89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
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/*
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* Source file for floating point operations.
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*
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* CAR (Cool ARM Ripoff) copyright (c) 2026 David J Goeke. All rights reserved.
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* Unauthorized (re)distribution is prohibited.
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*/
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// This is mostly just wrappers around the hardware/system FPU.
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// We don't do any calculations ourselves.
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#include "include/defs.h"
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DEFINE_OP(fp_add)
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{
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register_instruction_t i = convert_raw2register(ri);
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uint8_t dest = i.dest;
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uint8_t src1 = i.src1;
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uint8_t src2 = i.src2;
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state->gprs[dest] = (uint32_t) ((float) state->gprs[src1] + (float) state->gprs[src2]);
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OP_RETURN_NORMAL
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}
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DEFINE_OP(fp_sub)
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{
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register_instruction_t i = convert_raw2register(ri);
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uint8_t dest = i.dest;
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uint8_t src1 = i.src1;
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uint8_t src2 = i.src2;
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state->gprs[dest] = (uint32_t) ((float) state->gprs[src1] - (float) state->gprs[src2]);
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OP_RETURN_NORMAL
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}
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DEFINE_OP(fp_mul)
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{
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register_instruction_t i = convert_raw2register(ri);
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uint8_t dest = i.dest;
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uint8_t src1 = i.src1;
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uint8_t src2 = i.src2;
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state->gprs[dest] = (uint32_t) ((float) state->gprs[src1] * (float) state->gprs[src2]);
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OP_RETURN_NORMAL
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}
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DEFINE_OP(fp_div)
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{
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register_instruction_t i = convert_raw2register(ri);
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uint8_t dest = i.dest;
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uint32_t src1 = state->gprs[i.src1];
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uint32_t src2 = state->gprs[i.src2];
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if (src1 != 0 && src2 != 0)
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{
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state->gprs[dest] = (uint32_t) ((float) src1 / (float) src2);
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OP_RETURN_NORMAL
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}
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state->gprs[dest] = 0xffffffff;
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OP_RETURN_NORMAL
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}
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DEFINE_OP(fp_mod)
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{
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register_instruction_t i = convert_raw2register(ri);
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uint8_t dest = i.dest;
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uint32_t src1 = state->gprs[i.src1];
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uint32_t src2 = state->gprs[i.src2];
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if (src1 != 0 && src2 != 0)
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{
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state->gprs[dest] = (uint32_t) ((float) src1 / (float) src2);
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OP_RETURN_NORMAL
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}
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state->gprs[dest] = 0xffffffff;
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OP_RETURN_NORMAL
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}
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