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| author | Jan Beulich <jbeulich@suse.com> | 2022-11-02 08:18:24 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2022-11-02 08:18:24 +0100 |
| commit | be1643ff057c5346bdabcd2577cbc2bea57f7243 (patch) | |
| tree | 024660da59f4cbc0b670c27e9245887efcca601c /gas | |
| parent | d918451a044821abd285f7a5bc5547ec9b50a118 (diff) | |
| download | gdb-be1643ff057c5346bdabcd2577cbc2bea57f7243.zip gdb-be1643ff057c5346bdabcd2577cbc2bea57f7243.tar.gz gdb-be1643ff057c5346bdabcd2577cbc2bea57f7243.tar.bz2 | |
x86: simplify expressions in update_imm()
Comparing the sum of the relevant .imm<N> fields against a constant imo
makes more obvious what is actually meant. It allows dropping of two
static variables, with a 3rd drop requiring two more minor adjustments
elsewhere, utilizing that "i" is zeroed first thing in md_assemble().
This also increases the chances of the compiler doing the calculations
all in registers.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/config/tc-i386.c | 37 |
1 files changed, 14 insertions, 23 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 992ae94..0fc2cbe 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -1930,12 +1930,9 @@ operand_type_xor (i386_operand_type x, i386_operand_type y) static const i386_operand_type disp16_32 = OPERAND_TYPE_DISP16_32; static const i386_operand_type anydisp = OPERAND_TYPE_ANYDISP; static const i386_operand_type regxmm = OPERAND_TYPE_REGXMM; -static const i386_operand_type imm8 = OPERAND_TYPE_IMM8; -static const i386_operand_type imm8s = OPERAND_TYPE_IMM8S; static const i386_operand_type imm16 = OPERAND_TYPE_IMM16; static const i386_operand_type imm32 = OPERAND_TYPE_IMM32; static const i386_operand_type imm32s = OPERAND_TYPE_IMM32S; -static const i386_operand_type imm64 = OPERAND_TYPE_IMM64; static const i386_operand_type imm16_32 = OPERAND_TYPE_IMM16_32; static const i386_operand_type imm16_32s = OPERAND_TYPE_IMM16_32S; static const i386_operand_type imm16_32_32s = OPERAND_TYPE_IMM16_32_32S; @@ -3998,7 +3995,7 @@ process_immext (void) exp = &im_expressions[i.imm_operands++]; i.op[i.operands].imms = exp; - i.types[i.operands] = imm8; + i.types[i.operands].bitfield.imm8 = 1; i.operands++; exp->X_op = O_constant; exp->X_add_number = i.tm.extension_opcode; @@ -7674,18 +7671,12 @@ static int update_imm (unsigned int j) { i386_operand_type overlap = i.types[j]; - if ((overlap.bitfield.imm8 - || overlap.bitfield.imm8s - || overlap.bitfield.imm16 - || overlap.bitfield.imm32 - || overlap.bitfield.imm32s - || overlap.bitfield.imm64) - && !operand_type_equal (&overlap, &imm8) - && !operand_type_equal (&overlap, &imm8s) - && !operand_type_equal (&overlap, &imm16) - && !operand_type_equal (&overlap, &imm32) - && !operand_type_equal (&overlap, &imm32s) - && !operand_type_equal (&overlap, &imm64)) + if (overlap.bitfield.imm8 + + overlap.bitfield.imm8s + + overlap.bitfield.imm16 + + overlap.bitfield.imm32 + + overlap.bitfield.imm32s + + overlap.bitfield.imm64 > 1) { if (i.suffix) { @@ -7722,12 +7713,12 @@ update_imm (unsigned int j) else if (i.prefix[DATA_PREFIX]) overlap = operand_type_and (overlap, flag_code != CODE_16BIT ? imm16 : imm32); - if (!operand_type_equal (&overlap, &imm8) - && !operand_type_equal (&overlap, &imm8s) - && !operand_type_equal (&overlap, &imm16) - && !operand_type_equal (&overlap, &imm32) - && !operand_type_equal (&overlap, &imm32s) - && !operand_type_equal (&overlap, &imm64)) + if (overlap.bitfield.imm8 + + overlap.bitfield.imm8s + + overlap.bitfield.imm16 + + overlap.bitfield.imm32 + + overlap.bitfield.imm32s + + overlap.bitfield.imm64 != 1) { as_bad (_("no instruction mnemonic suffix given; " "can't determine immediate size")); @@ -8086,7 +8077,7 @@ build_modrm_byte (void) immediate operand to encode the first operand. */ exp = &im_expressions[i.imm_operands++]; i.op[i.operands].imms = exp; - i.types[i.operands] = imm8; + i.types[i.operands].bitfield.imm8 = 1; i.operands++; gas_assert (i.tm.operand_types[reg_slot].bitfield.class == RegSIMD); |