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-rw-r--r--src/core/arm/skyeye_common/vfp/vfp_helper.h117
-rw-r--r--src/core/arm/skyeye_common/vfp/vfpdouble.cpp35
-rw-r--r--src/core/arm/skyeye_common/vfp/vfpsingle.cpp30
3 files changed, 98 insertions, 84 deletions
diff --git a/src/core/arm/skyeye_common/vfp/vfp_helper.h b/src/core/arm/skyeye_common/vfp/vfp_helper.h
index 6b3dae280..ccc0212ab 100644
--- a/src/core/arm/skyeye_common/vfp/vfp_helper.h
+++ b/src/core/arm/skyeye_common/vfp/vfp_helper.h
@@ -35,6 +35,7 @@
#include <cstdio>
#include "common/common_types.h"
#include "core/arm/skyeye_common/armdefs.h"
+#include "core/arm/skyeye_common/vfp/asm_vfp.h"
#define do_div(n, base) {n/=base;}
@@ -236,33 +237,6 @@ struct vfp_single {
#define vfp_single_packed_exponent(v) (((v) >> VFP_SINGLE_MANTISSA_BITS) & ((1 << VFP_SINGLE_EXPONENT_BITS) - 1))
#define vfp_single_packed_mantissa(v) ((v) & ((1 << VFP_SINGLE_MANTISSA_BITS) - 1))
-// Unpack a single-precision float. Note that this returns the magnitude
-// of the single-precision float mantissa with the 1. if necessary,
-// aligned to bit 30.
-static inline void vfp_single_unpack(vfp_single* s, s32 val)
-{
- u32 significand;
-
- s->sign = vfp_single_packed_sign(val) >> 16,
- s->exponent = vfp_single_packed_exponent(val);
-
- significand = (u32) val;
- significand = (significand << (32 - VFP_SINGLE_MANTISSA_BITS)) >> 2;
- if (s->exponent && s->exponent != 255)
- significand |= 0x40000000;
- s->significand = significand;
-}
-
-// Re-pack a single-precision float. This assumes that the float is
-// already normalised such that the MSB is bit 30, _not_ bit 31.
-static inline s32 vfp_single_pack(vfp_single* s)
-{
- u32 val = (s->sign << 16) +
- (s->exponent << VFP_SINGLE_MANTISSA_BITS) +
- (s->significand >> VFP_SINGLE_LOW_BITS);
- return (s32)val;
-}
-
enum : u32 {
VFP_NUMBER = (1 << 0),
VFP_ZERO = (1 << 1),
@@ -294,6 +268,39 @@ static inline int vfp_single_type(vfp_single* s)
return type;
}
+// Unpack a single-precision float. Note that this returns the magnitude
+// of the single-precision float mantissa with the 1. if necessary,
+// aligned to bit 30.
+static inline void vfp_single_unpack(vfp_single* s, s32 val, u32* fpscr)
+{
+ s->sign = vfp_single_packed_sign(val) >> 16,
+ s->exponent = vfp_single_packed_exponent(val);
+
+ u32 significand = ((u32)val << (32 - VFP_SINGLE_MANTISSA_BITS)) >> 2;
+ if (s->exponent && s->exponent != 255)
+ significand |= 0x40000000;
+ s->significand = significand;
+
+ // If flush-to-zero mode is enabled, turn the denormal into zero.
+ // On a VFPv2 architecture, the sign of the zero is always positive.
+ if ((*fpscr & FPSCR_FLUSH_TO_ZERO) != 0 && (vfp_single_type(s) & VFP_DENORMAL) != 0) {
+ s->sign = 0;
+ s->exponent = 0;
+ s->significand = 0;
+ *fpscr |= FPSCR_IDC;
+ }
+}
+
+// Re-pack a single-precision float. This assumes that the float is
+// already normalised such that the MSB is bit 30, _not_ bit 31.
