_MCPU "armv9.2-a")
196+
set(ARCH_TAGS "${ARCH_TAGS}+sme")
197+
list(APPEND ARCH_DEFINITIONS GGML_USE_SME)
198+
endif()
198199

199-
list(APPEND ARCH_FLAGS "-march=${ARM_MCPU}${ARCH_TAGS}")
200-
ggml_add_cpu_backend_features(${GGML_CPU_NAME} arm ${ARCH_DEFINITIONS})
200+
list(APPEND ARCH_FLAGS "-march=${ARM_MCPU}${ARCH_TAGS}")
201+
ggml_add_cpu_backend_features(${GGML_CPU_NAME} arm ${ARCH_DEFINITIONS})
202+
endif()
201203
endif()
202204
endif()
203205

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