--- /dev/null
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "radeon_compiler_util.h"
+#include "radeon_program.h"
+
+#include "rc_test_helpers.h"
+#include "unit_test.h"
+
+static void test_rc_inst_can_use_presub(
+ struct test_result * result,
+ int expected,
+ const char * add_str,
+ const char * replace_str)
+{
+ struct rc_instruction add_inst, replace_inst;
+ int ret;
+
+ test_begin(result);
+ init_rc_normal_instruction(&add_inst, add_str);
+ init_rc_normal_instruction(&replace_inst, replace_str);
+
+ ret = rc_inst_can_use_presub(&replace_inst, RC_PRESUB_ADD, 0,
+ replace_inst.U.I.SrcReg[0],
+ add_inst.U.I.SrcReg[0], add_inst.U.I.SrcReg[1]);
+
+ test_check(result, ret == expected);
+}
+
+static void test_runner_rc_inst_can_use_presub(struct test_result * result)
+{
+
+ /* This tests the case where the source being replace has the same
+ * register file and register index as another source register in the
+ * CMP instruction. A previous version of this function was ignoring
+ * all registers that shared the same file and index as the replacement
+ * register when counting the number of source selects.
+ *
+ * https://bugs.freedesktop.org/show_bug.cgi?id=36527
+ */
+ test_rc_inst_can_use_presub(result, 0,
+ "ADD temp[0].z, temp[6].__x_, const[1].__x_;",
+ "CMP temp[0].y, temp[0]._z__, const[0]._z__, temp[0]._y__;");
+
+
+ /* Testing a random case that should fail
+ *
+ * https://bugs.freedesktop.org/show_bug.cgi?id=36527
+ */
+ test_rc_inst_can_use_presub(result, 0,
+ "ADD temp[3], temp[1], temp[2];",
+ "MAD temp[1], temp[0], const[0].xxxx, -temp[3];");
+
+ /* This tests the case where the arguments of the ADD
+ * instruction share the same register file and index. Normally, we
+ * would need only one source select for these two arguments, but since
+ * they will be part of a presubtract operation we need to use the two
+ * source selects that the presubtract instruction expects
+ * (src0 and src1).
+ *
+ * https://bugs.freedesktop.org/show_bug.cgi?id=36527
+ */
+ test_rc_inst_can_use_presub(result, 0,
+ "ADD temp[3].x, temp[0].x___, temp[0].x___;",
+ "MAD temp[0].xyz, temp[2].xyz_, -temp[3].xxx_, input[5].xyz_;");
+}
+
+int main(int argc, char ** argv)
+{
+ struct test tests[] = {
+ {"rc_inst_can_use_presub()", test_runner_rc_inst_can_use_presub},
+ {NULL, NULL}
+ };
+ run_tests(tests);
+}
--- /dev/null
+#include <errno.h>
+#include <regex.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "../radeon_compiler_util.h"
+#include "../radeon_opcodes.h"
+#include "../radeon_program.h"
+
+#include "rc_test_helpers.h"
+
+/* This file contains some helper functions for filling out the rc_instruction
+ * data structures. These functions take a string as input based on the format
+ * output by rc_program_print().
+ */
+
+#define VERBOSE 0
+
+#define DBG(...) do { if (VERBOSE) fprintf(stderr, __VA_ARGS__); } while(0)
+
+#define REGEX_ERR_BUF_SIZE 50
+
+struct match_info {
+ const char * String;
+ int Length;
+};
+
+static int match_length(regmatch_t * matches, int index)
+{
+ return matches[index].rm_eo - matches[index].rm_so;
+}
+
+static int regex_helper(
+ const char * regex_str,
+ const char * search_str,
+ regmatch_t * matches,
+ int num_matches)
+{
+ char err_buf[REGEX_ERR_BUF_SIZE];
+ regex_t regex;
+ int err_code;
+ unsigned int i;
+
+ err_code = regcomp(®ex, regex_str, REG_EXTENDED);
+ if (err_code) {
+ regerror(err_code, ®ex, err_buf, REGEX_ERR_BUF_SIZE);
+ fprintf(stderr, "Failed to compile regex: %s\n", err_buf);
+ return 0;
+ }
+
+ err_code = regexec(®ex, search_str, num_matches, matches, 0);
+ DBG("Search string: '%s'\n", search_str);
+ for (i = 0; i < num_matches; i++) {
+ DBG("Match %u start = %d end = %d\n", i,
+ matches[i].rm_so, matches[i].rm_eo);
+ }
+ if (err_code) {
+ regerror(err_code, ®ex, err_buf, REGEX_ERR_BUF_SIZE);
+ fprintf(stderr, "Failed to match regex: %s\n", err_buf);
+ return 0;
+ }
+ return 1;
+}
+
+#define REGEX_SRC_MATCHES 6
+
+struct src_tokens {
+ struct match_info Negate;
+ struct match_info Abs;
+ struct match_info File;
+ struct match_info Index;
+ struct match_info Swizzle;
+};
+
+/**
+ * Initialize the source register at index src_index for the instruction based
+ * on src_str.
