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sh2 drc, small improvements and bug fixes for code emitters

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This commit is contained in:
kub 2019-11-19 21:59:44 +01:00
parent cf0dd6ae48
commit f2d19ddf2a
6 changed files with 194 additions and 83 deletions
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11
cpu/drc/emit_x86.c
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@ -974,7 +974,7 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI, // x86-64,i386 common
JMP8_EMIT_NC(else_ptr); \
}
// "simple" jump (no more then a few insns)
// "simple" jump (no more than a few insns)
// ARM will use conditional instructions here
#define EMITH_SJMP_START EMITH_JMP_START
#define EMITH_SJMP_END EMITH_JMP_END
@ -1287,15 +1287,19 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI, // x86-64,i386 common
emith_adc_r_r(sr, sr)
/*
* T = carry(Rn = (Rn << 1) | T)
* if Q
* t = carry(Rn += Rm)
* else
* t = carry(Rn -= Rm)
* T ^= t
* T = !(T ^ t)
*/
#define emith_sh2_div1_step(rn, rm, sr) do { \
u8 *jmp0, *jmp1; \
int tmp_ = rcache_get_tmp(); \
emith_tpop_carry(sr, 0); /* Rn = 2*Rn+T */\
emith_adcf_r_r_r(rn, rn, rn); \
emith_tpush_carry(sr, 0); /* T = C1 */ \
emith_eor_r_r(tmp_, tmp_); \
emith_tst_r_imm(sr, Q); /* if (Q ^ M) */ \
JMP8_POS(jmp0); /* je do_sub */ \
@ -1305,7 +1309,8 @@ enum { xAX = 0, xCX, xDX, xBX, xSP, xBP, xSI, xDI, // x86-64,i386 common
emith_sub_r_r(rn, rm); \
JMP8_EMIT_NC(jmp1); /* done: */ \
emith_adc_r_r(tmp_, tmp_); \
emith_eor_r_r(sr, tmp_); \
emith_eor_r_r(sr, tmp_);/* T = !(C1^C2) */\
emith_eor_r_imm(sr, T); \
rcache_free_tmp(tmp_); \
} while (0)