+static inline s32 vfp_single_pack(vfp_single* s)
+{
+ u32 val = (s->sign << 16) +
+ (s->exponent << VFP_SINGLE_MANTISSA_BITS) +
+ (s->significand >> VFP_SINGLE_LOW_BITS);
+ return (s32)val;
+}
+
u32 vfp_single_normaliseround(ARMul_State* state, int sd, vfp_single* vs, u32 fpscr, u32 exceptions, const char* func);
@@ -328,24 +335,49 @@ struct vfp_double {
#define vfp_double_packed_exponent(v) (((v) >> VFP_DOUBLE_MANTISSA_BITS) & ((1 << VFP_DOUBLE_EXPONENT_BITS) - 1))
#define vfp_double_packed_mantissa(v) ((v) & ((1ULL << VFP_DOUBLE_MANTISSA_BITS) - 1))
+static inline int vfp_double_type(vfp_double* s)
+{
+ int type = VFP_NUMBER;
+ if (s->exponent == 2047) {
+ if (s->significand == 0)
+ type = VFP_INFINITY;
+ else if (s->significand & VFP_DOUBLE_SIGNIFICAND_QNAN)
+ type = VFP_QNAN;
+ else
+ type = VFP_SNAN;
+ } else if (s->exponent == 0) {
+ if (s->significand == 0)
+ type |= VFP_ZERO;
+ else
+ type |= VFP_DENORMAL;
+ }
+ return type;
+}
+
// Unpack a double-precision float. Note that this returns the magnitude
// of the double-precision float mantissa with the 1. if necessary,
// aligned to bit 62.
-static inline void vfp_double_unpack(vfp_double* s, s64 val)
+static inline void vfp_double_unpack(vfp_double* s, s64 val, u32* fpscr)
{
- u64 significand;
-
s->sign = vfp_double_packed_sign(val) >> 48;
s->exponent = vfp_double_packed_exponent(val);
- significand = (u64) val;
- significand = (significand << (64 - VFP_DOUBLE_MANTISSA_BITS)) >> 2;
+ u64 significand = ((u64)val << (64 - VFP_DOUBLE_MANTISSA_BITS)) >> 2;
if (s->exponent && s->exponent != 2047)
significand |= (1ULL << 62);
s->significand = significand;
+
+ // If flush-to-zero mode is enabled, turn the denormal into zero.
+ // 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) {
+ s->sign = 0;
+ s->exponent = 0;
+ s->significand = 0;
+ *fpscr |= FPSCR_IDC;
+ }
}
-// Re-pack a double-precision float. This assumes that the float is
+// Re-pack a double-precision float. This assumes that the float is
// already normalised such that the MSB is bit 30, _not_ bit 31.
static inline s64 vfp_double_pack(vfp_double* s)
{
@@ -355,25 +387,6 @@ static inline s64 vfp_double_pack(vfp_double* s)
return (s64)val;
}
-static inline int vfp_double_type(vfp_double* s)
-{
- int type = VFP_NUMBER;
- if (s->exponent == 2047) {
- if (s->significand == 0)
- type = VFP_INFINITY;
- else if (s->significand & VFP_DOUBLE_SIGNIFICAND_QNAN)
- type = VFP_QNAN;
- else
- type = VFP_SNAN;
- } else if (s->exponent == 0) {
- if (s->significand == 0)
- type |= VFP_ZERO;
- else
- type |= VFP_DENORMAL;
- }
- return type;
-}
-
u32 vfp_estimate_sqrt_significand(u32 exponent, u32 significand);
// A special flag to tell the normalisation code not to normalise.
diff --git a/src/core/arm/skyeye_common/vfp/vfpdouble.cpp b/src/core/arm/skyeye_common/vfp/vfpdouble.cpp
index d76d37fd4..ab9fec39d 100644
--- a/src/core/arm/skyeye_common/vfp/vfpdouble.cpp
+++ b/src/core/arm/skyeye_common/vfp/vfpdouble.cpp
@@ -291,7 +291,8 @@ static u32 vfp_double_fsqrt(ARMul_State* state, int dd, int unused, int dm, u32
vfp_double vdm, vdd, *vdp;
int ret, tm;
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
+
tm = vfp_double_type(&vdm);
if (tm & (VFP_NAN|VFP_INFINITY)) {
vdp = &vdd;
@@ -473,7 +474,7 @@ static u32 vfp_double_fcvts(ARMul_State* state, int sd, int unused, int dm, u32
u32 exceptions = 0;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
tm = vfp_double_type(&vdm);
@@ -543,7 +544,7 @@ static u32 vfp_double_ftoui(ARMul_State* state, int sd, int unused, int dm, u32
int tm;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
/*
* Do we have a denormalised number?
