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Fix exception propagation for VFP double precision

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This commit is contained in:
Jannik Vogel 2016-05-16 10:55:00 +02:00
parent 7a7488a0bb
commit 7dde13f875
2 changed files with 39 additions and 34 deletions
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8
src/core/arm/skyeye_common/vfp/vfp_helper.h
View file

@ -357,8 +357,9 @@ inline int vfp_double_type(const vfp_double* s)
// Unpack a double-precision float. Note that this returns the magnitude // Unpack a double-precision float. Note that this returns the magnitude
// of the double-precision float mantissa with the 1. if necessary, // of the double-precision float mantissa with the 1. if necessary,
// aligned to bit 62. // aligned to bit 62.
inline void vfp_double_unpack(vfp_double* s, s64 val, u32* fpscr) inline u32 vfp_double_unpack(vfp_double* s, s64 val, u32 fpscr)
{ {
u32 exceptions = 0;
s->sign = vfp_double_packed_sign(val) >> 48; s->sign = vfp_double_packed_sign(val) >> 48;
s->exponent = vfp_double_packed_exponent(val); s->exponent = vfp_double_packed_exponent(val);
@ -369,12 +370,13 @@ inline void vfp_double_unpack(vfp_double* s, s64 val, u32* fpscr)
// If flush-to-zero mode is enabled, turn the denormal into zero. // If flush-to-zero mode is enabled, turn the denormal into zero.
// On a VFPv2 architecture, the sign of the zero is always positive. // On a VFPv2 architecture, the sign of the zero is always positive.
if ((*fpscr & FPSCR_FLUSH_TO_ZERO) != 0 && (vfp_double_type(s) & VFP_DENORMAL) != 0) { if ((fpscr & FPSCR_FLUSH_TO_ZERO) != 0 && (vfp_double_type(s) & VFP_DENORMAL) != 0) {
s->sign = 0; s->sign = 0;
s->exponent = 0; s->exponent = 0;
s->significand = 0; s->significand = 0;
*fpscr |= FPSCR_IDC; exceptions |= FPSCR_IDC;
} }
return exceptions;
} }
// Re-pack a double-precision float. This assumes that the float is // Re-pack a double-precision float. This assumes that the float is

65
src/core/arm/skyeye_common/vfp/vfpdouble.cpp
View file

@ -291,8 +291,9 @@ static u32 vfp_double_fsqrt(ARMul_State* state, int dd, int unused, int dm, u32
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double vdm, vdd, *vdp; vfp_double vdm, vdd, *vdp;
int ret, tm; int ret, tm;
u32 exceptions = 0;
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
tm = vfp_double_type(&vdm); tm = vfp_double_type(&vdm);
if (tm & (VFP_NAN|VFP_INFINITY)) { if (tm & (VFP_NAN|VFP_INFINITY)) {
@ -369,7 +370,9 @@ sqrt_invalid:
} }
vdd.significand = vfp_shiftright64jamming(vdd.significand, 1); vdd.significand = vfp_shiftright64jamming(vdd.significand, 1);
return vfp_double_normaliseround(state, dd, &vdd, fpscr, 0, "fsqrt"); exceptions |= vfp_double_normaliseround(state, dd, &vdd, fpscr, 0, "fsqrt");
return exceptions;
} }
/* /*
@ -475,7 +478,7 @@ static u32 vfp_double_fcvts(ARMul_State* state, int sd, int unused, int dm, u32
u32 exceptions = 0; u32 exceptions = 0;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
tm = vfp_double_type(&vdm); tm = vfp_double_type(&vdm);
@ -545,7 +548,7 @@ static u32 vfp_double_ftoui(ARMul_State* state, int sd, int unused, int dm, u32
int tm; int tm;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
/* /*
* Do we have a denormalised number? * Do we have a denormalised number?
