RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

drc: arm: use movw/movt

Browse source 
it's about time...
This commit is contained in:
notaz 2017-12-03 17:41:30 +02:00
parent 00468b0a9b
commit 98a3d79ba2
2 changed files with 19 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

18
cpu/drc/emit_arm.c
View file

@ -243,6 +243,11 @@
#define EOP_MSR_IMM(ror2,imm) EOP_C_MSR_IMM(A_COND_AL,ror2,imm)
#define EOP_MSR_REG(rm) EOP_C_MSR_REG(A_COND_AL,rm)
#define EOP_MOVW(rd,imm) \
EMIT(0xe3000000 | ((rd)<<12) | ((imm)&0xfff) | (((imm)<<4)&0xf0000))
#define EOP_MOVT(rd,imm) \
EMIT(0xe3400000 | ((rd)<<12) | (((imm)>>16)&0xfff) | (((imm)>>12)&0xf0000))
// XXX: AND, RSB, *C, will break if 1 insn is not enough
static void emith_op_imm2(int cond, int s, int op, int rd, int rn, unsigned int imm)
@ -257,6 +262,19 @@ static void emith_op_imm2(int cond, int s, int op, int rd, int rn, unsigned int
imm = ~imm;
op = A_OP_MVN;
}
#ifdef HAVE_ARMV7
for (v = imm, ror2 = 0; v && !(v & 3); v >>= 2)
ror2--;
if (v >> 8) {
/* 2+ insns needed - prefer movw/movt */
if (op == A_OP_MVN)
imm = ~imm;
EOP_MOVW(rd, imm);
if (imm & 0xffff0000)
EOP_MOVT(rd, imm);
return;
}
#endif
break;
case A_OP_EOR: