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Fix botched implementations of vec4 based shift.

This commit is contained in:
Stephen Williams 2014-01-13 17:46:14 -08:00
parent 079065ea73
commit aaa054a932
1 changed files with 12 additions and 9 deletions
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21
vvp/vthread.cc
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@ -5512,10 +5512,10 @@ bool of_SHIFTL(vthread_t thr, vvp_code_t cp)
val = vvp_vector4_t(wid, BIT4_0);
} else if (shift > 0) {
val.mov(shift, 0, wid-shift);
vvp_vector4_t blk = val.subvalue(0, wid-shift);
vvp_vector4_t tmp (shift, BIT4_0);
val.set_vec(0, tmp);
val.set_vec(shift, blk);
} else if (shift < -wid) {
val = vvp_vector4_t(wid, BIT4_X);
@ -5524,8 +5524,9 @@ bool of_SHIFTL(vthread_t thr, vvp_code_t cp)
// Negative left shift is a right shift.
// For a negative shift, we pad with 'bx.
int use_shift = -shift;
val.mov(0, use_shift, wid-use_shift);
vvp_vector4_t blk = val.subvalue(use_shift, wid-use_shift);
vvp_vector4_t tmp (use_shift, BIT4_X);
val.set_vec(0, blk);
val.set_vec(wid-use_shift, tmp);
}
@ -5554,9 +5555,9 @@ bool of_SHIFTR(vthread_t thr, vvp_code_t cp)
val = vvp_vector4_t(wid, BIT4_0);
} else if (shift > 0) {
val.mov(0, shift, wid-shift);
vvp_vector4_t blk = val.subvalue(shift, wid-shift);
vvp_vector4_t tmp (shift, BIT4_0);
val.set_vec(0, blk);
val.set_vec(wid-shift, tmp);
} else if (shift < -wid) {
@ -5566,9 +5567,10 @@ bool of_SHIFTR(vthread_t thr, vvp_code_t cp)
// Negative right shift is a left shift.
// For a negative shift, we pad with 'bx.
int use_shift = -shift;
val.mov(use_shift, 0, wid-use_shift);
vvp_vector4_t blk = val.subvalue(0, wid-use_shift);
vvp_vector4_t tmp (use_shift, BIT4_X);
val.set_vec(0, tmp);
val.set_vec(use_shift, blk);
}
thr->push_vec4(val);
@ -5595,9 +5597,9 @@ bool of_SHIFTR_S(vthread_t thr, vvp_code_t cp)
val = vvp_vector4_t(wid, sign_bit);
} else if (shift > 0) {
val.mov(0, shift, wid-shift);
vvp_vector4_t blk = val.subvalue(shift, wid-shift);
vvp_vector4_t tmp (shift, sign_bit);
val.set_vec(0, blk);
val.set_vec(wid-shift, tmp);
} else if (shift < -wid) {
@ -5605,9 +5607,10 @@ bool of_SHIFTR_S(vthread_t thr, vvp_code_t cp)
} else if (shift < 0) {
int use_shift = -shift;
val.mov(use_shift, 0, wid-use_shift);
vvp_vector4_t blk = val.subvalue(0, wid-use_shift);
vvp_vector4_t tmp(use_shift, BIT4_X);
val.set_vec(0, tmp);
val.set_vec(use_shift, blk);
}
thr->push_vec4(val);