@@ -624,7 +625,7 @@ static u32 vfp_double_ftosi(ARMul_State* state, int sd, int unused, int dm, u32
int tm;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
vfp_double_dump("VDM", &vdm);
/*
@@ -896,11 +897,11 @@ vfp_double_multiply_accumulate(ARMul_State* state, int dd, int dn, int dm, u32 f
struct vfp_double vdd, vdp, vdn, vdm;
u32 exceptions;
- vfp_double_unpack(&vdn, vfp_get_double(state, dn));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr);
if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm);
@@ -908,7 +909,7 @@ vfp_double_multiply_accumulate(ARMul_State* state, int dd, int dn, int dm, u32 f
if (negate & NEG_MULTIPLY)
vdp.sign = vfp_sign_negate(vdp.sign);
- vfp_double_unpack(&vdn, vfp_get_double(state, dd));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dd), &fpscr);
if (vdn.exponent == 0 && vdn.significand != 0)
vfp_double_normalise_denormal(&vdn);
@@ -969,11 +970,11 @@ static u32 vfp_double_fmul(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
u32 exceptions;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdn, vfp_get_double(state, dn));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr);
if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm);
@@ -990,11 +991,11 @@ static u32 vfp_double_fnmul(ARMul_State* state, int dd, int dn, int dm, u32 fpsc
u32 exceptions;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdn, vfp_get_double(state, dn));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr);
if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm);
@@ -1013,11 +1014,11 @@ static u32 vfp_double_fadd(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
u32 exceptions;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdn, vfp_get_double(state, dn));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr);
if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm);
@@ -1035,11 +1036,11 @@ static u32 vfp_double_fsub(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
u32 exceptions;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdn, vfp_get_double(state, dn));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr);
if (vdn.exponent == 0 && vdn.significand)
vfp_double_normalise_denormal(&vdn);
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
if (vdm.exponent == 0 && vdm.significand)
vfp_double_normalise_denormal(&vdm);
@@ -1063,8 +1064,8 @@ static u32 vfp_double_fdiv(ARMul_State* state, int dd, int dn, int dm, u32 fpscr
int tm, tn;
LOG_TRACE(Core_ARM11, "In %s\n", __FUNCTION__);
- vfp_double_unpack(&vdn, vfp_get_double(state, dn));
- vfp_double_unpack(&vdm, vfp_get_double(state, dm));
+ vfp_double_unpack(&vdn, vfp_get_double(state, dn), &fpscr);
+ vfp_double_unpack(&vdm, vfp_get_double(state, dm), &fpscr);
vdd.sign = vdn.sign ^ vdm.sign;
diff --git a/src/core/arm/skyeye_common/vfp/vfpsingle.cpp b/src/core/arm/skyeye_common/vfp/vfpsingle.cpp
index a78bdc430..4dfe0254d 100644
--- a/src/core/arm/skyeye_common/vfp/vfpsingle.cpp
+++ b/src/core/arm/skyeye_common/vfp/vfpsingle.cpp
@@ -330,7 +330,7 @@ static u32 vfp_single_fsqrt(ARMul_State* state, int sd, int unused, s32 m, u32 f
struct vfp_single vsm, vsd, *vsp;
int ret, tm;
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
tm = vfp_single_type(&vsm);
