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shader: support DS_WRITE_B8_D16_HI (#794)

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Decode GFX10 DS opcode 0xa0 as DS_WRITE_B8_D16_HI (next to
DS_WRITE_B16_D16_HI at 0xa1) and lower it through the existing 8-bit
shared-memory write. The stored byte is bits 23:16 of the data VGPR,
selected with SDWA BYTE_2 on src1.

Add captured-instruction decode coverage (from GTA V, PPSA04264) and a
runtime regression that writes one byte of a distinctive source value
into a pre-filled LDS dword.
This commit is contained in:
Deniz ŞAHİN
2026-09-23 23:44:39 +03:00
committed by GitHub
parent 569ec04d1a
commit fc86509aac
6 changed files with 60 additions and 1 deletions
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src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.cpp
+1
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@@ -694,6 +694,7 @@ std::string InstructionToString(const Instruction& inst) {
case Opcode::DS_READ_B128:
case Opcode::DS_WRITE_B8:
case Opcode::DS_WRITE_B16:
case Opcode::DS_WRITE_B8_D16_HI:
case Opcode::DS_WRITE_B16_D16_HI:
case Opcode::DS_WRITE2_B32:
case Opcode::DS_WRITE2ST64_B32: