Merge pull request #549 from lioncash/tossed
Throw more unused/unnecessary VFP code out
This commit is contained in:
commit
7dfdbe22de
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@ -381,8 +381,6 @@ static inline int vfp_double_type(vfp_double* s)
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return type;
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}
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u32 vfp_double_normaliseround(ARMul_State* state, int dd, vfp_double* vd, u32 fpscr, u32 exceptions, const char* func);
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u32 vfp_estimate_sqrt_significand(u32 exponent, u32 significand);
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// A special flag to tell the normalisation code not to normalise.
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@ -441,7 +439,6 @@ static inline u32 fls(ARMword x)
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}
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u32 vfp_double_normaliseroundintern(ARMul_State* state, vfp_double* vd, u32 fpscr, u32 exceptions, const char* func);
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u32 vfp_double_multiply(vfp_double* vdd, vfp_double* vdn, vfp_double* vdm, u32 fpscr);
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u32 vfp_double_add(vfp_double* vdd, vfp_double* vdn, vfp_double *vdm, u32 fpscr);
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u32 vfp_double_fcvtsinterncutting(ARMul_State* state, int sd, vfp_double* dm, u32 fpscr);
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u32 vfp_double_normaliseround(ARMul_State* state, int dd, vfp_double* vd, u32 fpscr, u32 exceptions, const char* func);
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@ -83,134 +83,6 @@ static void vfp_double_normalise_denormal(struct vfp_double *vd)
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vfp_double_dump("normalise_denormal: out", vd);
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}
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u32 vfp_double_normaliseroundintern(ARMul_State* state, struct vfp_double *vd, u32 fpscr, u32 exceptions, const char *func)
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{
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u64 significand, incr;
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int exponent, shift, underflow;
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u32 rmode;
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vfp_double_dump("pack: in", vd);
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/*
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* Infinities and NaNs are a special case.
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*/
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if (vd->exponent == 2047 && (vd->significand == 0 || exceptions))
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goto pack;
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/*
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* Special-case zero.
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*/
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if (vd->significand == 0) {
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vd->exponent = 0;
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goto pack;
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}
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exponent = vd->exponent;
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significand = vd->significand;
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shift = 32 - fls((ARMword)(significand >> 32));
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if (shift == 32)
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shift = 64 - fls((ARMword)significand);
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if (shift) {
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exponent -= shift;
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significand <<= shift;
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}
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#if 1
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vd->exponent = exponent;
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vd->significand = significand;
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vfp_double_dump("pack: normalised", vd);
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#endif
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/*
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* Tiny number?
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*/
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underflow = exponent < 0;
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if (underflow) {
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significand = vfp_shiftright64jamming(significand, -exponent);
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exponent = 0;
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#if 1
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vd->exponent = exponent;
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vd->significand = significand;
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vfp_double_dump("pack: tiny number", 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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}
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/*
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* Select rounding increment.
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*/
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incr = 0;
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rmode = fpscr & FPSCR_RMODE_MASK;
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if (rmode == FPSCR_ROUND_NEAREST) {
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incr = 1ULL << VFP_DOUBLE_LOW_BITS;
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if ((significand & (1ULL << (VFP_DOUBLE_LOW_BITS + 1))) == 0)
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incr -= 1;
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}
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else if (rmode == FPSCR_ROUND_TOZERO) {
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incr = 0;
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}
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else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vd->sign != 0))
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incr = (1ULL << (VFP_DOUBLE_LOW_BITS + 1)) - 1;
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LOG_TRACE(Core_ARM11, "VFP: rounding increment = 0x%08llx\n", incr);
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/*
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* Is our rounding going to overflow?
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*/
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if ((significand + incr) < significand) {
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exponent += 1;
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significand = (significand >> 1) | (significand & 1);
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incr >>= 1;
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#if 1
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vd->exponent = exponent;
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vd->significand = significand;
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vfp_double_dump("pack: overflow", vd);
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#endif
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}
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/*
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* If any of the low bits (which will be shifted out of the
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* number) are non-zero, the result is inexact.
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*/
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if (significand & ((1 << (VFP_DOUBLE_LOW_BITS + 1)) - 1))
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exceptions |= FPSCR_IXC;
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/*
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* Do our rounding.
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*/
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significand += incr;
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/*
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* Infinity?
