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sh2 drc: speed optimization and bugfixing

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This commit is contained in:
kub 2019-10-10 23:52:39 +02:00
parent c3ebe082d3
commit 7869213d35
5 changed files with 61 additions and 55 deletions
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18
cpu/drc/emit_arm64.c
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@ -160,7 +160,7 @@ enum { XT_UXTW=0x4, XT_UXTX=0x6, XT_LSL=0x7, XT_SXTW=0xc, XT_SXTX=0xe };
#define A64_ROR_REG(rd, rn, rm) \
A64_INSN(0xd,0x0,0x3,_,rm,_,0xb,rn,rd)
// rd = REVERSE(n) rn
// rd = REVERSE(rn)
#define A64_RBIT_REG(rd, rn) \
A64_INSN(0xd,0x2,0x3,_,_,_,_,rn,rd)
@ -327,9 +327,10 @@ enum { AM_IDX, AM_IDXPOST, AM_IDXREG, AM_IDXPRE };
// if-then-else conditional execution helpers
#define JMP_POS(ptr) \
#define JMP_POS(ptr) { \
ptr = tcache_ptr; \
EMIT(A64_B(0));
EMIT(A64_B(0)); \
}
#define JMP_EMIT(cond, ptr) { \
u32 val_ = (u8 *)tcache_ptr - (u8 *)(ptr); \
@ -1225,9 +1226,9 @@ static void emith_ldst_offs(int sz, int rd, int rn, int o9, int ld, int mode)
emith_tst_r_imm(sr, S); \
EMITH_SJMP_START(DCOND_EQ); \
/* overflow if top 17 bits of MACH aren't all 1 or 0 */ \
/* to check: add MACH[15] to MACH[31:16]. this is 0 if no overflow */ \
emith_asrf(rn, mh, 16); /* sum = (MACH>>16) + ((MACH>>15)&1) */ \
emith_adcf_r_imm(rn, 0); /* (MACH>>15) is in carry after shift */ \
/* to check: add MACH >> 31 to MACH >> 15. this is 0 if no overflow */ \
emith_asr(rn, mh, 15); \
emith_addf_r_r_r_lsr(rn, rn, mh, 31); \
EMITH_SJMP_START(DCOND_EQ); /* sum != 0 -> ov */ \
emith_move_r_imm_c(DCOND_NE, ml, 0x0000); /* -overflow */ \
emith_move_r_imm_c(DCOND_NE, mh, 0x8000); \
@ -1280,11 +1281,12 @@ static void emith_ldst_offs(int sz, int rd, int rn, int o9, int ld, int mode)
#define emith_tpop_carry(sr, is_sub) do { \
if (is_sub) \
emith_eor_r_imm(sr, 1); \
emith_lsrf(sr, sr, 1); \
emith_ror(sr, sr, 1); \
emith_addf_r_r(sr, sr); \
} while (0)
#define emith_tpush_carry(sr, is_sub) do { \
emith_adc_r_r(sr, sr); \
emith_adc_r_r(sr, Z0); \
if (is_sub) \
emith_eor_r_imm(sr, 1); \
} while (0)