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drc: arm: use movw/movt
[picodrive.git]
/
cpu
/
drc
/
emit_arm.c
diff --git
a/cpu/drc/emit_arm.c
b/cpu/drc/emit_arm.c
index
2ac8e32
..
eb5f332
100644
(file)
--- a/
cpu/drc/emit_arm.c
+++ b/
cpu/drc/emit_arm.c
@@
-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_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)
// 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;
}
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:
break;
case A_OP_EOR:
@@
-739,7
+757,7
@@
static int emith_xbranch(int cond, void *target, int is_call)
#define emith_sh2_wcall(a, tab) { \
emith_lsr(12, a, SH2_WRITE_SHIFT); \
EOP_LDR_REG_LSL(A_COND_AL,12,tab,12,2); \
#define emith_sh2_wcall(a, tab) { \
emith_lsr(12, a, SH2_WRITE_SHIFT); \
EOP_LDR_REG_LSL(A_COND_AL,12,tab,12,2); \
- emith_
ctx_read(2, offsetof(SH2, is_slave)
); \
+ emith_
move_r_r(2, CONTEXT_REG
); \
emith_jump_reg(12); \
}
emith_jump_reg(12); \
}