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*/
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if (exponent >= 2046) {
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exceptions |= FPSCR_OFC | FPSCR_IXC;
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if (incr == 0) {
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vd->exponent = 2045;
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vd->significand = 0x7fffffffffffffffULL;
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}
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else {
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vd->exponent = 2047; /* infinity */
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vd->significand = 0;
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}
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}
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else {
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if (significand >> (VFP_DOUBLE_LOW_BITS + 1) == 0)
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exponent = 0;
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if (exponent || significand > 0x8000000000000000ULL)
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underflow = 0;
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if (underflow)
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exceptions |= FPSCR_UFC;
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vd->exponent = exponent;
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vd->significand = significand >> 1;
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}
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pack:
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return 0;
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}
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u32 vfp_double_normaliseround(ARMul_State* state, int dd, struct vfp_double *vd, u32 fpscr, u32 exceptions, const char *func)
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{
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u64 significand, incr;
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@ -592,49 +464,6 @@ static u32 vfp_double_fcmpez(ARMul_State* state, int dd, int unused, int dm, u32
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return vfp_compare(state, dd, 1, VFP_REG_ZERO, fpscr);
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}
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u32 vfp_double_fcvtsinterncutting(ARMul_State* state, int sd, struct vfp_double* dm, u32 fpscr) //ichfly for internal use only
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{
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struct vfp_single vsd;
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int tm;
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u32 exceptions = 0;
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LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
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tm = vfp_double_type(dm);
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/*
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* If we have a signalling NaN, signal invalid operation.
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*/
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if (tm == VFP_SNAN)
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exceptions = FPSCR_IOC;
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if (tm & VFP_DENORMAL)
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vfp_double_normalise_denormal(dm);
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vsd.sign = dm->sign;
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vsd.significand = vfp_hi64to32jamming(dm->significand);
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/*
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* If we have an infinity or a NaN, the exponent must be 255
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*/
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if (tm & (VFP_INFINITY | VFP_NAN)) {
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vsd.exponent = 255;
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if (tm == VFP_QNAN)
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vsd.significand |= VFP_SINGLE_SIGNIFICAND_QNAN;
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goto pack_nan;
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}
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else if (tm & VFP_ZERO)
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vsd.exponent = 0;
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else
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vsd.exponent = dm->exponent - (1023 - 127);
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return vfp_single_normaliseround(state, sd, &vsd, fpscr, exceptions, "fcvts");
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pack_nan:
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vfp_put_float(state, vfp_single_pack(&vsd), sd);
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return exceptions;
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}
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static u32 vfp_double_fcvts(ARMul_State* state, int sd, int unused, int dm, u32 fpscr)
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{
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struct vfp_double vdm;
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@ -491,46 +491,6 @@ static u32 vfp_single_fcmpez(ARMul_State* state, int sd, int unused, s32 m, u32
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return vfp_compare(state, sd, 1, 0, fpscr);
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}
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static s64 vfp_single_to_doubleintern(ARMul_State* state, s32 m, u32 fpscr) //ichfly for internal use only
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{
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struct vfp_single vsm;
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struct vfp_double vdd;
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int tm;
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u32 exceptions = 0;
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vfp_single_unpack(&vsm, m);
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tm = vfp_single_type(&vsm);
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/*
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* If we have a signalling NaN, signal invalid operation.
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*/
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if (tm == VFP_SNAN)
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exceptions = FPSCR_IOC;
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if (tm & VFP_DENORMAL)
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vfp_single_normalise_denormal(&vsm);
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vdd.sign = vsm.sign;
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vdd.significand = (u64)vsm.significand << 32;
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/*
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* If we have an infinity or NaN, the exponent must be 2047.
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*/
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if (tm & (VFP_INFINITY | VFP_NAN)) {
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vdd.exponent = 2047;
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if (tm == VFP_QNAN)
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vdd.significand |= VFP_DOUBLE_SIGNIFICAND_QNAN;
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goto pack_nan;
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} else if (tm & VFP_ZERO)
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vdd.exponent = 0;
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else
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vdd.exponent = vsm.exponent + (1023 - 127);
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pack_nan:
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vfp_double_normaliseroundintern(state, &vdd, fpscr, exceptions, "fcvtd");
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return vfp_double_pack(&vdd);
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}
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static u32 vfp_single_fcvtd(ARMul_State* state, int dd, int unused, s32 m, u32 fpscr)
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{
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struct vfp_single vsm;
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