armemu: Fix SMUAD, SMUSD, and SMLAD

Wrong values were being multiplied together.
10 years ago · d5bcddb77c
parent 0f9e3baf39
commit d5bcddb77c
1 changed files with 3 additions and 3 deletions
--- a/src/core/arm/interpreter/armemu.cpp
+++ b/src/core/arm/interpreter/armemu.cpp
@ -6243,16 +6243,16 @@ L_stm_s_takeabort:

                // SMUAD
                if ((instr & 0xf0d0) == 0xf010) {
-                    state->Reg[rd_idx] = (rn_lo * rn_hi) + (rm_lo * rm_hi);
+                    state->Reg[rd_idx] = (rn_lo * rm_lo) + (rn_hi * rm_hi);
                }
                // SMUSD
                else if ((instr & 0xf0d0) == 0xf050) {
-                    state->Reg[rd_idx] = (rn_lo * rn_hi) - (rm_lo * rm_hi);
+                    state->Reg[rd_idx] = (rn_lo * rm_lo) - (rn_hi * rm_hi);
                }
                // SMLAD
                else {
                    const u8 ra_idx = BITS(12, 15);
-                    state->Reg[rd_idx] = (rn_lo * rn_hi) + (rm_lo * rm_hi) + (s32)state->Reg[ra_idx];
+                    state->Reg[rd_idx] = (rn_lo * rm_lo) + (rn_hi * rm_hi) + (s32)state->Reg[ra_idx];
                }
                return 1;
            } else {