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Dyncom/VFP: Convert denormal outputs into 0 when the FTZ flag is enabled.
Inputs are still not flushed to 0 if they are denormals.
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@ -135,6 +135,21 @@ u32 vfp_double_normaliseround(ARMul_State* state, int dd, struct vfp_double* vd,
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#endif
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if (!(significand & ((1ULL << (VFP_DOUBLE_LOW_BITS + 1)) - 1)))
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underflow = 0;
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int type = vfp_double_type(vd);
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if ((type & VFP_DENORMAL) && (fpscr & FPSCR_FLUSH_TO_ZERO)) {
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// Flush denormal to positive 0
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exponent = 0;
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significand = 0;
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vd->sign = 0;
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vd->exponent = exponent;
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vd->significand = significand;
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underflow = 0;
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exceptions |= FPSCR_UFC;
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}
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}
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/*
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@ -138,6 +138,21 @@ u32 vfp_single_normaliseround(ARMul_State* state, int sd, struct vfp_single* vs,
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#endif
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if (!(significand & ((1 << (VFP_SINGLE_LOW_BITS + 1)) - 1)))
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underflow = 0;
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int type = vfp_single_type(vs);
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if ((type & VFP_DENORMAL) && (fpscr & FPSCR_FLUSH_TO_ZERO)) {
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// Flush denormal to positive 0
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exponent = 0;
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significand = 0;
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vs->sign = 0;
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vs->exponent = exponent;
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vs->significand = significand;
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underflow = 0;
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exceptions |= FPSCR_UFC;
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}
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}
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/*
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