+ *
+ * NOTE: Warning in init_rc_normal_instruction() applies to this function as
+ * well.
+ *
+ * @param src_str A string that represents the source register. The format for
+ * this string is the same that is output by rc_program_print.
+ * @return 1 On success, 0 on failure
+ */
+int init_rc_normal_src(
+ struct rc_instruction * inst,
+ unsigned int src_index,
+ const char * src_str)
+{
+ const char * regex_str = "(-*)(\\|*)([[:lower:]]*)\\[([[:digit:]])\\](\\.*[[:lower:]-]*)";
+ regmatch_t matches[REGEX_SRC_MATCHES];
+ struct src_tokens tokens;
+ struct rc_src_register * src_reg = &inst->U.I.SrcReg[src_index];
+ unsigned int i;
+
+ /* Execute the regex */
+ if (!regex_helper(regex_str, src_str, matches, REGEX_SRC_MATCHES)) {
+ fprintf(stderr, "Failed to execute regex for src register.\n");
+ return 0;
+ }
+
+ /* Create Tokens */
+ tokens.Negate.String = src_str + matches[1].rm_so;
+ tokens.Negate.Length = match_length(matches, 1);
+ tokens.Abs.String = src_str + matches[2].rm_so;
+ tokens.Abs.Length = match_length(matches, 2);
+ tokens.File.String = src_str + matches[3].rm_so;
+ tokens.File.Length = match_length(matches, 3);
+ tokens.Index.String = src_str + matches[4].rm_so;
+ tokens.Index.Length = match_length(matches, 4);
+ tokens.Swizzle.String = src_str + matches[5].rm_so;
+ tokens.Swizzle.Length = match_length(matches, 5);
+
+ /* Negate */
+ if (tokens.Negate.Length > 0) {
+ src_reg->Negate = RC_MASK_XYZW;
+ }
+
+ /* Abs */
+ if (tokens.Abs.Length > 0) {
+ src_reg->Abs = 1;
+ }
+
+ /* File */
+ if (!strncmp(tokens.File.String, "temp", tokens.File.Length)) {
+ src_reg->File = RC_FILE_TEMPORARY;
+ } else if (!strncmp(tokens.File.String, "input", tokens.File.Length)) {
+ src_reg->File = RC_FILE_INPUT;
+ } else if (!strncmp(tokens.File.String, "const", tokens.File.Length)) {
+ src_reg->File = RC_FILE_CONSTANT;
+ } else if (!strncmp(tokens.File.String, "none", tokens.File.Length)) {
+ src_reg->File = RC_FILE_NONE;
+ }
+
+ /* Index */
+ errno = 0;
+ src_reg->Index = strtol(tokens.Index.String, NULL, 10);
+ if (errno > 0) {
+ fprintf(stderr, "Could not convert src register index.\n");
+ return 0;
+ }
+
+ /* Swizzle */
+ if (tokens.Swizzle.Length == 0) {
+ src_reg->Swizzle = RC_SWIZZLE_XYZW;
+ } else {
+ int str_index = 1;
+ src_reg->Swizzle = RC_MAKE_SWIZZLE_SMEAR(RC_SWIZZLE_UNUSED);
+ if (tokens.Swizzle.String[0] != '.') {
+ fprintf(stderr, "First char of swizzle is not valid.\n");
+ return 0;
+ }
+ for (i = 0; i < 4; i++, str_index++) {
+ if (tokens.Swizzle.String[str_index] == '-') {
+ src_reg->Negate |= (1 << i);
+ str_index++;
+ }
+ switch(tokens.Swizzle.String[str_index]) {
+ case 'x':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_X);
+ break;
+ case 'y':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_Y);
+ break;
+ case 'z':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_Z);
+ break;
+ case 'w':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_W);
+ break;
+ case '1':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_ONE);
+ break;
+ case '0':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_ZERO);
+ break;
+ case 'H':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_HALF);
+ break;
+ case '_':
