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64bit literal RSH

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R=rsc
APPROVED=rsc
DELTA=85  (35 added, 0 deleted, 50 changed)
OCL=33761
CL=33767
This commit is contained in:
Kai Backman 2009-08-24 13:57:04 -07:00
parent 9a36b8087c
commit c6fd23ce6d
3 changed files with 84 additions and 49 deletions
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125
src/cmd/5g/cgen64.c
View File

@ -17,7 +17,7 @@ cgen64(Node *n, Node *res)
Node al, ah, bl, bh, cl, ch; //, s1, s2;
Prog *p1;
//, *p2;
// uint64 v;
uint64 v;
// uint32 lv, hv;
if(res->op != OINDREG && res->op != ONAME) {
@ -191,54 +191,83 @@ cgen64(Node *n, Node *res)
// regfree(&s2);
// break;
// case ORSH:
// if(r->op == OLITERAL) {
// fatal("cgen64 ORSH, OLITERAL not implemented");
// v = mpgetfix(r->val.u.xval);
// if(v >= 64) {
// if(is64(r->type))
// splitclean();
// splitclean();
// split64(res, &lo2, &hi2);
// if(hi1.type->etype == TINT32) {
// gmove(&hi1, &lo2);
// gins(ASARL, ncon(31), &lo2);
// gmove(&hi1, &hi2);
// gins(ASARL, ncon(31), &hi2);
// } else {
// gins(AMOVL, ncon(0), &lo2);
// gins(AMOVL, ncon(0), &hi2);
// }
// splitclean();
// goto out;
// }
// if(v >= 32) {
// if(is64(r->type))
// splitclean();
// split64(res, &lo2, &hi2);
// gmove(&hi1, &lo2);
// if(v > 32)
// gins(optoas(ORSH, hi1.type), ncon(v-32), &lo2);
// if(hi1.type->etype == TINT32) {
// gmove(&hi1, &hi2);
// gins(ASARL, ncon(31), &hi2);
// } else
// gins(AMOVL, ncon(0), &hi2);
// splitclean();
// splitclean();
// goto out;
// }
case ORSH:
if(r->op == OLITERAL) {
v = mpgetfix(r->val.u.xval);
if(v >= 64) {
if(hi1.type->etype == TINT32) {
// MOVW hi1->31, al
p1 = gins(AMOVW, &hi1, &al);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_AR | 31 << 7 | hi1.val.u.reg;
p1->from.reg = NREG;
// // general shift
// gins(AMOVL, &lo1, &ax);
// gins(AMOVL, &hi1, &dx);
// p1 = gins(ASHRL, ncon(v), &ax);
// p1->from.index = D_DX; // double-width shift
// p1->from.scale = 0;
// gins(optoas(ORSH, hi1.type), ncon(v), &dx);
// break;
// }
// fatal("cgen64 ORSH, !OLITERAL not implemented");
// MOVW hi1->31, ah
p1 = gins(AMOVW, &hi1, &ah);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_AR | 31 << 7 | hi1.val.u.reg;
p1->from.reg = NREG;
} else {
gins(AEOR, &al, &al);
gins(AEOR, &ah, &ah);
}
break;
}
if(v >= 32) {
if(hi1.type->etype == TINT32) {
// MOVW hi1->(v-32), al
p1 = gins(AMOVW, &hi1, &al);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_AR | (v-32)<<7 | hi1.val.u.reg;
p1->from.reg = NREG;
// MOVW hi1->31, ah
p1 = gins(AMOVW, &hi1, &ah);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_AR | 31<<7 | hi1.val.u.reg;
p1->from.reg = NREG;
} else {
// MOVW hi1>>(v-32), al
p1 = gins(AMOVW, &hi1, &al);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_LR | (v-32)<<7 | hi1.val.u.reg;
p1->from.reg = NREG;
gins(AEOR, &ah, &ah);
}
break;
}
// general shift
// MOVW lo1>>v, al
p1 = gins(AMOVW, &lo1, &al);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_LR | v<<7 | lo1.val.u.reg;
p1->from.reg = NREG;
// OR hi1<<(32-v), al, al
p1 = gins(AORR, &hi1, &al);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_LL | (32-v)<<7 | hi1.val.u.reg;
p1->from.reg = NREG;
p1->reg = al.val.u.reg;
if(hi1.type->etype == TINT32) {
// MOVW hi1->v, ah
p1 = gins(AMOVW, &hi1, &ah);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_AR | v<<7 | hi1.val.u.reg;
p1->from.reg = NREG;
} else {
// MOVW hi1>>v, ah
p1 = gins(AMOVW, &hi1, &ah);
p1->from.type = D_SHIFT;
p1->from.offset = SHIFT_LR | v<<7 | hi1.val.u.reg;
p1->from.reg = NREG;
}
break;
}
fatal("cgen64 ORSH, !OLITERAL not implemented");
// // load value into DX:AX.
// gins(AMOVL, &lo1, &ax);

2
src/cmd/5g/gsubr.c
View File

@ -811,7 +811,7 @@ rdst:
hard:
// requires register intermediate
regalloc(&r1, cvt, T);
regalloc(&r1, cvt, N);
gmove(f, &r1);
gmove(&r1, t);
regfree(&r1);

6
src/cmd/5l/5.out.h
View File

@ -203,6 +203,12 @@ enum as
#define C_SCOND_NONE 14
#define C_SCOND_NV 15
/* D_SHIFT type */
#define SHIFT_LL 0<<5
#define SHIFT_LR 1<<5
#define SHIFT_AR 2<<5
#define SHIFT_RR 3<<5
/* type/name */
#define D_GOK 0
#define D_NONE 1