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Richard Yan
2025-01-29 21:22:41 -08:00
parent f98cd9bc22
commit 0d842a5930
348 changed files with 6 additions and 136287 deletions
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*~
*#
*.#*

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```
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Rocket Custom Coprocessor (RoCC) Software
========================================
This is a set of C and RISC-V Assembly macros that help with emitting custom RISC-V instructions for talking with Rocket Custom Coprocessors (RoCCs).

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// Copyright 2018 IBM
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ROCC_SOFTWARE_SRC_RISCV_TEST_ROCC_H_
#define ROCC_SOFTWARE_SRC_RISCV_TEST_ROCC_H_
#define RVTEST_XS_ENABLE \
li a0, MSTATUS_XS & (MSTATUS_XS >> 1); \
csrs mstatus, a0;
#define RVTEST_WITH_ROCC \
.macro init; \
RVTEST_XS_ENABLE \
.endm
#endif // ROCC_SOFTWARE_SRC_RISCV_TEST_ROCC_H_

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// Copyright 2018--2020 IBM
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ROCC_SOFTWARE_SRC_XCUSTOM_H_
#define ROCC_SOFTWARE_SRC_XCUSTOM_H_
#define STR1(x) #x
#ifndef STR
#define STR(x) STR1(x)
#endif
#define CAT_(A, B) A##B
#define CAT(A, B) CAT_(A, B)
/** Assembly macro for creating "raw" Rocket Custom Coproessor (RoCC)
* assembly language instructions that will return data in rd. These
* are to be used only in assembly language programs (not C/C++).
*
* Example:
*
* Consider the following macro consisting of a CUSTOM_0 instruction
* with func7 "42" that is doing some operation of "a0 = op(a1, a2)":
*
* ROCC_INSTRUCTION_RAW_R_R_R(0, a0, a1, a2, 42)
*
* This will produce the following pseudo assembly language
* instruction:
*
* .insn r CUSTOM_0, 7, 42, a0, a1, a2
*
* @param x the custom instruction number: 0, 1, 2, or 3
* @param rd the destination register, e.g., a0 or x10
* @param rs1 the first source register, e.g., a0 or x10
* @param rs2 the second source register, e.g., a0 or x10
* @param func7 the value of the func7 field
* @return a raw .insn RoCC instruction
*/
#define ROCC_INSTRUCTION_RAW_R_R_R(x, rd, rs1, rs2, func7) \
.insn r CAT(CUSTOM_, x), 7, func7, rd, rs1, rs2
/** Assembly macro for creating "raw" Rocket Custom Coproessor (RoCC)
* assembly language instructions that will *NOT* return data in rd.
* These are to be used only in assembly language programs (not
* C/C++).
*
* Example:
*
* Consider the following macro consisting of a CUSTOM_1 instruction
* with func7 "42" that is doing some operation of "op(a1, a2)". *NO*
* data is returned:
*
* ROCC_INSTRUCTION_RAW_R_R_R(1, a1, a2, 42)
*
* This will produce the following pseudo assembly language
* instruction:
*
* .insn r CUSTOM_1, 3, 42, x0, a1, a2
*
* @param x the custom instruction number: 0, 1, 2, or 3
* @param rs1 the first source register, e.g., a0 or x10
* @param rs2 the second source register, e.g., a0 or x10
* @param func7 the value of the func7 field
* @return a raw .insn RoCC instruction
*/
#define ROCC_INSTRUCTION_RAW_0_R_R(x, rs1, rs2, func7) \
.insn r CAT(CUSTOM_, x), 3, func7, x0, rs1, rs2
/** C/C++ inline assembly macro for creating Rocket Custom Coprocessor
* (RoCC) instructions that return data in rd. These are to be used
* only in C/C++ programs (not bare assembly).
*
* This is equivalent to ROCC_INSTRUCTION_R_R_R. See it's
* documentation.
*/
#define ROCC_INSTRUCTION(x, rd, rs1, rs2, func7) \
ROCC_INSTRUCTION_R_R_R(x, rd, rs1, rs2, func7)
/** C/C++ inline assembly macro for creating Rocket Custom Coprocessor
* (RoCC) instructions that return data in C variable rd.
* These are to be used only in C/C++ programs (not bare assembly).
*
* Example:
*
* Consider the following macro consisting of a CUSTOM_2 instruction
* with func7 "42" that is doing some operation of "a0 = op(a1, a2)"
* (where a0, a1, and a2 are variables defined in C):
*
* ROCC_INSTRUCTION(2, a0, a1, a2, 42)
*
* This will produce the following inline assembly:
*
* asm volatile(
* ".insn r CUSTOM_2, 0x7, 42, %0, %1, %2"
* : "=r"(rd)
* : "r"(rs1), "r"(rs2));
*
* @param x the custom instruction number: 0, 1, 2, or 3
* @param rd the C variable to capture as destination operand
* @param rs1 the C variable to capture for first source register
* @param rs2 the C variable to capture for second source register
* @param func7 the value of the func7 field
* @return an inline assembly RoCC instruction
*/
#define ROCC_INSTRUCTION_R_R_R(x, rd, rs1, rs2, func7) \
{ \
asm volatile( \
".insn r " STR(CAT(CUSTOM_, x)) ", " STR(0x7) ", " STR(func7) ", %0, %1, %2" \
: "=r"(rd) \
: "r"(rs1), "r"(rs2)); \
}
/** C/C++ inline assembly macro for creating Rocket Custom Coprocessor
* (RoCC) instructions that return data in C variable rd.
* These are to be used only in C/C++ programs (not bare assembly).
*
* Example:
*
* Consider the following macro consisting of a CUSTOM_3 instruction
* with func7 "42" that is doing some operation of "a0 = op(a1, a2)"
* (where a0, a1, and a2 are variables defined in C):
*
* ROCC_INSTRUCTION(3, a0, a1, a2, 42)
*
* This will produce the following inline assembly:
*
* asm volatile(
* ".insn r CUSTOM_3, 0x7, 42, %0, %1, %2"
* :: "r"(rs1), "r"(rs2));
*
* @param x the custom instruction number: 0, 1, 2, or 3
* @param rs1 the C variable to capture for first source register
* @param rs2 the C variable to capture for second source register
* @param funct7 the value of the funct7 f
* @return an inline assembly RoCC instruction
*/
#define ROCC_INSTRUCTION_0_R_R(x, rs1, rs2, func7) \
{ \
asm volatile( \
".insn r " STR(CAT(CUSTOM_, x)) ", " STR(0x3) ", " STR(func7) ", x0, %0, %1" \
: \
: "r"(rs1), "r"(rs2)); \
}
// [TODO] fix these to align with the above approach
// Macro to pass rs2_ as an immediate
/*
#define ROCC_INSTRUCTION_R_R_I(XCUSTOM_, rd_, rs1_, rs2_, funct_) \
asm volatile (XCUSTOM_" %[rd], %[rs1], %[rs2], %[funct]" \
: [rd] "=r" (rd_) \
: [rs1] "r" (rs1_), [rs2] "i" (rs2_), [funct] "i" (funct_))
// Macro to pass rs1_ and rs2_ as immediates
#define ROCC_INSTRUCTION_R_I_I(XCUSTOM_, rd_, rs1_, rs2_, funct_) \
asm volatile (XCUSTOM_" %[rd], %[rs1], %[rs2], %[funct]" \
: [rd] "=r" (rd_) \
: [rs1] "i" (rs1_), [rs2] "i" (rs2_), [funct] "i" (funct_))
*/
#endif // ROCC_SOFTWARE_SRC_XCUSTOM_H_