esp-16.0.0-20230516

Changes (since esp-15.0.0-20230404):

Features:

• Upgraded LLVM version to 16.0.0.
• Added support for complier-rt library. Now toolchain is supplied with complier-rt library. complier-rt multilib feature is supported for RISCV and Xtensa targets.
• Built newlib with -ffunction-sections and -fdata-sections flags.
• [Xtensa] Implemented __ieee754_sqrtf builtin.

Bug Fixes:

• [Xtensa] Fix i8/i16 ABI alignment. Fixes problem reported in #66.

esp-15.0.0-20230404

Changes (since esp-15.0.0-20221201):

Features:

• [Xtensa] Implements constant islands pass. For large code models it allows to intersperse code with constants, because sometimes L32R instruction range in immediate field is not enough.
• [LLD][Xtensa] Cover DIFF{8, 16, 32} relocations.
• [Xtensa] Improves fixup error messages in asm backend. Adds different diagnostic messages for different branch
  relocation fixups.

Bug Fixes:

• [Xtensa] Fixes HW loop pass. Fixes HW loop miscompilation with opt-level = 's'. See esp-rs/rust#164
• [Xtensa] Disables hardware loops by default.

esp-15.0.0-20221201

Changes (since esp-15.0.0-20221014):

Features:

• [Xtensa] Add LLD linker support.
• [Xtensa] Add support for -mtext-section-literals option. See description of the same option in GNU assembler.
• [Xtensa] Add support of the -mcmodel=large option. Currently it just enables -mtext-section-literals.
• Removed dependency on terminfo library. Previous release for Linux systems had a dependency on libtinfo5 which is pretty old version.
• Added nano versions of libc, libm and libg to toolchain.

Bug Fixes:

• [Xtensa] Fixed lowering funnel shift left. Previous implementation generated incorrect Xtensa instruction sequence.
• [Xtensa] Made it possible to use -fuse-ld when GCC toolchain is detected. Previosuly toolchain always used GNU xtensa linker.

esp-15.0.0-20221014

Changes (since esp-14.0.0-20220415):

Features:

• Upgrade LLVM version to 15.0.0
• Single toolchain for any Espressif chip (either Xtensa or RISCV architectures)
• Distribution for Linux ARM and ARM64 platforms. Closes #61.
• Distribution for MacOS ARM64 platform. Closes #61.
• Minimal distributions including libraries and headers only to be used by 3rd party tools (e.g. Espressif Rust port)
• Support Espressif vendor in target triple: xtensa-esp-elf and riscv32-esp-elf

Bug Fixes:

• [Xtensa] Fixes broken inline assembly memory operands. Closes #58.
• [Xtensa] Expand addi instruction with large immediate, to addmi + addi.
• [Xtensa] Implement support of .literal and .region directives in assembler parser.
• [Xtensa] Add bbci.l macro for bbci instruction and bbsi.l for bbsi.
• [Xtensa] Fix ill.n instruction encoding
• [Xtensa] Implement support of the --sysroot clang option. Closes #56.

esp-15.0.0-20220922

This is a release candidate.

Features:

• Upgrade LLVM version to 15.0.0
• Single toolchain for any Espressif chip (either Xtensa or RISCV architectures)
• Distribution for Linux ARM and ARM64 platforms. Closes #61.
• Distribution for MacOS ARM64 platform. Closes #61.
• Minimal distributions including libraries and headers only to be used by 3rd party tools (e.g. Espressif Rust port)
• Support Espressif vendor in target triple: xtensa-esp-elf and riscv32-esp-elf

Bug Fixes:

• [Xtensa] Fixes broken inline assembly memory operands. Closes #58.
• [Xtensa] Expand addi instruction with large immediate, to addmi + addi.
• [Xtensa] Implement support of .literal and .region directives in assembler parser.
• [Xtensa] Add bbci.l macro for bbci instruction and bbsi.l for bbsi.
• [Xtensa] Fix ill.n instruction encoding
• [Xtensa] Implement support of the --sysroot clang option. Closes #56.

Known issues:

• [Xtensa] Arguments wider than 32 bits are passed to functions incorrectly

esp-14.0.0-20220415

Changes (since esp-13.0.0-20211203):

• Upgraded to LLVM-14
• Fixed FP compare operations
• Improved multilib support in the Xtensa Clang toolchain
• Fixed Hardware Loop implementation
• Fixed implementation of the atomic swap operations for 8/16 bit operands.

esp-13.0.0-20211203

Changes (since esp-12.0.1-20210914)

• Upgraded to LLVM-13
• Implemented ESP32-S3 target
• Implemented multilib support in the Xtensa Clang toolchain
• Added Xtensa MUL16 instructions
• Fixed ESP32-S2 target
• Fixed FP instructions descriptions, added support of the fma, powf and other FP intrinsics.
• Fixed Hardware Loop implementation

esp-12.0.1-20210914

Changes (since esp-12.0.1-20210823)

• Added -fno-use-cxa-atexit to the default compile options (wrapper), to by sync with the GCC toolchain
• Added macos-amd64 build

esp-12.0.1-20210823

esp-12.0.1-20210823

esp-11.0.0-20210728

Xtensa based on llvm 11.0.0