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Merge pull request #1364 from glg-rv/dev/glguida/amocas
Zacas extension
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| require_extension(EXT_ZACAS); | ||
|
|
||
| if (xlen == 32) { | ||
| // RV32: the spec defines two 32-bit comparisons. Since we're | ||
| // loading 64-bit for memory we have to adjust for endianness. | ||
| uint64_t comp, swap, res; | ||
|
|
||
| require_align(insn.rd(), 2); | ||
| require_align(insn.rs2(), 2); | ||
| if (insn.rd() == 0) { | ||
| comp = 0; | ||
| } else if (MMU.is_target_big_endian()) { | ||
| comp = (uint32_t)READ_REG(insn.rd() + 1) | (RD << 32); | ||
| } else { | ||
| comp = (uint32_t)RD | (READ_REG(insn.rd() + 1) << 32); | ||
| } | ||
| if (insn.rs2() == 0) { | ||
| swap = 0; | ||
| } else if (MMU.is_target_big_endian()) { | ||
| swap = (uint32_t)READ_REG(insn.rs2() + 1) | (RS2 << 32); | ||
| } else { | ||
| swap = (uint32_t)RS2 | (READ_REG(insn.rs2() + 1) << 32); | ||
| } | ||
| res = MMU.amo_compare_and_swap<uint64_t>(RS1, comp, swap); | ||
| if (insn.rd() != 0) { | ||
| if (MMU.is_target_big_endian()) { | ||
| WRITE_REG(insn.rd() + 1, sext32((uint32_t)res)); | ||
| WRITE_REG(insn.rd(), sext32(res >> 32)); | ||
| } else { | ||
| WRITE_REG(insn.rd(), sext32((uint32_t)res)); | ||
| WRITE_REG(insn.rd() + 1, sext32(res >> 32)); | ||
| } | ||
| } | ||
| } else { | ||
| // RV64 | ||
| WRITE_RD(MMU.amo_compare_and_swap<uint64_t>(RS1, RD, RS2)); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| require_extension(EXT_ZACAS); | ||
| require_rv64; | ||
| require_align(insn.rd(), 2); | ||
| require_align(insn.rs2(), 2); | ||
|
|
||
| // The spec defines two 64-bit comparisons. Since we're loading | ||
| // 128-bit for memory we have to adjust for endianness. | ||
|
|
||
| uint128_t comp, swap, res; | ||
|
|
||
| if (insn.rd() == 0) { | ||
| comp = 0; | ||
| } else if (MMU.is_target_big_endian()) { | ||
| comp = READ_REG(insn.rd() + 1) | ((uint128_t)RD << 64); | ||
| } else { | ||
| comp = RD | ((uint128_t)READ_REG(insn.rd() + 1) << 64); | ||
| } | ||
| if (insn.rs2() == 0) { | ||
| swap = 0; | ||
| } else if (MMU.is_target_big_endian()) { | ||
| swap = READ_REG(insn.rs2() + 1) | ((uint128_t)RS2 << 64); | ||
| } else { | ||
| swap = RS2 | ((uint128_t)READ_REG(insn.rs2() + 1) << 64); | ||
| } | ||
| res = MMU.amo_compare_and_swap<uint128_t>(RS1, comp, swap); | ||
| if (insn.rd() != 0) { | ||
| if (MMU.is_target_big_endian()) { | ||
| WRITE_REG(insn.rd(), res >> 64); | ||
| WRITE_REG(insn.rd() + 1, res); | ||
| } else { | ||
| WRITE_REG(insn.rd(), res); | ||
| WRITE_REG(insn.rd() + 1, res >> 64); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| require_extension(EXT_ZACAS); | ||
| WRITE_RD(sext32(MMU.amo_compare_and_swap<uint32_t>(RS1, RD, RS2))); |
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