191bab162b
* Optimize 0.0 floating point constants. Rather than using the existing process of emitting bit patterns and moving them into floating point registers, use the `xorps` instruction to zero out the register. * is_zero predicate function will not accept negative zero. Fixed formatting for encoding recipe and filetests.
20 lines
381 B
Plaintext
20 lines
381 B
Plaintext
; Check that floating-point constants equal to zero are optimized correctly.
|
|
test binemit
|
|
set is_64bit=0
|
|
isa x86
|
|
|
|
function %foo() -> f32 fast {
|
|
ebb0:
|
|
; asm: xorps %xmm0, %xmm0
|
|
[-,%xmm0] v0 = f32const 0.0 ; bin: 0f 57 c0
|
|
return v0
|
|
}
|
|
|
|
function %bar() -> f64 fast {
|
|
ebb0:
|
|
; asm: xorpd %xmm0, %xmm0
|
|
[-,%xmm0] v1 = f64const 0.0 ; bin: 66 0f 57 c0
|
|
return v1
|
|
}
|
|
|