derek.holloway
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54 lines
1.9 KiB
ArmAsm
54 lines
1.9 KiB
ArmAsm
// COM: Test HotSwap WMMA co-execution hazard patch: a WMMA integer
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// COM: instruction (A0 needs 8 v_nops vs B0's 4) followed by an
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// COM: overlapping VALU should get v_nop padding inserted.
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// RUN: %clang --target=amdgcn-amd-amdhsa -mcpu=gfx1250 -nostdlib %s -o %t.elf
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// RUN: 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 \
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// RUN: | %FileCheck --check-prefix=API %s
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// API: RESULT: SUCCESS
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// COM: Verify the patched layout. v_wmma_i32_16x16x64_iu8 needs 8 v_nops on
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// COM: A0; the kernel body has 0 pre-existing safe slots, so the original
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// COM: VALU site must be replaced by an s_branch to a trampoline that
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// COM: contains exactly 8 v_nops immediately followed by the relocated
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// COM: VALU. CHECK-COUNT-8 asserts the count and CHECK-NEXT pins it: any
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// COM: deviation (7 or 9 v_nops) breaks the chain.
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// RUN: %llvm-objdump -d %t.out.elf | %FileCheck --check-prefix=DISASM %s
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// DISASM: v_wmma_i32_16x16x64_iu8
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// DISASM-NEXT: s_branch
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// DISASM: s_endpgm
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// DISASM-COUNT-8: v_nop
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// DISASM-NEXT: v_add_f32
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// COM: Idempotency: second rewrite should produce identical output
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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: --output %t.out2.elf \
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// RUN: | %FileCheck --check-prefix=API2 %s
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// API2: RESULT: SUCCESS
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// RUN: cmp %t.out.elf %t.out2.elf
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.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
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.text
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.globl test_wmma_hazard
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.p2align 8
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.type test_wmma_hazard,@function
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test_wmma_hazard:
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// WMMA integer instruction: A0 needs 8 nops, B0 needs 4
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v_wmma_i32_16x16x64_iu8 v[16:23], v[0:7], v[8:15], v[16:23]
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// VALU that overlaps WMMA dest (writes v16) -- should trigger hazard
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v_add_f32 v16, v0, v1
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s_endpgm
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.Ltest_wmma_hazard_end:
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.size test_wmma_hazard, .Ltest_wmma_hazard_end-test_wmma_hazard
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.rodata
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.p2align 8
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.amdhsa_kernel test_wmma_hazard
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.amdhsa_next_free_vgpr 24
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.amdhsa_next_free_sgpr 2
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.end_amdhsa_kernel
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