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py/asmarm: Add asm_arm_ldrh_reg_reg_offset() helper func. 

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2022-05-20 16:18:09 +10:00
parent 94ae023136
commit 8af5e2551f
2 changed files with 6 additions and 0 deletions
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5
py/asmarm.c
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@ -304,6 +304,11 @@ void asm_arm_ldrh_reg_reg(asm_arm_t *as, uint rd, uint rn) {
emit_al(as, 0x1d000b0 | (rn << 16) | (rd << 12));
}
void asm_arm_ldrh_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offset) {
// ldrh rd, [rn, #off]
emit_al(as, 0x1f000b0 | (rn << 16) | (rd << 12) | ((byte_offset & 0xf0) << 4) | (byte_offset & 0xf));
}
void asm_arm_ldrb_reg_reg(asm_arm_t *as, uint rd, uint rn) {
// ldrb rd, [rn]
emit_al(as, 0x5d00000 | (rn << 16) | (rd << 12));

1
py/asmarm.h
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@ -109,6 +109,7 @@ void asm_arm_asr_reg_reg(asm_arm_t *as, uint rd, uint rs);
// memory
void asm_arm_ldr_reg_reg(asm_arm_t *as, uint rd, uint rn, uint byte_offset);
void asm_arm_ldrh_reg_reg(asm_arm_t *as, uint rd, uint rn);
void asm_arm_ldrh_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offset);
void asm_arm_ldrb_reg_reg(asm_arm_t *as, uint rd, uint rn);
void asm_arm_str_reg_reg(asm_arm_t *as, uint rd, uint rm, uint byte_offset);
void asm_arm_strh_reg_reg(asm_arm_t *as, uint rd, uint rm);