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popcnt for aarch64.

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This commit is contained in:
losfair 2019-10-18 00:18:15 +08:00
parent a057296618
commit cd0b49e661
1 changed files with 76 additions and 4 deletions
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80
lib/singlepass-backend/src/translator_aarch64.rs
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@ -109,6 +109,10 @@ pub fn get_aarch64_assembler() -> Assembler {
; .alias w_tmp2, w26
; .alias x_tmp3, x25
; .alias w_tmp3, w25
; .alias d_tmp1, d28
; .alias d_tmp2, d27
; .alias v_tmp1, v28
; .alias v_tmp2, v27
);
a
}
@ -1102,10 +1106,78 @@ impl Emitter for Assembler {
emit_clz_variant(self, sz, &src, &dst, true);
}
fn emit_popcnt(&mut self, sz: Size, src: Location, dst: Location) {
dynasm!(
self
; .dword 0 ; .dword 90 // TODO: Implement
);
match sz {
Size::S32 => {
match src {
Location::GPR(src) => dynasm!(
self
; mov w_tmp1, W(map_gpr(src).x())
),
Location::Memory(base, disp) => {
if disp >= 0 {
dynasm!(self ; b >after ; disp: ; .dword disp ; after: ; ldr w_tmp3, <disp ; add x_tmp3, x_tmp3, X(map_gpr(base).x()));
} else {
dynasm!(self ; b >after ; disp: ; .dword -disp ; after: ; ldr w_tmp3, <disp ; sub x_tmp3, X(map_gpr(base).x()), x_tmp3);
}
dynasm!(
self
; ldr w_tmp1, [x_tmp3]
)
}
_ => unreachable!(),
}
match dst {
Location::GPR(dst) => {
dynasm!(
self
; mov v_tmp1.S[0], w_tmp1
; cnt v_tmp1.B16, v_tmp1.B16
; mov W(map_gpr(dst).x()), v_tmp1.S[0]
; add W(map_gpr(dst).x()), W(map_gpr(dst).x()), W(map_gpr(dst).x()), lsr 16
; and W(map_gpr(dst).x()), W(map_gpr(dst).x()), 31
);
}
_ => unreachable!(),
}
}
Size::S64 => {
match src {
Location::GPR(src) => dynasm!(
self
; mov x_tmp1, X(map_gpr(src).x())
),
Location::Memory(base, disp) => {
if disp >= 0 {
dynasm!(self ; b >after ; disp: ; .dword disp ; after: ; ldr w_tmp3, <disp ; add x_tmp3, x_tmp3, X(map_gpr(base).x()));
} else {
dynasm!(self ; b >after ; disp: ; .dword -disp ; after: ; ldr w_tmp3, <disp ; sub x_tmp3, X(map_gpr(base).x()), x_tmp3);
}
dynasm!(
self
; ldr x_tmp1, [x_tmp3]
)
}
_ => unreachable!(),
}
match dst {
Location::GPR(dst) => {
dynasm!(
self
; mov v_tmp1.D[0], x_tmp1
; cnt v_tmp1.B16, v_tmp1.B16
; mov x_tmp1, v_tmp1.D[0]
; mov X(map_gpr(dst).x()), x_tmp1
; add X(map_gpr(dst).x()), X(map_gpr(dst).x()), x_tmp1, lsr 16
; add X(map_gpr(dst).x()), X(map_gpr(dst).x()), x_tmp1, lsr 32
; add X(map_gpr(dst).x()), X(map_gpr(dst).x()), x_tmp1, lsr 48
; and X(map_gpr(dst).x()), X(map_gpr(dst).x()), 63
);
}
_ => unreachable!(),
}
}
_ => unreachable!(),
}
}
fn emit_movzx(&mut self, sz_src: Size, src: Location, _sz_dst: Size, dst: Location) {
match (sz_src, src, dst) {