+ SET_SWZ(src_reg->Swizzle, i, RC_SWIZZLE_UNUSED);
+ break;
+ default:
+ fprintf(stderr, "Unknown src register swizzle.\n");
+ return 0;
+ }
+ }
+ }
+ DBG("File=%u index=%u swizzle=%x negate=%u abs=%u\n",
+ src_reg->File, src_reg->Index, src_reg->Swizzle,
+ src_reg->Negate, src_reg->Abs);
+ return 1;
+}
+
+#define REGEX_DST_MATCHES 4
+
+struct dst_tokens {
+ struct match_info File;
+ struct match_info Index;
+ struct match_info WriteMask;
+};
+
+/**
+ * Initialize the destination for the instruction based on dst_str.
+ *
+ * NOTE: Warning in init_rc_normal_instruction() applies to this function as
+ * well.
+ *
+ * @param dst_str A string that represents the destination register. The format
+ * for this string is the same that is output by rc_program_print.
+ * @return 1 On success, 0 on failure
+ */
+int init_rc_normal_dst(
+ struct rc_instruction * inst,
+ const char * dst_str)
+{
+ const char * regex_str = "([[:lower:]]*)\\[([[:digit:]]*)\\](\\.*[[:lower:]]*)";
+ regmatch_t matches[REGEX_DST_MATCHES];
+ struct dst_tokens tokens;
+ unsigned int i;
+
+ /* Execute the regex */
+ if (!regex_helper(regex_str, dst_str, matches, REGEX_DST_MATCHES)) {
+ fprintf(stderr, "Failed to execute regex for dst register.\n");
+ return 0;
+ }
+
+ /* Create Tokens */
+ tokens.File.String = dst_str + matches[1].rm_so;
+ tokens.File.Length = match_length(matches, 1);
+ tokens.Index.String = dst_str + matches[2].rm_so;
+ tokens.Index.Length = match_length(matches, 2);
+ tokens.WriteMask.String = dst_str + matches[3].rm_so;
+ tokens.WriteMask.Length = match_length(matches, 3);
+
+ /* File Type */
+ if (!strncmp(tokens.File.String, "temp", tokens.File.Length)) {
+ inst->U.I.DstReg.File = RC_FILE_TEMPORARY;
+ } else if (!strncmp(tokens.File.String, "output", tokens.File.Length)) {
+ inst->U.I.DstReg.File = RC_FILE_OUTPUT;
+ } else {
+ fprintf(stderr, "Unknown dst register file type.\n");
+ return 0;
+ }
+
+ /* File Index */
+ errno = 0;
+ inst->U.I.DstReg.Index = strtol(tokens.Index.String, NULL, 10);
+
+ if (errno > 0) {
+ fprintf(stderr, "Could not convert dst register index\n");
+ return 0;
+ }
+
+ /* WriteMask */
+ if (tokens.WriteMask.Length == 0) {
+ inst->U.I.DstReg.WriteMask = RC_MASK_XYZW;
+ } else {
+ /* The first character should be '.' */
+ if (tokens.WriteMask.String[0] != '.') {
+ fprintf(stderr, "1st char of writemask is not valid.\n");
+ return 0;
+ }
+ for (i = 1; i < tokens.WriteMask.Length; i++) {
+ switch(tokens.WriteMask.String[i]) {
+ case 'x':
+ inst->U.I.DstReg.WriteMask |= RC_MASK_X;
+ break;
+ case 'y':
+ inst->U.I.DstReg.WriteMask |= RC_MASK_Y;
+ break;
+ case 'z':
+ inst->U.I.DstReg.WriteMask |= RC_MASK_Z;
+ break;
+ case 'w':
+ inst->U.I.DstReg.WriteMask |= RC_MASK_W;
+ break;
+ default:
+ fprintf(stderr, "Unknown swizzle in writemask.\n");
+ return 0;
+ }
+ }
+ }
+ DBG("Dst Reg File=%u Index=%d Writemask=%d\n",
+ inst->U.I.DstReg.File,
+ inst->U.I.DstReg.Index,
+ inst->U.I.DstReg.WriteMask);
+ return 1;
+}
+
+#define REGEX_INST_MATCHES 7
+
+struct inst_tokens {
+ struct match_info Opcode;
+ struct match_info Sat;
+ struct match_info Dst;
+ struct match_info Srcs[3];
+};
+
+/**
+ * Initialize a normal instruction based on inst_str.
