derek.holloway
7502bf64a4
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79 lines
3.2 KiB
ArmAsm
79 lines
3.2 KiB
ArmAsm
// Verify that a Scale16 lowering recovers its incoming VGPR-MSB mode from the
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// local straight-line setter when object-wide CFG recovery is unavailable.
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//
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// The register-target call gives the object an unresolved control-flow target,
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// which declines the whole-function mode analysis. The Scale16 is preceded
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// immediately by its own s_set_vgpr_msb, so its original operands already
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// depend on that setter and the local scan may supply the mode.
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//
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// hotswap-wmma-scale16-local-vgpr-msb-reject.s is the matching negative: the
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// same unresolved call with no local setter must fail closed. The pair is what
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// proves the local scan, rather than the CFG analysis, supplied the mode here.
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// RUN: %clang -target amdgcn-amd-amdhsa -mcpu=gfx1250 -nostdlib %s -o %t.elf
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// RUN: env AMD_COMGR_EMIT_VERBOSE_LOGS=1 hotswap-rewrite %t.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250 amdgcn-amd-amdhsa--gfx1250 \
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// RUN: --output %t.out.elf 2>&1 | %FileCheck --check-prefix=API %s
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// COM: Object-wide mode recovery is declined ...
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// API: unresolved call target
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// COM: ... yet the required lowering still applies.
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// API: wmma_scale16: exact K-split
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// API: RESULT: SUCCESS
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// RUN: %llvm-objdump -d %t.out.elf | %FileCheck --check-prefix=DISASM %s
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// DISASM-LABEL: <test_scale16_local_mode>:
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// DISASM-NOT: v_wmma_scale16
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// COM: The recovered mode must be the locally established 0x5, so matrix A is
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// COM: gathered from bank 1. A mode-zero fallback would read v16 instead of
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// COM: v272 and silently feed the replacements the wrong matrix.
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// DISASM: v_mov_b32_e32 v8, v16{{.*v272.*}}
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// COM: Both replacement passes consume the masked low-bank A and the gathered
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// COM: even/odd scale pairs. Matrix B's incoming src1 bank already matches the
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// COM: scratch bank, so both passes read the original v[288:295] in place
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// COM: rather than an above-KD copy of it.
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// DISASM: v_wmma_scale_f32_16x16x128_f8f6f4 v[0:7], v[8:15], v[32:39]{{.*v\[288:295\].*}}v16, v17
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// DISASM: v_wmma_scale_f32_16x16x128_f8f6f4 v[0:7], v[8:15], v[32:39]{{.*v\[288:295\].*}}v18, v19
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// RUN: hotswap-rewrite %t.out.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250 amdgcn-amd-amdhsa--gfx1250 \
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// RUN: --check-idempotent | %FileCheck --check-prefix=IDEM %s
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// IDEM: IDEMPOTENT: YES
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.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
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.text
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.globl test_scale16_local_mode
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.p2align 8
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.type test_scale16_local_mode,@function
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test_scale16_local_mode:
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s_set_vgpr_msb 0x5
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v_wmma_scale16_f32_16x16x128_f8f6f4 v[0:7], v[16:23], v[32:39], v[0:7], v[48:49], v[50:51] matrix_a_fmt:MATRIX_FMT_FP4 matrix_b_fmt:MATRIX_FMT_FP4
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s_swap_pc_i64 s[30:31], s[0:1]
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s_endpgm
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.Ltest_scale16_local_mode_end:
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.size test_scale16_local_mode, .Ltest_scale16_local_mode_end-test_scale16_local_mode
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.rodata
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.p2align 8
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.amdhsa_kernel test_scale16_local_mode
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.amdhsa_next_free_vgpr 304
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.amdhsa_next_free_sgpr 32
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.amdhsa_wavefront_size32 1
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.end_amdhsa_kernel
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.amdgpu_metadata
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amdhsa.version:
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- 3
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- 0
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amdhsa.kernels:
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- .name: test_scale16_local_mode
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.symbol: test_scale16_local_mode.kd
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.sgpr_count: 32
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.vgpr_count: 304
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.kernarg_segment_size: 0
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.group_segment_fixed_size: 0
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.private_segment_fixed_size: 0
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.kernarg_segment_align: 8
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.wavefront_size: 32
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.max_flat_workgroup_size: 256
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.end_amdgpu_metadata
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