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target-tricore: Add instructions of RR opcode format, that have 0x4b as the first opcode

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Add instructions of RR opcode format, that have 0x4b as the first opcode.
Add helper functions:
    * parity: Calculates the parity bits for every byte of a 32 int.
    * bmerge/bsplit: Merges two regs into one bitwise/Splits one reg into two bitwise.
    * unpack: unpack a IEEE 754 single precision floating point number as exponent and mantissa.
    * dvinit_b_13/131: (ISA v1.3/v1.31)Prepare operands for a divide operation,
                       where the quotient result is guaranteed to fit into 8 bit.
    * dvinit_h_13/131: (ISA v1.3/v1.31)Prepare operands for a divide operation,
                       where the quotient result is guaranteed to fit into 16 bit.
OPCM_32_RR_FLOAT -> OPCM_32_RR_DIVIDE.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Bastian Koppelmann 2014-12-02 17:22:27 +00:00
parent f2f1585f60
commit e2bed107c6
4 changed files with 390 additions and 1 deletions
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195
target-tricore/op_helper.c
View file

@ -1033,6 +1033,201 @@ uint32_t helper_sha_h(target_ulong r1, target_ulong r2)
}
}
uint32_t helper_bmerge(target_ulong r1, target_ulong r2)
{
uint32_t i, ret;
ret = 0;
for (i = 0; i < 16; i++) {
ret |= (r1 & 1) << (2 * i + 1);
ret |= (r2 & 1) << (2 * i);
r1 = r1 >> 1;
r2 = r2 >> 1;
}
return ret;
}
uint64_t helper_bsplit(uint32_t r1)
{
int32_t i;
uint64_t ret;
ret = 0;
for (i = 0; i < 32; i = i + 2) {
/* even */
ret |= (r1 & 1) << (i/2);
r1 = r1 >> 1;
/* odd */
ret |= (uint64_t)(r1 & 1) << (i/2 + 32);
r1 = r1 >> 1;
}
return ret;
}
uint32_t helper_parity(target_ulong r1)
{
uint32_t ret;
uint32_t nOnes, i;
ret = 0;
nOnes = 0;
for (i = 0; i < 8; i++) {
ret ^= (r1 & 1);
r1 = r1 >> 1;
}
/* second byte */
nOnes = 0;
for (i = 0; i < 8; i++) {
nOnes ^= (r1 & 1);
r1 = r1 >> 1;
}
ret |= nOnes << 8;
/* third byte */
nOnes = 0;
for (i = 0; i < 8; i++) {
nOnes ^= (r1 & 1);
r1 = r1 >> 1;
}
ret |= nOnes << 16;
/* fourth byte */
nOnes = 0;
for (i = 0; i < 8; i++) {
nOnes ^= (r1 & 1);
r1 = r1 >> 1;
}
ret |= nOnes << 24;
return ret;
}
uint64_t helper_unpack(target_ulong arg1)
{
int32_t fp_exp = extract32(arg1, 23, 8);
int32_t fp_frac = extract32(arg1, 0, 23);
uint64_t ret;
int32_t int_exp, int_mant;
if (fp_exp == 255) {
int_exp = 255;
int_mant = (fp_frac << 7);
} else if ((fp_exp == 0) && (fp_frac == 0)) {
int_exp = -127;
int_mant = 0;
} else if ((fp_exp == 0) && (fp_frac != 0)) {
int_exp = -126;
int_mant = (fp_frac << 7);
} else {
int_exp = fp_exp - 127;
int_mant = (fp_frac << 7);
int_mant |= (1 << 30);
}
ret = int_exp;
ret = ret << 32;
ret |= int_mant;
return ret;
}
uint64_t helper_dvinit_b_13(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
{
uint64_t ret;
int32_t abs_sig_dividend, abs_base_dividend, abs_divisor;
int32_t quotient_sign;
ret = sextract32(r1, 0, 32);
ret = ret << 24;
quotient_sign = 0;
if (!((r1 & 0x80000000) == (r2 & 0x80000000))) {
ret |= 0xffffff;
quotient_sign = 1;
}
abs_sig_dividend = abs(r1) >> 7;
abs_base_dividend = abs(r1) & 0x7f;
abs_divisor = abs(r1);
/* calc overflow */
env->PSW_USB_V = 0;
if ((quotient_sign) && (abs_divisor)) {
env->PSW_USB_V = (((abs_sig_dividend == abs_divisor) &&
(abs_base_dividend >= abs_divisor)) ||
(abs_sig_dividend > abs_divisor));
} else {
env->PSW_USB_V = (abs_sig_dividend >= abs_divisor);
}
env->PSW_USB_V = env->PSW_USB_V << 31;
env->PSW_USB_SV |= env->PSW_USB_V;
env->PSW_USB_AV = 0;
return ret;
}
uint64_t helper_dvinit_b_131(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
{
uint64_t ret = sextract32(r1, 0, 32);
ret = ret << 24;
if (!((r1 & 0x80000000) == (r2 & 0x80000000))) {
ret |= 0xffffff;
}
/* calc overflow */
env->PSW_USB_V = ((r2 == 0) || ((r2 == 0xffffffff) && (r1 == 0xffffff80)));
env->PSW_USB_V = env->PSW_USB_V << 31;
env->PSW_USB_SV |= env->PSW_USB_V;
env->PSW_USB_AV = 0;
return ret;
}
uint64_t helper_dvinit_h_13(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
{
uint64_t ret;
int32_t abs_sig_dividend, abs_base_dividend, abs_divisor;
int32_t quotient_sign;
ret = sextract32(r1, 0, 32);
ret = ret << 16;
quotient_sign = 0;
if (!((r1 & 0x80000000) == (r2 & 0x80000000))) {
ret |= 0xffff;
quotient_sign = 1;
}
abs_sig_dividend = abs(r1) >> 7;
abs_base_dividend = abs(r1) & 0x7f;
abs_divisor = abs(r1);
/* calc overflow */
env->PSW_USB_V = 0;
if ((quotient_sign) && (abs_divisor)) {
env->PSW_USB_V = (((abs_sig_dividend == abs_divisor) &&
(abs_base_dividend >= abs_divisor)) ||
(abs_sig_dividend > abs_divisor));
} else {
env->PSW_USB_V = (abs_sig_dividend >= abs_divisor);
}
env->PSW_USB_V = env->PSW_USB_V << 31;
env->PSW_USB_SV |= env->PSW_USB_V;
env->PSW_USB_AV = 0;
return ret;
}
uint64_t helper_dvinit_h_131(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
{
uint64_t ret = sextract32(r1, 0, 32);
ret = ret << 16;
if (!((r1 & 0x80000000) == (r2 & 0x80000000))) {
ret |= 0xffff;
}
/* calc overflow */
env->PSW_USB_V = ((r2 == 0) || ((r2 == 0xffffffff) && (r1 == 0xffff8000)));
env->PSW_USB_V = env->PSW_USB_V << 31;
env->PSW_USB_SV |= env->PSW_USB_V;
env->PSW_USB_AV = 0;
return ret;
}
/* context save area (CSA) related helpers */
static int cdc_increment(target_ulong *psw)