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| author | Andrew Waterman <andrew@sifive.com> | 2017-05-07 19:17:49 -0700 |
|---|---|---|
| committer | Andrew Waterman <andrew@sifive.com> | 2017-05-07 19:18:07 -0700 |
| commit | 56b0bf9dd7579b3aa433773650bb6328abff93f5 (patch) | |
| tree | b52192b714072897e1b235c27bbea8ba64094267 | |
| parent | 650d64e15836ca556e90980115f27f44618b855b (diff) | |
| download | riscv-isa-manual-56b0bf9dd7579b3aa433773650bb6328abff93f5.zip riscv-isa-manual-56b0bf9dd7579b3aa433773650bb6328abff93f5.tar.gz riscv-isa-manual-56b0bf9dd7579b3aa433773650bb6328abff93f5.tar.bz2 | |
SB/UJ -> B/J
| -rw-r--r-- | src/instr-table.tex | 4 | ||||
| -rw-r--r-- | src/rv32.tex | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/src/instr-table.tex b/src/instr-table.tex index 418a0f8..209c58d 100644 --- a/src/instr-table.tex +++ b/src/instr-table.tex @@ -55,7 +55,7 @@ \multicolumn{1}{c|}{rs1} & \multicolumn{1}{c|}{funct3} & \multicolumn{1}{c|}{imm[4:1$\vert$11]} & -\multicolumn{1}{c|}{opcode} & SB-type \\ +\multicolumn{1}{c|}{opcode} & B-type \\ \cline{2-11} @@ -69,7 +69,7 @@ & \multicolumn{8}{|c|}{imm[20$\vert$10:1$\vert$11$\vert$19:12]} & \multicolumn{1}{c|}{rd} & -\multicolumn{1}{c|}{opcode} & UJ-type \\ +\multicolumn{1}{c|}{opcode} & J-type \\ \cline{2-11} diff --git a/src/rv32.tex b/src/rv32.tex index dcaf335..3c08dd0 100644 --- a/src/rv32.tex +++ b/src/rv32.tex @@ -227,7 +227,7 @@ high-order bit in B format. Similarly, the only difference between the U and J formats is that the 20-bit immediate is shifted left by 12 bits to form U immediates and by 1 bit to form J immediates. The location of -instruction bits in the U and UJ format immediates is chosen to +instruction bits in the U and J format immediates is chosen to maximize overlap with the other formats and with each other. \begin{figure}[h] @@ -639,7 +639,7 @@ slots. \subsubsection*{Unconditional Jumps} -\vspace{-0.1in} The jump and link (JAL) instruction uses the UJ-type +\vspace{-0.1in} The jump and link (JAL) instruction uses the J-type format, where the J-immediate encodes a signed offset in multiples of 2 bytes. The offset is sign-extended and added to the {\tt pc} to form the jump target address. Jumps can therefore target a @@ -794,7 +794,7 @@ enable macro-op fusion of the sequences:\linebreak \subsubsection*{Conditional Branches} -All branch instructions use the SB-type instruction format. The +All branch instructions use the B-type instruction format. The 12-bit B-immediate encodes signed offsets in multiples of 2, and is added to the current {\tt pc} to give the target address. The conditional branch range is $\pm$\wunits{4}{KiB}. |