+ *
+ * WARNING: This function might not be able to handle every kind of format that
+ * rc_program_print() can output. If you are having problems with a
+ * particular string, you may need to add support for it to this functions.
+ *
+ * @param inst_str A string that represents the source register. The format for
+ * this string is the same that is output by rc_program_print.
+ * @return 1 On success, 0 on failure
+ */
+int init_rc_normal_instruction(
+ struct rc_instruction * inst,
+ const char * inst_str)
+{
+ const char * regex_str = "([[:upper:]]+)(_SAT)* ([^,]*)[, ]*([^,]*)[, ]*([^,]*)[, ]*([^;]*)";
+ int i;
+ regmatch_t matches[REGEX_INST_MATCHES];
+ struct inst_tokens tokens;
+
+ /* Initialize inst */
+ memset(inst, 0, sizeof(struct rc_instruction));
+ inst->Type = RC_INSTRUCTION_NORMAL;
+
+ /* Execute the regex */
+ if (!regex_helper(regex_str, inst_str, matches, REGEX_INST_MATCHES)) {
+ return 0;
+ }
+ memset(&tokens, 0, sizeof(tokens));
+
+ /* Create Tokens */
+ tokens.Opcode.String = inst_str + matches[1].rm_so;
+ tokens.Opcode.Length = match_length(matches, 1);
+ if (matches[2].rm_so > -1) {
+ tokens.Sat.String = inst_str + matches[2].rm_so;
+ tokens.Sat.Length = match_length(matches, 2);
+ }
+
+
+ /* Fill out the rest of the instruction. */
+ for (i = 0; i < MAX_RC_OPCODE; i++) {
+ const struct rc_opcode_info * info = rc_get_opcode_info(i);
+ unsigned int first_src = 3;
+ unsigned int j;
+ if (strncmp(tokens.Opcode.String, info->Name, tokens.Opcode.Length)) {
+ continue;
+ }
+ inst->U.I.Opcode = info->Opcode;
+ if (info->HasDstReg) {
+ char * dst_str;
+ tokens.Dst.String = inst_str + matches[3].rm_so;
+ tokens.Dst.Length = match_length(matches, 3);
+ first_src++;
+
+ dst_str = malloc(sizeof(char) * (tokens.Dst.Length + 1));
+ strncpy(dst_str, tokens.Dst.String, tokens.Dst.Length);
+ dst_str[tokens.Dst.Length] = '\0';
+ init_rc_normal_dst(inst, dst_str);
+ free(dst_str);
+ }
+ for (j = 0; j < info->NumSrcRegs; j++) {
+ char * src_str;
+ tokens.Srcs[j].String =
+ inst_str + matches[first_src + j].rm_so;
+ tokens.Srcs[j].Length =
+ match_length(matches, first_src + j);
+
+ src_str = malloc(sizeof(char) *
+ (tokens.Srcs[j].Length + 1));
+ strncpy(src_str, tokens.Srcs[j].String,
+ tokens.Srcs[j].Length);
+ src_str[tokens.Srcs[j].Length] = '\0';
+ init_rc_normal_src(inst, j, src_str);
+ }
+ break;
+ }
+ return 1;
+}
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