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Removes reg aliases since there are many ABIs: o32/n32/n64

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This commit is contained in:
Lzu Tao 2020-10-04 07:30:01 +00:00
parent 79f477bb1f
commit 4d570fb45e
2 changed files with 32 additions and 35 deletions
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64
compiler/rustc_target/src/asm/mips.rs
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@ -45,31 +45,31 @@ impl MipsInlineAsmRegClass {
// The reserved registers are somewhat taken from <https://git.io/JUR1k#L150>.
def_regs! {
Mips MipsInlineAsmReg MipsInlineAsmRegClass {
v0: reg = ["$2", "$v0"],
v1: reg = ["$3", "$v1"],
a0: reg = ["$4", "$a0"],
a1: reg = ["$5", "$a1"],
a2: reg = ["$6", "$a2"],
a3: reg = ["$7", "$a3"],
r2: reg = ["$2"],
r3: reg = ["$3"],
r4: reg = ["$4"],
r5: reg = ["$5"],
r6: reg = ["$6"],
r7: reg = ["$7"],
// FIXME: Reserve $t0, $t1 if in mips16 mode.
t0: reg = ["$8", "$t0"],
t1: reg = ["$9", "$t1"],
t2: reg = ["$10", "$t2"],
t3: reg = ["$11", "$t3"],
t4: reg = ["$12", "$t4"],
t5: reg = ["$13", "$t5"],
t6: reg = ["$14", "$t6"],
t7: reg = ["$15", "$t7"],
s0: reg = ["$16", "$s0"],
s1: reg = ["$17", "$s1"],
s2: reg = ["$18", "$s2"],
s3: reg = ["$19", "$s3"],
s4: reg = ["$20", "$s4"],
s5: reg = ["$21", "$s5"],
s6: reg = ["$22", "$s6"],
s7: reg = ["$23", "$s7"],
t8: reg = ["$24", "$t8"],
t9: reg = ["$25", "$t9"],
r8: reg = ["$8"],
r9: reg = ["$9"],
r10: reg = ["$10"],
r11: reg = ["$11"],
r12: reg = ["$12"],
r13: reg = ["$13"],
r14: reg = ["$14"],
r15: reg = ["$15"],
r16: reg = ["$16"],
r17: reg = ["$17"],
r18: reg = ["$18"],
r19: reg = ["$19"],
r20: reg = ["$20"],
r21: reg = ["$21"],
r22: reg = ["$22"],
r23: reg = ["$23"],
r24: reg = ["$24"],
r25: reg = ["$25"],
f0: freg = ["$f0"],
f1: freg = ["$f1"],
f2: freg = ["$f2"],
@ -102,21 +102,21 @@ def_regs! {
f29: freg = ["$f29"],
f30: freg = ["$f30"],
f31: freg = ["$f31"],
#error = ["$0", "$zero"] =>
#error = ["$0"] =>
"constant zero cannot be used as an operand for inline asm",
#error = ["$1", "$at"] =>
#error = ["$1"] =>
"reserved for assembler (Assembler Temp)",
#error = ["$26", "$k0"] =>
#error = ["$26"] =>
"OS-reserved register cannot be used as an operand for inline asm",
#error = ["$27", "$k1"] =>
#error = ["$27"] =>
"OS-reserved register cannot be used as an operand for inline asm",
#error = ["$28", "$gp"] =>
#error = ["$28"] =>
"the global pointer cannot be used as an operand for inline asm",
#error = ["$29", "$sp"] =>
#error = ["$29"] =>
"the stack pointer cannot be used as an operand for inline asm",
#error = ["$30", "$s8", "$fp"] =>
#error = ["$30"] =>
"the frame pointer cannot be used as an operand for inline asm",
#error = ["$31", "$ra"] =>
#error = ["$31"] =>
"the return address register cannot be used as an operand for inline asm",
}
}

3
src/doc/unstable-book/src/library-features/asm.md
View file

@ -602,7 +602,6 @@ Some registers have multiple names. These are all treated by the compiler as ide
| ARM | `r13` | `sp` |
| ARM | `r14` | `lr` |
| ARM | `r15` | `pc` |
| MIPS32 | `$[2-25]` | Please [see the Wikipedia page][mips-regs] |
| RISC-V | `x0` | `zero` |
| RISC-V | `x1` | `ra` |
| RISC-V | `x2` | `sp` |
@ -623,8 +622,6 @@ Some registers have multiple names. These are all treated by the compiler as ide
| Hexagon | `r30` | `fr` |
| Hexagon | `r31` | `lr` |
[mips-regs]: https://en.wikibooks.org/wiki/MIPS_Assembly/Register_File#Registers
Some registers cannot be used for input or output operands:
| Architecture | Unsupported register | Reason |