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MIPS: Fix emitted code for U32 to float conversion.

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This commit is contained in:
Mike Pall 2017-02-20 02:35:00 +01:00
parent 1abd779907
commit ee33a1f9b3
1 changed files with 7 additions and 11 deletions
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18
src/lj_asm_mips.h
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@ -443,18 +443,14 @@ static void asm_conv(ASMState *as, IRIns *ir)
/* y = (x ^ 0x8000000) + 2147483648.0 */
Reg left = ra_alloc1(as, lref, RSET_GPR);
Reg tmp = ra_scratch(as, rset_exclude(RSET_FPR, dest));
emit_fgh(as, irt_isfloat(ir->t) ? MIPSI_ADD_S : MIPSI_ADD_D,
dest, dest, tmp);
emit_fg(as, irt_isfloat(ir->t) ? MIPSI_CVT_S_W : MIPSI_CVT_D_W,
dest, dest);
if (irt_isfloat(ir->t))
emit_lsptr(as, MIPSI_LWC1, (tmp & 31),
(void *)lj_ir_k64_find(as->J, U64x(4f000000,4f000000)),
RSET_GPR);
else
emit_lsptr(as, MIPSI_LDC1, (tmp & 31),
(void *)lj_ir_k64_find(as->J, U64x(41e00000,00000000)),
RSET_GPR);
emit_fg(as, MIPSI_CVT_S_D, dest, dest);
/* Must perform arithmetic with doubles to keep the precision. */
emit_fgh(as, MIPSI_ADD_D, dest, dest, tmp);
emit_fg(as, MIPSI_CVT_D_W, dest, dest);
emit_lsptr(as, MIPSI_LDC1, (tmp & 31),
(void *)lj_ir_k64_find(as->J, U64x(41e00000,00000000)),
RSET_GPR);
emit_tg(as, MIPSI_MTC1, RID_TMP, dest);
emit_dst(as, MIPSI_XOR, RID_TMP, RID_TMP, left);
emit_ti(as, MIPSI_LUI, RID_TMP, 0x8000);