diff options
Diffstat (limited to 'arm/arm_stub.S')
| -rw-r--r-- | arm/arm_stub.S | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/arm/arm_stub.S b/arm/arm_stub.S index 222bb21..d7203f8 100644 --- a/arm/arm_stub.S +++ b/arm/arm_stub.S @@ -67,14 +67,8 @@ _##symbol: #define MODE_SUPERVISOR 3 -#ifdef __ARM_ARCH_7A__ - #define extract_u16(rd, rs) \ - uxth rd, rs -#else - #define extract_u16(rd, rs) \ - bic rd, rs, #0xff000000 ;\ - bic rd, rd, #0x00ff0000 -#endif +#define extract_u16(rd, rs) \ + uxth rd, rs @ Will load the register set from memory into the appropriate cached registers. @ See arm_emit.h for listing explanation. @@ -777,12 +771,10 @@ lookup_pc: #define sign_extend_u32(reg) #define sign_extend_s8(reg) ;\ - mov reg, reg, lsl #24 /* shift reg into upper 8bits */;\ - mov reg, reg, asr #24 /* shift down, sign extending */;\ + sxtb reg, reg #define sign_extend_s16(reg) ;\ - mov reg, reg, lsl #16 /* shift reg into upper 16bits */;\ - mov reg, reg, asr #16 /* shift down, sign extending */;\ + sxth reg, reg #define execute_load_op_u8(load_op) ;\ mov r0, r0, lsl #17 ;\ @@ -836,11 +828,11 @@ ext_load_##load_type: ;\ .pool -execute_load_builder(u8, 8, ldrneb, #0xF0000000) -execute_load_builder(s8, 8, ldrnesb, #0xF0000000) -execute_load_builder(u16, 16, ldrneh, #0xF0000001) -execute_load_builder(s16, 16_signed, ldrnesh, #0xF0000001) -execute_load_builder(u32, 32, ldrne, #0xF0000000) +execute_load_builder(u8, 8, ldrb, #0xF0000000) +execute_load_builder(s8, 8, ldrsb, #0xF0000000) +execute_load_builder(u16, 16, ldrh, #0xF0000001) +execute_load_builder(s16, 16_signed, ldrsh, #0xF0000001) +execute_load_builder(u32, 32, ldr, #0xF0000003) .data |