if (tm & (VFP_NAN|VFP_INFINITY)) {
vsp = &vsd;
@@ -498,7 +498,7 @@ static u32 vfp_single_fcvtd(ARMul_State* state, int dd, int unused, s32 m, u32 f
int tm;
u32 exceptions = 0;
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
tm = vfp_single_type(&vsm);
@@ -563,7 +563,7 @@ static u32 vfp_single_ftoui(ARMul_State* state, int sd, int unused, s32 m, u32 f
int rmode = fpscr & FPSCR_RMODE_MASK;
int tm;
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
vfp_single_dump("VSM", &vsm);
/*
@@ -643,7 +643,7 @@ static u32 vfp_single_ftosi(ARMul_State* state, int sd, int unused, s32 m, u32 f
int rmode = fpscr & FPSCR_RMODE_MASK;
int tm;
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
vfp_single_dump("VSM", &vsm);
/*
@@ -925,11 +925,11 @@ vfp_single_multiply_accumulate(ARMul_State* state, int sd, int sn, s32 m, u32 fp
v = vfp_get_float(state, sn);
LOG_DEBUG(Core_ARM11, "s%u = %08x", sn, v);
- vfp_single_unpack(&vsn, v);
+ vfp_single_unpack(&vsn, v, &fpscr);
if (vsn.exponent == 0 && vsn.significand)
vfp_single_normalise_denormal(&vsn);
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
if (vsm.exponent == 0 && vsm.significand)
vfp_single_normalise_denormal(&vsm);
@@ -940,7 +940,7 @@ vfp_single_multiply_accumulate(ARMul_State* state, int sd, int sn, s32 m, u32 fp
v = vfp_get_float(state, sd);
LOG_DEBUG(Core_ARM11, "s%u = %08x", sd, v);
- vfp_single_unpack(&vsn, v);
+ vfp_single_unpack(&vsn, v, &fpscr);
if (vsn.exponent == 0 && vsn.significand != 0)
vfp_single_normalise_denormal(&vsn);
@@ -1004,11 +1004,11 @@ static u32 vfp_single_fmul(ARMul_State* state, int sd, int sn, s32 m, u32 fpscr)
LOG_DEBUG(Core_ARM11, "s%u = %08x", sn, n);
- vfp_single_unpack(&vsn, n);
+ vfp_single_unpack(&vsn, n, &fpscr);
if (vsn.exponent == 0 && vsn.significand)
vfp_single_normalise_denormal(&vsn);
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
if (vsm.exponent == 0 && vsm.significand)
vfp_single_normalise_denormal(&vsm);
@@ -1027,11 +1027,11 @@ static u32 vfp_single_fnmul(ARMul_State* state, int sd, int sn, s32 m, u32 fpscr
LOG_DEBUG(Core_ARM11, "s%u = %08x", sn, n);
- vfp_single_unpack(&vsn, n);
+ vfp_single_unpack(&vsn, n, &fpscr);
if (vsn.exponent == 0 && vsn.significand)
vfp_single_normalise_denormal(&vsn);
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
if (vsm.exponent == 0 && vsm.significand)
vfp_single_normalise_denormal(&vsm);
@@ -1054,11 +1054,11 @@ static u32 vfp_single_fadd(ARMul_State* state, int sd, int sn, s32 m, u32 fpscr)
/*
* Unpack and normalise denormals.
*/
- vfp_single_unpack(&vsn, n);
+ vfp_single_unpack(&vsn, n, &fpscr);
if (vsn.exponent == 0 && vsn.significand)
vfp_single_normalise_denormal(&vsn);
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsm, m, &fpscr);
if (vsm.exponent == 0 && vsm.significand)
vfp_single_normalise_denormal(&vsm);
@@ -1094,8 +1094,8 @@ static u32 vfp_single_fdiv(ARMul_State* state, int sd, int sn, s32 m, u32 fpscr)
LOG_DEBUG(Core_ARM11, "s%u = %08x", sn, n);
- vfp_single_unpack(&vsn, n);
- vfp_single_unpack(&vsm, m);
+ vfp_single_unpack(&vsn, n, &fpscr);
+ vfp_single_unpack(&vsm, m, &fpscr);
vsd.sign = vsn.sign ^ vsm.sign;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 09:09:13 +0100