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x86-64, load-fp-immediate: dispatch on the value, not destination

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Fixes lp#2158587
This commit is contained in:
Stas Boukarev 2026-06-29 05:35:13 +03:00
parent d8a8a93405
commit b6b1188ebf
2 changed files with 16 additions and 10 deletions
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19
src/compiler/x86-64/float.lisp
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@ -78,16 +78,17 @@
(fp-immediate) (double-reg)
(fp-immediate) (complex-single-reg)
(fp-immediate) (complex-double-reg))
(if (member (tn-value x) '(0f0 0d0 #c(0d0 0d0) #c(0f0 0f0)))
(sc-case y
((single-reg complex-single-reg) (inst xorps y y))
((double-reg complex-double-reg) (inst xorpd y y)))
(let ((x (register-inline-constant (tn-value x))))
(let ((x (tn-value x)))
(if (member x '(0f0 0d0 #c(0d0 0d0) #c(0f0 0f0)))
(sc-case y
(single-reg (inst movss y x))
(double-reg (inst movsd y x))
(complex-single-reg (inst movq y x))
(complex-double-reg (inst movapd y x))))))
((single-reg complex-single-reg) (inst xorps y y))
((double-reg complex-double-reg) (inst xorpd y y)))
(let ((c (register-inline-constant x)))
(etypecase x
(single-float (inst movss y c))
(double-float (inst movsd y c))
(complex-single-float (inst movq y c))
(complex-double-float (inst movupd y c)))))))
(define-move-fun (load-single 2) (vop x y)
((single-stack) (single-reg))

7
tests/float-2.pure.lisp
View file

@ -925,4 +925,9 @@ fractional bits."
()
`(lambda (d)
(- #c(1d0 3d0) (the double-float d)))
((4d0) #C(-3d0 3d0))))
((4d0) #C(-3d0 3d0)))
(checked-compile-and-assert
()
`(lambda (c)
(- 5 (the (complex double-float) c)))
((#c(1d0 3)) #C(4d0 -3))))