bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Add clobber-only register classes for asm!

Browse source 
These are needed to properly express a function call ABI using a clobber
list, even though we don't support passing actual values into/out of
these registers.
This commit is contained in:
Amanieu d'Antras 2021-06-17 21:00:52 +01:00
parent 1e13a9bb33
commit e1c3f5e017
11 changed files with 241 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

26
compiler/rustc_target/src/asm/x86.rs
View file

@ -12,6 +12,8 @@ def_reg_class! {
ymm_reg,
zmm_reg,
kreg,
mmx_reg,
x87_reg,
}
}
@ -35,6 +37,7 @@ impl X86InlineAsmRegClass {
Self::reg_byte => &[],
Self::xmm_reg | Self::ymm_reg | Self::zmm_reg => &['x', 'y', 'z'],
Self::kreg => &[],
Self::mmx_reg | Self::x87_reg => &[],
}
}
@ -73,6 +76,7 @@ impl X86InlineAsmRegClass {
_ => Some(('x', "xmm0")),
},
Self::kreg => None,
Self::mmx_reg | Self::x87_reg => None,
}
}
@ -90,6 +94,7 @@ impl X86InlineAsmRegClass {
Self::ymm_reg => Some(('y', "ymm0")),
Self::zmm_reg => Some(('z', "zmm0")),
Self::kreg => None,
Self::mmx_reg | Self::x87_reg => None,
}
}
@ -125,6 +130,7 @@ impl X86InlineAsmRegClass {
"avx512f": I8, I16;
"avx512bw": I32, I64;
},
Self::mmx_reg | Self::x87_reg => &[],
}
}
}
@ -285,16 +291,28 @@ def_regs! {
k5: kreg = ["k5"],
k6: kreg = ["k6"],
k7: kreg = ["k7"],
mm0: mmx_reg = ["mm0"],
mm1: mmx_reg = ["mm1"],
mm2: mmx_reg = ["mm2"],
mm3: mmx_reg = ["mm3"],
mm4: mmx_reg = ["mm4"],
mm5: mmx_reg = ["mm5"],
mm6: mmx_reg = ["mm6"],
mm7: mmx_reg = ["mm7"],
st0: x87_reg = ["st(0)", "st"],
st1: x87_reg = ["st(1)"],
st2: x87_reg = ["st(2)"],
st3: x87_reg = ["st(3)"],
st4: x87_reg = ["st(4)"],
st5: x87_reg = ["st(5)"],
st6: x87_reg = ["st(6)"],
st7: x87_reg = ["st(7)"],
#error = ["bp", "bpl", "ebp", "rbp"] =>
"the frame pointer cannot be used as an operand for inline asm",
#error = ["sp", "spl", "esp", "rsp"] =>
"the stack pointer cannot be used as an operand for inline asm",
#error = ["ip", "eip", "rip"] =>
"the instruction pointer cannot be used as an operand for inline asm",
#error = ["st", "st(0)", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)"] =>
"x87 registers are not currently supported as operands for inline asm",
#error = ["mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7"] =>
"MMX registers are not currently supported as operands for inline asm",
#error = ["k0"] =>
"the k0 AVX mask register cannot be used as an operand for inline asm",
}