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| author | Ian Douglas Scott <ian@iandouglasscott.com> | 2023-04-05 18:42:36 -0700 |
|---|---|---|
| committer | Ian Douglas Scott <ian@iandouglasscott.com> | 2023-04-12 17:58:15 -0700 |
| commit | 2ac8dee44fe81c75d998597d236b23470f41142e (patch) | |
| tree | 8200ee8de1dc7e97a9c8bd4260eea88df836f69b /src | |
| parent | 5ca6e98f133744d147f9c84e83482912ac840406 (diff) | |
| download | rust-2ac8dee44fe81c75d998597d236b23470f41142e.tar.gz rust-2ac8dee44fe81c75d998597d236b23470f41142e.zip | |
Add inline assembly support for m68k
Diffstat (limited to 'src')
| -rw-r--r-- | src/doc/unstable-book/src/language-features/asm-experimental-arch.md | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/doc/unstable-book/src/language-features/asm-experimental-arch.md b/src/doc/unstable-book/src/language-features/asm-experimental-arch.md index 0a48eb4f81a..1f52ab75010 100644 --- a/src/doc/unstable-book/src/language-features/asm-experimental-arch.md +++ b/src/doc/unstable-book/src/language-features/asm-experimental-arch.md @@ -16,6 +16,7 @@ This feature tracks `asm!` and `global_asm!` support for the following architect - SPIR-V - AVR - MSP430 +- M68k ## Register classes @@ -41,6 +42,9 @@ This feature tracks `asm!` and `global_asm!` support for the following architect | AVR | `reg_iw` | `r25r24`, `X`, `Z` | `w` | | AVR | `reg_ptr` | `X`, `Z` | `e` | | MSP430 | `reg` | `r[0-15]` | `r` | +| M68k | `reg` | `d[0-7]`, `a[0-7]` | `r` | +| M68k | `reg_data` | `d[0-7]` | `d` | +| M68k | `reg_addr` | `a[0-3]` | `a` | > **Notes**: > - NVPTX doesn't have a fixed register set, so named registers are not supported. @@ -70,6 +74,8 @@ This feature tracks `asm!` and `global_asm!` support for the following architect | AVR | `reg`, `reg_upper` | None | `i8` | | AVR | `reg_pair`, `reg_iw`, `reg_ptr` | None | `i16` | | MSP430 | `reg` | None | `i8`, `i16` | +| M68k | `reg`, `reg_addr` | None | `i16`, `i32` | +| M68k | `reg_data` | None | `i8`, `i16`, `i32` | ## Register aliases @@ -88,6 +94,9 @@ This feature tracks `asm!` and `global_asm!` support for the following architect | MSP430 | `r2` | `sr` | | MSP430 | `r3` | `cg` | | MSP430 | `r4` | `fp` | +| M68k | `a5` | `bp` | +| M68k | `a6` | `fp` | +| M68k | `a7` | `sp`, `usp`, `ssp`, `isp` | > **Notes**: > - TI does not mandate a frame pointer for MSP430, but toolchains are allowed @@ -98,7 +107,7 @@ This feature tracks `asm!` and `global_asm!` support for the following architect | Architecture | Unsupported register | Reason | | ------------ | --------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | All | `sp` | The stack pointer must be restored to its original value at the end of an asm code block. | -| All | `fr` (Hexagon), `$fp` (MIPS), `Y` (AVR), `r4` (MSP430) | The frame pointer cannot be used as an input or output. | +| All | `fr` (Hexagon), `$fp` (MIPS), `Y` (AVR), `r4` (MSP430), `a6` (M68k) | The frame pointer cannot be used as an input or output. | | All | `r19` (Hexagon) | This is used internally by LLVM as a "base pointer" for functions with complex stack frames. | | MIPS | `$0` or `$zero` | This is a constant zero register which can't be modified. | | MIPS | `$1` or `$at` | Reserved for assembler. | @@ -108,6 +117,7 @@ This feature tracks `asm!` and `global_asm!` support for the following architect | Hexagon | `lr` | This is the link register which cannot be used as an input or output. | | AVR | `r0`, `r1`, `r1r0` | Due to an issue in LLVM, the `r0` and `r1` registers cannot be used as inputs or outputs. If modified, they must be restored to their original values before the end of the block. | |MSP430 | `r0`, `r2`, `r3` | These are the program counter, status register, and constant generator respectively. Neither the status register nor constant generator can be written to. | +| M68k | `a4`, `a5` | Used internally by LLVM for the base pointer and global base pointer. | ## Template modifiers @@ -130,3 +140,5 @@ These flags registers must be restored upon exiting the asm block if the `preser - The status register `SREG`. - MSP430 - The status register `r2`. +- M68k + - The condition code register `ccr`. |