derek.holloway
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60 lines
2.5 KiB
ArmAsm
60 lines
2.5 KiB
ArmAsm
// A kernel-descriptor entry that points into a function interior is a real ABI
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// entry point even when no intra-object branch or call reaches it. The VGPR-MSB
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// analysis must seed that declared entry so the interior block is analyzed from
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// the entry mode and the local s_set_vgpr_msb before the WMMA is honored,
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// instead of being treated as unreachable and read as mode 0. The function
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// symbol start terminates immediately, so the interior KD-entry block is only
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// reachable through the descriptor; its s_set_vgpr_msb selects bank 0x60, so a
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// correct split must bracket the crossing half for 0x60 (0x6050 / 0x5060). A
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// mode-0 misread would emit no bracket at all.
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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:gfx1250-b0-specific+ \
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// RUN: amdgcn-amd-amdhsa--gfx1250:gfx1250-b0-specific- \
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// RUN: --output %t.out.elf 2>&1 | %FileCheck --check-prefix=API %s
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// API-NOT: error:
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// API-COUNT-1: WMMA split: patched v_wmma_f32_16x16x128_fp8_fp8
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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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// The A0-incompatible K=128 form must not survive, and the seeded 0x60 mode
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// must produce the bank-crossing brackets around the second K=64 half.
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// DISASM-NOT: v_wmma_f32_16x16x128_fp8_fp8
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// DISASM: v_wmma_f32_16x16x64_fp8_fp8
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// DISASM-NEXT: s_set_vgpr_msb 0x6050
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// DISASM-NEXT: v_wmma_f32_16x16x64_fp8_fp8
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// DISASM-NEXT: s_set_vgpr_msb 0x5060
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// RUN: hotswap-rewrite %t.out.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250:gfx1250-b0-specific- \
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// RUN: amdgcn-amd-amdhsa--gfx1250:gfx1250-b0-specific- \
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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_kd_interior
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.p2align 8
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.type test_kd_interior,@function
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test_kd_interior:
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// The symbol-start path terminates, so nothing falls through into the
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// interior block below; it is reachable only via the kernel-descriptor entry.
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s_endpgm
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.Lkd_entry:
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s_set_vgpr_msb 0x60
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v_wmma_f32_16x16x128_fp8_fp8 v[32:39], v[0:15], v[16:31], 0
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s_endpgm
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.size test_kd_interior, .-test_kd_interior
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// Hand-built kernel descriptor whose kernel_code_entry_byte_offset (at offset
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// 0x10) resolves to the interior .Lkd_entry block rather than the symbol start.
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.rodata
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.p2align 6
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.type test_kd_interior.kd,@object
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.size test_kd_interior.kd, 64
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test_kd_interior.kd:
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.zero 16
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.quad .Lkd_entry - test_kd_interior.kd
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.zero 40
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