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Fix ftoi behaviour

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This commit is contained in:
Jannik Vogel 2016-05-15 16:33:36 +02:00
parent 6fe0cb671d
commit 501d0bc5ed
2 changed files with 53 additions and 22 deletions
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35
src/core/arm/skyeye_common/vfp/vfpdouble.cpp
View file

@ -560,7 +560,7 @@ static u32 vfp_double_ftoui(ARMul_State* state, int sd, int unused, int dm, u32
if (vdm.exponent >= 1023 + 32) { if (vdm.exponent >= 1023 + 32) {
d = vdm.sign ? 0 : 0xffffffff; d = vdm.sign ? 0 : 0xffffffff;
exceptions = FPSCR_IOC; exceptions = FPSCR_IOC;
} else if (vdm.exponent >= 1023 - 1) { } else if (vdm.exponent >= 1023) {
int shift = 1023 + 63 - vdm.exponent; int shift = 1023 + 63 - vdm.exponent;
u64 rem, incr = 0; u64 rem, incr = 0;
@ -595,12 +595,20 @@ static u32 vfp_double_ftoui(ARMul_State* state, int sd, int unused, int dm, u32
} else { } else {
d = 0; d = 0;
if (vdm.exponent | vdm.significand) { if (vdm.exponent | vdm.significand) {
if (rmode == FPSCR_ROUND_NEAREST) {
if (vdm.exponent >= 1022) {
d = vdm.sign ? 0 : 1;
exceptions |= vdm.sign ? FPSCR_IOC : FPSCR_IXC;
} else {
exceptions |= FPSCR_IXC; exceptions |= FPSCR_IXC;
if (rmode == FPSCR_ROUND_PLUSINF && vdm.sign == 0) }
} else if (rmode == FPSCR_ROUND_PLUSINF && vdm.sign == 0) {
d = 1; d = 1;
else if (rmode == FPSCR_ROUND_MINUSINF && vdm.sign) { exceptions |= FPSCR_IXC;
d = 0; } else if (rmode == FPSCR_ROUND_MINUSINF) {
exceptions |= FPSCR_IOC; exceptions |= vdm.sign ? FPSCR_IOC : FPSCR_IXC;
} else {
exceptions |= FPSCR_IXC;
} }
} }
} }
@ -639,12 +647,12 @@ static u32 vfp_double_ftosi(ARMul_State* state, int sd, int unused, int dm, u32
if (tm & VFP_NAN) { if (tm & VFP_NAN) {
d = 0; d = 0;
exceptions |= FPSCR_IOC; exceptions |= FPSCR_IOC;
} else if (vdm.exponent >= 1023 + 32) { } else if (vdm.exponent >= 1023 + 31) {
d = 0x7fffffff; d = 0x7fffffff;
if (vdm.sign) if (vdm.sign)
d = ~d; d = ~d;
exceptions |= FPSCR_IOC; exceptions |= FPSCR_IOC;
} else if (vdm.exponent >= 1023 - 1) { } else if (vdm.exponent >= 1023) {
int shift = 1023 + 63 - vdm.exponent; /* 58 */ int shift = 1023 + 63 - vdm.exponent; /* 58 */
u64 rem, incr = 0; u64 rem, incr = 0;
@ -675,10 +683,17 @@ static u32 vfp_double_ftosi(ARMul_State* state, int sd, int unused, int dm, u32
d = 0; d = 0;
if (vdm.exponent | vdm.significand) { if (vdm.exponent | vdm.significand) {
exceptions |= FPSCR_IXC; exceptions |= FPSCR_IXC;
if (rmode == FPSCR_ROUND_PLUSINF && vdm.sign == 0) if (rmode == FPSCR_ROUND_NEAREST) {
if (vdm.exponent >= 1022) {
d = vdm.sign ? 0xffffffff : 1;
} else {
d = 0;
}
} else if (rmode == FPSCR_ROUND_PLUSINF && vdm.sign == 0) {
d = 1; d = 1;
else if (rmode == FPSCR_ROUND_MINUSINF && vdm.sign) } else if (rmode == FPSCR_ROUND_MINUSINF && vdm.sign) {
d = -1; d = 0xffffffff;
}
} }
} }

