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Author	SHA1	Message	Date
Changpeng Fang	0f20a35b9e	AMDGPU: Set up User SGPRs for queue_ptr only when necessary Summary: In general, we need queue_ptr for aperture bases and trap handling, and user SGPRs have to be set up to hold queue_ptr. In current implementation, user SGPRs are set up unnecessarily for some cases. If the target has aperture registers, queue_ptr is not needed to reference aperture bases. For trap handling, if target suppots getDoorbellID, queue_ptr is also not necessary. Futher, code object version 5 introduces new kernel ABI which passes queue_ptr as an implicit kernel argument, so user SGPRs are no longer necessary for queue_ptr. Based on the trap handling document: https://llvm.org/docs/AMDGPUUsage.html#amdgpu-trap-handler-for-amdhsa-os-v4-onwards-table, llvm.debugtrap does not need queue_ptr, we remove queue_ptr suport for llvm.debugtrap in the backend. Reviewers: sameerds, arsenm Fixes: SWDEV-307189 Differential Revision: https://reviews.llvm.org/D119762	2022-03-09 10:14:05 -08:00
Matt Arsenault	e6564f39c7	AMDGPU: Emit user sgpr count directives in text asm We were emitting these in the object file but not printing them.	2022-01-26 13:51:12 -05:00
Konstantin Zhuravlyov	f4ace63737	AMDGPU: Add target id and code object v4 support - Add target id support (https://clang.llvm.org/docs/ClangOffloadBundler.html#target-id) - Add code object v4 support (https://llvm.org/docs/AMDGPUUsage.html#elf-code-object) - Add kernarg_size to kernel descriptor - Change trap handler ABI to no longer move queue pointer into s[0:1] - Cleanup ELF definitions - Add V2, V3, V4 suffixes to make a clear distinction for code object version - Consolidate note names Differential Revision: https://reviews.llvm.org/D95638	2021-03-24 11:54:05 -04:00

Author

SHA1

Message

Date

Changpeng Fang

0f20a35b9e

AMDGPU: Set up User SGPRs for queue_ptr only when necessary

Summary:
  In general, we need queue_ptr for aperture bases and trap handling,
and user SGPRs have to be set up to hold queue_ptr. In current implementation,
user SGPRs are set up unnecessarily for some cases. If the target has aperture
registers, queue_ptr is not needed to reference aperture bases. For trap
handling, if target suppots getDoorbellID, queue_ptr is also not necessary.
Futher, code object version 5 introduces new kernel ABI which passes queue_ptr
as an implicit kernel argument, so user SGPRs are no longer necessary for
queue_ptr. Based on the trap handling document:
https://llvm.org/docs/AMDGPUUsage.html#amdgpu-trap-handler-for-amdhsa-os-v4-onwards-table,
llvm.debugtrap does not need queue_ptr, we remove queue_ptr suport for llvm.debugtrap
in the backend.

Reviewers: sameerds, arsenm

Fixes: SWDEV-307189

Differential Revision: https://reviews.llvm.org/D119762

2022-03-09 10:14:05 -08:00

Matt Arsenault

e6564f39c7

AMDGPU: Emit user sgpr count directives in text asm

We were emitting these in the object file but not printing them.

2022-01-26 13:51:12 -05:00

Konstantin Zhuravlyov

f4ace63737

AMDGPU: Add target id and code object v4 support

- Add target id support (https://clang.llvm.org/docs/ClangOffloadBundler.html#target-id)
  - Add code object v4 support (https://llvm.org/docs/AMDGPUUsage.html#elf-code-object)
    - Add kernarg_size to kernel descriptor
    - Change trap handler ABI to no longer move queue pointer into s[0:1]
  - Cleanup ELF definitions
    - Add V2, V3, V4 suffixes to make a clear distinction for code object version
    - Consolidate note names

Differential Revision: https://reviews.llvm.org/D95638

2021-03-24 11:54:05 -04:00

3 Commits