@ -626,7 +629,7 @@ static u32 vfp_double_ftosi(ARMul_State* state, int sd, int unused, int dm, u32
int tm; int tm;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
vfp_double_dump("VDM", &vdm); vfp_double_dump("VDM", &vdm);
/* /*
@ -892,21 +895,21 @@ static u32
vfp_double_multiply_accumulate(ARMul_State* state, int dd, int dn, int dm, u32 fpscr, u32 negate, const char *func) vfp_double_multiply_accumulate(ARMul_State* state, int dd, int dn, int dm, u32 fpscr, u32 negate, const char *func)
{ {
struct vfp_double vdd, vdp, vdn, vdm; struct vfp_double vdd, vdp, vdn, vdm;
u32 exceptions; u32 exceptions = 0;
vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dn), fpscr);
if (vdn.exponent == 0 && vdn.significand) if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn); vfp_double_normalise_denormal(&vdn);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
if (vdm.exponent == 0 && vdm.significand) if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm); vfp_double_normalise_denormal(&vdm);
exceptions = vfp_double_multiply(&vdp, &vdn, &vdm, fpscr); exceptions |= vfp_double_multiply(&vdp, &vdn, &vdm, fpscr);
if (negate & NEG_MULTIPLY) if (negate & NEG_MULTIPLY)
vdp.sign = vfp_sign_negate(vdp.sign); vdp.sign = vfp_sign_negate(vdp.sign);
vfp_double_unpack(&vdn, vfp_get_double(state, dd), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dd), fpscr);
if (vdn.exponent == 0 && vdn.significand != 0) if (vdn.exponent == 0 && vdn.significand != 0)
vfp_double_normalise_denormal(&vdn); vfp_double_normalise_denormal(&vdn);
@ -964,18 +967,18 @@ static u32 vfp_double_fnmsc(ARMul_State* state, int dd, int dn, int dm, u32 fpsc
static u32 vfp_double_fmul(ARMul_State* state, int dd, int dn, int dm, u32 fpscr) static u32 vfp_double_fmul(ARMul_State* state, int dd, int dn, int dm, u32 fpscr)
{ {
struct vfp_double vdd, vdn, vdm; struct vfp_double vdd, vdn, vdm;
u32 exceptions; u32 exceptions = 0;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dn), fpscr);
if (vdn.exponent == 0 && vdn.significand) if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn); vfp_double_normalise_denormal(&vdn);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
if (vdm.exponent == 0 && vdm.significand) if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm); vfp_double_normalise_denormal(&vdm);
exceptions = vfp_double_multiply(&vdd, &vdn, &vdm, fpscr); exceptions |= vfp_double_multiply(&vdd, &vdn, &vdm, fpscr);
return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fmul"); return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fmul");
} }
@ -985,18 +988,18 @@ static u32 vfp_double_fmul(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
static u32 vfp_double_fnmul(ARMul_State* state, int dd, int dn, int dm, u32 fpscr) static u32 vfp_double_fnmul(ARMul_State* state, int dd, int dn, int dm, u32 fpscr)
{ {
struct vfp_double vdd, vdn, vdm; struct vfp_double vdd, vdn, vdm;
u32 exceptions; u32 exceptions = 0;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dn), fpscr);
if (vdn.exponent == 0 && vdn.significand) if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn); vfp_double_normalise_denormal(&vdn);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
if (vdm.exponent == 0 && vdm.significand) if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm); vfp_double_normalise_denormal(&vdm);
exceptions = vfp_double_multiply(&vdd, &vdn, &vdm, fpscr); exceptions |= vfp_double_multiply(&vdd, &vdn, &vdm, fpscr);
vdd.sign = vfp_sign_negate(vdd.sign); vdd.sign = vfp_sign_negate(vdd.sign);
return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fnmul"); return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fnmul");
