// COM: The target gfx1250 has no block-16 scaled WMMA, so the rewrite lowers
// COM: 16x16x128_f8f6f4 exactly into two block-32 WMMAs chained through the
// COM: accumulator: each pass masks matrix A to one 16-K subblock (a lane mask
// COM: for FP8), copies matrix B into the same scratch bank, and byte-gathers
// COM: the matching block-16 scales. When the scratch budget is unavailable it
// COM: fails closed (see the 32x16 refuse test).

// RUN: %clang -target amdgcn-amd-amdhsa -mcpu=gfx1250 -nostdlib %s -o %t.elf
// RUN: hotswap-rewrite %t.elf \
// RUN:   amdgcn-amd-amdhsa--gfx1250 amdgcn-amd-amdhsa--gfx1250 \
// RUN:   --output %t.out.elf \
// RUN:   | %FileCheck --check-prefix=RESULT %s
// RESULT: RESULT: SUCCESS

// RUN: %llvm-objdump -d %t.out.elf | %FileCheck --check-prefix=DISASM %s
// COM: block-16 form gone, replaced by the two block-32 passes: pass-low masks
// COM: the low-16 subblock (lane mask 0xffff), pass-high the high-16
// COM: (0xffff0000), the second accumulating onto the first through v[0:7].
// DISASM-NOT: v_wmma_scale16
// DISASM: s_mov_b32 s{{[0-9]+}}, 0xffff {{.*$}}
// DISASM: v_cndmask_b32_e64
// DISASM: v_wmma_scale_f32_16x16x128_f8f6f4 v[0:7], v[{{[0-9]+}}:{{[0-9]+}}], v[{{[0-9]+}}:{{[0-9]+}}], v[0:7],
// COM: exactly one gfx1250 hazard v_nop before the pass-high lane-mask VALU that
// COM: overwrites the masked-A scratch block.
// DISASM-COUNT-1: v_nop
// DISASM-NEXT: s_mov_b32 s{{[0-9]+}}, 0xffff0000
// DISASM: v_cndmask_b32_e64
// DISASM: v_wmma_scale_f32_16x16x128_f8f6f4 v[0:7], v[{{[0-9]+}}:{{[0-9]+}}], v[{{[0-9]+}}:{{[0-9]+}}], v[0:7],

.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
.text

// --- Scale16 16x16 (block-16) -> exact lane-masked K-split ---
.globl test_wmma_scale16_16x16
.p2align 8
.type test_wmma_scale16_16x16,@function
test_wmma_scale16_16x16:
  v_wmma_scale16_f32_16x16x128_f8f6f4 v[0:7], v[16:31], v[32:47], v[0:7], v[48:49], v[50:51]
  s_endpgm
.Ltest_wmma_scale16_16x16_end:
.size test_wmma_scale16_16x16, .Ltest_wmma_scale16_16x16_end-test_wmma_scale16_16x16

.rodata
.p2align 8
.amdhsa_kernel test_wmma_scale16_16x16
  .amdhsa_next_free_vgpr 52
  .amdhsa_next_free_sgpr 2
  .amdhsa_wavefront_size32 1
.end_amdhsa_kernel

.amdgpu_metadata
  amdhsa.version:
    - 3
    - 0
  amdhsa.kernels:
    - .name: test_wmma_scale16_16x16
      .symbol: test_wmma_scale16_16x16.kd
      .sgpr_count: 2
      .vgpr_count: 52
      .kernarg_segment_size: 0
      .group_segment_fixed_size: 0
      .private_segment_fixed_size: 0
      .kernarg_segment_align: 8
      .wavefront_size: 32
      .max_flat_workgroup_size: 256
.end_amdgpu_metadata