36
src/core/arm/skyeye_common/vfp/vfpsingle.cpp
View file

@ -592,7 +592,11 @@ static u32 vfp_single_ftoui(ARMul_State* state, int sd, int unused, s32 m, u32 f
* 2^0 <= m < 2^32-2^8 * 2^0 <= m < 2^32-2^8
*/ */
d = (vsm.significand << 1) >> shift; d = (vsm.significand << 1) >> shift;
rem = vsm.significand << (33 - shift); if (shift > 0) {
rem = (vsm.significand << 1) << (32 - shift);
} else {
rem = 0;
}
if (rmode == FPSCR_ROUND_NEAREST) { if (rmode == FPSCR_ROUND_NEAREST) {
incr = 0x80000000; incr = 0x80000000;
@ -619,12 +623,20 @@ static u32 vfp_single_ftoui(ARMul_State* state, int sd, int unused, s32 m, u32 f
} else { } else {
d = 0; d = 0;
if (vsm.exponent | vsm.significand) { if (vsm.exponent | vsm.significand) {
if (rmode == FPSCR_ROUND_NEAREST) {
if (vsm.exponent >= 126) {
d = vsm.sign ? 0 : 1;
exceptions |= vsm.sign ? FPSCR_IOC : FPSCR_IXC;
} else {
exceptions |= FPSCR_IXC; exceptions |= FPSCR_IXC;
if (rmode == FPSCR_ROUND_PLUSINF && vsm.sign == 0) }
} else if (rmode == FPSCR_ROUND_PLUSINF && vsm.sign == 0) {
d = 1; d = 1;
else if (rmode == FPSCR_ROUND_MINUSINF && vsm.sign) { exceptions |= FPSCR_IXC;
d = 0; } else if (rmode == FPSCR_ROUND_MINUSINF) {
exceptions |= FPSCR_IOC; exceptions |= vsm.sign ? FPSCR_IOC : FPSCR_IXC;
} else {
exceptions |= FPSCR_IXC;
} }
} }
} }
@ -661,7 +673,7 @@ static u32 vfp_single_ftosi(ARMul_State* state, int sd, int unused, s32 m, u32 f
if (tm & VFP_NAN) { if (tm & VFP_NAN) {
d = 0; d = 0;
exceptions |= FPSCR_IOC; exceptions |= FPSCR_IOC;
} else if (vsm.exponent >= 127 + 32) { } else if (vsm.exponent >= 127 + 31) {
/* /*
* m >= 2^31-2^7: invalid * m >= 2^31-2^7: invalid
*/ */
@ -675,7 +687,7 @@ static u32 vfp_single_ftosi(ARMul_State* state, int sd, int unused, s32 m, u32 f
/* 2^0 <= m <= 2^31-2^7 */ /* 2^0 <= m <= 2^31-2^7 */
d = (vsm.significand << 1) >> shift; d = (vsm.significand << 1) >> shift;
rem = vsm.significand << (33 - shift); rem = (vsm.significand << 1) << (32 - shift);
if (rmode == FPSCR_ROUND_NEAREST) { if (rmode == FPSCR_ROUND_NEAREST) {
incr = 0x80000000; incr = 0x80000000;
@ -701,10 +713,14 @@ static u32 vfp_single_ftosi(ARMul_State* state, int sd, int unused, s32 m, u32 f
d = 0; d = 0;
if (vsm.exponent | vsm.significand) { if (vsm.exponent | vsm.significand) {
exceptions |= FPSCR_IXC; exceptions |= FPSCR_IXC;
if (rmode == FPSCR_ROUND_PLUSINF && vsm.sign == 0) if (rmode == FPSCR_ROUND_NEAREST) {
if (vsm.exponent >= 126)
d = vsm.sign ? 0xffffffff : 1;
} else if (rmode == FPSCR_ROUND_PLUSINF && vsm.sign == 0) {
d = 1; d = 1;
else if (rmode == FPSCR_ROUND_MINUSINF && vsm.sign) } else if (rmode == FPSCR_ROUND_MINUSINF && vsm.sign) {
d = -1; d = 0xffffffff;
}
} }
} }