Mercurial > repos > blastem
changeset 684:bff307e03a94
Added ldr and str instructions to gen_arm
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Wed, 07 Jan 2015 22:42:35 -0800 |
parents | 963d5901f583 |
children | 943b9323bf60 |
files | gen_arm.c gen_arm.h |
diffstat | 2 files changed, 40 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/gen_arm.c Sat Mar 08 00:15:09 2014 -0800 +++ b/gen_arm.c Wed Jan 07 22:42:35 2015 -0800 @@ -548,3 +548,39 @@ *(code->cur++) = cc | POPM | reglist; return CODE_OK; } + +uint32_t load_store_immoff(code_info *code, uint32_t op, uint32_t dst, uint32_t base, int32_t offset, uint32_t cc) +{ + if (offset >= 0x1000 || offset <= -0x1000) { + return INVALID_IMMED; + } + check_alloc_code(code); + uint32_t instruction = cc | op | POST_IND | OFF_IMM | SZ_W | base << 16 | dst << 12; + if (offset >= 0) { + instruction |= offset | DIR_UP; + } else { + instruction |= (-offset) | DIR_DOWN; + } + *(code->cur++) = instruction; + return CODE_OK; +} + +uint32_t ldr_cc(code_info *code, uint32_t dst, uint32_t base, int32_t offset, uint32_t cc) +{ + return load_store_immoff(code, OP_LDR, dst, base, offset, cc); +} + +uint32_t ldr(code_info *code, uint32_t dst, uint32_t base, int32_t offset) +{ + return ldr_cc(code, dst, base, offset, CC_AL); +} + +uint32_t str_cc(code_info *code, uint32_t src, uint32_t base, int32_t offset, uint32_t cc) +{ + return load_store_immoff(code, OP_STR, src, base, offset, cc); +} + +uint32_t str(code_info *code, uint32_t src, uint32_t base, int32_t offset) +{ + return str_cc(code, src, base, offset, CC_AL); +}
--- a/gen_arm.h Sat Mar 08 00:15:09 2014 -0800 +++ b/gen_arm.h Wed Jan 07 22:42:35 2015 -0800 @@ -149,5 +149,9 @@ uint32_t pop_cc(code_info *code, uint32_t reg, uint32_t cc); uint32_t popm(code_info *code, uint32_t reglist); uint32_t popm_cc(code_info *code, uint32_t reglist, uint32_t cc); +uint32_t ldr_cc(code_info *code, uint32_t dst, uint32_t base, int32_t offset, uint32_t cc); +uint32_t ldr(code_info *code, uint32_t rst, uint32_t base, int32_t offset); +uint32_t str_cc(code_info *code, uint32_t src, uint32_t base, int32_t offset, uint32_t cc); +uint32_t str(code_info *code, uint32_t src, uint32_t base, int32_t offset); #endif //GEN_ARM_H_