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.
34 lines
734 B
Plaintext
34 lines
734 B
Plaintext
; Check that floating-point constants equal to zero are optimized correctly.
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test binemit
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set is_64bit=1
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isa x86
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function %zero_const_32bit_no_rex() -> f32 fast {
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ebb0:
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; asm: xorps %xmm0, %xmm0
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[-,%xmm0] v0 = f32const 0.0 ; bin: 40 0f 57 c0
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return v0
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}
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function %zero_const_32bit_rex() -> f32 fast {
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ebb0:
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; asm: xorps %xmm8, %xmm8
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[-,%xmm8] v1 = f32const 0.0 ; bin: 45 0f 57 c0
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return v1
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}
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function %zero_const_64bit_no_rex() -> f64 fast {
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ebb0:
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; asm: xorpd %xmm0, %xmm0
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[-,%xmm0] v0 = f64const 0.0 ; bin: 66 40 0f 57 c0
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return v0
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}
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function %zero_const_64bit_rex() -> f64 fast {
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ebb0:
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; asm: xorpd %xmm8, %xmm8
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[-,%xmm8] v1 = f64const 0.0 ; bin: 66 45 0f 57 c0
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return v1
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}
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