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test/codegen: port arm64 BIC/EON/ORN and masking tests

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And delete them from asm_test.

Change-Id: I24f421b87e8cb4770c887a6dfd58eacd0088947d
Reviewed-on: https://go-review.googlesource.com/106056
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Alberto Donizetti 2018-04-10 11:20:20 +02:00
parent d5ff631e6b
commit 188e2bf897
2 changed files with 29 additions and 43 deletions
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43
src/cmd/compile/internal/gc/asm_test.go
View File

@ -283,49 +283,6 @@ var linuxARMTests = []*asmTest{
}
var linuxARM64Tests = []*asmTest{
{
fn: `
func $(x, y uint32) uint32 {
return x &^ y
}
`,
pos: []string{"\tBIC\t"},
neg: []string{"\tAND\t"},
},
{
fn: `
func $(x, y uint32) uint32 {
return x ^ ^y
}
`,
pos: []string{"\tEON\t"},
neg: []string{"\tXOR\t"},
},
{
fn: `
func $(x, y uint32) uint32 {
return x | ^y
}
`,
pos: []string{"\tORN\t"},
neg: []string{"\tORR\t"},
},
{
fn: `
func f34(a uint64) uint64 {
return a & ((1<<63)-1)
}
`,
pos: []string{"\tAND\t"},
},
{
fn: `
func f35(a uint64) uint64 {
return a & (1<<63)
}
`,
pos: []string{"\tAND\t"},
},
// Load-combining tests.
{
fn: `

29
test/codegen/bits.go
View File

@ -261,3 +261,32 @@ func bitcompl32(a, b uint32) (n uint32) {
return n
}
// Check AND masking on arm64 (Issue #19857)
func and_mask_1(a uint64) uint64 {
// arm64:`AND\t`
return a & ((1 << 63) - 1)
}
func and_mask_2(a uint64) uint64 {
// arm64:`AND\t`
return a & (1 << 63)
}
// Check generation of arm64 BIC/EON/ORN instructions
func op_bic(x, y uint32) uint32 {
// arm64:`BIC\t`,-`AND`
return x &^ y
}
func op_eon(x, y uint32) uint32 {
// arm64:`EON\t`,-`XOR`
return x ^ ^y
}
func op_orn(x, y uint32) uint32 {
// arm64:`ORN\t`,-`ORR`
return x | ^y
}