@ -1008,18 +1011,18 @@ static u32 vfp_double_fnmul(ARMul_State* state, int dd, int dn, int dm, u32 fpsc
static u32 vfp_double_fadd(ARMul_State* state, int dd, int dn, int dm, u32 fpscr) static u32 vfp_double_fadd(ARMul_State* state, int dd, int dn, int dm, u32 fpscr)
{ {
struct vfp_double vdd, vdn, vdm; struct vfp_double vdd, vdn, vdm;
u32 exceptions; u32 exceptions = 0;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dn), fpscr);
if (vdn.exponent == 0 && vdn.significand) if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn); vfp_double_normalise_denormal(&vdn);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
if (vdm.exponent == 0 && vdm.significand) if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm); vfp_double_normalise_denormal(&vdm);
exceptions = vfp_double_add(&vdd, &vdn, &vdm, fpscr); exceptions |= vfp_double_add(&vdd, &vdn, &vdm, fpscr);
return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fadd"); return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fadd");
} }
@ -1030,14 +1033,14 @@ static u32 vfp_double_fadd(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
static u32 vfp_double_fsub(ARMul_State* state, int dd, int dn, int dm, u32 fpscr) static u32 vfp_double_fsub(ARMul_State* state, int dd, int dn, int dm, u32 fpscr)
{ {
struct vfp_double vdd, vdn, vdm; struct vfp_double vdd, vdn, vdm;
u32 exceptions; u32 exceptions = 0;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dn), fpscr);
if (vdn.exponent == 0 && vdn.significand) if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn); vfp_double_normalise_denormal(&vdn);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
if (vdm.exponent == 0 && vdm.significand) if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm); vfp_double_normalise_denormal(&vdm);
@ -1046,7 +1049,7 @@ static u32 vfp_double_fsub(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
*/ */
vdm.sign = vfp_sign_negate(vdm.sign); vdm.sign = vfp_sign_negate(vdm.sign);
exceptions = vfp_double_add(&vdd, &vdn, &vdm, fpscr); exceptions |= vfp_double_add(&vdd, &vdn, &vdm, fpscr);
return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fsub"); return vfp_double_normaliseround(state, dd, &vdd, fpscr, exceptions, "fsub");
} }
@ -1061,8 +1064,8 @@ static u32 vfp_double_fdiv(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
int tm, tn; int tm, tn;
LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__); LOG_TRACE(Core_ARM11, "In %s", __FUNCTION__);
vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr); exceptions |= vfp_double_unpack(&vdn, vfp_get_double(state, dn), fpscr);
vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr); exceptions |= vfp_double_unpack(&vdm, vfp_get_double(state, dm), fpscr);
vdd.sign = vdn.sign ^ vdm.sign; vdd.sign = vdn.sign ^ vdm.sign;
@ -1134,13 +1137,13 @@ static u32 vfp_double_fdiv(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
return vfp_double_normaliseround(state, dd, &vdd, fpscr, 0, "fdiv"); return vfp_double_normaliseround(state, dd, &vdd, fpscr, 0, "fdiv");
vdn_nan: vdn_nan:
exceptions = vfp_propagate_nan(&vdd, &vdn, &vdm, fpscr); exceptions |= vfp_propagate_nan(&vdd, &vdn, &vdm, fpscr);
pack: pack:
vfp_put_double(state, vfp_double_pack(&vdd), dd); vfp_put_double(state, vfp_double_pack(&vdd), dd);
return exceptions; return exceptions;
vdm_nan: vdm_nan:
exceptions = vfp_propagate_nan(&vdd, &vdm, &vdn, fpscr); exceptions |= vfp_propagate_nan(&vdd, &vdm, &vdn, fpscr);
goto pack; goto pack;
zero: zero:
@ -1149,7 +1152,7 @@ zero:
goto pack; goto pack;
divzero: divzero:
exceptions = FPSCR_DZC; exceptions |= FPSCR_DZC;
infinity: infinity:
vdd.exponent = 2047; vdd.exponent = 2047;
vdd.significand = 0; vdd.significand = 0;