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Vector bitcast support (AArch64 & Interpreter) (#4820)

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* Vector bitcast support (AArch64 & Interpreter)

Implemented support for `bitcast` on vector values for AArch64 and the
interpreter.

Also corrected the verifier to ensure that the size, in bits, of the input and
output types match for a `bitcast`, per the docs.

Copyright (c) 2022 Arm Limited

* `I128` same-type bitcast support

Copyright (c) 2022 Arm Limited

* Directly return input for 64-bit GPR<=>GPR bitcast

Copyright (c) 2022 Arm Limited
This commit is contained in:
Damian Heaton
2022-09-21 17:20:28 +01:00
committed by GitHub
parent 05cbd667c7
commit e786bda002
15 changed files with 478 additions and 26 deletions
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50
cranelift/filetests/filetests/runtests/simd-bitcast.clif Normal file
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test interpret
test run
target aarch64
; x86_64 and s390x do not support vector bitcasts.
function %bitcast_if32x2(i32x2) -> f32x2 {
block0(v0: i32x2):
v1 = bitcast.f32x2 v0
return v1
}
; run: %bitcast_if32x2([0 4294967295]) == [0x0.0 -NaN:0x3fffff]
; run: %bitcast_if32x2([-1 127]) == [-NaN:0x3fffff 0x0.0000fep-126]
function %bitcast_fi32x2(f32x2) -> i32x2 {
block0(v0: f32x2):
v1 = bitcast.i32x2 v0
return v1
}
; run: %bitcast_fi32x2([0x0.0 -NaN:0x3fffff]) == [0 4294967295]
; run: %bitcast_fi32x2([-NaN:0x3fffff 0x0.0000fep-126]) == [-1 127]
function %bitcast_if32x4(i32x4) -> f32x4 {
block0(v0: i32x4):
v1 = bitcast.f32x4 v0
return v1
}
; run: %bitcast_if32x4([0 4294967295 -1 127]) == [0x0.0 -NaN:0x3fffff -NaN:0x3fffff 0x0.0000fep-126]
function %bitcast_fi32x4(f32x4) -> i32x4 {
block0(v0: f32x4):
v1 = bitcast.i32x4 v0
return v1
}
; run: %bitcast_fi32x4([0x0.0 -NaN:0x3fffff -NaN:0x3fffff 0x0.0000fep-126]) == [0 4294967295 -1 127]
function %bitcast_if64x2(i64x2) -> f64x2 {
block0(v0: i64x2):
v1 = bitcast.f64x2 v0
return v1
}
; run: %bitcast_if64x2([0 18446744073709551615]) == [0x0.0 -NaN:0x7ffffffffffff]
; run: %bitcast_if64x2([-1 127]) == [-NaN:0x7ffffffffffff 0x0.000000000007fp-1022]
function %bitcast_fi64x2(f64x2) -> i64x2 {
block0(v0: f64x2):
v1 = bitcast.i64x2 v0
return v1
}
; run: %bitcast_fi64x2([0x0.0 -NaN:0x7ffffffffffff]) == [0 18446744073709551615]
; run: %bitcast_fi64x2([-NaN:0x7ffffffffffff 0x0.000000000007fp-1022]) == [-1 127]