derek.holloway
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92 lines
2.9 KiB
ArmAsm
92 lines
2.9 KiB
ArmAsm
// COM: Test multi-DS stacking for the non-stride64 DS 2-address family:
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// COM: two ds_load_2addr_b32 sites before a single s_wait_dscnt 0x0
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// COM: (drain). Each split is expanded into two single-address loads
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// COM: followed by its own s_wait_dscnt 0x0 drain, and the pre-existing
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// COM: downstream drain is left in place -- so both split halves always
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// COM: complete before any consumer.
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// COM:
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// COM: Companion test:
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// COM: hotswap-trampoline-ds-nostride64.s -- non-stride64 base case
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// COM: (load b32, load b64, store b32, exchange b32, store b64,
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// COM: exchange b64, and a load+store+xchg combination kernel) drain
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// COM: forms.
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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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// RUN: %llvm-objdump -d %t.out.elf | %FileCheck --check-prefix=DISASM %s
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.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
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.text
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// ---- Kernel: 2x ds_load_2addr_b32 + drain s_wait_dscnt 0x0 ----------------
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// COM: Both DS2 instructions are replaced by s_branch to their respective
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// COM: expansion sleds. The single shared s_wait_dscnt stays at 0x0
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// COM: (drain preservation under stacking in the non-stride64 path).
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// COM: The two sleds together expand to 4 single-address ds_load_b32
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// COM: instructions; offsets (raw 1/2 and 3/4) scale by ElemBytes=4 to
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// COM: byte offsets 4/8 and 12/16 across the two sites.
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// DISASM-LABEL: <test_multi_ds_nostride64>:
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// DISASM-NOT: ds_load_2addr_b32
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// DISASM: s_branch
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// DISASM: s_branch
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// DISASM: s_wait_dscnt 0x0
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// COM: Sled 1 (first DS2 site, vdst pair v[0:1]).
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// DISASM: ds_load_b32 v0, v4 offset:4
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// DISASM-NEXT: ds_load_b32 v1, v4 offset:8
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// COM: Sled 2 (second DS2 site, vdst pair v[2:3]).
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// DISASM: ds_load_b32 v2, v4 offset:12
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// DISASM-NEXT: ds_load_b32 v3, v4 offset:16
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.globl test_multi_ds_nostride64
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.p2align 8
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.type test_multi_ds_nostride64,@function
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test_multi_ds_nostride64:
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ds_load_2addr_b32 v[0:1], v4 offset0:1 offset1:2
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ds_load_2addr_b32 v[2:3], v4 offset0:3 offset1:4
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s_wait_dscnt 0x0
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s_endpgm
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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s_nop 0
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.Ltest_multi_ds_nostride64_end:
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.size test_multi_ds_nostride64, .Ltest_multi_ds_nostride64_end-test_multi_ds_nostride64
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// COM: Idempotency: rewriting the output again should produce identical bytes.
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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 \
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// RUN: | %FileCheck --check-prefix=IDEM %s
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// IDEM: IDEMPOTENT: YES
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.rodata
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.p2align 8
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.amdhsa_kernel test_multi_ds_nostride64
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.amdhsa_next_free_vgpr 5
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.amdhsa_next_free_sgpr 1
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.end_amdhsa_kernel
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