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@@ -415,9 +415,6 @@
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|.macro sseconst_1, reg, tmp // Synthesize 1.0.
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| sseconst_hi reg, tmp, 3ff00000
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|.endmacro
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-|.macro sseconst_m1, reg, tmp // Synthesize -1.0.
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-| sseconst_hi reg, tmp, bff00000
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-|.endmacro
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|.macro sseconst_2p52, reg, tmp // Synthesize 2^52.
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| sseconst_hi reg, tmp, 43300000
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|.endmacro
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@@ -3114,15 +3111,17 @@ static void build_subroutines(BuildCtx *ctx)
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| addsd xmm1, xmm3 // (|x| + 2^52) - 2^52
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| subsd xmm1, xmm3
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| orpd xmm1, xmm2 // Merge sign bit back in.
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+ | sseconst_1 xmm3, RDa
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| .if mode == 1 // ceil(x)?
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- | sseconst_m1 xmm2, RDa // Must subtract -1 to preserve -0.
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| cmpsd xmm0, xmm1, 6 // x > result?
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+ | andpd xmm0, xmm3
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+ | addsd xmm1, xmm0 // If yes, add 1.
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+ | orpd xmm1, xmm2 // Merge sign bit back in (again).
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| .else // floor(x)?
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- | sseconst_1 xmm2, RDa
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| cmpsd xmm0, xmm1, 1 // x < result?
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+ | andpd xmm0, xmm3
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+ | subsd xmm1, xmm0 // If yes, subtract 1.
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| .endif
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- | andpd xmm0, xmm2
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- | subsd xmm1, xmm0 // If yes, subtract +-1.
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|.endif
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| movaps xmm0, xmm1
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Mike Pall